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>
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Reviewed-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
arch/arm64/kernel/cpufeature.c | 9 +++++++++
arch/arm64/tools/cpucaps | 1 +
2 files changed, 10 insertions(+)
diff --git arch/arm64/kernel/cpufeature.c arch/arm64/kernel/cpufeature.c
index 646ecd3069fd..2daf5597cd65 100644
--- arch/arm64/kernel/cpufeature.c
+++ arch/arm64/kernel/cpufeature.c
@@ -2870,6 +2870,15 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.matches = has_nv1,
ARM64_CPUID_FIELDS_NEG(ID_AA64MMFR4_EL1, E2H0, NI_NV1)
},
+#ifdef CONFIG_ARM64_POE
+ {
+ .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)
+ },
+#endif
{},
};
diff --git arch/arm64/tools/cpucaps arch/arm64/tools/cpucaps
index ac3429d892b9..eedb5acc21ed 100644
--- arch/arm64/tools/cpucaps
+++ arch/arm64/tools/cpucaps
@@ -45,6 +45,7 @@ HAS_MOPS
HAS_NESTED_VIRT
HAS_PAN
HAS_S1PIE
+HAS_S1POE
HAS_RAS_EXTN
HAS_RNG
HAS_SB
--
2.25.1
