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[v3,4/5] target/i386: Enable TOPOEXT feature on AMD EPYC CPU

Message ID 1520281107-5115-5-git-send-email-babu.moger@amd.com (mailing list archive)
State New, archived
Headers show

Commit Message

Babu Moger March 5, 2018, 8:18 p.m. UTC 
Enable TOPOEXT feature on EPYC CPU. This is required to support
hyperthreading on VM guests. Also extend xlevel to 0x8000001E.

Signed-off-by: Babu Moger <babu.moger@amd.com>
---
 target/i386/cpu.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
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Patch

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 555ab83..88941d9 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -1955,7 +1955,8 @@  static X86CPUDefinition builtin_x86_defs[] = {
         .features[FEAT_8000_0001_ECX] =
             CPUID_EXT3_OSVW | CPUID_EXT3_3DNOWPREFETCH |
             CPUID_EXT3_MISALIGNSSE | CPUID_EXT3_SSE4A | CPUID_EXT3_ABM |
-            CPUID_EXT3_CR8LEG | CPUID_EXT3_SVM | CPUID_EXT3_LAHF_LM,
+            CPUID_EXT3_CR8LEG | CPUID_EXT3_SVM | CPUID_EXT3_LAHF_LM |
+            CPUID_EXT3_TOPOEXT,
         .features[FEAT_7_0_EBX] =
             CPUID_7_0_EBX_FSGSBASE | CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_AVX2 |
             CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_RDSEED |
@@ -1970,7 +1971,7 @@  static X86CPUDefinition builtin_x86_defs[] = {
             CPUID_XSAVE_XGETBV1,
         .features[FEAT_6_EAX] =
             CPUID_6_EAX_ARAT,
-        .xlevel = 0x8000000A,
+        .xlevel = 0x8000001E,
         .model_id = "AMD EPYC Processor",
     },
     {