1 // SPDX-License-Identifier: GPL-2.0-only
3 * Kernel-based Virtual Machine driver for Linux
5 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
7 #include <linux/kvm_host.h>
8 #include <linux/debugfs.h>
11 bool kvm_arch_has_vcpu_debugfs(void)
16 static int vcpu_get_timer_advance_ns(void *data
, u64
*val
)
18 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*) data
;
19 *val
= vcpu
->arch
.apic
->lapic_timer
.timer_advance_ns
;
23 DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops
, vcpu_get_timer_advance_ns
, NULL
, "%llu\n");
25 static int vcpu_get_tsc_offset(void *data
, u64
*val
)
27 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*) data
;
28 *val
= vcpu
->arch
.tsc_offset
;
32 DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops
, vcpu_get_tsc_offset
, NULL
, "%lld\n");
34 static int vcpu_get_tsc_scaling_ratio(void *data
, u64
*val
)
36 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*) data
;
37 *val
= vcpu
->arch
.tsc_scaling_ratio
;
41 DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops
, vcpu_get_tsc_scaling_ratio
, NULL
, "%llu\n");
43 static int vcpu_get_tsc_scaling_frac_bits(void *data
, u64
*val
)
45 *val
= kvm_tsc_scaling_ratio_frac_bits
;
49 DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops
, vcpu_get_tsc_scaling_frac_bits
, NULL
, "%llu\n");
51 int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu
*vcpu
)
55 ret
= debugfs_create_file("tsc-offset", 0444,
57 vcpu
, &vcpu_tsc_offset_fops
);
61 if (lapic_in_kernel(vcpu
)) {
62 ret
= debugfs_create_file("lapic_timer_advance_ns", 0444,
64 vcpu
, &vcpu_timer_advance_ns_fops
);
69 if (kvm_has_tsc_control
) {
70 ret
= debugfs_create_file("tsc-scaling-ratio", 0444,
72 vcpu
, &vcpu_tsc_scaling_fops
);
75 ret
= debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
77 vcpu
, &vcpu_tsc_scaling_frac_fops
);