i386: Add support for Intel SGX

[Qemu-devel] [RFC PATCH 09/20] i386: Add feature control MSR dependency when SGX is enabled

Sean Christopherson posted 20 patches 6 years, 1 month ago

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Maintainers: Eric Blake <eblake@redhat.com>, Cornelia Huck <cohuck@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Richard Henderson <rth@twiddle.net>, Igor Mammedov <imammedo@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Markus Armbruster <armbru@redhat.com>

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[Qemu-devel] [RFC PATCH 09/20] i386: Add feature control MSR dependency when SGX is enabled

Posted by Sean Christopherson 6 years, 1 month ago

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

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 target/i386/kvm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 07565820bd..e40c4fd673 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -1657,6 +1657,11 @@ 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;
     }
-- 
2.22.0