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KVM: nVMX: Validate the IA32_BNDCFGS on nested VM-entry

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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@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Jim Mattson <jmattson@google.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
This commit is contained in:
Wanpeng Li 2017-11-05 16:54:48 -08:00 committed by Paolo Bonzini
parent 3853be2603
commit f1b026a331
1 changed files with 5 additions and 0 deletions
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5
arch/x86/kvm/vmx.c
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@ -10876,6 +10876,11 @@ static int check_vmentry_postreqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
return 1; return 1;
} }
if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS) &&
(is_noncanonical_address(vmcs12->guest_bndcfgs & PAGE_MASK, vcpu) ||
(vmcs12->guest_bndcfgs & MSR_IA32_BNDCFGS_RSVD)))
return 1;
return 0; return 0;
} }