Commit e3fd6662 authored by Oliver Upton's avatar Oliver Upton
Browse files

arm64: Detect FEAT_DoubleFault2 



KVM will soon support FEAT_DoubleFault2. Add a descriptor for the
corresponding ID register field.

Reviewed-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250708172532.1699409-3-oliver.upton@linux.dev


Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
parent bf49e73d

arch/arm64/kernel/cpufeature.c

+1 −0
Original line number Diff line number Diff line
@@ -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),