Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Kernel-based Virtual Machine driver for Linux
4 *
5 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
6 */
7#include <linux/kvm_host.h>
8#include <linux/debugfs.h>
9#include "lapic.h"
10
11static int vcpu_get_timer_advance_ns(void *data, u64 *val)
12{
13 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
14 *val = vcpu->arch.apic->lapic_timer.timer_advance_ns;
15 return 0;
16}
17
18DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n");
19
20static int vcpu_get_guest_mode(void *data, u64 *val)
21{
22 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
23 *val = vcpu->stat.guest_mode;
24 return 0;
25}
26
27DEFINE_SIMPLE_ATTRIBUTE(vcpu_guest_mode_fops, vcpu_get_guest_mode, NULL, "%lld\n");
28
29static int vcpu_get_tsc_offset(void *data, u64 *val)
30{
31 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
32 *val = vcpu->arch.tsc_offset;
33 return 0;
34}
35
36DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n");
37
38static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
39{
40 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
41 *val = vcpu->arch.tsc_scaling_ratio;
42 return 0;
43}
44
45DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
46
47static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
48{
49 *val = kvm_tsc_scaling_ratio_frac_bits;
50 return 0;
51}
52
53DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
54
55void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry)
56{
57 debugfs_create_file("guest_mode", 0444, debugfs_dentry, vcpu,
58 &vcpu_guest_mode_fops);
59 debugfs_create_file("tsc-offset", 0444, debugfs_dentry, vcpu,
60 &vcpu_tsc_offset_fops);
61
62 if (lapic_in_kernel(vcpu))
63 debugfs_create_file("lapic_timer_advance_ns", 0444,
64 debugfs_dentry, vcpu,
65 &vcpu_timer_advance_ns_fops);
66
67 if (kvm_has_tsc_control) {
68 debugfs_create_file("tsc-scaling-ratio", 0444,
69 debugfs_dentry, vcpu,
70 &vcpu_tsc_scaling_fops);
71 debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
72 debugfs_dentry, vcpu,
73 &vcpu_tsc_scaling_frac_fops);
74 }
75}