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i386: Add SGX CPUID leaf FEAT_SGX_12_0_EAX 

CPUID leaf 12_0_EAX is an Intel-defined feature bits leaf enumerating
the CPU's SGX capabilities, e.g. supported SGX instruction sets.
Currently there are four enumerated capabilities:

    - SGX1 instruction set, i.e. "base" SGX
    - SGX2 instruction set for dynamic EPC management
    - ENCLV instruction set for VMM oversubscription of EPC
    - ENCLS-C instruction set for thread safe variants of ENCLS

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20210719112136.57018-8-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-07-19 19:21:10 +08:00 committed by Paolo Bonzini
parent 5c76b651d0
commit 4b841a793c
2 changed files with 21 additions and 0 deletions
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20
target/i386/cpu.c
View File

@ -654,6 +654,7 @@ void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1,
/* missing:
CPUID_XSAVE_XSAVEC, CPUID_XSAVE_XSAVES */
#define TCG_14_0_ECX_FEATURES 0
#define TCG_SGX_12_0_EAX_FEATURES 0
FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
[FEAT_1_EDX] = {
@ -1182,6 +1183,25 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.tcg_features = TCG_14_0_ECX_FEATURES,
},
[FEAT_SGX_12_0_EAX] = {
.type = CPUID_FEATURE_WORD,
.feat_names = {
"sgx1", "sgx2", NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
},
.cpuid = {
.eax = 0x12,
.needs_ecx = true, .ecx = 0,
.reg = R_EAX,
},
.tcg_features = TCG_SGX_12_0_EAX_FEATURES,
},
};
typedef struct FeatureMask {

1
target/i386/cpu.h
View File

@ -578,6 +578,7 @@ typedef enum FeatureWord {
FEAT_VMX_BASIC,
FEAT_VMX_VMFUNC,
FEAT_14_0_ECX,
FEAT_SGX_12_0_EAX, /* CPUID[EAX=0x12,ECX=0].EAX (SGX) */
FEATURE_WORDS,
} FeatureWord;