1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* Kernel-based Virtual Machine driver for Linux
*
* Copyright 2016 Red Hat, Inc. and/or its affiliates.
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#include <linux/kvm_host.h>
#include <linux/debugfs.h>
bool kvm_arch_has_vcpu_debugfs(void)
{
return true;
}
static int vcpu_get_tsc_offset(void *data, u64 *val)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
*val = vcpu->arch.tsc_offset;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n");
static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
{
struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
*val = vcpu->arch.tsc_scaling_ratio;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
{
*val = kvm_tsc_scaling_ratio_frac_bits;
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
{
struct dentry *ret;
ret = debugfs_create_file("tsc-offset", 0444,
vcpu->debugfs_dentry,
vcpu, &vcpu_tsc_offset_fops);
if (!ret)
return -ENOMEM;
if (kvm_has_tsc_control) {
ret = debugfs_create_file("tsc-scaling-ratio", 0444,
vcpu->debugfs_dentry,
vcpu, &vcpu_tsc_scaling_fops);
if (!ret)
return -ENOMEM;
ret = debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
vcpu->debugfs_dentry,
vcpu, &vcpu_tsc_scaling_frac_fops);
if (!ret)
return -ENOMEM;
}
return 0;
}
|
