Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | #include "../../util/kvm-stat.h" |
| 2 | #include <asm/kvm_perf.h> |
| 3 | |
| 4 | define_exit_reasons_table(vmx_exit_reasons, VMX_EXIT_REASONS); |
| 5 | define_exit_reasons_table(svm_exit_reasons, SVM_EXIT_REASONS); |
| 6 | |
| 7 | static struct kvm_events_ops exit_events = { |
| 8 | .is_begin_event = exit_event_begin, |
| 9 | .is_end_event = exit_event_end, |
| 10 | .decode_key = exit_event_decode_key, |
| 11 | .name = "VM-EXIT" |
| 12 | }; |
| 13 | |
| 14 | /* |
| 15 | * For the mmio events, we treat: |
| 16 | * the time of MMIO write: kvm_mmio(KVM_TRACE_MMIO_WRITE...) -> kvm_entry |
| 17 | * the time of MMIO read: kvm_exit -> kvm_mmio(KVM_TRACE_MMIO_READ...). |
| 18 | */ |
| 19 | static void mmio_event_get_key(struct perf_evsel *evsel, struct perf_sample *sample, |
| 20 | struct event_key *key) |
| 21 | { |
| 22 | key->key = perf_evsel__intval(evsel, sample, "gpa"); |
| 23 | key->info = perf_evsel__intval(evsel, sample, "type"); |
| 24 | } |
| 25 | |
| 26 | #define KVM_TRACE_MMIO_READ_UNSATISFIED 0 |
| 27 | #define KVM_TRACE_MMIO_READ 1 |
| 28 | #define KVM_TRACE_MMIO_WRITE 2 |
| 29 | |
| 30 | static bool mmio_event_begin(struct perf_evsel *evsel, |
| 31 | struct perf_sample *sample, struct event_key *key) |
| 32 | { |
| 33 | /* MMIO read begin event in kernel. */ |
| 34 | if (kvm_exit_event(evsel)) |
| 35 | return true; |
| 36 | |
| 37 | /* MMIO write begin event in kernel. */ |
| 38 | if (!strcmp(evsel->name, "kvm:kvm_mmio") && |
| 39 | perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_WRITE) { |
| 40 | mmio_event_get_key(evsel, sample, key); |
| 41 | return true; |
| 42 | } |
| 43 | |
| 44 | return false; |
| 45 | } |
| 46 | |
| 47 | static bool mmio_event_end(struct perf_evsel *evsel, struct perf_sample *sample, |
| 48 | struct event_key *key) |
| 49 | { |
| 50 | /* MMIO write end event in kernel. */ |
| 51 | if (kvm_entry_event(evsel)) |
| 52 | return true; |
| 53 | |
| 54 | /* MMIO read end event in kernel.*/ |
| 55 | if (!strcmp(evsel->name, "kvm:kvm_mmio") && |
| 56 | perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_READ) { |
| 57 | mmio_event_get_key(evsel, sample, key); |
| 58 | return true; |
| 59 | } |
| 60 | |
| 61 | return false; |
| 62 | } |
| 63 | |
| 64 | static void mmio_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused, |
| 65 | struct event_key *key, |
| 66 | char *decode) |
| 67 | { |
| 68 | scnprintf(decode, DECODE_STR_LEN, "%#lx:%s", |
| 69 | (unsigned long)key->key, |
| 70 | key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R"); |
| 71 | } |
| 72 | |
| 73 | static struct kvm_events_ops mmio_events = { |
| 74 | .is_begin_event = mmio_event_begin, |
| 75 | .is_end_event = mmio_event_end, |
| 76 | .decode_key = mmio_event_decode_key, |
| 77 | .name = "MMIO Access" |
| 78 | }; |
| 79 | |
| 80 | /* The time of emulation pio access is from kvm_pio to kvm_entry. */ |
| 81 | static void ioport_event_get_key(struct perf_evsel *evsel, |
| 82 | struct perf_sample *sample, |
| 83 | struct event_key *key) |
| 84 | { |
| 85 | key->key = perf_evsel__intval(evsel, sample, "port"); |
| 86 | key->info = perf_evsel__intval(evsel, sample, "rw"); |
| 87 | } |
| 88 | |
| 89 | static bool ioport_event_begin(struct perf_evsel *evsel, |
| 90 | struct perf_sample *sample, |
| 91 | struct event_key *key) |
| 92 | { |
| 93 | if (!strcmp(evsel->name, "kvm:kvm_pio")) { |
| 94 | ioport_event_get_key(evsel, sample, key); |
| 95 | return true; |
| 96 | } |
| 97 | |
| 98 | return false; |
| 99 | } |
| 100 | |
| 101 | static bool ioport_event_end(struct perf_evsel *evsel, |
| 102 | struct perf_sample *sample __maybe_unused, |
| 103 | struct event_key *key __maybe_unused) |
| 104 | { |
| 105 | return kvm_entry_event(evsel); |
| 106 | } |
| 107 | |
| 108 | static void ioport_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused, |
| 109 | struct event_key *key, |
| 110 | char *decode) |
| 111 | { |
| 112 | scnprintf(decode, DECODE_STR_LEN, "%#llx:%s", |
| 113 | (unsigned long long)key->key, |
| 114 | key->info ? "POUT" : "PIN"); |
| 115 | } |
| 116 | |
| 117 | static struct kvm_events_ops ioport_events = { |
| 118 | .is_begin_event = ioport_event_begin, |
| 119 | .is_end_event = ioport_event_end, |
| 120 | .decode_key = ioport_event_decode_key, |
| 121 | .name = "IO Port Access" |
| 122 | }; |
| 123 | |
| 124 | const char * const kvm_events_tp[] = { |
| 125 | "kvm:kvm_entry", |
| 126 | "kvm:kvm_exit", |
| 127 | "kvm:kvm_mmio", |
| 128 | "kvm:kvm_pio", |
| 129 | NULL, |
| 130 | }; |
| 131 | |
| 132 | struct kvm_reg_events_ops kvm_reg_events_ops[] = { |
| 133 | { .name = "vmexit", .ops = &exit_events }, |
| 134 | { .name = "mmio", .ops = &mmio_events }, |
| 135 | { .name = "ioport", .ops = &ioport_events }, |
| 136 | { NULL, NULL }, |
| 137 | }; |
| 138 | |
| 139 | const char * const kvm_skip_events[] = { |
| 140 | "HLT", |
| 141 | NULL, |
| 142 | }; |
| 143 | |
| 144 | int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid) |
| 145 | { |
| 146 | if (strstr(cpuid, "Intel")) { |
| 147 | kvm->exit_reasons = vmx_exit_reasons; |
| 148 | kvm->exit_reasons_isa = "VMX"; |
| 149 | } else if (strstr(cpuid, "AMD")) { |
| 150 | kvm->exit_reasons = svm_exit_reasons; |
| 151 | kvm->exit_reasons_isa = "SVM"; |
| 152 | } else |
| 153 | return -ENOTSUP; |
| 154 | |
| 155 | return 0; |
| 156 | } |