[Qemu-devel] Re: [PATCH] Add definitions for current cpu models..

[Arnd Bergmann <arnd@arndb.de>]

On Monday 18 January 2010, john cooper wrote:
> +        .name = "Conroe",
> +        .level = 2,
> +        .vendor1 = CPUID_VENDOR_INTEL_1,
> +        .vendor2 = CPUID_VENDOR_INTEL_2,
> +        .vendor3 = CPUID_VENDOR_INTEL_3,
> +        .family = 6,   /* P6 */
> +        .model = 2,

                ^^^^^^^^ that looks wrong -- what is model 2 actually?

> +        .stepping = 3,
> +        .features = PPRO_FEATURES | 
> +            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |    /* note 1 */
> +            CPUID_PSE36,                                /* note 2 */
> +        .ext_features = CPUID_EXT_SSE3 | CPUID_EXT_SSSE3,
> +        .ext2_features = (PPRO_FEATURES & CPUID_EXT2_MASK) | 
> +            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
> +        .ext3_features = CPUID_EXT3_LAHF_LM,
> +        .xlevel = 0x8000000A,
> +        .model_id = "Intel Celeron_4x0 (Conroe/Merom Class Core 2)",
> +    },

Celeron_4x0 is a rather bad example, because it is based on the 
single-core Conroe-L, which is family 6 / model 22 unlike all the dual-
and quad-core Merom/Conroe that are model 15.

> +    {
> +        .name = "Penryn",
> +        .level = 2,
> +        .vendor1 = CPUID_VENDOR_INTEL_1,
> +        .vendor2 = CPUID_VENDOR_INTEL_2,
> +        .vendor3 = CPUID_VENDOR_INTEL_3,
> +        .family = 6,   /* P6 */
> +        .model = 2,
> +        .stepping = 3,
> +        .features = PPRO_FEATURES | 
> +            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |    /* note 1 */
> +            CPUID_PSE36,                                /* note 2 */
> +        .ext_features = CPUID_EXT_SSE3 |
> +            CPUID_EXT_CX16 | CPUID_EXT_SSSE3 | CPUID_EXT_SSE41,
> +        .ext2_features = (PPRO_FEATURES & CPUID_EXT2_MASK) | 
> +            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
> +        .ext3_features = CPUID_EXT3_LAHF_LM,
> +        .xlevel = 0x8000000A,
> +        .model_id = "Intel Core 2 Duo P9xxx (Penryn Class Core 2)",
> +    },

This would be model 23 for Penryn-class Xeon/Core/Pentium/Celeron processors
without L3 cache.

> +    {
> +        .name = "Nehalem",
> +        .level = 2,
> +        .vendor1 = CPUID_VENDOR_INTEL_1,
> +        .vendor2 = CPUID_VENDOR_INTEL_2,
> +        .vendor3 = CPUID_VENDOR_INTEL_3,
> +        .family = 6,   /* P6 */
> +        .model = 2,
> +        .stepping = 3,
> +        .features = PPRO_FEATURES | 
> +            CPUID_MTRR | CPUID_CLFLUSH | CPUID_MCA |    /* note 1 */
> +            CPUID_PSE36,                                /* note 2 */
> +        .ext_features = CPUID_EXT_SSE3 |
> +            CPUID_EXT_CX16 | CPUID_EXT_SSSE3 | CPUID_EXT_SSE41 |
> +            CPUID_EXT_SSE42 | CPUID_EXT_POPCNT,
> +        .ext2_features = (PPRO_FEATURES & CPUID_EXT2_MASK) | 
> +            CPUID_EXT2_LM | CPUID_EXT2_SYSCALL | CPUID_EXT2_NX,
> +        .ext3_features = CPUID_EXT3_LAHF_LM,
> +        .xlevel = 0x8000000A,
> +        .model_id = "Intel Core i7 9xx (Nehalem Class Core i7)",
> +    },

Apparently, not all the i7-9xx CPUs are Nehalem, the i7-980X is supposed
to be Westmere, which has more features.

Because of the complexity, I'd recommend passing down the *model* number
of the emulated CPU, the interesting Intel ones (those supported by KVM) being:

15-6: CedarMill/Presler/Dempsey/Tulsa (Pentium 4/Pentium D/Xeon 50xx/Xeon 71xx)
6-14: Yonah/Sossaman (Celeron M4xx, Core Solo/Duo, Pentium Dual-Core T1000, Xeon ULV)
6-15: Merom/Conroe/Kentsfield/Woodcrest/Clovertown/Tigerton
      (Celeron M5xx/E1xxx/T1xxx, Pentium T2xxx/T3xxx/E2xxx,Core 2 Solo U2xxx,
       Core 2 Duo E4xxx/E6xxx/Q6xxx/T5xxx/T7xxx/L7xxx/U7xxx/SP7xxx,
       Xeon 30xx/32xx/51xx/52xx/72xx/73xx)
6-22: Penryn/Wolfdale/Yorkfield/Harpertown (Celeron 7xx/9xx/SU2xxx/T3xxx/E3xxx,
       Pentium T4xxx/SU2xxx/SU4xxx/E5xxx/E6xxx, Core 2 Solo SU3xxx,
       Core 2 Duo Pxxxx/SUxxxx/T6xxx/x8xxx/x9xxx,
       Xeon 31xx/33xx/52xx/54xx)
6-26: Gainestown/Bloomfield (Xeon 35xx/55xx, Core i7-9xx)
6-28: Atom
6-29: Dunnington (Xeon 74xx)
6-30: Lynnfield/Clarksfield/JasperForest (Xeon 34xx, Core i7-8xx, Core i7-xxxQM,
       Core i5-7xx)
6-37: Arrandale/Clarkdale (Dual-Core Core i3/i5/i7)
6-44: Gulftown (six-core)

	Arnd