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]> --- 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
