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)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright IBM Corp. 2008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/kvm_host.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <asm/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <asm-generic/div64.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include "timing.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	/* Take a lock to avoid concurrent updates */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	mutex_lock(&vcpu->arch.exit_timing_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	vcpu->arch.last_exit_type = 0xDEAD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	for (i = 0; i < __NUMBER_OF_KVM_EXIT_TYPES; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		vcpu->arch.timing_count_type[i] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		vcpu->arch.timing_max_duration[i] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		vcpu->arch.timing_min_duration[i] = 0xFFFFFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		vcpu->arch.timing_sum_duration[i] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		vcpu->arch.timing_sum_quad_duration[i] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	vcpu->arch.timing_last_exit = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	vcpu->arch.timing_exit.tv64 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	vcpu->arch.timing_last_enter.tv64 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	mutex_unlock(&vcpu->arch.exit_timing_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) static void add_exit_timing(struct kvm_vcpu *vcpu, u64 duration, int type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	u64 old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	mutex_lock(&vcpu->arch.exit_timing_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	vcpu->arch.timing_count_type[type]++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	/* sum */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	old = vcpu->arch.timing_sum_duration[type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	vcpu->arch.timing_sum_duration[type] += duration;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	if (unlikely(old > vcpu->arch.timing_sum_duration[type])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		printk(KERN_ERR"%s - wrap adding sum of durations"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 			" old %lld new %lld type %d exit # of type %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 			__func__, old, vcpu->arch.timing_sum_duration[type],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 			type, vcpu->arch.timing_count_type[type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	/* square sum */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	old = vcpu->arch.timing_sum_quad_duration[type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	vcpu->arch.timing_sum_quad_duration[type] += (duration*duration);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	if (unlikely(old > vcpu->arch.timing_sum_quad_duration[type])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		printk(KERN_ERR"%s - wrap adding sum of squared durations"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 			" old %lld new %lld type %d exit # of type %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 			__func__, old,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 			vcpu->arch.timing_sum_quad_duration[type],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 			type, vcpu->arch.timing_count_type[type]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	/* set min/max */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	if (unlikely(duration < vcpu->arch.timing_min_duration[type]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		vcpu->arch.timing_min_duration[type] = duration;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	if (unlikely(duration > vcpu->arch.timing_max_duration[type]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		vcpu->arch.timing_max_duration[type] = duration;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	mutex_unlock(&vcpu->arch.exit_timing_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	u64 exit = vcpu->arch.timing_last_exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	u64 enter = vcpu->arch.timing_last_enter.tv64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	/* save exit time, used next exit when the reenter time is known */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	vcpu->arch.timing_last_exit = vcpu->arch.timing_exit.tv64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	if (unlikely(vcpu->arch.last_exit_type == 0xDEAD || exit == 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		return; /* skip incomplete cycle (e.g. after reset) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	/* update statistics for average and standard deviation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	add_exit_timing(vcpu, (enter - exit), vcpu->arch.last_exit_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	/* enter -> timing_last_exit is time spent in guest - log this too */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	add_exit_timing(vcpu, (vcpu->arch.timing_last_exit - enter),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			TIMEINGUEST);
^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 const char *kvm_exit_names[__NUMBER_OF_KVM_EXIT_TYPES] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	[MMIO_EXITS] =              "MMIO",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	[SIGNAL_EXITS] =            "SIGNAL",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	[ITLB_REAL_MISS_EXITS] =    "ITLBREAL",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	[ITLB_VIRT_MISS_EXITS] =    "ITLBVIRT",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	[DTLB_REAL_MISS_EXITS] =    "DTLBREAL",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	[DTLB_VIRT_MISS_EXITS] =    "DTLBVIRT",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	[SYSCALL_EXITS] =           "SYSCALL",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	[ISI_EXITS] =               "ISI",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	[DSI_EXITS] =               "DSI",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	[EMULATED_INST_EXITS] =     "EMULINST",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	[EMULATED_MTMSRWE_EXITS] =  "EMUL_WAIT",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	[EMULATED_WRTEE_EXITS] =    "EMUL_WRTEE",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	[EMULATED_MTSPR_EXITS] =    "EMUL_MTSPR",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	[EMULATED_MFSPR_EXITS] =    "EMUL_MFSPR",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	[EMULATED_MTMSR_EXITS] =    "EMUL_MTMSR",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	[EMULATED_MFMSR_EXITS] =    "EMUL_MFMSR",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	[EMULATED_TLBSX_EXITS] =    "EMUL_TLBSX",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	[EMULATED_TLBWE_EXITS] =    "EMUL_TLBWE",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	[EMULATED_RFI_EXITS] =      "EMUL_RFI",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	[DEC_EXITS] =               "DEC",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	[EXT_INTR_EXITS] =          "EXTINT",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	[HALT_WAKEUP] =             "HALT",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	[USR_PR_INST] =             "USR_PR_INST",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	[FP_UNAVAIL] =              "FP_UNAVAIL",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	[DEBUG_EXITS] =             "DEBUG",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	[TIMEINGUEST] =             "TIMEINGUEST"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) static int kvmppc_exit_timing_show(struct seq_file *m, void *private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	struct kvm_vcpu *vcpu = m->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	u64 min, max, sum, sum_quad;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	seq_puts(m, "type	count	min	max	sum	sum_squared\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	for (i = 0; i < __NUMBER_OF_KVM_EXIT_TYPES; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		min = vcpu->arch.timing_min_duration[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		do_div(min, tb_ticks_per_usec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		max = vcpu->arch.timing_max_duration[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		do_div(max, tb_ticks_per_usec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		sum = vcpu->arch.timing_sum_duration[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		do_div(sum, tb_ticks_per_usec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		sum_quad = vcpu->arch.timing_sum_quad_duration[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		do_div(sum_quad, tb_ticks_per_usec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		seq_printf(m, "%12s	%10d	%10lld	%10lld	%20lld	%20lld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			kvm_exit_names[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			vcpu->arch.timing_count_type[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 			min,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			max,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 			sum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 			sum_quad);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^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) /* Write 'c' to clear the timing statistics. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static ssize_t kvmppc_exit_timing_write(struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 				       const char __user *user_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 				       size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	int err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	char c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	if (count > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	if (get_user(c, user_buf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		err = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (c == 'c') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		struct seq_file *seqf = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		struct kvm_vcpu *vcpu = seqf->private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		/* Write does not affect our buffers previously generated with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		 * show. seq_file is locked here to prevent races of init with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		 * a show call */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		mutex_lock(&seqf->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		kvmppc_init_timing_stats(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		mutex_unlock(&seqf->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		err = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static int kvmppc_exit_timing_open(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	return single_open(file, kvmppc_exit_timing_show, inode->i_private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) static const struct file_operations kvmppc_exit_timing_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	.owner   = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	.open    = kvmppc_exit_timing_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	.read    = seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	.write   = kvmppc_exit_timing_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	.llseek  = seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	.release = single_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) void kvmppc_create_vcpu_debugfs(struct kvm_vcpu *vcpu, unsigned int id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	static char dbg_fname[50];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	struct dentry *debugfs_file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	snprintf(dbg_fname, sizeof(dbg_fname), "vm%u_vcpu%u_timing",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		 current->pid, id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	debugfs_file = debugfs_create_file(dbg_fname, 0666, kvm_debugfs_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 						vcpu, &kvmppc_exit_timing_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	vcpu->arch.debugfs_exit_timing = debugfs_file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) void kvmppc_remove_vcpu_debugfs(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	debugfs_remove(vcpu->arch.debugfs_exit_timing);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	vcpu->arch.debugfs_exit_timing = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }