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KVM: arm64: Expand valid block mappings to FEAT_LPA/LPA2 support

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With 52bit PAs, block mappings can exist at different levels (such
as level 0 for 4kB pages, or level 1 for 16kB and 64kB pages).

Account for this in walk_s1().

Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2025-07-28 16:29:56 +01:00
parent dd82412c2b
commit 5da3a3b27a
1 changed files with 2 additions and 2 deletions
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4
arch/arm64/kvm/at.c
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@ -448,11 +448,11 @@ static int walk_s1(struct kvm_vcpu *vcpu, struct s1_walk_info *wi,
switch (BIT(wi->pgshift)) {
case SZ_4K:
valid_block = level == 1 || level == 2;
valid_block = level == 1 || level == 2 || (wi->pa52bit && level == 0);
break;
case SZ_16K:
case SZ_64K:
valid_block = level == 2;
valid_block = level == 2 || (wi->pa52bit && level == 1);
break;
}