Commit f9335afe authored Nov 17, 2010 by Shane Wang Committed by Avi Kivity Jan 12, 2011

KVM: VMX: Inform user about INTEL_TXT dependency



Inform user to either disable TXT in the BIOS or do TXT launch
with tboot before enabling KVM since some BIOSes do not set
FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX bit when TXT is enabled.

Signed-off-by: Shane Wang <shane.wang@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

parent 75b7127c

arch/x86/kvm/vmx.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -1305,9 +1305,12 @@ static __init int vmx_disabled_by_bios(void)
		&& tboot_enabled())
		return 1;
		if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
		&& !tboot_enabled())
		&& !tboot_enabled()) {
		printk(KERN_WARNING "kvm: disable TXT in the BIOS or "
		" activate TXT before enabling KVM\n");
		return 1;
		}
		}

		return 0;
		/* locked but not enabled */

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