From: Oliver Upton Date: Tue, 8 Jul 2025 17:25:07 +0000 (-0700) Subject: arm64: Detect FEAT_DoubleFault2 X-Git-Tag: io_uring-6.17-20250815~113^2~3^2~7^2~31 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=e3fd66620f10cddfcfe062404cf0ed170133bb43;p=linux-block.git 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 --- diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index b85be598cb17..72ccf9ed4d05 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),