diff options
Diffstat (limited to 'arch/x86/kvm/paging_tmpl.h')
| -rw-r--r-- | arch/x86/kvm/paging_tmpl.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index fda5b64ae8f1..a01105485315 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -181,13 +181,19 @@ no_present: return true; } +/* + * For PTTYPE_EPT, a page table can be executable but not readable + * on supported processors. Therefore, set_spte does not automatically + * set bit 0 if execute only is supported. Here, we repurpose ACC_USER_MASK + * to signify readability since it isn't used in the EPT case + */ static inline unsigned FNAME(gpte_access)(struct kvm_vcpu *vcpu, u64 gpte) { unsigned access; #if PTTYPE == PTTYPE_EPT access = ((gpte & VMX_EPT_WRITABLE_MASK) ? ACC_WRITE_MASK : 0) | ((gpte & VMX_EPT_EXECUTABLE_MASK) ? ACC_EXEC_MASK : 0) | - ACC_USER_MASK; + ((gpte & VMX_EPT_READABLE_MASK) ? ACC_USER_MASK : 0); #else BUILD_BUG_ON(ACC_EXEC_MASK != PT_PRESENT_MASK); BUILD_BUG_ON(ACC_EXEC_MASK != 1); |