From 84b0c8c6a6f87b62bca93727dee12ec59e32e597 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Sun, 14 Mar 2010 10:16:40 +0200 Subject: [PATCH] KVM: MMU: Disassociate direct maps from guest levels Direct maps are linear translations for a section of memory, used for real mode or with large pages. As such, they are independent of the guest levels. Teach the mmu about this by making page->role.glevels = 0 for direct maps. This allows direct maps to be shared among real mode and the various paging modes. Signed-off-by: Avi Kivity --- arch/x86/kvm/mmu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 83d2ebce9ea9..1cc60d3f445b 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1329,6 +1329,8 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, role = vcpu->arch.mmu.base_role; role.level = level; role.direct = direct; + if (role.direct) + role.glevels = 0; role.access = access; if (vcpu->arch.mmu.root_level <= PT32_ROOT_LEVEL) { quadrant = gaddr >> (PAGE_SHIFT + (PT64_PT_BITS * level));