diff options
| -rw-r--r-- | arch/powerpc/include/asm/perf_event_server.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/perf/core-book3s.c | 46 | ||||
| -rw-r--r-- | arch/powerpc/perf/power4-pmu.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/perf/ppc970-pmu.c | 1 |
4 files changed, 45 insertions, 5 deletions
diff --git a/arch/powerpc/include/asm/perf_event_server.h b/arch/powerpc/include/asm/perf_event_server.h index 1a8093fa8f7..078019b5b35 100644 --- a/arch/powerpc/include/asm/perf_event_server.h +++ b/arch/powerpc/include/asm/perf_event_server.h @@ -47,6 +47,8 @@ struct power_pmu { */ #define PPMU_LIMITED_PMC5_6 1 /* PMC5/6 have limited function */ #define PPMU_ALT_SIPR 2 /* uses alternate posn for SIPR/HV */ +#define PPMU_NO_SIPR 4 /* no SIPR/HV in MMCRA at all */ +#define PPMU_NO_CONT_SAMPLING 8 /* no continuous sampling */ /* * Values for flags to get_alternatives() diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c index c2e27ede07e..02aee03e713 100644 --- a/arch/powerpc/perf/core-book3s.c +++ b/arch/powerpc/perf/core-book3s.c @@ -116,14 +116,45 @@ static inline void perf_get_data_addr(struct pt_regs *regs, u64 *addrp) *addrp = mfspr(SPRN_SDAR); } +static inline u32 perf_flags_from_msr(struct pt_regs *regs) +{ + if (regs->msr & MSR_PR) + return PERF_RECORD_MISC_USER; + if ((regs->msr & MSR_HV) && freeze_events_kernel != MMCR0_FCHV) + return PERF_RECORD_MISC_HYPERVISOR; + return PERF_RECORD_MISC_KERNEL; +} + static inline u32 perf_get_misc_flags(struct pt_regs *regs) { unsigned long mmcra = regs->dsisr; unsigned long sihv = MMCRA_SIHV; unsigned long sipr = MMCRA_SIPR; + /* Not a PMU interrupt: Make up flags from regs->msr */ if (TRAP(regs) != 0xf00) - return 0; /* not a PMU interrupt */ + return perf_flags_from_msr(regs); + + /* + * If we don't support continuous sampling and this + * is not a marked event, same deal + */ + if ((ppmu->flags & PPMU_NO_CONT_SAMPLING) && + !(mmcra & MMCRA_SAMPLE_ENABLE)) + return perf_flags_from_msr(regs); + + /* + * If we don't have flags in MMCRA, rather than using + * the MSR, we intuit the flags from the address in + * SIAR which should give slightly more reliable + * results + */ + if (ppmu->flags & PPMU_NO_SIPR) { + unsigned long siar = mfspr(SPRN_SIAR); + if (siar >= PAGE_OFFSET) + return PERF_RECORD_MISC_KERNEL; + return PERF_RECORD_MISC_USER; + } if (ppmu->flags & PPMU_ALT_SIPR) { sihv = POWER6_MMCRA_SIHV; @@ -1299,13 +1330,18 @@ unsigned long perf_misc_flags(struct pt_regs *regs) */ unsigned long perf_instruction_pointer(struct pt_regs *regs) { - unsigned long ip; + unsigned long mmcra = regs->dsisr; + /* Not a PMU interrupt */ if (TRAP(regs) != 0xf00) - return regs->nip; /* not a PMU interrupt */ + return regs->nip; + + /* Processor doesn't support sampling non marked events */ + if ((ppmu->flags & PPMU_NO_CONT_SAMPLING) && + !(mmcra & MMCRA_SAMPLE_ENABLE)) + return regs->nip; - ip = mfspr(SPRN_SIAR) + perf_ip_adjust(regs); - return ip; + return mfspr(SPRN_SIAR) + perf_ip_adjust(regs); } static bool pmc_overflow(unsigned long val) diff --git a/arch/powerpc/perf/power4-pmu.c b/arch/powerpc/perf/power4-pmu.c index b4f1dda4d08..9103a1de864 100644 --- a/arch/powerpc/perf/power4-pmu.c +++ b/arch/powerpc/perf/power4-pmu.c @@ -607,6 +607,7 @@ static struct power_pmu power4_pmu = { .n_generic = ARRAY_SIZE(p4_generic_events), .generic_events = p4_generic_events, .cache_events = &power4_cache_events, + .flags = PPMU_NO_SIPR | PPMU_NO_CONT_SAMPLING, }; static int __init init_power4_pmu(void) diff --git a/arch/powerpc/perf/ppc970-pmu.c b/arch/powerpc/perf/ppc970-pmu.c index 111eb25bb0b..20139ceeacf 100644 --- a/arch/powerpc/perf/ppc970-pmu.c +++ b/arch/powerpc/perf/ppc970-pmu.c @@ -487,6 +487,7 @@ static struct power_pmu ppc970_pmu = { .n_generic = ARRAY_SIZE(ppc970_generic_events), .generic_events = ppc970_generic_events, .cache_events = &ppc970_cache_events, + .flags = PPMU_NO_SIPR | PPMU_NO_CONT_SAMPLING, }; static int __init init_ppc970_pmu(void) |