On Wed, Sep 27, 2023 at 03:01:10PM +0100, Joey Gouly wrote:
--- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -400,6 +400,7 @@ static const struct arm64_ftr_bits ftr_id_aa64mmfr2[] = { }; static const struct arm64_ftr_bits ftr_id_aa64mmfr3[] = {
- ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64MMFR3_EL1_S1POE_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64MMFR3_EL1_S1PIE_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_HIDDEN, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64MMFR3_EL1_TCRX_SHIFT, 4, 0), ARM64_FTR_END,
@@ -2220,6 +2221,12 @@ static void cpu_enable_mops(const struct arm64_cpu_capabilities *__unused) sysreg_clear_set(sctlr_el1, 0, SCTLR_EL1_MSCEn); } +static void cpu_enable_poe(const struct arm64_cpu_capabilities *__unused) +{
- sysreg_clear_set(REG_TCR2_EL1, 0, TCR2_EL1x_E0POE);
- sysreg_clear_set(CPACR_EL1, 0, CPACR_ELx_E0POE);
+}
/* Internal helper functions to match cpu capability type */ static bool cpucap_late_cpu_optional(const struct arm64_cpu_capabilities *cap) @@ -2724,6 +2731,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .capability = ARM64_HAS_S1POE, .type = ARM64_CPUCAP_BOOT_CPU_FEATURE, .matches = has_cpuid_feature,
ARM64_CPUID_FIELDS(ID_AA64MMFR3_EL1, S1POE, IMP) }, {},.cpu_enable = cpu_enable_poe,
diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
I'd also expect to see an update to arm64_elf_hwcaps[]?