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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>
This commit is contained in:
Shane Wang 2010-11-17 11:40:17 +08:00 committed by Avi Kivity
parent 75b7127c38
commit f9335afea5
1 changed files with 4 additions and 1 deletions
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5
arch/x86/kvm/vmx.c
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@ -1305,8 +1305,11 @@ static __init int vmx_disabled_by_bios(void)
&& tboot_enabled()) && tboot_enabled())
return 1; return 1;
if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) 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 1;
}
} }
return 0; return 0;