Re: [PATCH V4 09/17] arm64/cpufeature: Add remaining feature bits in ID_AA64ISAR0 register

Enable TLB features bit in ID_AA64ISAR0 register as per ARM DDI 0487F.a
specification.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org

Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Anshuman Khandual <redacted>
---
  arch/arm64/include/asm/sysreg.h | 1 +
  arch/arm64/kernel/cpufeature.c  | 1 +
  2 files changed, 2 insertions(+)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 0a0cbb3add89..ea075cc08c8f 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h

@@ -601,6 +601,7 @@
  
  /* id_aa64isar0 */
  #define ID_AA64ISAR0_RNDR_SHIFT		60
+#define ID_AA64ISAR0_TLB_SHIFT		56
  #define ID_AA64ISAR0_TS_SHIFT		52
  #define ID_AA64ISAR0_FHM_SHIFT		48
  #define ID_AA64ISAR0_DP_SHIFT		44

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 92186c40b817..ed0c400155c9 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c

@@ -179,6 +179,7 @@ static bool __system_matches_cap(unsigned int n);
   */
  static const struct arm64_ftr_bits ftr_id_aa64isar0[] = {
  	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_RNDR_SHIFT, 4, 0),
+	ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_TLB_SHIFT, 4, 0),
  	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_TS_SHIFT, 4, 0),
  	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_FHM_SHIFT, 4, 0),
  	ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR0_DP_SHIFT, 4, 0),