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i386: Change stepping of Haswell to non-blacklisted value 

glibc blacklists TSX on Haswell CPUs with model==60 and
stepping < 4. To make the Haswell CPU model more useful, make
those guests actually use TSX by changing CPU stepping to 4.

References:
* glibc commit 2702856bf45c82cf8e69f2064f5aa15c0ceb6359
  https://sourceware.org/git/?p=glibc.git;a=commit;h=2702856bf45c82cf8e69f2064f5aa15c0ceb6359

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20170309181212.18864-4-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Eduardo Habkost 2017-03-09 15:12:12 -03:00
parent 40e80ee411
commit ec56a4a7b0
2 changed files with 6 additions and 1 deletions
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5
include/hw/i386/pc.h
View File

@ -389,6 +389,11 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
.driver = TYPE_X86_CPU,\
.property = "vmware-cpuid-freq",\
.value = "off",\
},\
{\
.driver = "Haswell-" TYPE_X86_CPU,\
.property = "stepping",\
.value = "1",\
},
#define PC_COMPAT_2_7 \

2
target/i386/cpu.c
View File

@ -1196,7 +1196,7 @@ static X86CPUDefinition builtin_x86_defs[] = {
.vendor = CPUID_VENDOR_INTEL,
.family = 6,
.model = 60,
.stepping = 1,
.stepping = 4,
.features[FEAT_1_EDX] =
CPUID_VME | CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |