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| author |   Avi Kivity <avi@redhat.com> | 2010-05-27 14:22:51 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-08-01 10:39:23 +0300 |
| commit | 8184dd38e22fcaec664c2b98c382b85c26780e26 (patch) | |
| tree | cf8c6dd4e1e2a2d04cb4d0dfee3b46b9c258937d /arch | |
| parent | KVM: x86: Propagate fpu_alloc errors (diff) | |
| download | linux-dev-8184dd38e22fcaec664c2b98c382b85c26780e26.tar.xz linux-dev-8184dd38e22fcaec664c2b98c382b85c26780e26.zip | |
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 <avi@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 9f4be0114bce..69d40a6e1e68 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)) { |