[PATCH 1/3] arm64/cpufeature: Add missing id_aa64mmfr4 feature reg update

[Yicong Yang]

From: Yicong Yang <yangyicong at hisilicon.com>

Add missing id_aa64mmfr4 feature register check and update in
update_cpu_features(). Update the taint status as well.

Signed-off-by: Yicong Yang <yangyicong at hisilicon.com>
---
 arch/arm64/kernel/cpufeature.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 9c4d6d552b25..75ef319c1ef8 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1403,6 +1403,8 @@ void update_cpu_features(int cpu,
 				      info->reg_id_aa64mmfr2, boot->reg_id_aa64mmfr2);
 	taint |= check_update_ftr_reg(SYS_ID_AA64MMFR3_EL1, cpu,
 				      info->reg_id_aa64mmfr3, boot->reg_id_aa64mmfr3);
+	taint |= check_update_ftr_reg(SYS_ID_AA64MMFR4_EL1, cpu,
+				      info->reg_id_aa64mmfr4, boot->reg_id_aa64mmfr4);
 
 	taint |= check_update_ftr_reg(SYS_ID_AA64PFR0_EL1, cpu,
 				      info->reg_id_aa64pfr0, boot->reg_id_aa64pfr0);
-- 
2.24.0