| From 05b29633c7a956d5675f5fbba70db0d26aa5e73e Mon Sep 17 00:00:00 2001 |
| From: Lai Jiangshan <laijs@linux.alibaba.com> |
| Date: Wed, 24 Nov 2021 20:20:46 +0800 |
| Subject: KVM: X86: Use vcpu->arch.walk_mmu for kvm_mmu_invlpg() |
| |
| From: Lai Jiangshan <laijs@linux.alibaba.com> |
| |
| commit 05b29633c7a956d5675f5fbba70db0d26aa5e73e upstream. |
| |
| INVLPG operates on guest virtual address, which are represented by |
| vcpu->arch.walk_mmu. In nested virtualization scenarios, |
| kvm_mmu_invlpg() was using the wrong MMU structure; if L2's invlpg were |
| emulated by L0 (in practice, it hardly happen) when nested two-dimensional |
| paging is enabled, the call to ->tlb_flush_gva() would be skipped and |
| the hardware TLB entry would not be invalidated. |
| |
| Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> |
| Message-Id: <20211124122055.64424-5-jiangshanlai@gmail.com> |
| Cc: stable@vger.kernel.org |
| Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| arch/x86/kvm/mmu/mmu.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/arch/x86/kvm/mmu/mmu.c |
| +++ b/arch/x86/kvm/mmu/mmu.c |
| @@ -5152,7 +5152,7 @@ EXPORT_SYMBOL_GPL(kvm_mmu_invalidate_gva |
| |
| void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva) |
| { |
| - kvm_mmu_invalidate_gva(vcpu, vcpu->arch.mmu, gva, INVALID_PAGE); |
| + kvm_mmu_invalidate_gva(vcpu, vcpu->arch.walk_mmu, gva, INVALID_PAGE); |
| ++vcpu->stat.invlpg; |
| } |
| EXPORT_SYMBOL_GPL(kvm_mmu_invlpg); |
