tools/perf: Add basic support for LoongArch

Add basic support for LoongArch, which is very similar to the MIPS
version.

Signed-off-by: Ming Wang <wangming01@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

6 files changed, 100 insertions, 0 deletions

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index db475e44f42f..0cc7710f32da 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -149,6 +149,7 @@ static int arch__associate_ins_ops(struct arch* arch, const char *name, struct i
 #include "arch/arm/annotate/instructions.c"
 #include "arch/arm64/annotate/instructions.c"
 #include "arch/csky/annotate/instructions.c"
+#include "arch/loongarch/annotate/instructions.c"
 #include "arch/mips/annotate/instructions.c"
 #include "arch/x86/annotate/instructions.c"
 #include "arch/powerpc/annotate/instructions.c"
@@ -211,6 +212,13 @@ static struct arch architectures[] = {
 			.comment_char = '#',
 		},
 	},
+	{
+		.name = "loongarch",
+		.init = loongarch__annotate_init,
+		.objdump = {
+			.comment_char = '#',
+		},
+	},
 };
 
 static void ins__delete(struct ins_operands *ops)
diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
index 3fa4486742cd..69cfaa5953bf 100644
--- a/tools/perf/util/dwarf-regs.c
+++ b/tools/perf/util/dwarf-regs.c
@@ -14,6 +14,10 @@
 #define EM_AARCH64	183  /* ARM 64 bit */
 #endif
 
+#ifndef EM_LOONGARCH
+#define EM_LOONGARCH	258 /* LoongArch */
+#endif
+
 /* Define const char * {arch}_register_tbl[] */
 #define DEFINE_DWARF_REGSTR_TABLE
 #include "../arch/x86/include/dwarf-regs-table.h"
@@ -25,6 +29,7 @@
 #include "../arch/sparc/include/dwarf-regs-table.h"
 #include "../arch/xtensa/include/dwarf-regs-table.h"
 #include "../arch/mips/include/dwarf-regs-table.h"
+#include "../arch/loongarch/include/dwarf-regs-table.h"
 
 #define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)
 
@@ -56,6 +61,8 @@ const char *get_dwarf_regstr(unsigned int n, unsigned int machine)
 		return __get_dwarf_regstr(xtensa_regstr_tbl, n);
 	case EM_MIPS:
 		return __get_dwarf_regstr(mips_regstr_tbl, n);
+	case EM_LOONGARCH:
+		return __get_dwarf_regstr(loongarch_regstr_tbl, n);
 	default:
 		pr_err("ELF MACHINE %x is not supported.\n", machine);
 	}
diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
index 5b8cf6a421a4..0d5d40cb997b 100644
--- a/tools/perf/util/env.c
+++ b/tools/perf/util/env.c
@@ -435,6 +435,8 @@ static const char *normalize_arch(char *arch)
 		return "mips";
 	if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
 		return "sh";
+	if (!strncmp(arch, "loongarch", 9))
+		return "loongarch";
 
 	return arch;
 }
diff --git a/tools/perf/util/genelf.h b/tools/perf/util/genelf.h
index 6af062d1c452..5f18d20ea903 100644
--- a/tools/perf/util/genelf.h
+++ b/tools/perf/util/genelf.h
@@ -43,6 +43,9 @@ int jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_ent
 #elif defined(__riscv) && __riscv_xlen == 64
 #define GEN_ELF_ARCH	EM_RISCV
 #define GEN_ELF_CLASS	ELFCLASS64
+#elif defined(__loongarch__)
+#define GEN_ELF_ARCH	EM_LOONGARCH
+#define GEN_ELF_CLASS	ELFCLASS64
 #else
 #error "unsupported architecture"
 #endif
diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c
index 57a567ee2cea..9bdbaa37f813 100644
--- a/tools/perf/util/perf_regs.c
+++ b/tools/perf/util/perf_regs.c
@@ -28,6 +28,7 @@ uint64_t __weak arch__user_reg_mask(void)
 
 #include "../../arch/arm/include/uapi/asm/perf_regs.h"
 #include "../../arch/csky/include/uapi/asm/perf_regs.h"
+#include "../../arch/loongarch/include/uapi/asm/perf_regs.h"
 #include "../../arch/mips/include/uapi/asm/perf_regs.h"
 #include "../../arch/powerpc/include/uapi/asm/perf_regs.h"
 #include "../../arch/riscv/include/uapi/asm/perf_regs.h"
@@ -236,6 +237,79 @@ static const char *__perf_reg_name_csky(int id)
 	return NULL;
 }
 
+static inline const char *__perf_reg_name_loongarch(int id)
+{
+	switch (id) {
+	case PERF_REG_LOONGARCH_PC:
+		return "PC";
+	case PERF_REG_LOONGARCH_R1:
+		return "%r1";
+	case PERF_REG_LOONGARCH_R2:
+		return "%r2";
+	case PERF_REG_LOONGARCH_R3:
+		return "%r3";
+	case PERF_REG_LOONGARCH_R4:
+		return "%r4";
+	case PERF_REG_LOONGARCH_R5:
+		return "%r5";
+	case PERF_REG_LOONGARCH_R6:
+		return "%r6";
+	case PERF_REG_LOONGARCH_R7:
+		return "%r7";
+	case PERF_REG_LOONGARCH_R8:
+		return "%r8";
+	case PERF_REG_LOONGARCH_R9:
+		return "%r9";
+	case PERF_REG_LOONGARCH_R10:
+		return "%r10";
+	case PERF_REG_LOONGARCH_R11:
+		return "%r11";
+	case PERF_REG_LOONGARCH_R12:
+		return "%r12";
+	case PERF_REG_LOONGARCH_R13:
+		return "%r13";
+	case PERF_REG_LOONGARCH_R14:
+		return "%r14";
+	case PERF_REG_LOONGARCH_R15:
+		return "%r15";
+	case PERF_REG_LOONGARCH_R16:
+		return "%r16";
+	case PERF_REG_LOONGARCH_R17:
+		return "%r17";
+	case PERF_REG_LOONGARCH_R18:
+		return "%r18";
+	case PERF_REG_LOONGARCH_R19:
+		return "%r19";
+	case PERF_REG_LOONGARCH_R20:
+		return "%r20";
+	case PERF_REG_LOONGARCH_R21:
+		return "%r21";
+	case PERF_REG_LOONGARCH_R22:
+		return "%r22";
+	case PERF_REG_LOONGARCH_R23:
+		return "%r23";
+	case PERF_REG_LOONGARCH_R24:
+		return "%r24";
+	case PERF_REG_LOONGARCH_R25:
+		return "%r25";
+	case PERF_REG_LOONGARCH_R26:
+		return "%r26";
+	case PERF_REG_LOONGARCH_R27:
+		return "%r27";
+	case PERF_REG_LOONGARCH_R28:
+		return "%r28";
+	case PERF_REG_LOONGARCH_R29:
+		return "%r29";
+	case PERF_REG_LOONGARCH_R30:
+		return "%r30";
+	case PERF_REG_LOONGARCH_R31:
+		return "%r31";
+	default:
+		break;
+	}
+	return NULL;
+}
+
 static const char *__perf_reg_name_mips(int id)
 {
 	switch (id) {
@@ -670,6 +744,8 @@ const char *perf_reg_name(int id, const char *arch)
 
 	if (!strcmp(arch, "csky"))
 		reg_name = __perf_reg_name_csky(id);
+	else if (!strcmp(arch, "loongarch"))
+		reg_name = __perf_reg_name_loongarch(id);
 	else if (!strcmp(arch, "mips"))
 		reg_name = __perf_reg_name_mips(id);
 	else if (!strcmp(arch, "powerpc"))
diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
index a2e906858891..313eccef6cb4 100644
--- a/tools/perf/util/syscalltbl.c
+++ b/tools/perf/util/syscalltbl.c
@@ -38,6 +38,10 @@ static const char **syscalltbl_native = syscalltbl_arm64;
 #include <asm/syscalls_n64.c>
 const int syscalltbl_native_max_id = SYSCALLTBL_MIPS_N64_MAX_ID;
 static const char **syscalltbl_native = syscalltbl_mips_n64;
+#elif defined(__loongarch__)
+#include <asm/syscalls.c>
+const int syscalltbl_native_max_id = SYSCALLTBL_LOONGARCH_MAX_ID;
+static const char **syscalltbl_native = syscalltbl_loongarch;
 #endif
 
 struct syscall {