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List: kvm-commits
Subject: [COMMIT master] KVM: VMX: Inform user about INTEL_TXT dependency
From: Avi Kivity <avi () redhat ! com>
Date: 2010-11-23 12:54:47
Message-ID: 20101123125447.0E96C250AF1 () cleopatra ! tlv ! redhat ! com
[Download RAW message or body]
From: Shane Wang <shane.wang@intel.com>
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>
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 0badeac..a9ad174 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1305,8 +1305,11 @@ 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;
--
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