From: Paolo Bonzini pbonzini@redhat.com
commit f7eea636c3d505fe6f1d1066234f1aaf7171b681 upstream.
The implementation of vmread to memory is still incomplete, as it lacks the ability to do vmread to I/O memory just like vmptrst.
Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/x86/kvm/vmx/nested.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -4411,6 +4411,7 @@ static int handle_vmread(struct kvm_vcpu int len; gva_t gva = 0; struct vmcs12 *vmcs12; + struct x86_exception e;
if (!nested_vmx_check_permission(vcpu)) return 1; @@ -4451,7 +4452,8 @@ static int handle_vmread(struct kvm_vcpu vmx_instruction_info, true, len, &gva)) return 1; /* _system ok, nested_vmx_check_permission has verified cpl=0 */ - kvm_write_guest_virt_system(vcpu, gva, &field_value, len, NULL); + if (kvm_write_guest_virt_system(vcpu, gva, &field_value, len, &e)) + kvm_inject_page_fault(vcpu, &e); }
return nested_vmx_succeed(vcpu);