From f6a66ff98ac1cfbfb83ec2445f5652ae065a1bf0 Mon Sep 17 00:00:00 2001 From: Athira Rajeev Date: Mon, 9 Oct 2023 10:30:52 +0530 Subject: tools/perf/arch/powerpc: Fix the CPU ID const char* value by adding 0x prefix Simple expression parser test fails in powerpc as below: 4: Simple expression parser test child forked, pid 170385 Using CPUID 004e2102 division by zero syntax error syntax error FAILED tests/expr.c:65 parse test failed test child finished with -1 Simple expression parser: FAILED! This is observed after commit: 'commit 9d5da30e4ae9 ("perf jevents: Add a new expression builtin strcmp_cpuid_str()")' With this commit, a new expression builtin strcmp_cpuid_str got added. This function takes an 'ID' type value, which is a string. So expression parse for strcmp_cpuid_str expects const char * as cpuid value type. In case of powerpc, CPU IDs are numbers. Hence it doesn't get interpreted correctly by bison parser. Example in case of power9, cpuid string returns as: 004e2102 cpuid of string type is expected in two cases: 1. char *get_cpuid_str(struct perf_pmu *pmu __maybe_unused); Testcase "tests/expr.c" uses "perf_pmu__getcpuid" which calls get_cpuid_str to get the cpuid string. 2. cpuid field in :struct pmu_events_map struct pmu_events_map { const char *arch; const char *cpuid; Here cpuid field is used in "perf_pmu__find_events_table" function as "strcmp_cpuid_str(map->cpuid, cpuid)". The value for cpuid field is picked from mapfile.csv. Fix the mapfile.csv and get_cpuid_str function to prefix cpuid with 0x so that it gets correctly interpreted by the bison parser Signed-off-by: Athira Rajeev Tested-by: Disha Goel Cc: kjain@linux.ibm.com Cc: maddy@linux.ibm.com Cc: disgoel@linux.vnet.ibm.com Cc: linuxppc-dev@lists.ozlabs.org Link: https://lore.kernel.org/r/20231009050052.64935-1-atrajeev@linux.vnet.ibm.com Signed-off-by: Namhyung Kim --- tools/perf/arch/powerpc/util/header.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'tools/perf/arch/powerpc') diff --git a/tools/perf/arch/powerpc/util/header.c b/tools/perf/arch/powerpc/util/header.c index c8d0dc775e5d..6b00efd53638 100644 --- a/tools/perf/arch/powerpc/util/header.c +++ b/tools/perf/arch/powerpc/util/header.c @@ -34,7 +34,7 @@ get_cpuid_str(struct perf_pmu *pmu __maybe_unused) { char *bufp; - if (asprintf(&bufp, "%.8lx", mfspr(SPRN_PVR)) < 0) + if (asprintf(&bufp, "0x%.8lx", mfspr(SPRN_PVR)) < 0) bufp = NULL; return bufp; -- cgit v1.2.3