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i386: Enable TOPOEXT feature on AMD EPYC CPU

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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.

Backports commit e00516475c270dcb6705753da96063f95699abf2 from qemu
This commit is contained in:
Babu Moger 2018-07-03 00:32:45 -04:00 committed by Lioncash
parent b5f47a4884
commit ec6b1f1554
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 6 additions and 4 deletions
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10
qemu/target/i386/cpu.c
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@ -3183,7 +3183,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
},
{
"EPYC",
0xd, 0x8000000A,
0xd, 0x8000001E,
CPUID_VENDOR_AMD,
23, 1, 2,
{
@ -3215,7 +3215,8 @@ static X86CPUDefinition builtin_x86_defs[] = {
// 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,
// FEAT_8000_0007_EDX
0,
// FEAT_8000_0008_EBX
@ -3250,7 +3251,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
},
{
"EPYC-IBPB",
0xd, 0x8000000A,
0xd, 0x8000001E,
CPUID_VENDOR_AMD,
23, 1, 2,
{
@ -3282,7 +3283,8 @@ static X86CPUDefinition builtin_x86_defs[] = {
// 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,
// FEAT_8000_0007_EDX
0,
// FEAT_8000_0008_EBX