diff options
| -rw-r--r-- | tools/perf/arch/arm64/util/perf_regs.c | 38 | ||||
| -rw-r--r-- | tools/perf/util/perf_regs.c | 2 |
2 files changed, 40 insertions, 0 deletions
diff --git a/tools/perf/arch/arm64/util/perf_regs.c b/tools/perf/arch/arm64/util/perf_regs.c index 476b037eea1c..006692c9b040 100644 --- a/tools/perf/arch/arm64/util/perf_regs.c +++ b/tools/perf/arch/arm64/util/perf_regs.c @@ -2,13 +2,19 @@ #include <errno.h> #include <regex.h> #include <string.h> +#include <sys/auxv.h> #include <linux/kernel.h> #include <linux/zalloc.h> +#include "../../../perf-sys.h" #include "../../../util/debug.h" #include "../../../util/event.h" #include "../../../util/perf_regs.h" +#ifndef HWCAP_SVE +#define HWCAP_SVE (1 << 22) +#endif + const struct sample_reg sample_reg_masks[] = { SMPL_REG(x0, PERF_REG_ARM64_X0), SMPL_REG(x1, PERF_REG_ARM64_X1), @@ -43,6 +49,7 @@ const struct sample_reg sample_reg_masks[] = { SMPL_REG(lr, PERF_REG_ARM64_LR), SMPL_REG(sp, PERF_REG_ARM64_SP), SMPL_REG(pc, PERF_REG_ARM64_PC), + SMPL_REG(vg, PERF_REG_ARM64_VG), SMPL_REG_END }; @@ -131,3 +138,34 @@ int arch_sdt_arg_parse_op(char *old_op, char **new_op) return SDT_ARG_VALID; } + +uint64_t arch__user_reg_mask(void) +{ + struct perf_event_attr attr = { + .type = PERF_TYPE_HARDWARE, + .config = PERF_COUNT_HW_CPU_CYCLES, + .sample_type = PERF_SAMPLE_REGS_USER, + .disabled = 1, + .exclude_kernel = 1, + .sample_period = 1, + .sample_regs_user = PERF_REGS_MASK + }; + int fd; + + if (getauxval(AT_HWCAP) & HWCAP_SVE) + attr.sample_regs_user |= SMPL_REG_MASK(PERF_REG_ARM64_VG); + + /* + * Check if the pmu supports perf extended regs, before + * returning the register mask to sample. + */ + if (attr.sample_regs_user != PERF_REGS_MASK) { + event_attr_init(&attr); + fd = sys_perf_event_open(&attr, 0, -1, -1, 0); + if (fd != -1) { + close(fd); + return attr.sample_regs_user; + } + } + return PERF_REGS_MASK; +} diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c index a982e40ee5a9..872dd3d38782 100644 --- a/tools/perf/util/perf_regs.c +++ b/tools/perf/util/perf_regs.c @@ -103,6 +103,8 @@ static const char *__perf_reg_name_arm64(int id) return "lr"; case PERF_REG_ARM64_PC: return "pc"; + case PERF_REG_ARM64_VG: + return "vg"; default: return NULL; } |