From: Ravi Bangoria Date: Fri, 30 Jun 2023 08:52:30 +0000 (+0530) Subject: perf evsel amd: Fix IBS error message X-Git-Tag: v6.6.7~2391^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b2ad9549bfd0c1f74287492a9d9a31a03c97f088;p=platform%2Fkernel%2Flinux-starfive.git perf evsel amd: Fix IBS error message AMD IBS can do per-process profiling[1] and is no longer restricted to per-cpu or systemwide only. Remove stale error message. Also, checking just exclude_kernel is not sufficient since IBS does not support any privilege filters. So include all exclude_* checks. And finally, move these checks under tools/perf/arch/x86/ from generic code. Before: $ sudo ./perf record -e ibs_op//k -C 0 Error: AMD IBS may only be available in system-wide/per-cpu mode. Try using -a, or -C and workload affinity After: $ sudo ./perf record -e ibs_op//k -C 0 Error: AMD IBS doesn't support privilege filtering. Try again without the privilege modifiers (like 'k') at the end. [1] https://git.kernel.org/torvalds/c/30093056f7b2 Signed-off-by: Ravi Bangoria Acked-by: Namhyung Kim Cc: ananth.narayan@amd.com Cc: sandipan.das@amd.com Cc: santosh.shukla@amd.com Cc: irogers@google.com Cc: peterz@infradead.org Cc: adrian.hunter@intel.com Cc: acme@kernel.org Cc: jolsa@kernel.org Link: https://lore.kernel.org/r/20230630085230.437-1-ravi.bangoria@amd.com Signed-off-by: Namhyung Kim --- diff --git a/tools/perf/arch/x86/util/evsel.c b/tools/perf/arch/x86/util/evsel.c index 512c2d8..81d2265 100644 --- a/tools/perf/arch/x86/util/evsel.c +++ b/tools/perf/arch/x86/util/evsel.c @@ -102,3 +102,23 @@ void arch__post_evsel_config(struct evsel *evsel, struct perf_event_attr *attr) } } } + +int arch_evsel__open_strerror(struct evsel *evsel, char *msg, size_t size) +{ + if (!x86__is_amd_cpu()) + return 0; + + if (!evsel->core.attr.precise_ip && + !(evsel->pmu_name && !strncmp(evsel->pmu_name, "ibs", 3))) + return 0; + + /* More verbose IBS errors. */ + if (evsel->core.attr.exclude_kernel || evsel->core.attr.exclude_user || + evsel->core.attr.exclude_hv || evsel->core.attr.exclude_idle || + evsel->core.attr.exclude_host || evsel->core.attr.exclude_guest) { + return scnprintf(msg, size, "AMD IBS doesn't support privilege filtering. Try " + "again without the privilege modifiers (like 'k') at the end."); + } + + return 0; +} diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index f607b5b..762e2b2 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -2924,25 +2924,19 @@ static bool find_process(const char *name) return ret ? false : true; } -static bool is_amd(const char *arch, const char *cpuid) +int __weak arch_evsel__open_strerror(struct evsel *evsel __maybe_unused, + char *msg __maybe_unused, + size_t size __maybe_unused) { - return arch && !strcmp("x86", arch) && cpuid && strstarts(cpuid, "AuthenticAMD"); -} - -static bool is_amd_ibs(struct evsel *evsel) -{ - return evsel->core.attr.precise_ip - || (evsel->pmu_name && !strncmp(evsel->pmu_name, "ibs", 3)); + return 0; } int evsel__open_strerror(struct evsel *evsel, struct target *target, int err, char *msg, size_t size) { - struct perf_env *env = evsel__env(evsel); - const char *arch = perf_env__arch(env); - const char *cpuid = perf_env__cpuid(env); char sbuf[STRERR_BUFSIZE]; int printed = 0, enforced = 0; + int ret; switch (err) { case EPERM: @@ -3044,16 +3038,6 @@ int evsel__open_strerror(struct evsel *evsel, struct target *target, return scnprintf(msg, size, "Invalid event (%s) in per-thread mode, enable system wide with '-a'.", evsel__name(evsel)); - if (is_amd(arch, cpuid)) { - if (is_amd_ibs(evsel)) { - if (evsel->core.attr.exclude_kernel) - return scnprintf(msg, size, - "AMD IBS can't exclude kernel events. Try running at a higher privilege level."); - if (!evsel->core.system_wide) - return scnprintf(msg, size, - "AMD IBS may only be available in system-wide/per-cpu mode. Try using -a, or -C and workload affinity"); - } - } break; case ENODATA: @@ -3063,6 +3047,10 @@ int evsel__open_strerror(struct evsel *evsel, struct target *target, break; } + ret = arch_evsel__open_strerror(evsel, msg, size); + if (ret) + return ret; + return scnprintf(msg, size, "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n" "/bin/dmesg | grep -i perf may provide additional information.\n", diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 9f06d6c..848534e 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -311,6 +311,7 @@ void evsel__set_sample_id(struct evsel *evsel, bool use_sample_identifier); void arch_evsel__set_sample_weight(struct evsel *evsel); void arch__post_evsel_config(struct evsel *evsel, struct perf_event_attr *attr); +int arch_evsel__open_strerror(struct evsel *evsel, char *msg, size_t size); int evsel__set_filter(struct evsel *evsel, const char *filter); int evsel__append_tp_filter(struct evsel *evsel, const char *filter);