Re: [Xen-devel] [PATCH] x86/apic: remove DMI checks in bigsmp driver for obsolete systems

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 28.08.13 at 22:58, Matt Wilson <msw@xxxxxxxxxx> wrote:
> On Wed, Aug 28, 2013 at 08:25:08PM +0100, Andrew Cooper wrote:
>> On 28/08/13 19:59, Matt Wilson wrote:
>> > The DMI checks that force the use of the bigsmp APIC driver are for
>> > systems that are no longer supported by Xen (32-bit x86).
>> >
>> > Signed-off-by: Matt Wilson <msw@xxxxxxxxxx>
>> > Cc: Keir Fraser <keir@xxxxxxx>
>> > Cc: Jan Beulich <jbeulich@xxxxxxxx>
>> > Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
>> 
>> I did some googling.
>> 
>> While the two HP machines do indeed only support 32bit cpus (Intel
>> 'Gallatin' series),
>> 
>> http://www.serverwatch.com/hreviews/article.php/3655386 
>> 
>> indicates that the ES7000/ONE can be configured with 64bit Xeon CPUs,
>> and is therefore still supported by Xen.
> 
> Indeed. I'm hoping that such systems would be setting the clustered
> APIC flag in FADT, which would have the same effect. I've added some
> @unisys.com email addresses from past discussions.

I wouldn't want to rely on that flag. Let's just keep that one
DMI entry.

Jan


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