summary refs log tree commit diff stats
path: root/target/i386/cpu.c
diff options
context:
space:
mode:
Diffstat (limited to 'target/i386/cpu.c')
-rw-r--r--target/i386/cpu.c28
1 files changed, 23 insertions, 5 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 44f1bbdcac..47200b40c1 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -2645,8 +2645,8 @@ static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_7_0_EBX_RTM | CPUID_7_0_EBX_RDSEED | CPUID_7_0_EBX_ADX |
             CPUID_7_0_EBX_SMAP,
         .features[FEAT_7_0_ECX] =
-            CPUID_7_0_ECX_VBMI | CPUID_7_0_ECX_UMIP | CPUID_7_0_ECX_PKU |
-            CPUID_7_0_ECX_VBMI2 | CPUID_7_0_ECX_GFNI |
+            CPUID_7_0_ECX_AVX512_VBMI | CPUID_7_0_ECX_UMIP | CPUID_7_0_ECX_PKU |
+            CPUID_7_0_ECX_AVX512_VBMI2 | CPUID_7_0_ECX_GFNI |
             CPUID_7_0_ECX_VAES | CPUID_7_0_ECX_VPCLMULQDQ |
             CPUID_7_0_ECX_AVX512VNNI | CPUID_7_0_ECX_AVX512BITALG |
             CPUID_7_0_ECX_AVX512_VPOPCNTDQ,
@@ -2703,8 +2703,8 @@ static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD |
             CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT,
         .features[FEAT_7_0_ECX] =
-            CPUID_7_0_ECX_VBMI | CPUID_7_0_ECX_UMIP | CPUID_7_0_ECX_PKU |
-            CPUID_7_0_ECX_VBMI2 | CPUID_7_0_ECX_GFNI |
+            CPUID_7_0_ECX_AVX512_VBMI | CPUID_7_0_ECX_UMIP | CPUID_7_0_ECX_PKU |
+            CPUID_7_0_ECX_AVX512_VBMI2 | CPUID_7_0_ECX_GFNI |
             CPUID_7_0_ECX_VAES | CPUID_7_0_ECX_VPCLMULQDQ |
             CPUID_7_0_ECX_AVX512VNNI | CPUID_7_0_ECX_AVX512BITALG |
             CPUID_7_0_ECX_AVX512_VPOPCNTDQ | CPUID_7_0_ECX_LA57,
@@ -2793,6 +2793,18 @@ static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_6_EAX_ARAT,
         .xlevel = 0x80000008,
         .model_id = "Intel Atom Processor (SnowRidge)",
+        .versions = (X86CPUVersionDefinition[]) {
+            { .version = 1 },
+            {
+                .version = 2,
+                .props = (PropValue[]) {
+                    { "mpx", "off" },
+                    { "model-id", "Intel Atom Processor (Snowridge, no MPX)" },
+                    { /* end of list */ },
+                },
+            },
+            { /* end of list */ },
+        },
     },
     {
         .name = "KnightsMill",
@@ -4693,7 +4705,13 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
             *ecx = xsave_area_size(x86_cpu_xsave_components(cpu));
             *eax = env->features[FEAT_XSAVE_COMP_LO];
             *edx = env->features[FEAT_XSAVE_COMP_HI];
-            *ebx = xsave_area_size(env->xcr0);
+            /*
+             * The initial value of xcr0 and ebx == 0, On host without kvm
+             * commit 412a3c41(e.g., CentOS 6), the ebx's value always == 0
+             * even through guest update xcr0, this will crash some legacy guest
+             * (e.g., CentOS 6), So set ebx == ecx to workaroud it.
+             */
+            *ebx = kvm_enabled() ? *ecx : xsave_area_size(env->xcr0);
         } else if (count == 1) {
             *eax = env->features[FEAT_XSAVE];
         } else if (count < ARRAY_SIZE(x86_ext_save_areas)) {