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.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
--- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7247,6 +7247,7 @@ static int handle_vmread(struct kvm_vcpu unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO); gva_t gva = 0; + struct x86_exception e;
if (!nested_vmx_check_permission(vcpu) || !nested_vmx_check_vmcs12(vcpu)) @@ -7273,8 +7274,10 @@ static int handle_vmread(struct kvm_vcpu vmx_instruction_info, true, &gva)) return 1; /* _system ok, as nested_vmx_check_permission verified cpl=0 */ - kvm_write_guest_virt_system(vcpu, gva, &field_value, - (is_long_mode(vcpu) ? 8 : 4), NULL); + if (kvm_write_guest_virt_system(vcpu, gva, &field_value, + (is_long_mode(vcpu) ? 8 : 4), + NULL)) + kvm_inject_page_fault(vcpu, &e); }
nested_vmx_succeed(vcpu);