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.gouly@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
---
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
