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KVM: VMX: Check for full VMX support when verifying CPU compatibility
Explicitly check the current CPU's IA32_FEAT_CTL and VMX feature flags when verifying compatibility across physical CPUs. This effectively adds a check on IA32_FEAT_CTL to ensure that VMX is fully enabled on all CPUs. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20191221044513.21680-17-sean.j.christopherson@intel.com
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@ -6838,6 +6838,12 @@ static int __init vmx_check_processor_compat(void)
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struct vmcs_config vmcs_conf;
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struct vmx_capability vmx_cap;
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if (!this_cpu_has(X86_FEATURE_MSR_IA32_FEAT_CTL) ||
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!this_cpu_has(X86_FEATURE_VMX)) {
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pr_err("kvm: VMX is disabled on CPU %d\n", smp_processor_id());
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return -EIO;
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}
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if (setup_vmcs_config(&vmcs_conf, &vmx_cap) < 0)
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return -EIO;
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if (nested)
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