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KVM: arm64: Stage-2 huge mappings for np-guests

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Now np-guests hypercalls with range are supported, we can let the
hypervisor to install block mappings whenever the Stage-1 allows it,
that is when backed by either Hugetlbfs or THPs. The size of those block
mappings is limited to PMD_SIZE.

Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Link: https://lore.kernel.org/r/20250521124834.1070650-10-vdonnefort@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Vincent Donnefort
2025-05-21 13:48:33 +01:00
committed by Marc Zyngier
parent 3669ddd8fa
commit db14091d8f
3 changed files with 20 additions and 11 deletions
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2
arch/arm64/kvm/pkvm.c
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@@ -351,7 +351,7 @@ int pkvm_pgtable_stage2_map(struct kvm_pgtable *pgt, u64 addr, u64 size,
u64 pfn = phys >> PAGE_SHIFT;
int ret;
if (size != PAGE_SIZE)
if (size != PAGE_SIZE && size != PMD_SIZE)
return -EINVAL;
lockdep_assert_held_write(&kvm->mmu_lock);