[v5] Qemu SGX virtualization

[PATCH v5 12/26] i386: Add feature control MSR dependency when SGX is enabled

Paolo Bonzini posted 26 patches 4 years, 4 months ago

Diff against v1 v1 v2 v3 v4
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Maintainers: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, David Hildenbrand <david@redhat.com>, Laurent Vivier <lvivier@redhat.com>, Markus Armbruster <armbru@redhat.com>, Eric Blake <eblake@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Ani Sinha <ani@anisinha.ca>, Marcelo Tosatti <mtosatti@redhat.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <ehabkost@redhat.com>, Thomas Huth <thuth@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Alex Williamson <alex.williamson@redhat.com>, Igor Mammedov <imammedo@redhat.com>, Peter Xu <peterx@redhat.com>

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[PATCH v5 12/26] i386: Add feature control MSR dependency when SGX is enabled

Posted by Paolo Bonzini 4 years, 4 months ago

From: Sean Christopherson <sean.j.christopherson@intel.com>

SGX adds multiple flags to FEATURE_CONTROL to enable SGX and Flexible
Launch Control.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-12-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/kvm/kvm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c
index 11551648f9..6dc40161e0 100644
--- a/target/i386/kvm/kvm.c
+++ b/target/i386/kvm/kvm.c
@@ -1877,6 +1877,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
                                   !!(c->ecx & CPUID_EXT_SMX);
     }
 
+    c = cpuid_find_entry(&cpuid_data.cpuid, 7, 0);
+    if (c && (c->ebx & CPUID_7_0_EBX_SGX)) {
+        has_msr_feature_control = true;
+    }
+
     if (env->mcg_cap & MCG_LMCE_P) {
         has_msr_mcg_ext_ctl = has_msr_feature_control = true;
     }
-- 
2.31.1