5 files changed, 241 insertions, 49 deletions

diff --git a/tools/perf/arch/loongarch/util/Build b/tools/perf/arch/loongarch/util/Build
index d776125a2d06..0aa31986ecb5 100644
--- a/tools/perf/arch/loongarch/util/Build
+++ b/tools/perf/arch/loongarch/util/Build
@@ -1,5 +1,6 @@
-perf-y += perf_regs.o
+perf-util-y += header.o
+perf-util-y += perf_regs.o
 
-perf-$(CONFIG_DWARF)     += dwarf-regs.o
-perf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
-perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+perf-util-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind.o
+perf-util-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
+perf-util-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o
diff --git a/tools/perf/arch/loongarch/util/dwarf-regs.c b/tools/perf/arch/loongarch/util/dwarf-regs.c
deleted file mode 100644
index 0f6ebc387463..000000000000
--- a/tools/perf/arch/loongarch/util/dwarf-regs.c
+++ /dev/null
@@ -1,44 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
- *
- * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
- */
-
-#include <stdio.h>
-#include <errno.h> /* for EINVAL */
-#include <string.h> /* for strcmp */
-#include <dwarf-regs.h>
-
-struct pt_regs_dwarfnum {
-	const char *name;
-	unsigned int dwarfnum;
-};
-
-static struct pt_regs_dwarfnum loongarch_gpr_table[] = {
-	{"%r0", 0}, {"%r1", 1}, {"%r2", 2}, {"%r3", 3},
-	{"%r4", 4}, {"%r5", 5}, {"%r6", 6}, {"%r7", 7},
-	{"%r8", 8}, {"%r9", 9}, {"%r10", 10}, {"%r11", 11},
-	{"%r12", 12}, {"%r13", 13}, {"%r14", 14}, {"%r15", 15},
-	{"%r16", 16}, {"%r17", 17}, {"%r18", 18}, {"%r19", 19},
-	{"%r20", 20}, {"%r21", 21}, {"%r22", 22}, {"%r23", 23},
-	{"%r24", 24}, {"%r25", 25}, {"%r26", 26}, {"%r27", 27},
-	{"%r28", 28}, {"%r29", 29}, {"%r30", 30}, {"%r31", 31},
-	{NULL, 0}
-};
-
-const char *get_arch_regstr(unsigned int n)
-{
-	n %= 32;
-	return loongarch_gpr_table[n].name;
-}
-
-int regs_query_register_offset(const char *name)
-{
-	const struct pt_regs_dwarfnum *roff;
-
-	for (roff = loongarch_gpr_table; roff->name != NULL; roff++)
-		if (!strcmp(roff->name, name))
-			return roff->dwarfnum;
-	return -EINVAL;
-}
diff --git a/tools/perf/arch/loongarch/util/header.c b/tools/perf/arch/loongarch/util/header.c
new file mode 100644
index 000000000000..0c6d823334a2
--- /dev/null
+++ b/tools/perf/arch/loongarch/util/header.c
@@ -0,0 +1,96 @@
+// 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, struct perf_cpu cpu __maybe_unused)
+{
+	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_cpu cpu __maybe_unused)
+{
+	return _get_cpuid();
+}
diff --git a/tools/perf/arch/loongarch/util/kvm-stat.c b/tools/perf/arch/loongarch/util/kvm-stat.c
new file mode 100644
index 000000000000..a7859a3a9a51
--- /dev/null
+++ b/tools/perf/arch/loongarch/util/kvm-stat.c
@@ -0,0 +1,139 @@
+// 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;
+}
diff --git a/tools/perf/arch/loongarch/util/unwind-libdw.c b/tools/perf/arch/loongarch/util/unwind-libdw.c
index 7b3b9a4b21f8..60b1144bedd5 100644
--- a/tools/perf/arch/loongarch/util/unwind-libdw.c
+++ b/tools/perf/arch/loongarch/util/unwind-libdw.c
@@ -10,7 +10,7 @@
 bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
 {
 	struct unwind_info *ui = arg;
-	struct regs_dump *user_regs = &ui->sample->user_regs;
+	struct regs_dump *user_regs = perf_sample__user_regs(ui->sample);
 	Dwarf_Word dwarf_regs[PERF_REG_LOONGARCH_MAX];
 
 #define REG(r) ({							\