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i386: Propagate SGX CPUID sub-leafs to KVM 

The SGX sub-leafs are enumerated at CPUID 0x12.  Indices 0 and 1 are
always present when SGX is supported, and enumerate SGX features and
capabilities.  Indices >=2 are directly correlated with the platform's
EPC sections.  Because the number of EPC sections is dynamic and user
defined, the number of SGX sub-leafs is "NULL" terminated.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-15-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-07-19 19:21:17 +08:00 committed by Paolo Bonzini
parent c22f546785
commit b9edbadefb
1 changed files with 19 additions and 0 deletions
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19
target/i386/kvm/kvm.c
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@ -1703,6 +1703,25 @@ int kvm_arch_init_vcpu(CPUState *cs)
}
break;
case 0x7:
case 0x12:
for (j = 0; ; j++) {
c->function = i;
c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
c->index = j;
cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx);
if (j > 1 && (c->eax & 0xf) != 1) {
break;
}
if (cpuid_i == KVM_MAX_CPUID_ENTRIES) {
fprintf(stderr, "cpuid_data is full, no space for "
"cpuid(eax:0x12,ecx:0x%x)\n", j);
abort();
}
c = &cpuid_data.entries[cpuid_i++];
}
break;
case 0x14: {
uint32_t times;