diff options
| author | Kan Liang <kan.liang@linux.intel.com> | 2021-04-12 17:30:50 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-04-19 21:03:26 +0300 |
| commit | 183af7366b4e813ee4e0b995ff731e3ac28251f0 (patch) | |
| tree | 8e59b0656dd2e43633b29f77e4f6d4d3a15fd2ad /arch/x86/events/intel | |
| parent | 24ee38ffe61a68fc35065fcab1908883a34c866b (diff) | |
| download | linux-183af7366b4e813ee4e0b995ff731e3ac28251f0.tar.xz | |
perf/x86: Hybrid PMU support for extra_regs
Different hybrid PMU may have different extra registers, e.g. Core PMU
may have offcore registers, frontend register and ldlat register. Atom
core may only have offcore registers and ldlat register. Each hybrid PMU
should use its own extra_regs.
An Intel Hybrid system should always have extra registers.
Unconditionally allocate shared_regs for Intel Hybrid system.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Link: https://lkml.kernel.org/r/1618237865-33448-11-git-send-email-kan.liang@linux.intel.com
Diffstat (limited to 'arch/x86/events/intel')
| -rw-r--r-- | arch/x86/events/intel/core.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index 447a80f88033..f727aa5dc095 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -2966,8 +2966,10 @@ intel_vlbr_constraints(struct perf_event *event) return NULL; } -static int intel_alt_er(int idx, u64 config) +static int intel_alt_er(struct cpu_hw_events *cpuc, + int idx, u64 config) { + struct extra_reg *extra_regs = hybrid(cpuc->pmu, extra_regs); int alt_idx = idx; if (!(x86_pmu.flags & PMU_FL_HAS_RSP_1)) @@ -2979,7 +2981,7 @@ static int intel_alt_er(int idx, u64 config) if (idx == EXTRA_REG_RSP_1) alt_idx = EXTRA_REG_RSP_0; - if (config & ~x86_pmu.extra_regs[alt_idx].valid_mask) + if (config & ~extra_regs[alt_idx].valid_mask) return idx; return alt_idx; @@ -2987,15 +2989,16 @@ static int intel_alt_er(int idx, u64 config) static void intel_fixup_er(struct perf_event *event, int idx) { + struct extra_reg *extra_regs = hybrid(event->pmu, extra_regs); event->hw.extra_reg.idx = idx; if (idx == EXTRA_REG_RSP_0) { event->hw.config &= ~INTEL_ARCH_EVENT_MASK; - event->hw.config |= x86_pmu.extra_regs[EXTRA_REG_RSP_0].event; + event->hw.config |= extra_regs[EXTRA_REG_RSP_0].event; event->hw.extra_reg.reg = MSR_OFFCORE_RSP_0; } else if (idx == EXTRA_REG_RSP_1) { event->hw.config &= ~INTEL_ARCH_EVENT_MASK; - event->hw.config |= x86_pmu.extra_regs[EXTRA_REG_RSP_1].event; + event->hw.config |= extra_regs[EXTRA_REG_RSP_1].event; event->hw.extra_reg.reg = MSR_OFFCORE_RSP_1; } } @@ -3071,7 +3074,7 @@ again: */ c = NULL; } else { - idx = intel_alt_er(idx, reg->config); + idx = intel_alt_er(cpuc, idx, reg->config); if (idx != reg->idx) { raw_spin_unlock_irqrestore(&era->lock, flags); goto again; @@ -4155,7 +4158,7 @@ int intel_cpuc_prepare(struct cpu_hw_events *cpuc, int cpu) { cpuc->pebs_record_size = x86_pmu.pebs_record_size; - if (x86_pmu.extra_regs || x86_pmu.lbr_sel_map) { + if (is_hybrid() || x86_pmu.extra_regs || x86_pmu.lbr_sel_map) { cpuc->shared_regs = allocate_shared_regs(cpu); if (!cpuc->shared_regs) goto err; |