--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Implementation of get_cpuid().
+ *
+ * Author: Nikita Shubin <n.shubin@yadro.com>
+ * Bibo Mao <maobibo@loongson.cn>
+ * Huacai Chen <chenhuacai@loongson.cn>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <api/fs/fs.h>
+#include <errno.h>
+#include "util/debug.h"
+#include "util/header.h"
+
+/*
+ * Output example from /proc/cpuinfo
+ * CPU Family : Loongson-64bit
+ * Model Name : Loongson-3C5000
+ * CPU Revision : 0x10
+ * FPU Revision : 0x01
+ */
+#define CPUINFO_MODEL "Model Name"
+#define CPUINFO "/proc/cpuinfo"
+
+static char *_get_field(const char *line)
+{
+ char *line2, *nl;
+
+ line2 = strrchr(line, ' ');
+ if (!line2)
+ return NULL;
+
+ line2++;
+ nl = strrchr(line, '\n');
+ if (!nl)
+ return NULL;
+
+ return strndup(line2, nl - line2);
+}
+
+static char *_get_cpuid(void)
+{
+ unsigned long line_sz;
+ char *line, *model, *cpuid;
+ FILE *file;
+
+ file = fopen(CPUINFO, "r");
+ if (file == NULL)
+ return NULL;
+
+ line = model = cpuid = NULL;
+ while (getline(&line, &line_sz, file) != -1) {
+ if (strncmp(line, CPUINFO_MODEL, strlen(CPUINFO_MODEL)))
+ continue;
+
+ model = _get_field(line);
+ if (!model)
+ goto out_free;
+ break;
+ }
+
+ if (model && (asprintf(&cpuid, "%s", model) < 0))
+ cpuid = NULL;
+
+out_free:
+ fclose(file);
+ free(model);
+ return cpuid;
+}
+
+int get_cpuid(char *buffer, size_t sz)
+{
+ int ret = 0;
+ char *cpuid = _get_cpuid();
+
+ if (!cpuid)
+ return EINVAL;
+
+ if (sz < strlen(cpuid)) {
+ ret = ENOBUFS;
+ goto out_free;
+ }
+
+ scnprintf(buffer, sz, "%s", cpuid);
+
+out_free:
+ free(cpuid);
+ return ret;
+}
+
+char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused)
+{
+ return _get_cpuid();
+}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+#include <errno.h>
+#include <memory.h>
+#include "util/kvm-stat.h"
+#include "util/parse-events.h"
+#include "util/debug.h"
+#include "util/evsel.h"
+#include "util/evlist.h"
+#include "util/pmus.h"
+
+#define LOONGARCH_EXCEPTION_INT 0
+#define LOONGARCH_EXCEPTION_PIL 1
+#define LOONGARCH_EXCEPTION_PIS 2
+#define LOONGARCH_EXCEPTION_PIF 3
+#define LOONGARCH_EXCEPTION_PME 4
+#define LOONGARCH_EXCEPTION_FPD 15
+#define LOONGARCH_EXCEPTION_SXD 16
+#define LOONGARCH_EXCEPTION_ASXD 17
+#define LOONGARCH_EXCEPTION_GSPR 22
+#define LOONGARCH_EXCEPTION_CPUCFG 100
+#define LOONGARCH_EXCEPTION_CSR 101
+#define LOONGARCH_EXCEPTION_IOCSR 102
+#define LOONGARCH_EXCEPTION_IDLE 103
+#define LOONGARCH_EXCEPTION_OTHERS 104
+#define LOONGARCH_EXCEPTION_HVC 23
+
+#define loongarch_exception_type \
+ {LOONGARCH_EXCEPTION_INT, "Interrupt" }, \
+ {LOONGARCH_EXCEPTION_PIL, "Mem Read" }, \
+ {LOONGARCH_EXCEPTION_PIS, "Mem Store" }, \
+ {LOONGARCH_EXCEPTION_PIF, "Inst Fetch" }, \
+ {LOONGARCH_EXCEPTION_PME, "Mem Modify" }, \
+ {LOONGARCH_EXCEPTION_FPD, "FPU" }, \
+ {LOONGARCH_EXCEPTION_SXD, "LSX" }, \
+ {LOONGARCH_EXCEPTION_ASXD, "LASX" }, \
+ {LOONGARCH_EXCEPTION_GSPR, "Privilege Error" }, \
+ {LOONGARCH_EXCEPTION_HVC, "Hypercall" }, \
+ {LOONGARCH_EXCEPTION_CPUCFG, "CPUCFG" }, \
+ {LOONGARCH_EXCEPTION_CSR, "CSR" }, \
+ {LOONGARCH_EXCEPTION_IOCSR, "IOCSR" }, \
+ {LOONGARCH_EXCEPTION_IDLE, "Idle" }, \
+ {LOONGARCH_EXCEPTION_OTHERS, "Others" }
+
+define_exit_reasons_table(loongarch_exit_reasons, loongarch_exception_type);
+
+const char *vcpu_id_str = "vcpu_id";
+const char *kvm_exit_reason = "reason";
+const char *kvm_entry_trace = "kvm:kvm_enter";
+const char *kvm_reenter_trace = "kvm:kvm_reenter";
+const char *kvm_exit_trace = "kvm:kvm_exit";
+const char *kvm_events_tp[] = {
+ "kvm:kvm_enter",
+ "kvm:kvm_reenter",
+ "kvm:kvm_exit",
+ "kvm:kvm_exit_gspr",
+ NULL,
+};
+
+static bool event_begin(struct evsel *evsel,
+ struct perf_sample *sample, struct event_key *key)
+{
+ return exit_event_begin(evsel, sample, key);
+}
+
+static bool event_end(struct evsel *evsel,
+ struct perf_sample *sample __maybe_unused,
+ struct event_key *key __maybe_unused)
+{
+ /*
+ * LoongArch kvm is different with other architectures
+ *
+ * There is kvm:kvm_reenter or kvm:kvm_enter event adjacent with
+ * kvm:kvm_exit event.
+ * kvm:kvm_enter means returning to vmm and then to guest
+ * kvm:kvm_reenter means returning to guest immediately
+ */
+ return evsel__name_is(evsel, kvm_entry_trace) || evsel__name_is(evsel, kvm_reenter_trace);
+}
+
+static void event_gspr_get_key(struct evsel *evsel,
+ struct perf_sample *sample, struct event_key *key)
+{
+ unsigned int insn;
+
+ key->key = LOONGARCH_EXCEPTION_OTHERS;
+ insn = evsel__intval(evsel, sample, "inst_word");
+
+ switch (insn >> 24) {
+ case 0:
+ /* CPUCFG inst trap */
+ if ((insn >> 10) == 0x1b)
+ key->key = LOONGARCH_EXCEPTION_CPUCFG;
+ break;
+ case 4:
+ /* CSR inst trap */
+ key->key = LOONGARCH_EXCEPTION_CSR;
+ break;
+ case 6:
+ /* IOCSR inst trap */
+ if ((insn >> 15) == 0xc90)
+ key->key = LOONGARCH_EXCEPTION_IOCSR;
+ else if ((insn >> 15) == 0xc91)
+ /* Idle inst trap */
+ key->key = LOONGARCH_EXCEPTION_IDLE;
+ break;
+ default:
+ key->key = LOONGARCH_EXCEPTION_OTHERS;
+ break;
+ }
+}
+
+static struct child_event_ops child_events[] = {
+ { .name = "kvm:kvm_exit_gspr", .get_key = event_gspr_get_key },
+ { NULL, NULL },
+};
+
+static struct kvm_events_ops exit_events = {
+ .is_begin_event = event_begin,
+ .is_end_event = event_end,
+ .child_ops = child_events,
+ .decode_key = exit_event_decode_key,
+ .name = "VM-EXIT"
+};
+
+struct kvm_reg_events_ops kvm_reg_events_ops[] = {
+ { .name = "vmexit", .ops = &exit_events, },
+ { NULL, NULL },
+};
+
+const char * const kvm_skip_events[] = {
+ NULL,
+};
+
+int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid __maybe_unused)
+{
+ kvm->exit_reasons_isa = "loongarch64";
+ kvm->exit_reasons = loongarch_exit_reasons;
+ return 0;
+}
projects / nvme.git / commitdiff