From 8184dd38e22fcaec664c2b98c382b85c26780e26 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Thu, 27 May 2010 14:22:51 +0300 Subject: [PATCH] KVM: MMU: Allow spte.w=1 for gpte.w=0 and cr0.wp=0 only in shadow mode When tdp is enabled, the guest's cr0.wp shouldn't have any effect on spte permissions. Signed-off-by: Avi Kivity --- arch/x86/kvm/mmu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 9f4be01..69d40a6 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1882,7 +1882,8 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep, spte |= (u64)pfn << PAGE_SHIFT; if ((pte_access & ACC_WRITE_MASK) - || (write_fault && !is_write_protection(vcpu) && !user_fault)) { + || (!tdp_enabled && write_fault && !is_write_protection(vcpu) + && !user_fault)) { if (level > PT_PAGE_TABLE_LEVEL && has_wrprotected_page(vcpu->kvm, gfn, level)) { -- 2.7.4