From e3fd66620f10cddfcfe062404cf0ed170133bb43 Mon Sep 17 00:00:00 2001 From: Oliver Upton Date: Tue, 8 Jul 2025 10:25:07 -0700 Subject: [PATCH] arm64: Detect FEAT_DoubleFault2 KVM will soon support FEAT_DoubleFault2. Add a descriptor for the corresponding ID register field. Reviewed-by: Marc Zyngier Link: https://lore.kernel.org/r/20250708172532.1699409-3-oliver.upton@linux.dev Signed-off-by: Oliver Upton --- arch/arm64/kernel/cpufeature.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index b85be598cb170..72ccf9ed4d052 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -303,6 +303,7 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr0[] = { }; static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = { + ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_EL1_DF2_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_VISIBLE_IF_IS_ENABLED(CONFIG_ARM64_GCS), FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_EL1_GCS_SHIFT, 4, 0), S_ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR1_EL1_MTE_frac_SHIFT, 4, 0), -- 2.47.2