From 333804dc3b7a92158ab63a48febff0d8ef89ada3 Mon Sep 17 00:00:00 2001 From: Madhavan Srinivasan Date: Sun, 9 Dec 2018 14:55:35 +0530 Subject: powerpc/perf: Update perf_regs structure to include SIER On each sample, Sample Instruction Event Register (SIER) content is saved in pt_regs. SIER does not have a entry as-is in the pt_regs but instead, SIER content is saved in the "dar" register of pt_regs. Patch adds another entry to the perf_regs structure to include the "SIER" printing which internally maps to the "dar" of pt_regs. It also check for the SIER availability in the platform and present value accordingly Signed-off-by: Madhavan Srinivasan Signed-off-by: Michael Ellerman --- arch/powerpc/perf/core-book3s.c | 8 ++++++++ arch/powerpc/perf/perf_regs.c | 7 +++++++ 2 files changed, 15 insertions(+) (limited to 'arch/powerpc/perf') diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c index 81f8a0c838ae..b4976cae1005 100644 --- a/arch/powerpc/perf/core-book3s.c +++ b/arch/powerpc/perf/core-book3s.c @@ -130,6 +130,14 @@ static inline void power_pmu_bhrb_read(struct cpu_hw_events *cpuhw) {} static void pmao_restore_workaround(bool ebb) { } #endif /* CONFIG_PPC32 */ +bool is_sier_available(void) +{ + if (ppmu->flags & PPMU_HAS_SIER) + return true; + + return false; +} + static bool regs_use_siar(struct pt_regs *regs) { /* diff --git a/arch/powerpc/perf/perf_regs.c b/arch/powerpc/perf/perf_regs.c index 09ceea6175ba..5c36b3a8d47a 100644 --- a/arch/powerpc/perf/perf_regs.c +++ b/arch/powerpc/perf/perf_regs.c @@ -69,6 +69,7 @@ static unsigned int pt_regs_offset[PERF_REG_POWERPC_MAX] = { PT_REGS_OFFSET(PERF_REG_POWERPC_TRAP, trap), PT_REGS_OFFSET(PERF_REG_POWERPC_DAR, dar), PT_REGS_OFFSET(PERF_REG_POWERPC_DSISR, dsisr), + PT_REGS_OFFSET(PERF_REG_POWERPC_SIER, dar), }; u64 perf_reg_value(struct pt_regs *regs, int idx) @@ -76,6 +77,12 @@ u64 perf_reg_value(struct pt_regs *regs, int idx) if (WARN_ON_ONCE(idx >= PERF_REG_POWERPC_MAX)) return 0; + if (idx == PERF_REG_POWERPC_SIER && + (IS_ENABLED(CONFIG_FSL_EMB_PERF_EVENT) || + IS_ENABLED(CONFIG_PPC32) || + !is_sier_available())) + return 0; + return regs_get_register(regs, pt_regs_offset[idx]); } -- cgit v1.2.3