Re: [PATCH v10 10/40] arm64/cpufeature: Runtime detection of Guarded Control Stack (GCS)

On Thu, Aug 01, 2024 at 01:06:37PM +0100, Mark Brown wrote:

@@ -2870,6 +2872,13 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_nv1, ARM64_CPUID_FIELDS_NEG(ID_AA64MMFR4_EL1, E2H0, NI_NV1) },

• {

• .desc = "Guarded Control Stack (GCS)",
  

• .capability = ARM64_HAS_GCS,
  

• .type = ARM64_CPUCAP_SYSTEM_FEATURE,
  

Given that it's for user space only, system feature makes sense.

Reviewed-by: Catalin Marinas catalin.marinas@arm.com