[1/5] KVM: x86/mmu: Fix wrong gfn range of tlb flushing in validate_direct_spte()

Commit Message

Hou Wenlong June 24, 2022, 3:36 a.m. UTC

The spte pointing to the children SP is dropped, so the whole gfn range
covered by the children SP should be flushed.

Fixes: c3134ce240eed ("KVM: Replace old tlb flush function with new one to flush a specified range.")
Signed-off-by: Hou Wenlong <[e-mail]>
---
 arch/x86/kvm/mmu/mmu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Patch

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 79c6a821ea0d..b8a1f5b46b9d 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -2333,7 +2333,8 @@  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_with_address(vcpu->kvm, child->gfn,
+				KVM_PAGES_PER_HPAGE(child->role.level + 1));
 	}
 }