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| author | Bandan Das | 2016-07-13 00:18:49 +0200 |
|---|---|---|
| committer | Paolo Bonzini | 2016-07-14 09:03:14 +0200 |
| commit | ffb128c89b77b44da18ccf51844a8e750e2c427a (patch) | |
| tree | 2343268f9b507a99abf34bf20d99b1158488b67e /arch/x86/kvm/x86.c | |
| parent | kvm: mmu: remove is_present_gpte() (diff) | |
| download | kernel-qcow2-linux-ffb128c89b77b44da18ccf51844a8e750e2c427a.tar.gz kernel-qcow2-linux-ffb128c89b77b44da18ccf51844a8e750e2c427a.tar.xz kernel-qcow2-linux-ffb128c89b77b44da18ccf51844a8e750e2c427a.zip | |
kvm: mmu: don't set the present bit unconditionally
To support execute only mappings on behalf of L1
hypervisors, we need to teach set_spte() to honor all three of
L1's XWR bits. As a start, add a new variable "shadow_present_mask"
that will be set for non-EPT shadow paging and clear for EPT.
Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index bb6e8bfaee3b..0c1fbb8d9d11 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5878,8 +5878,8 @@ int kvm_arch_init(void *opaque) kvm_x86_ops = ops; kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, - PT_DIRTY_MASK, PT64_NX_MASK, 0); - + PT_DIRTY_MASK, PT64_NX_MASK, 0, + PT_PRESENT_MASK); kvm_timer_init(); perf_register_guest_info_callbacks(&kvm_guest_cbs); |