arm64: cpufeature: add TCR2 cpucap

This capability indicates if the system supports the TCR2_ELx system register. Signed-off-by: Joey Gouly <joey.gouly@arm.com> Cc: Will Deacon <will@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20230606145859.697944-7-joey.gouly@arm.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
mariux64 · Jun 6, 2023 · 2b76004 · 2b76004
1 parent edc2589
commit 2b76004
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diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
@@ -2674,6 +2674,12 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
 		.cpu_enable = cpu_enable_mops,
 		ARM64_CPUID_FIELDS(ID_AA64ISAR2_EL1, MOPS, IMP)
 	},
+	{
+		.capability = ARM64_HAS_TCR2,
+		.type = ARM64_CPUCAP_SYSTEM_FEATURE,
+		.matches = has_cpuid_feature,
+		ARM64_CPUID_FIELDS(ID_AA64MMFR3_EL1, TCRX, IMP)
+	},
 	{},
 };
 

diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps
@@ -44,6 +44,7 @@ HAS_RAS_EXTN
 HAS_RNG
 HAS_SB
 HAS_STAGE2_FWB
+HAS_TCR2
 HAS_TIDCP1
 HAS_TLB_RANGE
 HAS_VIRT_HOST_EXTN