[PATCH v1 03/20] arm64: cpufeature: add Permission Overlay Extension cpucap

[Joey Gouly]

This indicates if the system supports POE. This is a CPUCAP_BOOT_CPU_FEATURE
as the boot CPU will enable POE if it has it, so secondary CPUs must also
have this feature.

Signed-off-by: Joey Gouly <joey.go...@arm.com>
Cc: Catalin Marinas <catalin.mari...@arm.com>
Cc: Will Deacon <w...@kernel.org>
---
 arch/arm64/kernel/cpufeature.c | 7 +++++++
 arch/arm64/tools/cpucaps       | 1 +
 2 files changed, 8 insertions(+)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 444a73c2e638..902885f59396 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2719,6 +2719,13 @@ static const struct arm64_cpu_capabilities 
arm64_features[] = {
                .matches = has_cpuid_feature,
                ARM64_CPUID_FIELDS(ID_AA64MMFR2_EL1, EVT, IMP)
        },
+       {
+               .desc = "Stage-1 Permission Overlay Extension (S1POE)",
+               .capability = ARM64_HAS_S1POE,
+               .type = ARM64_CPUCAP_BOOT_CPU_FEATURE,
+               .matches = has_cpuid_feature,
+               ARM64_CPUID_FIELDS(ID_AA64MMFR3_EL1, S1POE, IMP)
+       },
        {},
 };
 
diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps
index c3f06fdef609..b8348e40f6d9 100644
--- a/arch/arm64/tools/cpucaps
+++ b/arch/arm64/tools/cpucaps
@@ -43,6 +43,7 @@ HAS_NO_FPSIMD
 HAS_NO_HW_PREFETCH
 HAS_PAN
 HAS_S1PIE
+HAS_S1POE
 HAS_RAS_EXTN
 HAS_RNG
 HAS_SB
-- 
2.25.1