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ANDROID: KVM: arm64: Disable relinquish for p-guest huge-mappings

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Memory relinquish with huge stage-2 mappings is currently utterly borken
as we can't page-fault a half reclaimed huge mapping. Prevent it until
it is fixed.

Bug: 419548963
Change-Id: I7256042ed8392997dc488199c494cb9984270e24
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
This commit is contained in:
Vincent Donnefort
2025-03-13 17:00:02 +00:00
parent 549ac47ca0
commit 16df80ab9c
1 changed files with 4 additions and 0 deletions
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4
arch/arm64/kvm/hyp/nvhe/mem_protect.c
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@@ -387,6 +387,10 @@ static int relinquish_walker(const struct kvm_pgtable_visit_ctx *ctx,
if (!kvm_pte_valid(pte))
return 0;
/* We don't support splitting non-leaf mappings */
if (ctx->level != (KVM_PGTABLE_MAX_LEVELS - 1))
return 0;
state = pkvm_getstate(kvm_pgtable_stage2_pte_prot(pte));
if (state != data->expected_state)
return -EPERM;