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[Qemu-devel] [PATCH v4 4/5] target/i386: Enable TOPOEXT feature on AMD E
From: |
Babu Moger |
Subject: |
[Qemu-devel] [PATCH v4 4/5] target/i386: Enable TOPOEXT feature on AMD EPYC CPU |
Date: |
Mon, 12 Mar 2018 17:00:48 -0400 |
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>
---
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 ba63d0c..ade272e 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 |
@@ -1999,7 +2000,8 @@ 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] =
@@ -4113,6 +4115,11 @@ static void x86_cpu_expand_features(X86CPU *cpu, Error
**errp)
if (env->features[FEAT_8000_0001_ECX] & CPUID_EXT3_SVM) {
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);
+ }
}
/* Set cpuid_*level* based on cpuid_min_*level, if not explicitly set */
--
1.8.3.1
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, (continued)
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Eduardo Habkost, 2018/03/20
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Moger, Babu, 2018/03/20
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Moger, Babu, 2018/03/21
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Eduardo Habkost, 2018/03/21
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Kash Pande, 2018/03/21
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Moger, Babu, 2018/03/21
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Eduardo Habkost, 2018/03/21
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Moger, Babu, 2018/03/21
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Eduardo Habkost, 2018/03/21
- Re: [Qemu-devel] [PATCH v4 2/5] target/i386: Populate AMD Processor Cache Information, Moger, Babu, 2018/03/27
[Qemu-devel] [PATCH v4 4/5] target/i386: Enable TOPOEXT feature on AMD EPYC CPU,
Babu Moger <=
[Qemu-devel] [PATCH v4 3/5] target/i386: Add support for CPUID_8000_001E for AMD, Babu Moger, 2018/03/12
[Qemu-devel] [PATCH v4 5/5] target/i386: Remove generic SMT thread check, Babu Moger, 2018/03/12
Re: [Qemu-devel] [PATCH v4 0/5] Enable TOPOEXT to support hyperthreading on AMD CPU, Kash Pande, 2018/03/13