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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 ret = -ENOMEM;
99 memset(log, 0, sizeof(log));
100 for (i = 0; i < KVM_NR_PAGE_SIZES; i++) {
101 log[i] = kcalloc(RMAP_LOG_SIZE, sizeof(unsigned int), GFP_KERNEL);
102 if (!log[i])
103 goto out;
104 }
105
106 mutex_lock(&kvm->slots_lock);
107 write_lock(&kvm->mmu_lock);
108
109 for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) {
110 slots = __kvm_memslots(kvm, i);
111 for (j = 0; j < slots->used_slots; j++) {
112 slot = &slots->memslots[j];
113 for (k = 0; k < KVM_NR_PAGE_SIZES; k++) {
114 rmap = slot->arch.rmap[k];
115 lpage_size = kvm_mmu_slot_lpages(slot, k + 1);
116 cur = log[k];
117 for (l = 0; l < lpage_size; l++) {
118 index = ffs(pte_list_count(&rmap[l]));
119 if (WARN_ON_ONCE(index >= RMAP_LOG_SIZE))
120 index = RMAP_LOG_SIZE - 1;
121 cur[index]++;
122 }
123 }
124 }
125 }
126
127 write_unlock(&kvm->mmu_lock);
128 mutex_unlock(&kvm->slots_lock);
129
130
131 seq_printf(m, "Rmap_Count:\t0\t1\t");
132 for (i = 2; i < RMAP_LOG_SIZE; i++) {
133 j = 1 << (i - 1);
134 k = (1 << i) - 1;
135 seq_printf(m, "%d-%d\t", j, k);
136 }
137 seq_printf(m, "\n");
138
139 for (i = 0; i < KVM_NR_PAGE_SIZES; i++) {
140 seq_printf(m, "Level=%s:\t", kvm_lpage_str[i]);
141 cur = log[i];
142 for (j = 0; j < RMAP_LOG_SIZE; j++)
143 seq_printf(m, "%d\t", cur[j]);
144 seq_printf(m, "\n");
145 }
146
147 ret = 0;
148out:
149 for (i = 0; i < KVM_NR_PAGE_SIZES; i++)
150 kfree(log[i]);
151
152 return ret;
153}
154
155static int kvm_mmu_rmaps_stat_open(struct inode *inode, struct file *file)
156{
157 struct kvm *kvm = inode->i_private;
158
159 if (!kvm_get_kvm_safe(kvm))
160 return -ENOENT;
161
162 return single_open(file, kvm_mmu_rmaps_stat_show, kvm);
163}
164
165static int kvm_mmu_rmaps_stat_release(struct inode *inode, struct file *file)
166{
167 struct kvm *kvm = inode->i_private;
168
169 kvm_put_kvm(kvm);
170
171 return single_release(inode, file);
172}
173
174static const struct file_operations mmu_rmaps_stat_fops = {
175 .open = kvm_mmu_rmaps_stat_open,
176 .read = seq_read,
177 .llseek = seq_lseek,
178 .release = kvm_mmu_rmaps_stat_release,
179};
180
181int kvm_arch_create_vm_debugfs(struct kvm *kvm)
182{
183 debugfs_create_file("mmu_rmaps_stat", 0644, kvm->debugfs_dentry, kvm,
184 &mmu_rmaps_stat_fops);
185 return 0;
186}
187
