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| author | Avi Kivity <avi@redhat.com> | 2010-03-14 09:16:40 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-05-17 11:16:44 +0200 |
| commit | 84b0c8c6a6f87b62bca93727dee12ec59e32e597 (patch) | |
| tree | 2ae71e4f9000ea90f8ed2dea192ffb4662fbc2eb | |
| parent | KVM: MMU: check reserved bits only if CR4.PSE=1 or CR4.PAE=1 (diff) | |
| download | linux-84b0c8c6a6f87b62bca93727dee12ec59e32e597.tar.xz linux-84b0c8c6a6f87b62bca93727dee12ec59e32e597.zip | |
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 <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/mmu.c | 2 |
1 files changed, 2 insertions, 0 deletions
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)); |