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| author | Peter Feiner | 2017-07-01 02:26:30 +0200 |
|---|---|---|
| committer | Paolo Bonzini | 2017-07-03 10:43:31 +0200 |
| commit | dcdca5fed5f6ef2521f927ba3b5cd6b328054be1 (patch) | |
| tree | 3b75f3d0972d24d532ac11c5f1c73b686649f48c /arch/x86/kvm/vmx.c | |
| parent | x86: kvm: mmu: dead code thanks to access tracking (diff) | |
| download | kernel-qcow2-linux-dcdca5fed5f6ef2521f927ba3b5cd6b328054be1.tar.gz kernel-qcow2-linux-dcdca5fed5f6ef2521f927ba3b5cd6b328054be1.tar.xz kernel-qcow2-linux-dcdca5fed5f6ef2521f927ba3b5cd6b328054be1.zip | |
x86: kvm: mmu: make spte mmio mask more explicit
Specify both a mask (i.e., bits to consider) and a value (i.e.,
pattern of bits that indicates a special PTE) for mmio SPTEs. On
Intel, this lets us pack even more information into the
(SPTE_SPECIAL_MASK | EPT_VMX_RWX_MASK) mask we use for access
tracking liberating all (SPTE_SPECIAL_MASK | (non-misconfigured-RWX))
values.
Signed-off-by: Peter Feiner <pfeiner@google.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 | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 92ddea08f999..b102a864e61f 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -5163,7 +5163,8 @@ static void ept_set_mmio_spte_mask(void) * EPT Misconfigurations can be generated if the value of bits 2:0 * of an EPT paging-structure entry is 110b (write/execute). */ - kvm_mmu_set_mmio_spte_mask(VMX_EPT_MISCONFIG_WX_VALUE); + kvm_mmu_set_mmio_spte_mask(VMX_EPT_RWX_MASK, + VMX_EPT_MISCONFIG_WX_VALUE); } #define VMX_XSS_EXIT_BITMAP 0 |