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target-i386: emulate CPUID level of real hardware

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W10 insider has a bug where it ignores CPUID level and interprets
CPUID.(EAX=07H, ECX=0H) incorrectly, because CPUID in fact returned
CPUID.(EAX=04H, ECX=0H);  this resulted in execution of unsupported
instructions.

While it's a Windows bug, there is no reason to emulate incorrect level.

I used http://instlatx64.atw.hu/ as a source of CPUID and checked that
it matches Penryn Xeon X5472, Westmere Xeon W3520, SandyBridge i5-2540M,
and Haswell i5-4670T.

kvm64 and qemu64 were bumped to 0xD to allow all available features for
them (and to avoid the same Windows bug).

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Radim Krčmář 2015-07-09 21:07:39 +02:00 • committed by Eduardo Habkost
parent d461a44ca4
commit 3046bb5deb
2 changed files with 86 additions and 19 deletions
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68
include/hw/i386/pc.h
View file

@ -298,6 +298,74 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
.driver = TYPE_X86_CPU,\
.property = "arat",\
.value = "off",\
},{\
.driver = "qemu64" "-" TYPE_X86_CPU,\
.property = "level",\
.value = stringify(4),\
},{\
.driver = "kvm64" "-" TYPE_X86_CPU,\
.property = "level",\
.value = stringify(5),\
},{\
.driver = "pentium3" "-" TYPE_X86_CPU,\
.property = "level",\
.value = stringify(2),\
},{\
.driver = "n270" "-" TYPE_X86_CPU,\
.property = "level",\
.value = stringify(5),\
},{\
.driver = "Conroe" "-" TYPE_X86_CPU,\
.property = "level",\
.value = stringify(4),\
},{\
.driver = "Penryn" "-" TYPE_X86_CPU,\
.property = "level",\
.value = stringify(4),\
},{\
.driver = "Nehalem" "-" TYPE_X86_CPU,\
.property = "level",\
.value = stringify(4),\
},{\
.driver = "n270" "-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},{\
.driver = "Penryn" "-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},{\
.driver = "Conroe" "-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},{\
.driver = "Nehalem" "-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},{\
.driver = "Westmere" "-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},{\
.driver = "SandyBridge" "-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},{\
.driver = "Haswell" "-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},{\
.driver = "Haswell-noTSX" "-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},{\
.driver = "Broadwell" "-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},{\
.driver = "Broadwell-noTSX" "-" TYPE_X86_CPU,\
.property = "xlevel",\
.value = stringify(0x8000000a),\
},
#define PC_COMPAT_2_2 \