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-rw-r--r--tools/perf/arch/x86/util/kvm-stat.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/tools/perf/arch/x86/util/kvm-stat.c b/tools/perf/arch/x86/util/kvm-stat.c
new file mode 100644
index 000000000..072920475
--- /dev/null
+++ b/tools/perf/arch/x86/util/kvm-stat.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <errno.h>
+#include <string.h>
+#include "../../../util/kvm-stat.h"
+#include "../../../util/evsel.h"
+#include <asm/svm.h>
+#include <asm/vmx.h>
+#include <asm/kvm.h>
+
+define_exit_reasons_table(vmx_exit_reasons, VMX_EXIT_REASONS);
+define_exit_reasons_table(svm_exit_reasons, SVM_EXIT_REASONS);
+
+static struct kvm_events_ops exit_events = {
+ .is_begin_event = exit_event_begin,
+ .is_end_event = exit_event_end,
+ .decode_key = exit_event_decode_key,
+ .name = "VM-EXIT"
+};
+
+const char *vcpu_id_str = "vcpu_id";
+const int decode_str_len = 20;
+const char *kvm_exit_reason = "exit_reason";
+const char *kvm_entry_trace = "kvm:kvm_entry";
+const char *kvm_exit_trace = "kvm:kvm_exit";
+
+/*
+ * For the mmio events, we treat:
+ * the time of MMIO write: kvm_mmio(KVM_TRACE_MMIO_WRITE...) -> kvm_entry
+ * the time of MMIO read: kvm_exit -> kvm_mmio(KVM_TRACE_MMIO_READ...).
+ */
+static void mmio_event_get_key(struct evsel *evsel, struct perf_sample *sample,
+ struct event_key *key)
+{
+ key->key = evsel__intval(evsel, sample, "gpa");
+ key->info = evsel__intval(evsel, sample, "type");
+}
+
+#define KVM_TRACE_MMIO_READ_UNSATISFIED 0
+#define KVM_TRACE_MMIO_READ 1
+#define KVM_TRACE_MMIO_WRITE 2
+
+static bool mmio_event_begin(struct evsel *evsel,
+ struct perf_sample *sample, struct event_key *key)
+{
+ /* MMIO read begin event in kernel. */
+ if (kvm_exit_event(evsel))
+ return true;
+
+ /* MMIO write begin event in kernel. */
+ if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
+ evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_WRITE) {
+ mmio_event_get_key(evsel, sample, key);
+ return true;
+ }
+
+ return false;
+}
+
+static bool mmio_event_end(struct evsel *evsel, struct perf_sample *sample,
+ struct event_key *key)
+{
+ /* MMIO write end event in kernel. */
+ if (kvm_entry_event(evsel))
+ return true;
+
+ /* MMIO read end event in kernel.*/
+ if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
+ evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_READ) {
+ mmio_event_get_key(evsel, sample, key);
+ return true;
+ }
+
+ return false;
+}
+
+static void mmio_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
+ struct event_key *key,
+ char *decode)
+{
+ scnprintf(decode, decode_str_len, "%#lx:%s",
+ (unsigned long)key->key,
+ key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R");
+}
+
+static struct kvm_events_ops mmio_events = {
+ .is_begin_event = mmio_event_begin,
+ .is_end_event = mmio_event_end,
+ .decode_key = mmio_event_decode_key,
+ .name = "MMIO Access"
+};
+
+ /* The time of emulation pio access is from kvm_pio to kvm_entry. */
+static void ioport_event_get_key(struct evsel *evsel,
+ struct perf_sample *sample,
+ struct event_key *key)
+{
+ key->key = evsel__intval(evsel, sample, "port");
+ key->info = evsel__intval(evsel, sample, "rw");
+}
+
+static bool ioport_event_begin(struct evsel *evsel,
+ struct perf_sample *sample,
+ struct event_key *key)
+{
+ if (!strcmp(evsel->name, "kvm:kvm_pio")) {
+ ioport_event_get_key(evsel, sample, key);
+ return true;
+ }
+
+ return false;
+}
+
+static bool ioport_event_end(struct evsel *evsel,
+ struct perf_sample *sample __maybe_unused,
+ struct event_key *key __maybe_unused)
+{
+ return kvm_entry_event(evsel);
+}
+
+static void ioport_event_decode_key(struct perf_kvm_stat *kvm __maybe_unused,
+ struct event_key *key,
+ char *decode)
+{
+ scnprintf(decode, decode_str_len, "%#llx:%s",
+ (unsigned long long)key->key,
+ key->info ? "POUT" : "PIN");
+}
+
+static struct kvm_events_ops ioport_events = {
+ .is_begin_event = ioport_event_begin,
+ .is_end_event = ioport_event_end,
+ .decode_key = ioport_event_decode_key,
+ .name = "IO Port Access"
+};
+
+const char *kvm_events_tp[] = {
+ "kvm:kvm_entry",
+ "kvm:kvm_exit",
+ "kvm:kvm_mmio",
+ "kvm:kvm_pio",
+ NULL,
+};
+
+struct kvm_reg_events_ops kvm_reg_events_ops[] = {
+ { .name = "vmexit", .ops = &exit_events },
+ { .name = "mmio", .ops = &mmio_events },
+ { .name = "ioport", .ops = &ioport_events },
+ { NULL, NULL },
+};
+
+const char * const kvm_skip_events[] = {
+ "HLT",
+ NULL,
+};
+
+int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid)
+{
+ if (strstr(cpuid, "Intel")) {
+ kvm->exit_reasons = vmx_exit_reasons;
+ kvm->exit_reasons_isa = "VMX";
+ } else if (strstr(cpuid, "AMD") || strstr(cpuid, "Hygon")) {
+ kvm->exit_reasons = svm_exit_reasons;
+ kvm->exit_reasons_isa = "SVM";
+ } else
+ return -ENOTSUP;
+
+ return 0;
+}