From cec0d6572a4472848b87d016105634e4eef76d13 Mon Sep 17 00:00:00 2001 From: Ian Rogers Date: Thu, 7 Nov 2024 08:20:30 -0800 Subject: [PATCH] perf header: Refactor get_cpuid to take a CPU for ARM MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit ARM BIG.little has no notion of a constant CPUID for both core types. To reflect this reality, change the get_cpuid function to also pass in a possibly unused logical cpu. If the dummy value (-1) is passed in then ARM can, as currently happens, select the first logical CPU's "CPUID". The changes to ARM getcpuid happen in a follow up change. Reviewed-by: James Clark Signed-off-by: Ian Rogers Tested-by: Xu Yang Cc: Adrian Hunter Cc: Albert Ou Cc: Alexander Shishkin Cc: Alexandre Ghiti Cc: Athira Rajeev Cc: Ben Zong-You Xie Cc: Benjamin Gray Cc: Bibo Mao Cc: Clément Le Goffic Cc: Dima Kogan Cc: Dr. David Alan Gilbert Cc: Huacai Chen Cc: Ingo Molnar Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Mike Leach Cc: Namhyung Kim Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Sandipan Das Cc: Will Deacon Cc: Yicong Yang Cc: linux-arm-kernel@lists.infradead.org Cc: linux-riscv@lists.infradead.org Link: https://lore.kernel.org/r/20241107162035.52206-4-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/arch/arm64/util/header.c | 2 +- tools/perf/arch/loongarch/util/header.c | 2 +- tools/perf/arch/powerpc/util/header.c | 2 +- tools/perf/arch/riscv/util/header.c | 2 +- tools/perf/arch/s390/util/header.c | 2 +- tools/perf/arch/x86/util/auxtrace.c | 3 ++- tools/perf/arch/x86/util/header.c | 2 +- tools/perf/builtin-kvm.c | 4 +++- tools/perf/util/env.c | 3 ++- tools/perf/util/header.c | 9 +++++---- tools/perf/util/header.h | 2 +- 11 files changed, 19 insertions(+), 14 deletions(-) diff --git a/tools/perf/arch/arm64/util/header.c b/tools/perf/arch/arm64/util/header.c index 741df3614a09..760c21784713 100644 --- a/tools/perf/arch/arm64/util/header.c +++ b/tools/perf/arch/arm64/util/header.c @@ -50,7 +50,7 @@ static int _get_cpuid(char *buf, size_t sz, struct perf_cpu_map *cpus) return ret; } -int get_cpuid(char *buf, size_t sz) +int get_cpuid(char *buf, size_t sz, struct perf_cpu cpu __maybe_unused) { struct perf_cpu_map *cpus = perf_cpu_map__new_online_cpus(); int ret; diff --git a/tools/perf/arch/loongarch/util/header.c b/tools/perf/arch/loongarch/util/header.c index d962dff55512..f1f0b116962d 100644 --- a/tools/perf/arch/loongarch/util/header.c +++ b/tools/perf/arch/loongarch/util/header.c @@ -70,7 +70,7 @@ out_free: return cpuid; } -int get_cpuid(char *buffer, size_t sz) +int get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu __maybe_unused) { int ret = 0; char *cpuid = _get_cpuid(); diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c index 251cdbf58a4d..6d1a63a2922f 100644 --- a/tools/perf/arch/powerpc/util/header.c +++ b/tools/perf/arch/powerpc/util/header.c @@ -24,7 +24,7 @@ static bool is_compat_mode(void) } int -get_cpuid(char *buffer, size_t sz) +get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu __maybe_unused) { unsigned long pvr; int nb; diff --git a/tools/perf/arch/riscv/util/header.c b/tools/perf/arch/riscv/util/header.c index 1b29030021ee..ebac294c877f 100644 --- a/tools/perf/arch/riscv/util/header.c +++ b/tools/perf/arch/riscv/util/header.c @@ -81,7 +81,7 @@ free: return cpuid; } -int get_cpuid(char *buffer, size_t sz) +int get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu __maybe_unused) { char *cpuid = _get_cpuid(); int ret = 0; diff --git a/tools/perf/arch/s390/util/header.c b/tools/perf/arch/s390/util/header.c index 7933f6871c81..2add1a561242 100644 --- a/tools/perf/arch/s390/util/header.c +++ b/tools/perf/arch/s390/util/header.c @@ -27,7 +27,7 @@ #define SYSINFO "/proc/sysinfo" #define SRVLVL "/proc/service_levels" -int get_cpuid(char *buffer, size_t sz) +int get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu __maybe_unused) { char *cp, *line = NULL, *line2; char type[8], model[33], version[8], manufacturer[32], authorization[8]; diff --git a/tools/perf/arch/x86/util/auxtrace.c b/tools/perf/arch/x86/util/auxtrace.c index 354780ff1605..ecbf61a7eb3a 100644 --- a/tools/perf/arch/x86/util/auxtrace.c +++ b/tools/perf/arch/x86/util/auxtrace.c @@ -55,11 +55,12 @@ struct auxtrace_record *auxtrace_record__init(struct evlist *evlist, int *err) { char buffer[64]; + struct perf_cpu cpu = perf_cpu_map__min(evlist->core.all_cpus); int ret; *err = 0; - ret = get_cpuid(buffer, sizeof(buffer)); + ret = get_cpuid(buffer, sizeof(buffer), cpu); if (ret) { *err = ret; return NULL; diff --git a/tools/perf/arch/x86/util/header.c b/tools/perf/arch/x86/util/header.c index a51444a77a5f..690f86cbbb1c 100644 --- a/tools/perf/arch/x86/util/header.c +++ b/tools/perf/arch/x86/util/header.c @@ -58,7 +58,7 @@ __get_cpuid(char *buffer, size_t sz, const char *fmt) } int -get_cpuid(char *buffer, size_t sz) +get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu __maybe_unused) { return __get_cpuid(buffer, sz, "%s,%u,%u,%u$"); } diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index 099ce3ebf67c..274568d712d1 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -1226,7 +1226,9 @@ static int cpu_isa_config(struct perf_kvm_stat *kvm) int err; if (kvm->live) { - err = get_cpuid(buf, sizeof(buf)); + struct perf_cpu cpu = {-1}; + + err = get_cpuid(buf, sizeof(buf), cpu); if (err != 0) { pr_err("Failed to look up CPU type: %s\n", str_error_r(err, buf, sizeof(buf))); diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c index ccb464026642..93cabdd7ff43 100644 --- a/tools/perf/util/env.c +++ b/tools/perf/util/env.c @@ -373,7 +373,8 @@ error: int perf_env__read_cpuid(struct perf_env *env) { char cpuid[128]; - int err = get_cpuid(cpuid, sizeof(cpuid)); + struct perf_cpu cpu = {-1}; + int err = get_cpuid(cpuid, sizeof(cpuid), cpu); if (err) return err; diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index c7552a78a7be..ecf08b458b05 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -856,18 +856,19 @@ int __weak strcmp_cpuid_str(const char *mapcpuid, const char *cpuid) * default get_cpuid(): nothing gets recorded * actual implementation must be in arch/$(SRCARCH)/util/header.c */ -int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused) +int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused, + struct perf_cpu cpu __maybe_unused) { return ENOSYS; /* Not implemented */ } -static int write_cpuid(struct feat_fd *ff, - struct evlist *evlist __maybe_unused) +static int write_cpuid(struct feat_fd *ff, struct evlist *evlist) { + struct perf_cpu cpu = perf_cpu_map__min(evlist->core.all_cpus); char buffer[64]; int ret; - ret = get_cpuid(buffer, sizeof(buffer)); + ret = get_cpuid(buffer, sizeof(buffer), cpu); if (ret) return -1; diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h index e91e89d22537..b77f89de12dd 100644 --- a/tools/perf/util/header.h +++ b/tools/perf/util/header.h @@ -201,7 +201,7 @@ int build_caches_for_cpu(u32 cpu, struct cpu_cache_level caches[], u32 *cntp); /* * arch specific callback */ -int get_cpuid(char *buffer, size_t sz); +int get_cpuid(char *buffer, size_t sz, struct perf_cpu cpu); char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused); int strcmp_cpuid_str(const char *s1, const char *s2); -- 2.50.1