diff options
Diffstat (limited to 'arch/powerpc/perf')
| -rw-r--r-- | arch/powerpc/perf/core-book3s.c | 21 | ||||
| -rw-r--r-- | arch/powerpc/perf/hv-gpci.c | 2 |
2 files changed, 12 insertions, 11 deletions
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c index bb0ee716de91..73e62e9b179b 100644 --- a/arch/powerpc/perf/core-book3s.c +++ b/arch/powerpc/perf/core-book3s.c @@ -340,6 +340,13 @@ static inline void perf_read_regs(struct pt_regs *regs) * If the PMU doesn't update the SIAR for non marked events use * pt_regs. * + * If regs is a kernel interrupt, always use SIAR. Some PMUs have an + * issue with regs_sipr not being in synch with SIAR in interrupt entry + * and return sequences, which can result in regs_sipr being true for + * kernel interrupts and SIAR, which has the effect of causing samples + * to pile up at mtmsrd MSR[EE] 0->1 or pending irq replay around + * interrupt entry/exit. + * * If the PMU has HV/PR flags then check to see if they * place the exception in userspace. If so, use pt_regs. In * continuous sampling mode the SIAR and the PMU exception are @@ -356,6 +363,8 @@ static inline void perf_read_regs(struct pt_regs *regs) use_siar = 1; else if ((ppmu->flags & PPMU_NO_CONT_SAMPLING)) use_siar = 0; + else if (!user_mode(regs)) + use_siar = 1; else if (!(ppmu->flags & PPMU_NO_SIPR) && regs_sipr(regs)) use_siar = 0; else @@ -2251,18 +2260,10 @@ unsigned long perf_misc_flags(struct pt_regs *regs) */ unsigned long perf_instruction_pointer(struct pt_regs *regs) { - bool use_siar = regs_use_siar(regs); unsigned long siar = mfspr(SPRN_SIAR); - if (ppmu && (ppmu->flags & PPMU_P10_DD1)) { - if (siar) - return siar; - else - return regs->nip; - } else if (use_siar && siar_valid(regs)) - return mfspr(SPRN_SIAR) + perf_ip_adjust(regs); - else if (use_siar) - return 0; // no valid instruction pointer + if (regs_use_siar(regs) && siar_valid(regs) && siar) + return siar + perf_ip_adjust(regs); else return regs->nip; } diff --git a/arch/powerpc/perf/hv-gpci.c b/arch/powerpc/perf/hv-gpci.c index d48413e28c39..c756228a081f 100644 --- a/arch/powerpc/perf/hv-gpci.c +++ b/arch/powerpc/perf/hv-gpci.c @@ -175,7 +175,7 @@ static unsigned long single_gpci_request(u32 req, u32 starting_index, */ count = 0; for (i = offset; i < offset + length; i++) - count |= arg->bytes[i] << (i - offset); + count |= (u64)(arg->bytes[i]) << ((length - 1 - (i - offset)) * 8); *value = count; out: |