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KVM: x86/mmu: Fix wrong gfn range of tlb flushing in validate_direct_spte()

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The spte pointing to the children SP is dropped, so the whole gfn range
covered by the children SP should be flushed. Although, Hyper-V may
treat a 1-page flush the same if the address points to a huge page, it
still would be better to use the correct size of huge page.

Fixes: c3134ce240 ("KVM: Replace old tlb flush function with new one to flush a specified range.")
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com>
Link: https://lore.kernel.org/r/5f297c566f7d7ff2ea6da3c66d050f69ce1b8ede.1665214747.git.houwenlong.hwl@antgroup.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Hou Wenlong
2022-10-10 20:19:16 +08:00
committed by Sean Christopherson
parent 1b2dc73604
commit 3cdf93746f
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/mmu/mmu.c
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@@ -2414,7 +2414,7 @@ static void validate_direct_spte(struct kvm_vcpu *vcpu, u64 *sptep,
return;
drop_parent_pte(child, sptep);
kvm_flush_remote_tlbs_with_address(vcpu->kvm, child->gfn, 1);
kvm_flush_remote_tlbs_sptep(vcpu->kvm, sptep);
}
}