diff options
| author | Joseph Cihula <joseph.cihula@intel.com> | 2011-02-08 11:45:56 -0800 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2011-03-17 13:08:30 -0300 |
| commit | 23f3e99132aa5c5f887648c50597d8f2b5800417 (patch) | |
| tree | 5b1d2b1c40fb935c86d59be3ec8a598effd077f9 /arch | |
| parent | e935b8372cf8c63dc618a9f2b24ab360a225f1cd (diff) | |
KVM: VMX: fix detection of BIOS disabling VMX
This patch fixes the logic used to detect whether BIOS has disabled VMX, for
the case where VMX is enabled only under SMX, but tboot is not active.
Signed-off-by: Joseph Cihula <joseph.cihula@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index ae4f02d4709..f76137ce71c 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1333,19 +1333,25 @@ static __init int vmx_disabled_by_bios(void) rdmsrl(MSR_IA32_FEATURE_CONTROL, msr); if (msr & FEATURE_CONTROL_LOCKED) { + /* launched w/ TXT and VMX disabled */ if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) && tboot_enabled()) return 1; + /* launched w/o TXT and VMX only enabled w/ TXT */ if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) + && (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX) && !tboot_enabled()) { printk(KERN_WARNING "kvm: disable TXT in the BIOS or " - " activate TXT before enabling KVM\n"); + "activate TXT before enabling KVM\n"); return 1; } + /* launched w/o TXT and VMX disabled */ + if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX) + && !tboot_enabled()) + return 1; } return 0; - /* locked but not enabled */ } static void kvm_cpu_vmxon(u64 addr) |