diff options
| author | Bandan Das <bsd@redhat.com> | 2016-07-13 01:18:49 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-07-14 10:03:14 +0300 |
| commit | ffb128c89b77b44da18ccf51844a8e750e2c427a (patch) | |
| tree | 2343268f9b507a99abf34bf20d99b1158488b67e /arch/x86/kvm/vmx.c | |
| parent | 812f30b234539ccb0139f92dfdbec1e8158cf535 (diff) | |
| download | linux-ffb128c89b77b44da18ccf51844a8e750e2c427a.tar.xz | |
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/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e51503063181..a75d09d2a799 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -6473,6 +6473,7 @@ static __init int hardware_setup(void) (enable_ept_ad_bits) ? VMX_EPT_ACCESS_BIT : 0ull, (enable_ept_ad_bits) ? VMX_EPT_DIRTY_BIT : 0ull, 0ull, VMX_EPT_EXECUTABLE_MASK); + 0ull, VMX_EPT_EXECUTABLE_MASK, VMX_EPT_READABLE_MASK); ept_set_mmio_spte_mask(); kvm_enable_tdp(); } else |