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[Qemu-devel] [PATCH v8 7/8] i386: Enable TOPOEXT feature on AMD EPYC CPU
From: |
Babu Moger |
Subject: |
[Qemu-devel] [PATCH v8 7/8] i386: Enable TOPOEXT feature on AMD EPYC CPU |
Date: |
Thu, 10 May 2018 15:41:47 -0500 |
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 <address@hidden>
Tested-by: Geoffrey McRae <address@hidden>
Reviewed-by: Eduardo Habkost <address@hidden>
---
target/i386/cpu.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 5cfc7bb0e1..575f2416a1 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -2382,7 +2382,8 @@ 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 |
@@ -2427,7 +2428,8 @@ 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_8000_0008_EBX] =
CPUID_8000_0008_EBX_IBPB,
.features[FEAT_7_0_EBX] =
@@ -4540,6 +4542,11 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error
**errp)
x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000000A);
}
+ /* TOPOEXT feature requires 0x8000001E */
+ if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_TOPOEXT) {
+ x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001E);
+ }
+
/* SEV requires CPUID[0x8000001F] */
if (sev_enabled()) {
x86_cpu_adjust_level(cpu, &env->cpuid_min_xlevel, 0x8000001F);
--
2.17.0
- [Qemu-devel] [PATCH v8 0/8] i386: Enable TOPOEXT to support hyperthreading on AMD CPU, Babu Moger, 2018/05/10
- [Qemu-devel] [PATCH v8 2/8] i386: Add cache information in X86CPUDefinition, Babu Moger, 2018/05/10
- [Qemu-devel] [PATCH v8 4/8] i386: Initialize cache information for EPYC family processors, Babu Moger, 2018/05/10
- [Qemu-devel] [PATCH v8 7/8] i386: Enable TOPOEXT feature on AMD EPYC CPU,
Babu Moger <=
- [Qemu-devel] [PATCH v8 5/8] i386: Populate AMD Processor Cache Information for cpuid 0x8000001D, Babu Moger, 2018/05/10
- [Qemu-devel] [PATCH v8 6/8] i386: Add support for CPUID_8000_001E for AMD, Babu Moger, 2018/05/10
- [Qemu-devel] [PATCH v8 1/8] i386: Helpers to encode cache information consistently, Babu Moger, 2018/05/10
- [Qemu-devel] [PATCH v8 3/8] i386: Add new property to control cache info, Babu Moger, 2018/05/10