diff mbox series

[v5,01/16] perf/x86/intel: Add EPT-Friendly PEBS for Ice Lake Server

Message ID 20210415032016.166201-2-like.xu@linux.intel.com (mailing list archive)
State New
Headers show
Series KVM: x86/pmu: Add basic support to enable guest PEBS via DS | expand

Commit Message

Like Xu April 15, 2021, 3:20 a.m. UTC
The new hardware facility supporting guest PEBS is only available
on Intel Ice Lake Server platforms for now. KVM will check this field
through perf_get_x86_pmu_capability() instead of hard coding the cpu
models in the KVM code. If it is supported, the guest PBES capability
will be exposed to the guest.

Signed-off-by: Like Xu <like.xu@linux.intel.com>
---
 arch/x86/events/core.c            | 1 +
 arch/x86/events/intel/core.c      | 1 +
 arch/x86/events/perf_event.h      | 3 ++-
 arch/x86/include/asm/perf_event.h | 1 +
 4 files changed, 5 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 18df17129695..06bef6ba8a9b 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2776,5 +2776,6 @@  void perf_get_x86_pmu_capability(struct x86_pmu_capability *cap)
 	cap->bit_width_fixed	= x86_pmu.cntval_bits;
 	cap->events_mask	= (unsigned int)x86_pmu.events_maskl;
 	cap->events_mask_len	= x86_pmu.events_mask_len;
+	cap->pebs_vmx		= x86_pmu.pebs_vmx;
 }
 EXPORT_SYMBOL_GPL(perf_get_x86_pmu_capability);
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 7bbb5bb98d8c..591d60cc8436 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -5574,6 +5574,7 @@  __init int intel_pmu_init(void)
 
 	case INTEL_FAM6_ICELAKE_X:
 	case INTEL_FAM6_ICELAKE_D:
+		x86_pmu.pebs_vmx = 1;
 		pmem = true;
 		fallthrough;
 	case INTEL_FAM6_ICELAKE_L:
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index 53b2b5fc23bc..85dc4e1d4514 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -729,7 +729,8 @@  struct x86_pmu {
 			pebs_prec_dist		:1,
 			pebs_no_tlb		:1,
 			pebs_no_isolation	:1,
-			pebs_block		:1;
+			pebs_block		:1,
+			pebs_vmx		:1;
 	int		pebs_record_size;
 	int		pebs_buffer_size;
 	int		max_pebs_events;
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 544f41a179fb..6a6e707905be 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -192,6 +192,7 @@  struct x86_pmu_capability {
 	int		bit_width_fixed;
 	unsigned int	events_mask;
 	int		events_mask_len;
+	unsigned int	pebs_vmx	:1;
 };
 
 /*