[PATCH v3 06/20] arm64: cpufeature: add TCR2 cpucap

[Joey Gouly]

This capability indicates if the system supports the TCR2_ELx system register.

Signed-off-by: Joey Gouly <joey.gouly at arm.com>
Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Will Deacon <will at kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas at arm.com>
Reviewed-by: Mark Brown <broonie at kernel.org>
---
 arch/arm64/kernel/cpufeature.c | 10 ++++++++++
 arch/arm64/tools/cpucaps       |  1 +
 2 files changed, 11 insertions(+)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 675ccbc1edbd..fbfe58c0be6e 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -2652,6 +2652,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
 		.cpu_enable = cpu_enable_dit,
 		ARM64_CPUID_FIELDS(ID_AA64PFR0_EL1, DIT, IMP)
 	},
+	{
+		.capability = ARM64_HAS_TCR2,
+		.type = ARM64_CPUCAP_SYSTEM_FEATURE,
+		.sys_reg = SYS_ID_AA64MMFR3_EL1,
+		.sign = FTR_UNSIGNED,
+		.field_pos = ID_AA64MMFR3_EL1_TCRX_SHIFT,
+		.field_width = 4,
+		.min_field_value = ID_AA64MMFR3_EL1_TCRX_IMP,
+		.matches = has_cpuid_feature,
+	},
 	{},
 };
 
diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps
index 40ba95472594..a7d38e0c4573 100644
--- a/arch/arm64/tools/cpucaps
+++ b/arch/arm64/tools/cpucaps
@@ -42,6 +42,7 @@ HAS_RAS_EXTN
 HAS_RNG
 HAS_SB
 HAS_STAGE2_FWB
+HAS_TCR2
 HAS_TIDCP1
 HAS_TLB_RANGE
 HAS_VIRT_HOST_EXTN
-- 
2.25.1