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7#include <linux/kvm_host.h>
8#include <linux/debugfs.h>
9#include "lapic.h"
10#include "mmu.h"
11#include "mmu/mmu_internal.h"
12
13static int vcpu_get_timer_advance_ns(void *data, u64 *val)
14{
15 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
16 *val = vcpu->arch.apic->lapic_timer.timer_advance_ns;
17 return 0;
18}
19
20DEFINE_SIMPLE_ATTRIBUTE(vcpu_timer_advance_ns_fops, vcpu_get_timer_advance_ns, NULL, "%llu\n");
21
22static int vcpu_get_guest_mode(void *data, u64 *val)
23{
24 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
25 *val = vcpu->stat.guest_mode;
26 return 0;
27}
28
29DEFINE_SIMPLE_ATTRIBUTE(vcpu_guest_mode_fops, vcpu_get_guest_mode, NULL, "%lld\n");
30
31static int vcpu_get_tsc_offset(void *data, u64 *val)
32{
33 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
34 *val = vcpu->arch.tsc_offset;
35 return 0;
36}
37
38DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_offset_fops, vcpu_get_tsc_offset, NULL, "%lld\n");
39
40static int vcpu_get_tsc_scaling_ratio(void *data, u64 *val)
41{
42 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) data;
43 *val = vcpu->arch.tsc_scaling_ratio;
44 return 0;
45}
46
47DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_fops, vcpu_get_tsc_scaling_ratio, NULL, "%llu\n");
48
49static int vcpu_get_tsc_scaling_frac_bits(void *data, u64 *val)
50{
51 *val = kvm_tsc_scaling_ratio_frac_bits;
52 return 0;
53}
54
55DEFINE_SIMPLE_ATTRIBUTE(vcpu_tsc_scaling_frac_fops, vcpu_get_tsc_scaling_frac_bits, NULL, "%llu\n");
56
57void kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry)
58{
59 debugfs_create_file("guest_mode", 0444, debugfs_dentry, vcpu,
60 &vcpu_guest_mode_fops);
61 debugfs_create_file("tsc-offset", 0444, debugfs_dentry, vcpu,
62 &vcpu_tsc_offset_fops);
63
64 if (lapic_in_kernel(vcpu))
65 debugfs_create_file("lapic_timer_advance_ns", 0444,
66 debugfs_dentry, vcpu,
67 &vcpu_timer_advance_ns_fops);
68
69 if (kvm_has_tsc_control) {
70 debugfs_create_file("tsc-scaling-ratio", 0444,
71 debugfs_dentry, vcpu,
72 &vcpu_tsc_scaling_fops);
73 debugfs_create_file("tsc-scaling-ratio-frac-bits", 0444,
74 debugfs_dentry, vcpu,
75 &vcpu_tsc_scaling_frac_fops);
76 }
77}
78
79
80
81
82
83#define RMAP_LOG_SIZE 11
84
85static const char *kvm_lpage_str[KVM_NR_PAGE_SIZES] = { "4K", "2M", "1G" };
86
87static int kvm_mmu_rmaps_stat_show(struct seq_file *m, void *v)
88{
89 struct kvm_rmap_head *rmap;
90 struct kvm *kvm = m->private;
91 struct kvm_memory_slot *slot;
92 struct kvm_memslots *slots;
93 unsigned int lpage_size, index;
94
95 unsigned int *log[KVM_NR_PAGE_SIZES], *cur;
96 int i, j, k, l, ret;
97
98 if (!kvm_memslots_have_rmaps(kvm))
99 return 0;
100
101 ret = -ENOMEM;
102 memset(log, 0, sizeof(log));
103 for (i = 0; i < KVM_NR_PAGE_SIZES; i++) {
104 log[i] = kcalloc(RMAP_LOG_SIZE, sizeof(unsigned int), GFP_KERNEL);
105 if (!log[i])
106 goto out;
107 }
108
109 mutex_lock(&kvm->slots_lock);
110 write_lock(&kvm->mmu_lock);
111
112 for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) {
113 int bkt;
114
115 slots = __kvm_memslots(kvm, i);
116 kvm_for_each_memslot(slot, bkt, slots)
117 for (k = 0; k < KVM_NR_PAGE_SIZES; k++) {
118 rmap = slot->arch.rmap[k];
119 lpage_size = kvm_mmu_slot_lpages(slot, k + 1);
120 cur = log[k];
121 for (l = 0; l < lpage_size; l++) {
122 index = ffs(pte_list_count(&rmap[l]));
123 if (WARN_ON_ONCE(index >= RMAP_LOG_SIZE))
124 index = RMAP_LOG_SIZE - 1;
125 cur[index]++;
126 }
127 }
128 }
129
130 write_unlock(&kvm->mmu_lock);
131 mutex_unlock(&kvm->slots_lock);
132
133
134 seq_printf(m, "Rmap_Count:\t0\t1\t");
135 for (i = 2; i < RMAP_LOG_SIZE; i++) {
136 j = 1 << (i - 1);
137 k = (1 << i) - 1;
138 seq_printf(m, "%d-%d\t", j, k);
139 }
140 seq_printf(m, "\n");
141
142 for (i = 0; i < KVM_NR_PAGE_SIZES; i++) {
143 seq_printf(m, "Level=%s:\t", kvm_lpage_str[i]);
144 cur = log[i];
145 for (j = 0; j < RMAP_LOG_SIZE; j++)
146 seq_printf(m, "%d\t", cur[j]);
147 seq_printf(m, "\n");
148 }
149
150 ret = 0;
151out:
152 for (i = 0; i < KVM_NR_PAGE_SIZES; i++)
153 kfree(log[i]);
154
155 return ret;
156}
157
158static int kvm_mmu_rmaps_stat_open(struct inode *inode, struct file *file)
159{
160 struct kvm *kvm = inode->i_private;
161
162 if (!kvm_get_kvm_safe(kvm))
163 return -ENOENT;
164
165 return single_open(file, kvm_mmu_rmaps_stat_show, kvm);
166}
167
168static int kvm_mmu_rmaps_stat_release(struct inode *inode, struct file *file)
169{
170 struct kvm *kvm = inode->i_private;
171
172 kvm_put_kvm(kvm);
173
174 return single_release(inode, file);
175}
176
177static const struct file_operations mmu_rmaps_stat_fops = {
178 .open = kvm_mmu_rmaps_stat_open,
179 .read = seq_read,
180 .llseek = seq_lseek,
181 .release = kvm_mmu_rmaps_stat_release,
182};
183
184int kvm_arch_create_vm_debugfs(struct kvm *kvm)
185{
186 debugfs_create_file("mmu_rmaps_stat", 0644, kvm->debugfs_dentry, kvm,
187 &mmu_rmaps_stat_fops);
188 return 0;
189}
190
