KVM_PGTABLE_PROT_UX
KVM_PGTABLE_PROT_UX,
prot &= ~KVM_PGTABLE_PROT_UX;
if (!(prot & KVM_PGTABLE_PROT_UX))
prot |= KVM_PGTABLE_PROT_UX;
ux = prot & KVM_PGTABLE_PROT_UX;
prot |= KVM_PGTABLE_PROT_PX | KVM_PGTABLE_PROT_UX;
prot |= KVM_PGTABLE_PROT_UX;
*prot &= ~KVM_PGTABLE_PROT_UX;