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hw/i386/fw_cfg: Set SGX bits in feature control fw_cfg accordingly 

Request SGX an SGX Launch Control to be enabled in FEATURE_CONTROL
when the features are exposed to the guest. Our design is the SGX
Launch Control bit will be unconditionally set in FEATURE_CONTROL,
which is unlike host bios.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-17-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-07-19 19:21:19 +08:00 committed by Paolo Bonzini
parent dca6cffc55
commit e2560114cd
1 changed files with 11 additions and 1 deletions
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12
hw/i386/fw_cfg.c
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@ -159,7 +159,7 @@ void fw_cfg_build_feature_control(MachineState *ms, FWCfgState *fw_cfg)
{
X86CPU *cpu = X86_CPU(ms->possible_cpus->cpus[0].cpu);
CPUX86State *env = &cpu->env;
uint32_t unused, ecx, edx;
uint32_t unused, ebx, ecx, edx;
uint64_t feature_control_bits = 0;
uint64_t *val;
@ -174,6 +174,16 @@ void fw_cfg_build_feature_control(MachineState *ms, FWCfgState *fw_cfg)
feature_control_bits |= FEATURE_CONTROL_LMCE;
}
if (env->cpuid_level >= 7) {
cpu_x86_cpuid(env, 0x7, 0, &unused, &ebx, &ecx, &unused);
if (ebx & CPUID_7_0_EBX_SGX) {
feature_control_bits |= FEATURE_CONTROL_SGX;
}
if (ecx & CPUID_7_0_ECX_SGX_LC) {
feature_control_bits |= FEATURE_CONTROL_SGX_LC;
}
}
if (!feature_control_bits) {
return;
}