On Thu, Nov 02, 2017 at 01:31:38AM -0700, Wanpeng Li wrote: > From: Wanpeng Li <[email protected]> > > According to the SDM, if the "load IA32_BNDCFGS" VM-entry controls is 1, the > following checks are performed on the field for the IA32_BNDCFGS MSR: > - Bits reserved in the IA32_BNDCFGS MSR must be 0. > - The linear address in bits 63:12 must be canonical. > > Cc: Paolo Bonzini <[email protected]> > Cc: Radim Krčmář <[email protected]> > Cc: Jim Mattson <[email protected]> > Signed-off-by: Wanpeng Li <[email protected]>
Reviewed-by: Konrad Rzeszutek Wilk <[email protected]> > --- > arch/x86/kvm/vmx.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c > index e6c8ffa..f29f57d 100644 > --- a/arch/x86/kvm/vmx.c > +++ b/arch/x86/kvm/vmx.c > @@ -10805,6 +10805,13 @@ static int check_vmentry_postreqs(struct kvm_vcpu > *vcpu, struct vmcs12 *vmcs12, > return 1; > } > > + if (kvm_mpx_supported() && > + (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS)) { > + if (is_noncanonical_address(vmcs12->guest_bndcfgs & PAGE_MASK, > vcpu) || > + (vmcs12->guest_bndcfgs & MSR_IA32_BNDCFGS_RSVD)) > + return 1; > + } > + > return 0; > } > > -- > 2.7.4 >
