Re: [PATCH] Detect L2 cache size for x86

["Zuxy Meng" <zuxy dot meng at gmail dot com>]

"Uros Bizjak" <ubizjak@gmail.com> ååæææé:5787cf470803202312k156d4dbbnff0f13b1ff36ff43@mail.gmail.com...
> Hello!
>
> >>    The attached patch detects automatically the L2 cache size of a host 
> >> x86
> >>    CPU, following what has already been done for L1 cache. Two schemes 
> >> are
> >>    utilized in the detection: AMD CPUs will use CPUID function
> 0x80000006, and
> >>    Intel CPUs will try both CPUID function 0x2 and 0x80000006.
> CPUID function
> >>    0x2 is a bit complex to decode and IMHO Intel is unlikely to abandon
> >>    function 0x80000006 for its future products. By trying both for
> Intel we can
> >>    avoid adding more L2 cache descriptors to the decoding function.
>
> > Ping...
>
> -ENOCHANGELOG, -ENOTESTINFO.


       *config/i386/driver-i386.c: Add runtime L2 cache size detection

Patch is bootstrapped and tested on i386-pc-mingw32.

--
Zuxy

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