KVM: arm64: Advertise support for FEAT_DoubleFault2

KVM's external abort injection now respects the exception routing
wreckage due to FEAT_DoubleFault2. Advertise the feature.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250708172532.1699409-23-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index b3e6a7034b6410a655ae98a014578fb822f56ce8..9d4fe892e8b4bdc107652713148044fd1e7847bf 100644 (file)
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1613,7 +1613,6 @@ static u64 __kvm_read_sanitised_id_reg(const struct kvm_vcpu *vcpu,
                val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_GCS);
                val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_THE);
                val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_MTEX);
-               val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_DF2);
                val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_PFAR);
                val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_MPAM_frac);
                break;
@@ -2884,7 +2883,6 @@ static const struct sys_reg_desc sys_reg_descs[] = {
                      ID_AA64PFR0_EL1_FP)),
        ID_FILTERED(ID_AA64PFR1_EL1, id_aa64pfr1_el1,
                                     ~(ID_AA64PFR1_EL1_PFAR |
-                                      ID_AA64PFR1_EL1_DF2 |
                                       ID_AA64PFR1_EL1_MTEX |
                                       ID_AA64PFR1_EL1_THE |
                                       ID_AA64PFR1_EL1_GCS |