[PATCH 5/5] cpu: Introduce getHost supoort for ARM

Daniel P. Berrangé berrange at redhat.com
Mon Mar 30 12:00:58 UTC 2020


On Mon, Mar 30, 2020 at 07:32:36PM +0800, Zhenyu Zheng wrote:
> Hi Daniel,
> 
> Thanks for thre review and reply, my first implementation was going to
> gather data from /proc/cpuinfo, but unlike X86, we can only get this kind
> of info:
> 
>   processor       : 0
>   BogoMIPS        : 200.00
>   Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
>   CPU implementer : 0x43
>   CPU architecture: 8
>   CPU variant     : 0x1
>   CPU part        : 0x0a1
>   CPU revision    : 1
> 
> so we have to perform some translation to perform human readable
> information, and I mentioned that 'lscpu' has done that too. So Andrea
> Bolognani
> suggested that maybe we can use it directly, to avoid re-implement the
> translation. Here is the discussion:
> https://www.redhat.com/archives/libvir-list/2020-March/msg00812.html

On x86 we get majority of info straight from calling the CPUID instruction,
not /proc/cpuinfo, and use our XML data files in src/cpu_map to translate
things into human readable names.  I see you're adding XML data files
with names in the earlier patches. Is it possible to add the hex values
for the CPU implementer/architecture/variant/part to these XML files so
we can directly map them in libvirt, in the same way we do for x86


Regards,
Daniel
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