Commit 3cdf9374 authored by Hou Wenlong's avatar Hou Wenlong Committed by Sean Christopherson
Browse files

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



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: c3134ce2 ("KVM: Replace old tlb flush function with new one to flush a specified range.")
Suggested-by: default avatarSean Christopherson <seanjc@google.com>
Signed-off-by: default avatarHou Wenlong <houwenlong.hwl@antgroup.com>
Link: https://lore.kernel.org/r/5f297c566f7d7ff2ea6da3c66d050f69ce1b8ede.1665214747.git.houwenlong.hwl@antgroup.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 1b2dc736

arch/x86/kvm/mmu/mmu.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

	}

}