Orange Pi5 kernel

^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)  * irqchip.c: Common API for in kernel interrupt controllers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (c) 2007, Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright 2010 Red Hat, Inc. and/or its affiliates.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (c) 2013, Alexander Graf <agraf@suse.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * This file is derived from virt/kvm/irq_comm.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *   Yaozu (Eddie) Dong <Eddie.dong@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  *   Alexander Graf <agraf@suse.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/kvm_host.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/srcu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <trace/events/kvm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include "irq.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) int kvm_irq_map_gsi(struct kvm *kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 		    struct kvm_kernel_irq_routing_entry *entries, int gsi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	struct kvm_irq_routing_table *irq_rt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	struct kvm_kernel_irq_routing_entry *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	int n = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	irq_rt = srcu_dereference_check(kvm->irq_routing, &kvm->irq_srcu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 					lockdep_is_held(&kvm->irq_lock));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (irq_rt && gsi < irq_rt->nr_rt_entries) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		hlist_for_each_entry(e, &irq_rt->map[gsi], link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 			entries[n] = *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 			++n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	return n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	struct kvm_irq_routing_table *irq_rt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	return irq_rt->chip[irqchip][pin];
^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) int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	struct kvm_kernel_irq_routing_entry route;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	if (!irqchip_in_kernel(kvm) || (msi->flags & ~KVM_MSI_VALID_DEVID))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	route.msi.address_lo = msi->address_lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	route.msi.address_hi = msi->address_hi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	route.msi.data = msi->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	route.msi.flags = msi->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	route.msi.devid = msi->devid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	return kvm_set_msi(&route, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)  * Return value:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)  *  < 0   Interrupt was ignored (masked or not delivered for other reasons)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68)  *  = 0   Interrupt was coalesced (previous irq is still pending)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)  *  > 0   Number of CPUs interrupt was delivered to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		bool line_status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct kvm_kernel_irq_routing_entry irq_set[KVM_NR_IRQCHIPS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	int ret = -1, i, idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	trace_kvm_set_irq(irq, level, irq_source_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	/* Not possible to detect if the guest uses the PIC or the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	 * IOAPIC.  So set the bit in both. The guest will ignore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	 * writes to the unused one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	idx = srcu_read_lock(&kvm->irq_srcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	i = kvm_irq_map_gsi(kvm, irq_set, irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	srcu_read_unlock(&kvm->irq_srcu, idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	while (i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		r = irq_set[i].set(&irq_set[i], kvm, irq_source_id, level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 				   line_status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		if (r < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		ret = r + ((ret < 0) ? 0 : ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	return ret;
^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 void free_irq_routing_table(struct kvm_irq_routing_table *rt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	if (!rt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	for (i = 0; i < rt->nr_rt_entries; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		struct kvm_kernel_irq_routing_entry *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		struct hlist_node *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		hlist_for_each_entry_safe(e, n, &rt->map[i], link) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 			hlist_del(&e->link);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 			kfree(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	kfree(rt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) void kvm_free_irq_routing(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	/* Called only during vm destruction. Nobody can use the pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	   at this stage */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	struct kvm_irq_routing_table *rt = rcu_access_pointer(kvm->irq_routing);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	free_irq_routing_table(rt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static int setup_routing_entry(struct kvm *kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			       struct kvm_irq_routing_table *rt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			       struct kvm_kernel_irq_routing_entry *e,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			       const struct kvm_irq_routing_entry *ue)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	struct kvm_kernel_irq_routing_entry *ei;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	u32 gsi = array_index_nospec(ue->gsi, KVM_MAX_IRQ_ROUTES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	 * Do not allow GSI to be mapped to the same irqchip more than once.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	 * Allow only one to one mapping between GSI and non-irqchip routing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	hlist_for_each_entry(ei, &rt->map[gsi], link)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		if (ei->type != KVM_IRQ_ROUTING_IRQCHIP ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		    ue->type != KVM_IRQ_ROUTING_IRQCHIP ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		    ue->u.irqchip.irqchip == ei->irqchip.irqchip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	e->gsi = gsi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	e->type = ue->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	r = kvm_set_routing_entry(kvm, e, ue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	if (r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	if (e->type == KVM_IRQ_ROUTING_IRQCHIP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		rt->chip[e->irqchip.irqchip][e->irqchip.pin] = e->gsi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	hlist_add_head(&e->link, &rt->map[e->gsi]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) void __attribute__((weak)) kvm_arch_irq_routing_update(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^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) bool __weak kvm_arch_can_set_irq_routing(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int kvm_set_irq_routing(struct kvm *kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			const struct kvm_irq_routing_entry *ue,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			unsigned nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			unsigned flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	struct kvm_irq_routing_table *new, *old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	struct kvm_kernel_irq_routing_entry *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	u32 i, j, nr_rt_entries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	for (i = 0; i < nr; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		if (ue[i].gsi >= KVM_MAX_IRQ_ROUTES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		nr_rt_entries = max(nr_rt_entries, ue[i].gsi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	nr_rt_entries += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	new = kzalloc(struct_size(new, map, nr_rt_entries), GFP_KERNEL_ACCOUNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	if (!new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	new->nr_rt_entries = nr_rt_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	for (i = 0; i < KVM_NR_IRQCHIPS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		for (j = 0; j < KVM_IRQCHIP_NUM_PINS; j++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 			new->chip[i][j] = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	for (i = 0; i < nr; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		r = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		e = kzalloc(sizeof(*e), GFP_KERNEL_ACCOUNT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		if (!e)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		r = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		switch (ue->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		case KVM_IRQ_ROUTING_MSI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			if (ue->flags & ~KVM_MSI_VALID_DEVID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 				goto free_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			if (ue->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 				goto free_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		r = setup_routing_entry(kvm, new, e, ue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		if (r)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			goto free_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		++ue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	mutex_lock(&kvm->irq_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	old = rcu_dereference_protected(kvm->irq_routing, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	rcu_assign_pointer(kvm->irq_routing, new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	kvm_irq_routing_update(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	kvm_arch_irq_routing_update(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	mutex_unlock(&kvm->irq_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	kvm_arch_post_irq_routing_update(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	synchronize_srcu_expedited(&kvm->irq_srcu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	new = old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	r = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) free_entry:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	kfree(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	free_irq_routing_table(new);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) }