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target-i386: TCG can support CPUID.07H:EBX.erms

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ERMS just says "rep movsb" and "rep stosb" are fast. It does not
imply any new instruction, so we can support it easily.

Backports commit 7eb24386dbfb0b66464c7f856c1074c606efccda from qemu
This commit is contained in:
Paolo Bonzini 2018-02-25 02:28:52 -05:00 committed by Lioncash
parent 78f9128dbb
commit 1be92ac243
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GPG Key ID: 4E3C3CC1031BA9C7
1 changed files with 3 additions and 2 deletions
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qemu/target-i386/cpu.c
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@ -328,10 +328,11 @@ static const char *cpuid_6_feature_name[] = {
#define TCG_7_0_EBX_FEATURES (CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_SMAP | \
CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | \
CPUID_7_0_EBX_PCOMMIT | CPUID_7_0_EBX_CLFLUSHOPT | \
CPUID_7_0_EBX_CLWB | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_FSGSBASE)
CPUID_7_0_EBX_CLWB | CPUID_7_0_EBX_MPX | CPUID_7_0_EBX_FSGSBASE | \
CPUID_7_0_EBX_ERMS)
/* missing:
CPUID_7_0_EBX_HLE, CPUID_7_0_EBX_AVX2,
CPUID_7_0_EBX_ERMS, CPUID_7_0_EBX_INVPCID, CPUID_7_0_EBX_RTM,
CPUID_7_0_EBX_INVPCID, CPUID_7_0_EBX_RTM,
CPUID_7_0_EBX_RDSEED */
#define TCG_7_0_ECX_FEATURES (CPUID_7_0_ECX_PKU | CPUID_7_0_ECX_OSPKE)
#define TCG_APM_FEATURES 0