1 // SPDX-License-Identifier: GPL-2.0
2 #include <errno.h>
3 #include <string.h>
4 #include "../../../util/kvm-stat.h"
5 #include "../../../util/evsel.h"
6 #include <asm/svm.h>
7 #include <asm/vmx.h>
8 #include <asm/kvm.h>
9
10 define_exit_reasons_table(vmx_exit_reasons, VMX_EXIT_REASONS);
11 define_exit_reasons_table(svm_exit_reasons, SVM_EXIT_REASONS);
12
13 static struct kvm_events_ops exit_events = {
14 .is_begin_event = exit_event_begin,
15 .is_end_event = exit_event_end,
16 .decode_key = exit_event_decode_key,
17 .name = "VM-EXIT"
18 };
19
20 const char *vcpu_id_str = "vcpu_id";
21 const char *kvm_exit_reason = "exit_reason";
22 const char *kvm_entry_trace = "kvm:kvm_entry";
23 const char *kvm_exit_trace = "kvm:kvm_exit";
24
25 /*
26 * For the mmio events, we treat:
27 * the time of MMIO write: kvm_mmio(KVM_TRACE_MMIO_WRITE...) -> kvm_entry
28 * the time of MMIO read: kvm_exit -> kvm_mmio(KVM_TRACE_MMIO_READ...).
29 */
30 static void mmio_event_get_key(struct evsel *evsel, struct perf_sample *sample,
31 struct event_key *key)
32 {
33 key->key = evsel__intval(evsel, sample, "gpa");
34 key->info = evsel__intval(evsel, sample, "type");
35 }
36
37 #define KVM_TRACE_MMIO_READ_UNSATISFIED 0
38 #define KVM_TRACE_MMIO_READ 1
39 #define KVM_TRACE_MMIO_WRITE 2
40
41 static bool mmio_event_begin(struct evsel *evsel,
42 struct perf_sample *sample, struct event_key *key)
43 {
44 /* MMIO read begin event in kernel. */
45 if (kvm_exit_event(evsel))
46 return true;
47
48 /* MMIO write begin event in kernel. */
49 if (evsel__name_is(evsel, "kvm:kvm_mmio") &&
50 evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_WRITE) {
51 mmio_event_get_key(evsel, sample, key);
52 return true;
53 }
54
55 return false;
56 }
57
58 static bool mmio_event_end(struct evsel *evsel, struct perf_sample *sample,
59 struct event_key *key)
60 {
61 /* MMIO write end event in kernel. */
62 if (kvm_entry_event(evsel))
63 return true;
64
65 /* MMIO read end event in kernel.*/
66 if (evsel__name_is(evsel, "kvm:kvm_mmio") &&
67 evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_READ) {
68 mmio_event_get_key(evsel, sample, key);
69 return true;
70 }
71
72 return false;
73 }
74
75 static void mmio_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
76 struct event_key *key,
77 char *decode)
78 {
79 scnprintf(decode, KVM_EVENT_NAME_LEN, "%#lx:%s",
80 (unsigned long)key->key,
81 key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R");
82 }
83
84 static struct kvm_events_ops mmio_events = {
85 .is_begin_event = mmio_event_begin,
86 .is_end_event = mmio_event_end,
87 .decode_key = mmio_event_decode_key,
88 .name = "MMIO Access"
89 };
90
91 /* The time of emulation pio access is from kvm_pio to kvm_entry. */
92 static void ioport_event_get_key(struct evsel *evsel,
93 struct perf_sample *sample,
94 struct event_key *key)
95 {
96 key->key = evsel__intval(evsel, sample, "port");
97 key->info = evsel__intval(evsel, sample, "rw");
98 }
99
100 static bool ioport_event_begin(struct evsel *evsel,
101 struct perf_sample *sample,
102 struct event_key *key)
103 {
104 if (evsel__name_is(evsel, "kvm:kvm_pio")) {
105 ioport_event_get_key(evsel, sample, key);
106 return true;
107 }
108
109 return false;
110 }
111
112 static bool ioport_event_end(struct evsel *evsel,
113 struct perf_sample *sample __maybe_unused,
114 struct event_key *key __maybe_unused)
115 {
116 return kvm_entry_event(evsel);
117 }
118
119 static void ioport_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
120 struct event_key *key,
121 char *decode)
122 {
123 scnprintf(decode, KVM_EVENT_NAME_LEN, "%#llx:%s",
124 (unsigned long long)key->key,
125 key->info ? "POUT" : "PIN");
126 }
127
128 static struct kvm_events_ops ioport_events = {
129 .is_begin_event = ioport_event_begin,
130 .is_end_event = ioport_event_end,
131 .decode_key = ioport_event_decode_key,
132 .name = "IO Port Access"
133 };
134
135 /* The time of emulation msr is from kvm_msr to kvm_entry. */
136 static void msr_event_get_key(struct evsel *evsel,
137 struct perf_sample *sample,
138 struct event_key *key)
139 {
140 key->key = evsel__intval(evsel, sample, "ecx");
141 key->info = evsel__intval(evsel, sample, "write");
142 }
143
144 static bool msr_event_begin(struct evsel *evsel,
145 struct perf_sample *sample,
146 struct event_key *key)
147 {
148 if (evsel__name_is(evsel, "kvm:kvm_msr")) {
149 msr_event_get_key(evsel, sample, key);
150 return true;
151 }
152
153 return false;
154 }
155
156 static bool msr_event_end(struct evsel *evsel,
157 struct perf_sample *sample __maybe_unused,
158 struct event_key *key __maybe_unused)
159 {
160 return kvm_entry_event(evsel);
161 }
162
163 static void msr_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
164 struct event_key *key,
165 char *decode)
166 {
167 scnprintf(decode, KVM_EVENT_NAME_LEN, "%#llx:%s",
168 (unsigned long long)key->key,
169 key->info ? "W" : "R");
170 }
171
172 static struct kvm_events_ops msr_events = {
173 .is_begin_event = msr_event_begin,
174 .is_end_event = msr_event_end,
175 .decode_key = msr_event_decode_key,
176 .name = "MSR Access"
177 };
178
179 const char *kvm_events_tp[] = {
180 "kvm:kvm_entry",
181 "kvm:kvm_exit",
182 "kvm:kvm_mmio",
183 "kvm:kvm_pio",
184 "kvm:kvm_msr",
185 NULL,
186 };
187
188 struct kvm_reg_events_ops kvm_reg_events_ops[] = {
189 { .name = "vmexit", .ops = &exit_events },
190 { .name = "mmio", .ops = &mmio_events },
191 { .name = "ioport", .ops = &ioport_events },
192 { .name = "msr", .ops = &msr_events },
193 { NULL, NULL },
194 };
195
196 const char * const kvm_skip_events[] = {
197 "HLT",
198 NULL,
199 };
200
201 int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid)
202 {
203 if (strstr(cpuid, "Intel")) {
204 kvm->exit_reasons = vmx_exit_reasons;
205 kvm->exit_reasons_isa = "VMX";
206 } else if (strstr(cpuid, "AMD") || strstr(cpuid, "Hygon")) {
207 kvm->exit_reasons = svm_exit_reasons;
208 kvm->exit_reasons_isa = "SVM";
209 } else
210 return -ENOTSUP;
211
212 return 0;
213 }
214
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