diff mbox series

[07/32] i386: Add SGX CPUID leaf FEAT_SGX_12_0_EAX

Message ID 20210419100156.53504-8-yang.zhong@intel.com
State New
Headers show
Series Qemu SGX virtualization | expand

Commit Message

Yang Zhong April 19, 2021, 10:01 a.m. UTC 
From: Sean Christopherson <sean.j.christopherson@intel.com>

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>
---
 target/i386/cpu.c | 20 ++++++++++++++++++++
 target/i386/cpu.h |  1 +
 2 files changed, 21 insertions(+)
diff mbox series

Patch

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 544d7be43c..5443f69fa5 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -676,6 +676,7 @@  static 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
 
 typedef enum FeatureWordType {
    CPUID_FEATURE_WORD,
@@ -1325,6 +1326,25 @@  static 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 {
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index f074a315d1..3e6a9b8e6c 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -549,6 +549,7 @@  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;