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i386: Enable TOPOEXT feature on AMD EPYC CPU 

Enable TOPOEXT feature on EPYC CPU. This is required to support
hyperthreading on VM guests. Also extend xlevel to 0x8000001E.

Disable topoext on PC_COMPAT_2_12 and keep xlevel 0x8000000a.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <1529443919-67509-3-git-send-email-babu.moger@amd.com>
[ehabkost: Added EPYC-IBPB.xlevel to PC_COMPAT_2_12]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Babu Moger 2018-06-19 17:31:58 -04:00 committed by Eduardo Habkost
parent 631be32155
commit e00516475c
2 changed files with 18 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
include/hw/i386/pc.h
View File

@ -303,6 +303,18 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
.driver = TYPE_X86_CPU,\
.property = "legacy-cache",\
.value = "on",\
},{\
.driver = TYPE_X86_CPU,\
.property = "topoext",\
.value = "off",\
},{\
.driver = "EPYC-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},{\
.driver = "EPYC-IBPB" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},
#define PC_COMPAT_2_11 \

10
target/i386/cpu.c
View File

@ -2579,7 +2579,8 @@ 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 |
@ -2594,7 +2595,7 @@ 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",
.cache_info = &epyc_cache_info,
},
@ -2624,7 +2625,8 @@ 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] =
@ -2641,7 +2643,7 @@ 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 (with IBPB)",
.cache_info = &epyc_cache_info,
},