From: Wanpeng Li <wanpeng.li@xxxxxxxxxxx> 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. Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx> Cc: Jim Mattson <jmattson@xxxxxxxxxx> Signed-off-by: Wanpeng Li <wanpeng.li@xxxxxxxxxxx> --- v3 -> v4: * simply condition * use && instead of nested "if"s arch/x86/kvm/vmx.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e6c8ffa..6cf3972 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -10805,6 +10805,11 @@ static int check_vmentry_postreqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12, return 1; } + if (kvm_mpx_supported() && + (is_noncanonical_address(vmcs12->guest_bndcfgs & PAGE_MASK, vcpu) || + (vmcs12->guest_bndcfgs & MSR_IA32_BNDCFGS_RSVD))) + return 1; + return 0; } -- 2.7.4
