diff options
Diffstat (limited to 'arch/x86/kvm/vmx/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 6c51438c7567..5518f75c9b19 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -4791,9 +4791,15 @@ static int handle_exception_nmi(struct kvm_vcpu *vcpu) if (is_page_fault(intr_info)) { cr2 = vmx_get_exit_qual(vcpu); - /* EPT won't cause page fault directly */ - WARN_ON_ONCE(!vcpu->arch.apf.host_apf_flags && enable_ept); - return kvm_handle_page_fault(vcpu, error_code, cr2, NULL, 0); + if (enable_ept && !vcpu->arch.apf.host_apf_flags) { + /* + * EPT will cause page fault only if we need to + * detect illegal GPAs. + */ + kvm_fixup_and_inject_pf_error(vcpu, cr2, error_code); + return 1; + } else + return kvm_handle_page_fault(vcpu, error_code, cr2, NULL, 0); } ex_no = intr_info & INTR_INFO_VECTOR_MASK; @@ -5309,6 +5315,18 @@ static int handle_ept_violation(struct kvm_vcpu *vcpu) PFERR_GUEST_FINAL_MASK : PFERR_GUEST_PAGE_MASK; vcpu->arch.exit_qualification = exit_qualification; + + /* + * Check that the GPA doesn't exceed physical memory limits, as that is + * a guest page fault. We have to emulate the instruction here, because + * if the illegal address is that of a paging structure, then + * EPT_VIOLATION_ACC_WRITE bit is set. Alternatively, if supported we + * would also use advanced VM-exit information for EPT violations to + * reconstruct the page fault error code. + */ + if (unlikely(kvm_mmu_is_illegal_gpa(vcpu, gpa))) + return kvm_emulate_instruction(vcpu, 0); + return kvm_mmu_page_fault(vcpu, gpa, error_code, NULL, 0); } |