Re: [Xen-devel] [PATCH RFC 4/8] libxl: cpuid: add guest topology support

[Joao Martins <joao.m.martins@xxxxxxxxxx>]

On 02/25/2016 04:29 PM, Wei Liu wrote:
> On Mon, Feb 22, 2016 at 09:02:10PM +0000, Joao Martins wrote:
>> Introduce internal cpuid routine for setting the topology
>> as seen by the guest. The topology is made based on
>> leaf 1 and leaf 4 for Intel, more specifically setting:
>>
>> Number of logical processors:
>>      proccount  (CPUID.1:EBX[16:24])
>>
>> Number of physical cores - 1:
>>      procpkg    (CPUID.(4,0):EBX[26:32])
>>
>> cache core count - 1:
>>      proccountX (CPUID.(4,Y):EBX[14:26])
>>
>>      given that X is l1d, l1i, l2 or l3
>>      and Y the correspondent subleave [0-3]
>>
>> Signed-off-by: Joao Martins <joao.m.martins@xxxxxxxxxx>
>> ---
>> CC: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
>> CC: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
>> CC: Ian Campbell <ian.campbell@xxxxxxxxxx>
>> CC: Wei Liu <wei.liu2@xxxxxxxxxx>
>> ---
>>  tools/libxl/libxl_cpuid.c    | 38 ++++++++++++++++++++++++++++++++++++++
>>  tools/libxl/libxl_internal.h |  2 ++
>>  2 files changed, 40 insertions(+)
>>
>> diff --git a/tools/libxl/libxl_cpuid.c b/tools/libxl/libxl_cpuid.c
>> index deb81d2..e220566 100644
>> --- a/tools/libxl/libxl_cpuid.c
>> +++ b/tools/libxl/libxl_cpuid.c
>> @@ -352,6 +352,44 @@ void libxl_cpuid_set(libxl_ctx *ctx, uint32_t domid,
>>                       (const char**)(cpuid[i].policy), cpuid_res);
>>  }
>>  
>> +static int libxl_cpuid_parse_list(libxl_cpuid_policy_list *topo,
>> +                                  char **keys, int *vals, size_t sz)
> 
> Just call it cpuid_parse_list is fine.
> 
OK.

> Wei.
> 

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