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target-i386: Remove ABM from qemu64 CPU model

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ABM is not available on Sandy Bridge and older, and we want to make the
default CPU runnable in most hosts, so it won't be enabled by default in
KVM mode.

We should eventually have all features supported by TCG enabled by
default in TCG mode, but as we don't have a good mechanism today to
ensure we have different defaults in KVM and TCG mode, disable ABM in
the qemu64 CPU model entirely.

Backports commit 711956722c6764336f8b78a2106e57c55f02f36d from qemu
This commit is contained in:
Eduardo Habkost 2018-02-17 15:32:39 -05:00 committed by Lioncash
parent d108029fb3
commit 716da652e7
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1 changed files with 1 additions and 2 deletions
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qemu/target-i386/cpu.c
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@ -683,8 +683,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
// FEAT_8000_0001_EDX
CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
// FEAT_8000_0001_ECX
CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM |
CPUID_EXT3_ABM,
CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM,
},
},
{