diff mbox series

[03/17] arm64: cpufeature: Add cpucap for PMICNTR

Message ID 20250602192702.2125115-4-coltonlewis@google.com
State New
Headers show
Series ARM64 PMU Partitioning | expand

Commit Message

Colton Lewis June 2, 2025, 7:26 p.m. UTC 
Add a cpucap for FEAT_PMUv3_PMICNTR, meaning there is a dedicated
instruction counter as well as the cycle counter.

Signed-off-by: Colton Lewis <coltonlewis@google.com>
---
 arch/arm64/kernel/cpufeature.c | 7 +++++++
 arch/arm64/tools/cpucaps       | 1 +
 2 files changed, 8 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 578eea321a60..e798a706d8fb 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2892,6 +2892,13 @@  static const struct arm64_cpu_capabilities arm64_features[] = {
 		.matches = has_cpuid_feature,
 		ARM64_CPUID_FIELDS(ID_AA64DFR0_EL1, HPMN0, IMP)
 	},
+	{
+		.desc = "PMU Dedicated Instruction Counter",
+		.type = ARM64_CPUCAP_SYSTEM_FEATURE,
+		.capability = ARM64_HAS_PMICNTR,
+		.matches = has_cpuid_feature,
+		ARM64_CPUID_FIELDS(ID_AA64DFR1_EL1, PMICNTR, IMP)
+	},
 #ifdef CONFIG_ARM64_SME
 	{
 		.desc = "Scalable Matrix Extension",
diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps
index 5b196ba21629..6dd72fcdd612 100644
--- a/arch/arm64/tools/cpucaps
+++ b/arch/arm64/tools/cpucaps
@@ -47,6 +47,7 @@  HAS_LSE_ATOMICS
 HAS_MOPS
 HAS_NESTED_VIRT
 HAS_PAN
+HAS_PMICNTR
 HAS_PMUV3
 HAS_S1PIE
 HAS_S1POE