^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * KVM Microsoft Hyper-V emulation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * derived from arch/x86/kvm/x86.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2006 Qumranet, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2008 Qumranet, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright IBM Corporation, 2008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright 2010 Red Hat, Inc. and/or its affiliates.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Avi Kivity <avi@qumranet.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * Yaniv Kamay <yaniv@qumranet.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Amit Shah <amit.shah@qumranet.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Ben-Ami Yassour <benami@il.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Andrey Smetanin <asmetanin@virtuozzo.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "x86.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "lapic.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "ioapic.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "cpuid.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "hyperv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/kvm_host.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/highmem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/sched/cputime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/eventfd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <asm/apicdef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <trace/events/kvm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include "trace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include "irq.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define KVM_HV_MAX_SPARSE_VCPU_SET_BITS DIV_ROUND_UP(KVM_MAX_VCPUS, 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static void stimer_mark_pending(struct kvm_vcpu_hv_stimer *stimer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) bool vcpu_kick);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static inline u64 synic_read_sint(struct kvm_vcpu_hv_synic *synic, int sint)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return atomic64_read(&synic->sint[sint]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static inline int synic_get_sint_vector(u64 sint_value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (sint_value & HV_SYNIC_SINT_MASKED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return sint_value & HV_SYNIC_SINT_VECTOR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static bool synic_has_vector_connected(struct kvm_vcpu_hv_synic *synic,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) int vector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) for (i = 0; i < ARRAY_SIZE(synic->sint); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (synic_get_sint_vector(synic_read_sint(synic, i)) == vector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static bool synic_has_vector_auto_eoi(struct kvm_vcpu_hv_synic *synic,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int vector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) u64 sint_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) for (i = 0; i < ARRAY_SIZE(synic->sint); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) sint_value = synic_read_sint(synic, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (synic_get_sint_vector(sint_value) == vector &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) sint_value & HV_SYNIC_SINT_AUTO_EOI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static void synic_update_vector(struct kvm_vcpu_hv_synic *synic,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int vector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (vector < HV_SYNIC_FIRST_VALID_VECTOR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (synic_has_vector_connected(synic, vector))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) __set_bit(vector, synic->vec_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) __clear_bit(vector, synic->vec_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (synic_has_vector_auto_eoi(synic, vector))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) __set_bit(vector, synic->auto_eoi_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) __clear_bit(vector, synic->auto_eoi_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static int synic_set_sint(struct kvm_vcpu_hv_synic *synic, int sint,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) u64 data, bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int vector, old_vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) bool masked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) vector = data & HV_SYNIC_SINT_VECTOR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) masked = data & HV_SYNIC_SINT_MASKED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * Valid vectors are 16-255, however, nested Hyper-V attempts to write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * default '0x10000' value on boot and this should not #GP. We need to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * allow zero-initing the register from host as well.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (vector < HV_SYNIC_FIRST_VALID_VECTOR && !host && !masked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * Guest may configure multiple SINTs to use the same vector, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * we maintain a bitmap of vectors handled by synic, and a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * bitmap of vectors with auto-eoi behavior. The bitmaps are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * updated here, and atomically queried on fast paths.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) old_vector = synic_read_sint(synic, sint) & HV_SYNIC_SINT_VECTOR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) atomic64_set(&synic->sint[sint], data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) synic_update_vector(synic, old_vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) synic_update_vector(synic, vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /* Load SynIC vectors into EOI exit bitmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) kvm_make_request(KVM_REQ_SCAN_IOAPIC, synic_to_vcpu(synic));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static struct kvm_vcpu *get_vcpu_by_vpidx(struct kvm *kvm, u32 vpidx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct kvm_vcpu *vcpu = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (vpidx >= KVM_MAX_VCPUS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) vcpu = kvm_get_vcpu(kvm, vpidx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (vcpu && vcpu_to_hv_vcpu(vcpu)->vp_index == vpidx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return vcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) kvm_for_each_vcpu(i, vcpu, kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (vcpu_to_hv_vcpu(vcpu)->vp_index == vpidx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return vcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static struct kvm_vcpu_hv_synic *synic_get(struct kvm *kvm, u32 vpidx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct kvm_vcpu *vcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) struct kvm_vcpu_hv_synic *synic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) vcpu = get_vcpu_by_vpidx(kvm, vpidx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (!vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) synic = vcpu_to_synic(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return (synic->active) ? synic : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static void kvm_hv_notify_acked_sint(struct kvm_vcpu *vcpu, u32 sint)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) struct kvm *kvm = vcpu->kvm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct kvm_vcpu_hv_synic *synic = vcpu_to_synic(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct kvm_vcpu_hv *hv_vcpu = vcpu_to_hv_vcpu(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) struct kvm_vcpu_hv_stimer *stimer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) int gsi, idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) trace_kvm_hv_notify_acked_sint(vcpu->vcpu_id, sint);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* Try to deliver pending Hyper-V SynIC timers messages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) for (idx = 0; idx < ARRAY_SIZE(hv_vcpu->stimer); idx++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) stimer = &hv_vcpu->stimer[idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) if (stimer->msg_pending && stimer->config.enable &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) !stimer->config.direct_mode &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) stimer->config.sintx == sint)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) stimer_mark_pending(stimer, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) idx = srcu_read_lock(&kvm->irq_srcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) gsi = atomic_read(&synic->sint_to_gsi[sint]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (gsi != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) kvm_notify_acked_gsi(kvm, gsi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) srcu_read_unlock(&kvm->irq_srcu, idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static void synic_exit(struct kvm_vcpu_hv_synic *synic, u32 msr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) hv_vcpu->exit.type = KVM_EXIT_HYPERV_SYNIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) hv_vcpu->exit.u.synic.msr = msr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) hv_vcpu->exit.u.synic.control = synic->control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) hv_vcpu->exit.u.synic.evt_page = synic->evt_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) hv_vcpu->exit.u.synic.msg_page = synic->msg_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) kvm_make_request(KVM_REQ_HV_EXIT, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int synic_set_msr(struct kvm_vcpu_hv_synic *synic,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) u32 msr, u64 data, bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) if (!synic->active && (!host || data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) trace_kvm_hv_synic_set_msr(vcpu->vcpu_id, msr, data, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) switch (msr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) case HV_X64_MSR_SCONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) synic->control = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) if (!host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) synic_exit(synic, msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) case HV_X64_MSR_SVERSION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (!host) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) synic->version = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) case HV_X64_MSR_SIEFP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if ((data & HV_SYNIC_SIEFP_ENABLE) && !host &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) !synic->dont_zero_synic_pages)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (kvm_clear_guest(vcpu->kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) data & PAGE_MASK, PAGE_SIZE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) synic->evt_page = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) if (!host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) synic_exit(synic, msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) case HV_X64_MSR_SIMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if ((data & HV_SYNIC_SIMP_ENABLE) && !host &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) !synic->dont_zero_synic_pages)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (kvm_clear_guest(vcpu->kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) data & PAGE_MASK, PAGE_SIZE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) synic->msg_page = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (!host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) synic_exit(synic, msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) case HV_X64_MSR_EOM: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) if (!synic->active)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) for (i = 0; i < ARRAY_SIZE(synic->sint); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) kvm_hv_notify_acked_sint(vcpu, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) ret = synic_set_sint(synic, msr - HV_X64_MSR_SINT0, data, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) static bool kvm_hv_is_syndbg_enabled(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct kvm_cpuid_entry2 *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) entry = kvm_find_cpuid_entry(vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (!entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) return entry->eax & HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static int kvm_hv_syndbg_complete_userspace(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct kvm *kvm = vcpu->kvm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) struct kvm_hv *hv = &kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) if (vcpu->run->hyperv.u.syndbg.msr == HV_X64_MSR_SYNDBG_CONTROL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) hv->hv_syndbg.control.status =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) vcpu->run->hyperv.u.syndbg.status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static void syndbg_exit(struct kvm_vcpu *vcpu, u32 msr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) struct kvm_hv_syndbg *syndbg = vcpu_to_hv_syndbg(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) hv_vcpu->exit.type = KVM_EXIT_HYPERV_SYNDBG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) hv_vcpu->exit.u.syndbg.msr = msr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) hv_vcpu->exit.u.syndbg.control = syndbg->control.control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) hv_vcpu->exit.u.syndbg.send_page = syndbg->control.send_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) hv_vcpu->exit.u.syndbg.recv_page = syndbg->control.recv_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) hv_vcpu->exit.u.syndbg.pending_page = syndbg->control.pending_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) vcpu->arch.complete_userspace_io =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) kvm_hv_syndbg_complete_userspace;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) kvm_make_request(KVM_REQ_HV_EXIT, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static int syndbg_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) struct kvm_hv_syndbg *syndbg = vcpu_to_hv_syndbg(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (!kvm_hv_is_syndbg_enabled(vcpu) && !host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) trace_kvm_hv_syndbg_set_msr(vcpu->vcpu_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) vcpu_to_hv_vcpu(vcpu)->vp_index, msr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) switch (msr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) case HV_X64_MSR_SYNDBG_CONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) syndbg->control.control = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (!host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) syndbg_exit(vcpu, msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) case HV_X64_MSR_SYNDBG_STATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) syndbg->control.status = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) case HV_X64_MSR_SYNDBG_SEND_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) syndbg->control.send_page = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) case HV_X64_MSR_SYNDBG_RECV_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) syndbg->control.recv_page = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) case HV_X64_MSR_SYNDBG_PENDING_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) syndbg->control.pending_page = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (!host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) syndbg_exit(vcpu, msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) case HV_X64_MSR_SYNDBG_OPTIONS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) syndbg->options = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) static int syndbg_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) struct kvm_hv_syndbg *syndbg = vcpu_to_hv_syndbg(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (!kvm_hv_is_syndbg_enabled(vcpu) && !host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) switch (msr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) case HV_X64_MSR_SYNDBG_CONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) *pdata = syndbg->control.control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) case HV_X64_MSR_SYNDBG_STATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) *pdata = syndbg->control.status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) case HV_X64_MSR_SYNDBG_SEND_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) *pdata = syndbg->control.send_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) case HV_X64_MSR_SYNDBG_RECV_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) *pdata = syndbg->control.recv_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) case HV_X64_MSR_SYNDBG_PENDING_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) *pdata = syndbg->control.pending_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) case HV_X64_MSR_SYNDBG_OPTIONS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) *pdata = syndbg->options;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) trace_kvm_hv_syndbg_get_msr(vcpu->vcpu_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) vcpu_to_hv_vcpu(vcpu)->vp_index, msr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) *pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static int synic_get_msr(struct kvm_vcpu_hv_synic *synic, u32 msr, u64 *pdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (!synic->active && !host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) switch (msr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) case HV_X64_MSR_SCONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) *pdata = synic->control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) case HV_X64_MSR_SVERSION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) *pdata = synic->version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) case HV_X64_MSR_SIEFP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) *pdata = synic->evt_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) case HV_X64_MSR_SIMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) *pdata = synic->msg_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) case HV_X64_MSR_EOM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) *pdata = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) *pdata = atomic64_read(&synic->sint[msr - HV_X64_MSR_SINT0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) static int synic_set_irq(struct kvm_vcpu_hv_synic *synic, u32 sint)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) struct kvm_lapic_irq irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) int ret, vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) if (sint >= ARRAY_SIZE(synic->sint))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) vector = synic_get_sint_vector(synic_read_sint(synic, sint));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) if (vector < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) memset(&irq, 0, sizeof(irq));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) irq.shorthand = APIC_DEST_SELF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) irq.dest_mode = APIC_DEST_PHYSICAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) irq.delivery_mode = APIC_DM_FIXED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) irq.vector = vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) irq.level = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) ret = kvm_irq_delivery_to_apic(vcpu->kvm, vcpu->arch.apic, &irq, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) trace_kvm_hv_synic_set_irq(vcpu->vcpu_id, sint, irq.vector, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vpidx, u32 sint)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) struct kvm_vcpu_hv_synic *synic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) synic = synic_get(kvm, vpidx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) if (!synic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) return synic_set_irq(synic, sint);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) struct kvm_vcpu_hv_synic *synic = vcpu_to_synic(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) trace_kvm_hv_synic_send_eoi(vcpu->vcpu_id, vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) for (i = 0; i < ARRAY_SIZE(synic->sint); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) if (synic_get_sint_vector(synic_read_sint(synic, i)) == vector)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) kvm_hv_notify_acked_sint(vcpu, i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) static int kvm_hv_set_sint_gsi(struct kvm *kvm, u32 vpidx, u32 sint, int gsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) struct kvm_vcpu_hv_synic *synic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) synic = synic_get(kvm, vpidx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) if (!synic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) if (sint >= ARRAY_SIZE(synic->sint_to_gsi))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) atomic_set(&synic->sint_to_gsi[sint], gsi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) void kvm_hv_irq_routing_update(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) struct kvm_irq_routing_table *irq_rt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) struct kvm_kernel_irq_routing_entry *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) u32 gsi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) irq_rt = srcu_dereference_check(kvm->irq_routing, &kvm->irq_srcu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) lockdep_is_held(&kvm->irq_lock));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) for (gsi = 0; gsi < irq_rt->nr_rt_entries; gsi++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) hlist_for_each_entry(e, &irq_rt->map[gsi], link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) if (e->type == KVM_IRQ_ROUTING_HV_SINT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) kvm_hv_set_sint_gsi(kvm, e->hv_sint.vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) e->hv_sint.sint, gsi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) static void synic_init(struct kvm_vcpu_hv_synic *synic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) memset(synic, 0, sizeof(*synic));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) synic->version = HV_SYNIC_VERSION_1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) for (i = 0; i < ARRAY_SIZE(synic->sint); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) atomic64_set(&synic->sint[i], HV_SYNIC_SINT_MASKED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) atomic_set(&synic->sint_to_gsi[i], -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) static u64 get_time_ref_counter(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) struct kvm_hv *hv = &kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) struct kvm_vcpu *vcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) u64 tsc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) * The guest has not set up the TSC page or the clock isn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) * stable, fall back to get_kvmclock_ns.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) if (!hv->tsc_ref.tsc_sequence)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) return div_u64(get_kvmclock_ns(kvm), 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) vcpu = kvm_get_vcpu(kvm, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) tsc = kvm_read_l1_tsc(vcpu, rdtsc());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return mul_u64_u64_shr(tsc, hv->tsc_ref.tsc_scale, 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) + hv->tsc_ref.tsc_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) static void stimer_mark_pending(struct kvm_vcpu_hv_stimer *stimer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) bool vcpu_kick)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) struct kvm_vcpu *vcpu = stimer_to_vcpu(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) set_bit(stimer->index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) vcpu_to_hv_vcpu(vcpu)->stimer_pending_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) kvm_make_request(KVM_REQ_HV_STIMER, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) if (vcpu_kick)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) kvm_vcpu_kick(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) static void stimer_cleanup(struct kvm_vcpu_hv_stimer *stimer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) struct kvm_vcpu *vcpu = stimer_to_vcpu(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) trace_kvm_hv_stimer_cleanup(stimer_to_vcpu(stimer)->vcpu_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) stimer->index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) hrtimer_cancel(&stimer->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) clear_bit(stimer->index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) vcpu_to_hv_vcpu(vcpu)->stimer_pending_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) stimer->msg_pending = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) stimer->exp_time = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) static enum hrtimer_restart stimer_timer_callback(struct hrtimer *timer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) struct kvm_vcpu_hv_stimer *stimer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) stimer = container_of(timer, struct kvm_vcpu_hv_stimer, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) trace_kvm_hv_stimer_callback(stimer_to_vcpu(stimer)->vcpu_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) stimer->index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) stimer_mark_pending(stimer, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) return HRTIMER_NORESTART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) * stimer_start() assumptions:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) * a) stimer->count is not equal to 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * b) stimer->config has HV_STIMER_ENABLE flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) static int stimer_start(struct kvm_vcpu_hv_stimer *stimer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) u64 time_now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) ktime_t ktime_now;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) time_now = get_time_ref_counter(stimer_to_vcpu(stimer)->kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) ktime_now = ktime_get();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (stimer->config.periodic) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) if (stimer->exp_time) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) if (time_now >= stimer->exp_time) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) u64 remainder;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) div64_u64_rem(time_now - stimer->exp_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) stimer->count, &remainder);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) stimer->exp_time =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) time_now + (stimer->count - remainder);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) stimer->exp_time = time_now + stimer->count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) trace_kvm_hv_stimer_start_periodic(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) stimer_to_vcpu(stimer)->vcpu_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) stimer->index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) time_now, stimer->exp_time);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) hrtimer_start(&stimer->timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) ktime_add_ns(ktime_now,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) 100 * (stimer->exp_time - time_now)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) HRTIMER_MODE_ABS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) stimer->exp_time = stimer->count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) if (time_now >= stimer->count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) * Expire timer according to Hypervisor Top-Level Functional
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) * specification v4(15.3.1):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) * "If a one shot is enabled and the specified count is in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) * the past, it will expire immediately."
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) stimer_mark_pending(stimer, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) trace_kvm_hv_stimer_start_one_shot(stimer_to_vcpu(stimer)->vcpu_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) stimer->index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) time_now, stimer->count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) hrtimer_start(&stimer->timer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) ktime_add_ns(ktime_now, 100 * (stimer->count - time_now)),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) HRTIMER_MODE_ABS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) static int stimer_set_config(struct kvm_vcpu_hv_stimer *stimer, u64 config,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) union hv_stimer_config new_config = {.as_uint64 = config},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) old_config = {.as_uint64 = stimer->config.as_uint64};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) struct kvm_vcpu *vcpu = stimer_to_vcpu(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) struct kvm_vcpu_hv_synic *synic = vcpu_to_synic(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) if (!synic->active && (!host || config))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) trace_kvm_hv_stimer_set_config(stimer_to_vcpu(stimer)->vcpu_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) stimer->index, config, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) stimer_cleanup(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) if (old_config.enable &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) !new_config.direct_mode && new_config.sintx == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) new_config.enable = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) stimer->config.as_uint64 = new_config.as_uint64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) if (stimer->config.enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) stimer_mark_pending(stimer, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) static int stimer_set_count(struct kvm_vcpu_hv_stimer *stimer, u64 count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) struct kvm_vcpu *vcpu = stimer_to_vcpu(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) struct kvm_vcpu_hv_synic *synic = vcpu_to_synic(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) if (!synic->active && (!host || count))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) trace_kvm_hv_stimer_set_count(stimer_to_vcpu(stimer)->vcpu_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) stimer->index, count, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) stimer_cleanup(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) stimer->count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (stimer->count == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) stimer->config.enable = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) else if (stimer->config.auto_enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) stimer->config.enable = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (stimer->config.enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) stimer_mark_pending(stimer, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) static int stimer_get_config(struct kvm_vcpu_hv_stimer *stimer, u64 *pconfig)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) *pconfig = stimer->config.as_uint64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) static int stimer_get_count(struct kvm_vcpu_hv_stimer *stimer, u64 *pcount)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) *pcount = stimer->count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) static int synic_deliver_msg(struct kvm_vcpu_hv_synic *synic, u32 sint,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) struct hv_message *src_msg, bool no_retry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) int msg_off = offsetof(struct hv_message_page, sint_message[sint]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) gfn_t msg_page_gfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) struct hv_message_header hv_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) if (!(synic->msg_page & HV_SYNIC_SIMP_ENABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) msg_page_gfn = synic->msg_page >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) * Strictly following the spec-mandated ordering would assume setting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) * .msg_pending before checking .message_type. However, this function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) * is only called in vcpu context so the entire update is atomic from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) * guest POV and thus the exact order here doesn't matter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) r = kvm_vcpu_read_guest_page(vcpu, msg_page_gfn, &hv_hdr.message_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) msg_off + offsetof(struct hv_message,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) header.message_type),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) sizeof(hv_hdr.message_type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (r < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) if (hv_hdr.message_type != HVMSG_NONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) if (no_retry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) hv_hdr.message_flags.msg_pending = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) r = kvm_vcpu_write_guest_page(vcpu, msg_page_gfn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) &hv_hdr.message_flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) msg_off +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) offsetof(struct hv_message,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) header.message_flags),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) sizeof(hv_hdr.message_flags));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) if (r < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) return -EAGAIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) r = kvm_vcpu_write_guest_page(vcpu, msg_page_gfn, src_msg, msg_off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) sizeof(src_msg->header) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) src_msg->header.payload_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) if (r < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) r = synic_set_irq(synic, sint);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) if (r < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) if (r == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) static int stimer_send_msg(struct kvm_vcpu_hv_stimer *stimer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) struct kvm_vcpu *vcpu = stimer_to_vcpu(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) struct hv_message *msg = &stimer->msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) struct hv_timer_message_payload *payload =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) (struct hv_timer_message_payload *)&msg->u.payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) * To avoid piling up periodic ticks, don't retry message
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) * delivery for them (within "lazy" lost ticks policy).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) bool no_retry = stimer->config.periodic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) payload->expiration_time = stimer->exp_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) payload->delivery_time = get_time_ref_counter(vcpu->kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) return synic_deliver_msg(vcpu_to_synic(vcpu),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) stimer->config.sintx, msg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) no_retry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) static int stimer_notify_direct(struct kvm_vcpu_hv_stimer *stimer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) struct kvm_vcpu *vcpu = stimer_to_vcpu(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) struct kvm_lapic_irq irq = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) .delivery_mode = APIC_DM_FIXED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) .vector = stimer->config.apic_vector
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) if (lapic_in_kernel(vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) return !kvm_apic_set_irq(vcpu, &irq, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) static void stimer_expiration(struct kvm_vcpu_hv_stimer *stimer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) int r, direct = stimer->config.direct_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) stimer->msg_pending = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) if (!direct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) r = stimer_send_msg(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) r = stimer_notify_direct(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) trace_kvm_hv_stimer_expiration(stimer_to_vcpu(stimer)->vcpu_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) stimer->index, direct, r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) if (!r) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) stimer->msg_pending = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) if (!(stimer->config.periodic))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) stimer->config.enable = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) void kvm_hv_process_stimers(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) struct kvm_vcpu_hv *hv_vcpu = vcpu_to_hv_vcpu(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) struct kvm_vcpu_hv_stimer *stimer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) u64 time_now, exp_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) for (i = 0; i < ARRAY_SIZE(hv_vcpu->stimer); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) if (test_and_clear_bit(i, hv_vcpu->stimer_pending_bitmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) stimer = &hv_vcpu->stimer[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) if (stimer->config.enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) exp_time = stimer->exp_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) if (exp_time) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) time_now =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) get_time_ref_counter(vcpu->kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) if (time_now >= exp_time)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) stimer_expiration(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) if ((stimer->config.enable) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) stimer->count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) if (!stimer->msg_pending)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) stimer_start(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) stimer_cleanup(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) struct kvm_vcpu_hv *hv_vcpu = vcpu_to_hv_vcpu(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) for (i = 0; i < ARRAY_SIZE(hv_vcpu->stimer); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) stimer_cleanup(&hv_vcpu->stimer[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) bool kvm_hv_assist_page_enabled(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) if (!(vcpu->arch.hyperv.hv_vapic & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) return vcpu->arch.pv_eoi.msr_val & KVM_MSR_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) EXPORT_SYMBOL_GPL(kvm_hv_assist_page_enabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) bool kvm_hv_get_assist_page(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) struct hv_vp_assist_page *assist_page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) if (!kvm_hv_assist_page_enabled(vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) return !kvm_read_guest_cached(vcpu->kvm, &vcpu->arch.pv_eoi.data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) assist_page, sizeof(*assist_page));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) EXPORT_SYMBOL_GPL(kvm_hv_get_assist_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) static void stimer_prepare_msg(struct kvm_vcpu_hv_stimer *stimer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) struct hv_message *msg = &stimer->msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) struct hv_timer_message_payload *payload =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) (struct hv_timer_message_payload *)&msg->u.payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) memset(&msg->header, 0, sizeof(msg->header));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) msg->header.message_type = HVMSG_TIMER_EXPIRED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) msg->header.payload_size = sizeof(*payload);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) payload->timer_index = stimer->index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) payload->expiration_time = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) payload->delivery_time = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) static void stimer_init(struct kvm_vcpu_hv_stimer *stimer, int timer_index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) memset(stimer, 0, sizeof(*stimer));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) stimer->index = timer_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) hrtimer_init(&stimer->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) stimer->timer.function = stimer_timer_callback;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) stimer_prepare_msg(stimer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) struct kvm_vcpu_hv *hv_vcpu = vcpu_to_hv_vcpu(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) synic_init(&hv_vcpu->synic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) bitmap_zero(hv_vcpu->stimer_pending_bitmap, HV_SYNIC_STIMER_COUNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) for (i = 0; i < ARRAY_SIZE(hv_vcpu->stimer); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) stimer_init(&hv_vcpu->stimer[i], i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) void kvm_hv_vcpu_postcreate(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) struct kvm_vcpu_hv *hv_vcpu = vcpu_to_hv_vcpu(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) hv_vcpu->vp_index = kvm_vcpu_get_idx(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) struct kvm_vcpu_hv_synic *synic = vcpu_to_synic(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) * Hyper-V SynIC auto EOI SINT's are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) * not compatible with APICV, so request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) * to deactivate APICV permanently.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) kvm_request_apicv_update(vcpu->kvm, false, APICV_INHIBIT_REASON_HYPERV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) synic->active = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) synic->dont_zero_synic_pages = dont_zero_synic_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) synic->control = HV_SYNIC_CONTROL_ENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) static bool kvm_hv_msr_partition_wide(u32 msr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) bool r = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) switch (msr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) case HV_X64_MSR_GUEST_OS_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) case HV_X64_MSR_HYPERCALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) case HV_X64_MSR_REFERENCE_TSC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) case HV_X64_MSR_TIME_REF_COUNT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) case HV_X64_MSR_CRASH_CTL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) case HV_X64_MSR_RESET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) case HV_X64_MSR_TSC_EMULATION_CONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) case HV_X64_MSR_TSC_EMULATION_STATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) case HV_X64_MSR_SYNDBG_OPTIONS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) r = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) static int kvm_hv_msr_get_crash_data(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) u32 index, u64 *pdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) struct kvm_hv *hv = &vcpu->kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) size_t size = ARRAY_SIZE(hv->hv_crash_param);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) if (WARN_ON_ONCE(index >= size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) *pdata = hv->hv_crash_param[array_index_nospec(index, size)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) static int kvm_hv_msr_get_crash_ctl(struct kvm_vcpu *vcpu, u64 *pdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) struct kvm_hv *hv = &vcpu->kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) *pdata = hv->hv_crash_ctl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) static int kvm_hv_msr_set_crash_ctl(struct kvm_vcpu *vcpu, u64 data, bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) struct kvm_hv *hv = &vcpu->kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) if (host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) hv->hv_crash_ctl = data & HV_CRASH_CTL_CRASH_NOTIFY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) if (!host && (data & HV_CRASH_CTL_CRASH_NOTIFY)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) vcpu_debug(vcpu, "hv crash (0x%llx 0x%llx 0x%llx 0x%llx 0x%llx)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) hv->hv_crash_param[0],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) hv->hv_crash_param[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) hv->hv_crash_param[2],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) hv->hv_crash_param[3],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) hv->hv_crash_param[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) /* Send notification about crash to user space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) kvm_make_request(KVM_REQ_HV_CRASH, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) static int kvm_hv_msr_set_crash_data(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) u32 index, u64 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) struct kvm_hv *hv = &vcpu->kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) size_t size = ARRAY_SIZE(hv->hv_crash_param);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) if (WARN_ON_ONCE(index >= size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) hv->hv_crash_param[array_index_nospec(index, size)] = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) * The kvmclock and Hyper-V TSC page use similar formulas, and converting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) * between them is possible:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) * kvmclock formula:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) * nsec = (ticks - tsc_timestamp) * tsc_to_system_mul * 2^(tsc_shift-32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) * + system_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) * Hyper-V formula:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) * nsec/100 = ticks * scale / 2^64 + offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) * When tsc_timestamp = system_time = 0, offset is zero in the Hyper-V formula.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) * By dividing the kvmclock formula by 100 and equating what's left we get:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) * ticks * scale / 2^64 = ticks * tsc_to_system_mul * 2^(tsc_shift-32) / 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) * scale / 2^64 = tsc_to_system_mul * 2^(tsc_shift-32) / 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) * scale = tsc_to_system_mul * 2^(32+tsc_shift) / 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) * Now expand the kvmclock formula and divide by 100:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) * nsec = ticks * tsc_to_system_mul * 2^(tsc_shift-32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) * - tsc_timestamp * tsc_to_system_mul * 2^(tsc_shift-32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) * + system_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) * nsec/100 = ticks * tsc_to_system_mul * 2^(tsc_shift-32) / 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) * - tsc_timestamp * tsc_to_system_mul * 2^(tsc_shift-32) / 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) * + system_time / 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) * Replace tsc_to_system_mul * 2^(tsc_shift-32) / 100 by scale / 2^64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) * nsec/100 = ticks * scale / 2^64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) * - tsc_timestamp * scale / 2^64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) * + system_time / 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) * Equate with the Hyper-V formula so that ticks * scale / 2^64 cancels out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) * offset = system_time / 100 - tsc_timestamp * scale / 2^64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) * These two equivalencies are implemented in this function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) static bool compute_tsc_page_parameters(struct pvclock_vcpu_time_info *hv_clock,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) struct ms_hyperv_tsc_page *tsc_ref)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) u64 max_mul;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) if (!(hv_clock->flags & PVCLOCK_TSC_STABLE_BIT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) * check if scale would overflow, if so we use the time ref counter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) * tsc_to_system_mul * 2^(tsc_shift+32) / 100 >= 2^64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) * tsc_to_system_mul / 100 >= 2^(32-tsc_shift)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) * tsc_to_system_mul >= 100 * 2^(32-tsc_shift)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) max_mul = 100ull << (32 - hv_clock->tsc_shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) if (hv_clock->tsc_to_system_mul >= max_mul)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) * Otherwise compute the scale and offset according to the formulas
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) * derived above.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) tsc_ref->tsc_scale =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) mul_u64_u32_div(1ULL << (32 + hv_clock->tsc_shift),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) hv_clock->tsc_to_system_mul,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) tsc_ref->tsc_offset = hv_clock->system_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) do_div(tsc_ref->tsc_offset, 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) tsc_ref->tsc_offset -=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) mul_u64_u64_shr(hv_clock->tsc_timestamp, tsc_ref->tsc_scale, 64);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) void kvm_hv_setup_tsc_page(struct kvm *kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) struct pvclock_vcpu_time_info *hv_clock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) struct kvm_hv *hv = &kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) u32 tsc_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) u64 gfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) BUILD_BUG_ON(sizeof(tsc_seq) != sizeof(hv->tsc_ref.tsc_sequence));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) BUILD_BUG_ON(offsetof(struct ms_hyperv_tsc_page, tsc_sequence) != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) if (!(hv->hv_tsc_page & HV_X64_MSR_TSC_REFERENCE_ENABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) mutex_lock(&kvm->arch.hyperv.hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) if (!(hv->hv_tsc_page & HV_X64_MSR_TSC_REFERENCE_ENABLE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) gfn = hv->hv_tsc_page >> HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) * Because the TSC parameters only vary when there is a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) * change in the master clock, do not bother with caching.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) if (unlikely(kvm_read_guest(kvm, gfn_to_gpa(gfn),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) &tsc_seq, sizeof(tsc_seq))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) * While we're computing and writing the parameters, force the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) * guest to use the time reference count MSR.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) hv->tsc_ref.tsc_sequence = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) if (kvm_write_guest(kvm, gfn_to_gpa(gfn),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) &hv->tsc_ref, sizeof(hv->tsc_ref.tsc_sequence)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) if (!compute_tsc_page_parameters(hv_clock, &hv->tsc_ref))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) /* Ensure sequence is zero before writing the rest of the struct. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) if (kvm_write_guest(kvm, gfn_to_gpa(gfn), &hv->tsc_ref, sizeof(hv->tsc_ref)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) * Now switch to the TSC page mechanism by writing the sequence.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) tsc_seq++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) if (tsc_seq == 0xFFFFFFFF || tsc_seq == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) tsc_seq = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) /* Write the struct entirely before the non-zero sequence. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) hv->tsc_ref.tsc_sequence = tsc_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) kvm_write_guest(kvm, gfn_to_gpa(gfn),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) &hv->tsc_ref, sizeof(hv->tsc_ref.tsc_sequence));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) mutex_unlock(&kvm->arch.hyperv.hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) static int kvm_hv_set_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) struct kvm *kvm = vcpu->kvm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) struct kvm_hv *hv = &kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) switch (msr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) case HV_X64_MSR_GUEST_OS_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) hv->hv_guest_os_id = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) /* setting guest os id to zero disables hypercall page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) if (!hv->hv_guest_os_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) hv->hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) case HV_X64_MSR_HYPERCALL: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) u64 gfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) unsigned long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) u8 instructions[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) /* if guest os id is not set hypercall should remain disabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) if (!hv->hv_guest_os_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) hv->hv_hypercall = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) addr = gfn_to_hva(kvm, gfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) if (kvm_is_error_hva(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) kvm_x86_ops.patch_hypercall(vcpu, instructions);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) ((unsigned char *)instructions)[3] = 0xc3; /* ret */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) if (__copy_to_user((void __user *)addr, instructions, 4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) hv->hv_hypercall = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) mark_page_dirty(kvm, gfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) case HV_X64_MSR_REFERENCE_TSC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) hv->hv_tsc_page = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) if (hv->hv_tsc_page & HV_X64_MSR_TSC_REFERENCE_ENABLE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) kvm_make_request(KVM_REQ_MASTERCLOCK_UPDATE, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) return kvm_hv_msr_set_crash_data(vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) msr - HV_X64_MSR_CRASH_P0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) case HV_X64_MSR_CRASH_CTL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) return kvm_hv_msr_set_crash_ctl(vcpu, data, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) case HV_X64_MSR_RESET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) if (data == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) vcpu_debug(vcpu, "hyper-v reset requested\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) kvm_make_request(KVM_REQ_HV_RESET, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) hv->hv_reenlightenment_control = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) case HV_X64_MSR_TSC_EMULATION_CONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) hv->hv_tsc_emulation_control = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) case HV_X64_MSR_TSC_EMULATION_STATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) hv->hv_tsc_emulation_status = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) case HV_X64_MSR_TIME_REF_COUNT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) /* read-only, but still ignore it if host-initiated */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) if (!host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) case HV_X64_MSR_SYNDBG_OPTIONS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) return syndbg_set_msr(vcpu, msr, data, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) vcpu_unimpl(vcpu, "Hyper-V unhandled wrmsr: 0x%x data 0x%llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) msr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) /* Calculate cpu time spent by current task in 100ns units */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) static u64 current_task_runtime_100ns(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) u64 utime, stime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) task_cputime_adjusted(current, &utime, &stime);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) return div_u64(utime + stime, 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) switch (msr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) case HV_X64_MSR_VP_INDEX: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) struct kvm_hv *hv = &vcpu->kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) int vcpu_idx = kvm_vcpu_get_idx(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) u32 new_vp_index = (u32)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) if (!host || new_vp_index >= KVM_MAX_VCPUS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) if (new_vp_index == hv_vcpu->vp_index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) * The VP index is initialized to vcpu_index by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) * kvm_hv_vcpu_postcreate so they initially match. Now the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) * VP index is changing, adjust num_mismatched_vp_indexes if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) * it now matches or no longer matches vcpu_idx.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) if (hv_vcpu->vp_index == vcpu_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) atomic_inc(&hv->num_mismatched_vp_indexes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) else if (new_vp_index == vcpu_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) atomic_dec(&hv->num_mismatched_vp_indexes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) hv_vcpu->vp_index = new_vp_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) case HV_X64_MSR_VP_ASSIST_PAGE: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) u64 gfn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) unsigned long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) if (!(data & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) hv_vcpu->hv_vapic = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) if (kvm_lapic_enable_pv_eoi(vcpu, 0, 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) gfn = data >> HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) addr = kvm_vcpu_gfn_to_hva(vcpu, gfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) if (kvm_is_error_hva(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) * Clear apic_assist portion of struct hv_vp_assist_page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) * only, there can be valuable data in the rest which needs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) * to be preserved e.g. on migration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) if (__put_user(0, (u32 __user *)addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) hv_vcpu->hv_vapic = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) kvm_vcpu_mark_page_dirty(vcpu, gfn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) if (kvm_lapic_enable_pv_eoi(vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) gfn_to_gpa(gfn) | KVM_MSR_ENABLED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) sizeof(struct hv_vp_assist_page)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) case HV_X64_MSR_EOI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) case HV_X64_MSR_ICR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) case HV_X64_MSR_TPR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) case HV_X64_MSR_VP_RUNTIME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) if (!host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) hv_vcpu->runtime_offset = data - current_task_runtime_100ns();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) case HV_X64_MSR_SCONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) case HV_X64_MSR_SVERSION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) case HV_X64_MSR_SIEFP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) case HV_X64_MSR_SIMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) case HV_X64_MSR_EOM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) return synic_set_msr(vcpu_to_synic(vcpu), msr, data, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) case HV_X64_MSR_STIMER0_CONFIG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) case HV_X64_MSR_STIMER1_CONFIG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) case HV_X64_MSR_STIMER2_CONFIG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) case HV_X64_MSR_STIMER3_CONFIG: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) int timer_index = (msr - HV_X64_MSR_STIMER0_CONFIG)/2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) return stimer_set_config(vcpu_to_stimer(vcpu, timer_index),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) data, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) case HV_X64_MSR_STIMER0_COUNT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) case HV_X64_MSR_STIMER1_COUNT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) case HV_X64_MSR_STIMER2_COUNT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) case HV_X64_MSR_STIMER3_COUNT: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) int timer_index = (msr - HV_X64_MSR_STIMER0_COUNT)/2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) return stimer_set_count(vcpu_to_stimer(vcpu, timer_index),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) data, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) case HV_X64_MSR_TSC_FREQUENCY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) case HV_X64_MSR_APIC_FREQUENCY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) /* read-only, but still ignore it if host-initiated */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) if (!host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) vcpu_unimpl(vcpu, "Hyper-V unhandled wrmsr: 0x%x data 0x%llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) msr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) static int kvm_hv_get_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) u64 data = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) struct kvm *kvm = vcpu->kvm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) struct kvm_hv *hv = &kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) switch (msr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) case HV_X64_MSR_GUEST_OS_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) data = hv->hv_guest_os_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) case HV_X64_MSR_HYPERCALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) data = hv->hv_hypercall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) case HV_X64_MSR_TIME_REF_COUNT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) data = get_time_ref_counter(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) case HV_X64_MSR_REFERENCE_TSC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) data = hv->hv_tsc_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) case HV_X64_MSR_CRASH_P0 ... HV_X64_MSR_CRASH_P4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) return kvm_hv_msr_get_crash_data(vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) msr - HV_X64_MSR_CRASH_P0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) case HV_X64_MSR_CRASH_CTL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) return kvm_hv_msr_get_crash_ctl(vcpu, pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) case HV_X64_MSR_RESET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) data = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) case HV_X64_MSR_REENLIGHTENMENT_CONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) data = hv->hv_reenlightenment_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) case HV_X64_MSR_TSC_EMULATION_CONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) data = hv->hv_tsc_emulation_control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) case HV_X64_MSR_TSC_EMULATION_STATUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) data = hv->hv_tsc_emulation_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) case HV_X64_MSR_SYNDBG_OPTIONS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) case HV_X64_MSR_SYNDBG_CONTROL ... HV_X64_MSR_SYNDBG_PENDING_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) return syndbg_get_msr(vcpu, msr, pdata, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) *pdata = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) static int kvm_hv_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) u64 data = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) switch (msr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) case HV_X64_MSR_VP_INDEX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) data = hv_vcpu->vp_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) case HV_X64_MSR_EOI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) case HV_X64_MSR_ICR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) case HV_X64_MSR_TPR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) case HV_X64_MSR_VP_ASSIST_PAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) data = hv_vcpu->hv_vapic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) case HV_X64_MSR_VP_RUNTIME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) data = current_task_runtime_100ns() + hv_vcpu->runtime_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) case HV_X64_MSR_SCONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) case HV_X64_MSR_SVERSION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) case HV_X64_MSR_SIEFP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) case HV_X64_MSR_SIMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) case HV_X64_MSR_EOM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) return synic_get_msr(vcpu_to_synic(vcpu), msr, pdata, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) case HV_X64_MSR_STIMER0_CONFIG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) case HV_X64_MSR_STIMER1_CONFIG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) case HV_X64_MSR_STIMER2_CONFIG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) case HV_X64_MSR_STIMER3_CONFIG: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) int timer_index = (msr - HV_X64_MSR_STIMER0_CONFIG)/2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) return stimer_get_config(vcpu_to_stimer(vcpu, timer_index),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) case HV_X64_MSR_STIMER0_COUNT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) case HV_X64_MSR_STIMER1_COUNT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) case HV_X64_MSR_STIMER2_COUNT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) case HV_X64_MSR_STIMER3_COUNT: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) int timer_index = (msr - HV_X64_MSR_STIMER0_COUNT)/2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) return stimer_get_count(vcpu_to_stimer(vcpu, timer_index),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) case HV_X64_MSR_TSC_FREQUENCY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) data = (u64)vcpu->arch.virtual_tsc_khz * 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) case HV_X64_MSR_APIC_FREQUENCY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) data = APIC_BUS_FREQUENCY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) *pdata = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) if (kvm_hv_msr_partition_wide(msr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) mutex_lock(&vcpu->kvm->arch.hyperv.hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) r = kvm_hv_set_msr_pw(vcpu, msr, data, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) mutex_unlock(&vcpu->kvm->arch.hyperv.hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) return kvm_hv_set_msr(vcpu, msr, data, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata, bool host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) if (kvm_hv_msr_partition_wide(msr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) mutex_lock(&vcpu->kvm->arch.hyperv.hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) r = kvm_hv_get_msr_pw(vcpu, msr, pdata, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) mutex_unlock(&vcpu->kvm->arch.hyperv.hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) return kvm_hv_get_msr(vcpu, msr, pdata, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) static __always_inline unsigned long *sparse_set_to_vcpu_mask(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) struct kvm *kvm, u64 *sparse_banks, u64 valid_bank_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) u64 *vp_bitmap, unsigned long *vcpu_bitmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) struct kvm_hv *hv = &kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) struct kvm_vcpu *vcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) int i, bank, sbank = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) memset(vp_bitmap, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) KVM_HV_MAX_SPARSE_VCPU_SET_BITS * sizeof(*vp_bitmap));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) for_each_set_bit(bank, (unsigned long *)&valid_bank_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) KVM_HV_MAX_SPARSE_VCPU_SET_BITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) vp_bitmap[bank] = sparse_banks[sbank++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) if (likely(!atomic_read(&hv->num_mismatched_vp_indexes))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) /* for all vcpus vp_index == vcpu_idx */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) return (unsigned long *)vp_bitmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) bitmap_zero(vcpu_bitmap, KVM_MAX_VCPUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) kvm_for_each_vcpu(i, vcpu, kvm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) if (test_bit(vcpu_to_hv_vcpu(vcpu)->vp_index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) (unsigned long *)vp_bitmap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) __set_bit(i, vcpu_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) return vcpu_bitmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) static u64 kvm_hv_flush_tlb(struct kvm_vcpu *current_vcpu, u64 ingpa,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) u16 rep_cnt, bool ex)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) struct kvm *kvm = current_vcpu->kvm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) struct kvm_vcpu_hv *hv_vcpu = ¤t_vcpu->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) struct hv_tlb_flush_ex flush_ex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) struct hv_tlb_flush flush;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) u64 vp_bitmap[KVM_HV_MAX_SPARSE_VCPU_SET_BITS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) DECLARE_BITMAP(vcpu_bitmap, KVM_MAX_VCPUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) unsigned long *vcpu_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) u64 valid_bank_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) u64 sparse_banks[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) int sparse_banks_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) bool all_cpus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) if (!ex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) if (unlikely(kvm_read_guest(kvm, ingpa, &flush, sizeof(flush))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) return HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) trace_kvm_hv_flush_tlb(flush.processor_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) flush.address_space, flush.flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) valid_bank_mask = BIT_ULL(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) sparse_banks[0] = flush.processor_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) * Work around possible WS2012 bug: it sends hypercalls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) * with processor_mask = 0x0 and HV_FLUSH_ALL_PROCESSORS clear,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) * while also expecting us to flush something and crashing if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) * we don't. Let's treat processor_mask == 0 same as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) * HV_FLUSH_ALL_PROCESSORS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) all_cpus = (flush.flags & HV_FLUSH_ALL_PROCESSORS) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) flush.processor_mask == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) if (unlikely(kvm_read_guest(kvm, ingpa, &flush_ex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) sizeof(flush_ex))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) return HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) trace_kvm_hv_flush_tlb_ex(flush_ex.hv_vp_set.valid_bank_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) flush_ex.hv_vp_set.format,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) flush_ex.address_space,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) flush_ex.flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) valid_bank_mask = flush_ex.hv_vp_set.valid_bank_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) all_cpus = flush_ex.hv_vp_set.format !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) HV_GENERIC_SET_SPARSE_4K;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) sparse_banks_len =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) bitmap_weight((unsigned long *)&valid_bank_mask, 64) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) sizeof(sparse_banks[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) if (!sparse_banks_len && !all_cpus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) goto ret_success;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) if (!all_cpus &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) kvm_read_guest(kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) ingpa + offsetof(struct hv_tlb_flush_ex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) hv_vp_set.bank_contents),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) sparse_banks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) sparse_banks_len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) return HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) cpumask_clear(&hv_vcpu->tlb_flush);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) vcpu_mask = all_cpus ? NULL :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) sparse_set_to_vcpu_mask(kvm, sparse_banks, valid_bank_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) vp_bitmap, vcpu_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) * vcpu->arch.cr3 may not be up-to-date for running vCPUs so we can't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) * analyze it here, flush TLB regardless of the specified address space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) kvm_make_vcpus_request_mask(kvm, KVM_REQ_TLB_FLUSH_GUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) NULL, vcpu_mask, &hv_vcpu->tlb_flush);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) ret_success:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) /* We always do full TLB flush, set rep_done = rep_cnt. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) return (u64)HV_STATUS_SUCCESS |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) ((u64)rep_cnt << HV_HYPERCALL_REP_COMP_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) static void kvm_send_ipi_to_many(struct kvm *kvm, u32 vector,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) unsigned long *vcpu_bitmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) struct kvm_lapic_irq irq = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) .delivery_mode = APIC_DM_FIXED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) .vector = vector
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) struct kvm_vcpu *vcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) kvm_for_each_vcpu(i, vcpu, kvm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) if (vcpu_bitmap && !test_bit(i, vcpu_bitmap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) /* We fail only when APIC is disabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) kvm_apic_set_irq(vcpu, &irq, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) static u64 kvm_hv_send_ipi(struct kvm_vcpu *current_vcpu, u64 ingpa, u64 outgpa,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) bool ex, bool fast)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) struct kvm *kvm = current_vcpu->kvm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) struct hv_send_ipi_ex send_ipi_ex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) struct hv_send_ipi send_ipi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) u64 vp_bitmap[KVM_HV_MAX_SPARSE_VCPU_SET_BITS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) DECLARE_BITMAP(vcpu_bitmap, KVM_MAX_VCPUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) unsigned long *vcpu_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) unsigned long valid_bank_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) u64 sparse_banks[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) int sparse_banks_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) u32 vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) bool all_cpus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) if (!ex) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) if (!fast) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) if (unlikely(kvm_read_guest(kvm, ingpa, &send_ipi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) sizeof(send_ipi))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) return HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) sparse_banks[0] = send_ipi.cpu_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) vector = send_ipi.vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) /* 'reserved' part of hv_send_ipi should be 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) if (unlikely(ingpa >> 32 != 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) return HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) sparse_banks[0] = outgpa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) vector = (u32)ingpa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) all_cpus = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) valid_bank_mask = BIT_ULL(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) trace_kvm_hv_send_ipi(vector, sparse_banks[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) if (unlikely(kvm_read_guest(kvm, ingpa, &send_ipi_ex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) sizeof(send_ipi_ex))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) return HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) trace_kvm_hv_send_ipi_ex(send_ipi_ex.vector,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) send_ipi_ex.vp_set.format,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) send_ipi_ex.vp_set.valid_bank_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) vector = send_ipi_ex.vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) valid_bank_mask = send_ipi_ex.vp_set.valid_bank_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) sparse_banks_len = bitmap_weight(&valid_bank_mask, 64) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) sizeof(sparse_banks[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) all_cpus = send_ipi_ex.vp_set.format == HV_GENERIC_SET_ALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) if (all_cpus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) goto check_and_send_ipi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) if (!sparse_banks_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) goto ret_success;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) if (kvm_read_guest(kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) ingpa + offsetof(struct hv_send_ipi_ex,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) vp_set.bank_contents),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) sparse_banks,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) sparse_banks_len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) return HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) check_and_send_ipi:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) if ((vector < HV_IPI_LOW_VECTOR) || (vector > HV_IPI_HIGH_VECTOR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) return HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) vcpu_mask = all_cpus ? NULL :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) sparse_set_to_vcpu_mask(kvm, sparse_banks, valid_bank_mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) vp_bitmap, vcpu_bitmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) kvm_send_ipi_to_many(kvm, vector, vcpu_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) ret_success:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) return HV_STATUS_SUCCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) bool kvm_hv_hypercall_enabled(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) return READ_ONCE(kvm->arch.hyperv.hv_guest_os_id) != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) static void kvm_hv_hypercall_set_result(struct kvm_vcpu *vcpu, u64 result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) bool longmode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) longmode = is_64_bit_mode(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) if (longmode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) kvm_rax_write(vcpu, result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) kvm_rdx_write(vcpu, result >> 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) kvm_rax_write(vcpu, result & 0xffffffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) static int kvm_hv_hypercall_complete(struct kvm_vcpu *vcpu, u64 result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) kvm_hv_hypercall_set_result(vcpu, result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) ++vcpu->stat.hypercalls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) return kvm_skip_emulated_instruction(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) static int kvm_hv_hypercall_complete_userspace(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) return kvm_hv_hypercall_complete(vcpu, vcpu->run->hyperv.u.hcall.result);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) static u16 kvm_hvcall_signal_event(struct kvm_vcpu *vcpu, bool fast, u64 param)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) struct eventfd_ctx *eventfd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) if (unlikely(!fast)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) gpa_t gpa = param;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) if ((gpa & (__alignof__(param) - 1)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) offset_in_page(gpa) + sizeof(param) > PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) return HV_STATUS_INVALID_ALIGNMENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) ret = kvm_vcpu_read_guest(vcpu, gpa, ¶m, sizeof(param));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) return HV_STATUS_INVALID_ALIGNMENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) * Per spec, bits 32-47 contain the extra "flag number". However, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) * have no use for it, and in all known usecases it is zero, so just
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) * report lookup failure if it isn't.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) if (param & 0xffff00000000ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) return HV_STATUS_INVALID_PORT_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) /* remaining bits are reserved-zero */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) if (param & ~KVM_HYPERV_CONN_ID_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) return HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) /* the eventfd is protected by vcpu->kvm->srcu, but conn_to_evt isn't */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) eventfd = idr_find(&vcpu->kvm->arch.hyperv.conn_to_evt, param);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) if (!eventfd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) return HV_STATUS_INVALID_PORT_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) eventfd_signal(eventfd, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) return HV_STATUS_SUCCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) u64 param, ingpa, outgpa, ret = HV_STATUS_SUCCESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) uint16_t code, rep_idx, rep_cnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) bool fast, rep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751) * hypercall generates UD from non zero cpl and real mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) * per HYPER-V spec
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) if (kvm_x86_ops.get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) kvm_queue_exception(vcpu, UD_VECTOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) #ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) if (is_64_bit_mode(vcpu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) param = kvm_rcx_read(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) ingpa = kvm_rdx_read(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) outgpa = kvm_r8_read(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) param = ((u64)kvm_rdx_read(vcpu) << 32) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) (kvm_rax_read(vcpu) & 0xffffffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) ingpa = ((u64)kvm_rbx_read(vcpu) << 32) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) (kvm_rcx_read(vcpu) & 0xffffffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) outgpa = ((u64)kvm_rdi_read(vcpu) << 32) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) (kvm_rsi_read(vcpu) & 0xffffffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) code = param & 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776) fast = !!(param & HV_HYPERCALL_FAST_BIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) rep_cnt = (param >> HV_HYPERCALL_REP_COMP_OFFSET) & 0xfff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) rep_idx = (param >> HV_HYPERCALL_REP_START_OFFSET) & 0xfff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) rep = !!(rep_cnt || rep_idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) switch (code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) case HVCALL_NOTIFY_LONG_SPIN_WAIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) if (unlikely(rep)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) kvm_vcpu_on_spin(vcpu, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) case HVCALL_SIGNAL_EVENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) if (unlikely(rep)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796) ret = kvm_hvcall_signal_event(vcpu, fast, ingpa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) if (ret != HV_STATUS_INVALID_PORT_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) fallthrough; /* maybe userspace knows this conn_id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) case HVCALL_POST_MESSAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) /* don't bother userspace if it has no way to handle it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802) if (unlikely(rep || !vcpu_to_synic(vcpu)->active)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) vcpu->run->exit_reason = KVM_EXIT_HYPERV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) vcpu->run->hyperv.type = KVM_EXIT_HYPERV_HCALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) vcpu->run->hyperv.u.hcall.input = param;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) vcpu->run->hyperv.u.hcall.params[0] = ingpa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) vcpu->run->hyperv.u.hcall.params[1] = outgpa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) vcpu->arch.complete_userspace_io =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) kvm_hv_hypercall_complete_userspace;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) if (unlikely(fast || !rep_cnt || rep_idx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) ret = kvm_hv_flush_tlb(vcpu, ingpa, rep_cnt, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) if (unlikely(fast || rep)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) ret = kvm_hv_flush_tlb(vcpu, ingpa, rep_cnt, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) case HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) if (unlikely(fast || !rep_cnt || rep_idx)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) ret = kvm_hv_flush_tlb(vcpu, ingpa, rep_cnt, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) case HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) if (unlikely(fast || rep)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) ret = kvm_hv_flush_tlb(vcpu, ingpa, rep_cnt, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) case HVCALL_SEND_IPI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) if (unlikely(rep)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847) ret = kvm_hv_send_ipi(vcpu, ingpa, outgpa, false, fast);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) case HVCALL_SEND_IPI_EX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) if (unlikely(fast || rep)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) ret = HV_STATUS_INVALID_HYPERCALL_INPUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) ret = kvm_hv_send_ipi(vcpu, ingpa, outgpa, true, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) case HVCALL_POST_DEBUG_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) case HVCALL_RETRIEVE_DEBUG_DATA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) if (unlikely(fast)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) ret = HV_STATUS_INVALID_PARAMETER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) case HVCALL_RESET_DEBUG_SESSION: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) struct kvm_hv_syndbg *syndbg = vcpu_to_hv_syndbg(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) if (!kvm_hv_is_syndbg_enabled(vcpu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) ret = HV_STATUS_INVALID_HYPERCALL_CODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) if (!(syndbg->options & HV_X64_SYNDBG_OPTION_USE_HCALLS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) ret = HV_STATUS_OPERATION_DENIED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) vcpu->run->exit_reason = KVM_EXIT_HYPERV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) vcpu->run->hyperv.type = KVM_EXIT_HYPERV_HCALL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) vcpu->run->hyperv.u.hcall.input = param;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) vcpu->run->hyperv.u.hcall.params[0] = ingpa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) vcpu->run->hyperv.u.hcall.params[1] = outgpa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) vcpu->arch.complete_userspace_io =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) kvm_hv_hypercall_complete_userspace;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) ret = HV_STATUS_INVALID_HYPERCALL_CODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) return kvm_hv_hypercall_complete(vcpu, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) void kvm_hv_init_vm(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) mutex_init(&kvm->arch.hyperv.hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) idr_init(&kvm->arch.hyperv.conn_to_evt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) void kvm_hv_destroy_vm(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) struct eventfd_ctx *eventfd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) idr_for_each_entry(&kvm->arch.hyperv.conn_to_evt, eventfd, i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) eventfd_ctx_put(eventfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) idr_destroy(&kvm->arch.hyperv.conn_to_evt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) static int kvm_hv_eventfd_assign(struct kvm *kvm, u32 conn_id, int fd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) struct kvm_hv *hv = &kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) struct eventfd_ctx *eventfd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) eventfd = eventfd_ctx_fdget(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) if (IS_ERR(eventfd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) return PTR_ERR(eventfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) mutex_lock(&hv->hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) ret = idr_alloc(&hv->conn_to_evt, eventfd, conn_id, conn_id + 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) GFP_KERNEL_ACCOUNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) mutex_unlock(&hv->hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) if (ret >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) if (ret == -ENOSPC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) ret = -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) eventfd_ctx_put(eventfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) static int kvm_hv_eventfd_deassign(struct kvm *kvm, u32 conn_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934) struct kvm_hv *hv = &kvm->arch.hyperv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) struct eventfd_ctx *eventfd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) mutex_lock(&hv->hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) eventfd = idr_remove(&hv->conn_to_evt, conn_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) mutex_unlock(&hv->hv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) if (!eventfd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) synchronize_srcu(&kvm->srcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) eventfd_ctx_put(eventfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949) int kvm_vm_ioctl_hv_eventfd(struct kvm *kvm, struct kvm_hyperv_eventfd *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) if ((args->flags & ~KVM_HYPERV_EVENTFD_DEASSIGN) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) (args->conn_id & ~KVM_HYPERV_CONN_ID_MASK))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) if (args->flags == KVM_HYPERV_EVENTFD_DEASSIGN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) return kvm_hv_eventfd_deassign(kvm, args->conn_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) return kvm_hv_eventfd_assign(kvm, args->conn_id, args->fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) struct kvm_cpuid_entry2 __user *entries)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963) uint16_t evmcs_ver = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) struct kvm_cpuid_entry2 cpuid_entries[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) { .function = HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) { .function = HYPERV_CPUID_INTERFACE },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) { .function = HYPERV_CPUID_VERSION },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) { .function = HYPERV_CPUID_FEATURES },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) { .function = HYPERV_CPUID_ENLIGHTMENT_INFO },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) { .function = HYPERV_CPUID_IMPLEMENT_LIMITS },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) { .function = HYPERV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) { .function = HYPERV_CPUID_SYNDBG_INTERFACE },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) { .function = HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) { .function = HYPERV_CPUID_NESTED_FEATURES },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) int i, nent = ARRAY_SIZE(cpuid_entries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) if (kvm_x86_ops.nested_ops->get_evmcs_version)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) evmcs_ver = kvm_x86_ops.nested_ops->get_evmcs_version(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) /* Skip NESTED_FEATURES if eVMCS is not supported */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) if (!evmcs_ver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) --nent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) if (cpuid->nent < nent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) return -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) if (cpuid->nent > nent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) cpuid->nent = nent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) for (i = 0; i < nent; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) struct kvm_cpuid_entry2 *ent = &cpuid_entries[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) u32 signature[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) switch (ent->function) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) case HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) memcpy(signature, "Linux KVM Hv", 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) ent->eax = HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) ent->ebx = signature[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) ent->ecx = signature[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) ent->edx = signature[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) case HYPERV_CPUID_INTERFACE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) memcpy(signature, "Hv#1\0\0\0\0\0\0\0\0", 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) ent->eax = signature[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) case HYPERV_CPUID_VERSION:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) * We implement some Hyper-V 2016 functions so let's use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) * this version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015) ent->eax = 0x00003839;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) ent->ebx = 0x000A0000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) case HYPERV_CPUID_FEATURES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) ent->eax |= HV_MSR_VP_RUNTIME_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) ent->eax |= HV_MSR_TIME_REF_COUNT_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) ent->eax |= HV_MSR_SYNIC_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) ent->eax |= HV_MSR_SYNTIMER_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) ent->eax |= HV_MSR_APIC_ACCESS_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) ent->eax |= HV_MSR_HYPERCALL_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) ent->eax |= HV_MSR_VP_INDEX_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) ent->eax |= HV_MSR_RESET_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) ent->eax |= HV_MSR_REFERENCE_TSC_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) ent->eax |= HV_ACCESS_FREQUENCY_MSRS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) ent->eax |= HV_ACCESS_REENLIGHTENMENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) ent->ebx |= HV_POST_MESSAGES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) ent->ebx |= HV_SIGNAL_EVENTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) ent->edx |= HV_FEATURE_FREQUENCY_MSRS_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) ent->edx |= HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) ent->ebx |= HV_DEBUGGING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) ent->edx |= HV_X64_GUEST_DEBUGGING_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) ent->edx |= HV_FEATURE_DEBUG_MSRS_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) * Direct Synthetic timers only make sense with in-kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) * LAPIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) if (lapic_in_kernel(vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) ent->edx |= HV_STIMER_DIRECT_MODE_AVAILABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) case HYPERV_CPUID_ENLIGHTMENT_INFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) ent->eax |= HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) ent->eax |= HV_X64_APIC_ACCESS_RECOMMENDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) ent->eax |= HV_X64_RELAXED_TIMING_RECOMMENDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) ent->eax |= HV_X64_CLUSTER_IPI_RECOMMENDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) ent->eax |= HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) if (evmcs_ver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) ent->eax |= HV_X64_ENLIGHTENED_VMCS_RECOMMENDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) if (!cpu_smt_possible())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) ent->eax |= HV_X64_NO_NONARCH_CORESHARING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) * Default number of spinlock retry attempts, matches
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) * HyperV 2016.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) ent->ebx = 0x00000FFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) case HYPERV_CPUID_IMPLEMENT_LIMITS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) /* Maximum number of virtual processors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071) ent->eax = KVM_MAX_VCPUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) * Maximum number of logical processors, matches
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) * HyperV 2016.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) ent->ebx = 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) case HYPERV_CPUID_NESTED_FEATURES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) ent->eax = evmcs_ver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) case HYPERV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) memcpy(signature, "Linux KVM Hv", 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) ent->eax = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) ent->ebx = signature[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) ent->ecx = signature[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) ent->edx = signature[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) case HYPERV_CPUID_SYNDBG_INTERFACE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) memcpy(signature, "VS#1\0\0\0\0\0\0\0\0", 12);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) ent->eax = signature[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) case HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) ent->eax |= HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) if (copy_to_user(entries, cpuid_entries,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) nent * sizeof(struct kvm_cpuid_entry2)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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