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KVM: arm64: Convert MDCR_EL2 RES0 handling to compute_reg_res0_bits()

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While MDCR_EL2 cannot be RES0, convert it to the same infrastructure
anyway, as it make things cleaner.

Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2025-09-18 16:14:02 +01:00
parent d2a1d78ce5
commit ac53365990
1 changed files with 5 additions and 5 deletions
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10
arch/arm64/kvm/config.c
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@ -1162,6 +1162,9 @@ static const struct reg_bits_to_feat_map mdcr_el2_feat_map[] = {
FEAT_AA64EL1),
};
static const DECLARE_FEAT_MAP(mdcr_el2_desc, MDCR_EL2,
mdcr_el2_feat_map, FEAT_AA64EL2);
static void __init check_feat_map(const struct reg_bits_to_feat_map *map,
int map_size, u64 res0, const char *str)
{
@ -1204,8 +1207,7 @@ void __init check_feature_map(void)
check_reg_desc(&sctlr2_desc);
check_reg_desc(&tcr2_el2_desc);
check_reg_desc(&sctlr_el1_desc);
check_feat_map(mdcr_el2_feat_map, ARRAY_SIZE(mdcr_el2_feat_map),
MDCR_EL2_RES0, "MDCR_EL2");
check_reg_desc(&mdcr_el2_desc);
}
static bool idreg_feat_match(struct kvm *kvm, const struct reg_bits_to_feat_map *map)
@ -1417,9 +1419,7 @@ void get_reg_fixed_bits(struct kvm *kvm, enum vcpu_sysreg reg, u64 *res0, u64 *r
*res1 = SCTLR_EL1_RES1;
break;
case MDCR_EL2:
*res0 = compute_res0_bits(kvm, mdcr_el2_feat_map,
ARRAY_SIZE(mdcr_el2_feat_map), 0, 0);
*res0 |= MDCR_EL2_RES0;
*res0 = compute_reg_res0_bits(kvm, &mdcr_el2_desc, 0, 0);
*res1 = MDCR_EL2_RES1;
break;
default: