Re: [Xen-devel] [PATCH v8 06/24] x86: refactor psr: implement get hw info flow.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 10.03.17 at 02:43, <yi.y.sun@xxxxxxxxxxxxxxx> wrote:
> On 17-03-08 08:15:33, Jan Beulich wrote:
>> >>> On 15.02.17 at 09:49, <yi.y.sun@xxxxxxxxxxxxxxx> wrote:
>> > --- a/xen/arch/x86/psr.c
>> > +++ b/xen/arch/x86/psr.c
>> > @@ -84,6 +84,7 @@ enum psr_feat_type {
>> >      PSR_SOCKET_L3_CAT = 0,
>> >      PSR_SOCKET_L3_CDP,
>> >      PSR_SOCKET_L2_CAT,
>> > +    PSR_SOCKET_UNKNOWN = 0xFFFF,
>> 
>> Any reason to use this value, instead of just the next sequential one?
>> 
> This is an error value used below, in 'psr_cbm_type_to_feat_type'. To make it
> explicitly different, I assign a big value to it.

How does that "big value" help?

Jan


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