[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PULL v2 17/33] hw/i386/fw_cfg: Set SGX bits in feature control fw_cfg a
From: |
Paolo Bonzini |
Subject: |
[PULL v2 17/33] hw/i386/fw_cfg: Set SGX bits in feature control fw_cfg accordingly |
Date: |
Thu, 30 Sep 2021 16:57:22 +0200 |
From: Sean Christopherson <sean.j.christopherson@intel.com>
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>
---
hw/i386/fw_cfg.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/hw/i386/fw_cfg.c b/hw/i386/fw_cfg.c
index 4e68d5dea4..a283785a8d 100644
--- a/hw/i386/fw_cfg.c
+++ b/hw/i386/fw_cfg.c
@@ -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;
}
--
2.31.1