[Patch v4 08/13] perf/x86/intel: Update dyn_constranit base on PEBS event precise level

[Dapeng Mi]

arch-PEBS provides CPUIDs to enumerate which counters support PEBS
sampling and precise distribution PEBS sampling. Thus PEBS constraints
should be dynamically configured base on these counter and precise
distribution bitmap instead of defining them statically.

Update event dyn_constraint base on PEBS event precise level.

Signed-off-by: Dapeng Mi <dapeng1.mi@xxxxxxxxxxxxxxx>
---
 arch/x86/events/intel/core.c | 11 +++++++++++
 arch/x86/events/intel/ds.c   |  1 +
 2 files changed, 12 insertions(+)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 5e6ef9f3a077..00b41c693d13 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -4255,6 +4255,8 @@ static int intel_pmu_hw_config(struct perf_event *event)
 	}
 
 	if (event->attr.precise_ip) {
+		struct arch_pebs_cap pebs_cap = hybrid(event->pmu, arch_pebs_cap);
+
 		if ((event->attr.config & INTEL_ARCH_EVENT_MASK) == INTEL_FIXED_VLBR_EVENT)
 			return -EINVAL;
 
@@ -4268,6 +4270,15 @@ static int intel_pmu_hw_config(struct perf_event *event)
 		}
 		if (x86_pmu.pebs_aliases)
 			x86_pmu.pebs_aliases(event);
+
+		if (x86_pmu.arch_pebs) {
+			u64 cntr_mask = hybrid(event->pmu, intel_ctrl) &
+						~GLOBAL_CTRL_EN_PERF_METRICS;
+			u64 pebs_mask = event->attr.precise_ip >= 3 ?
+						pebs_cap.pdists : pebs_cap.counters;
+			if (cntr_mask != pebs_mask)
+				event->hw.dyn_constraint &= pebs_mask;
+		}
 	}
 
 	if (needs_branch_stack(event)) {
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index 72b925b8c482..30915338b929 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -2987,6 +2987,7 @@ static void __init intel_arch_pebs_init(void)
 	x86_pmu.pebs_buffer_size = PEBS_BUFFER_SIZE;
 	x86_pmu.drain_pebs = intel_pmu_drain_arch_pebs;
 	x86_pmu.pebs_capable = ~0ULL;
+	x86_pmu.flags |= PMU_FL_PEBS_ALL;
 
 	x86_pmu.pebs_enable = __intel_pmu_pebs_enable;
 	x86_pmu.pebs_disable = __intel_pmu_pebs_disable;
-- 
2.43.0