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Re: [Xen-devel] [PATCH] x86/hvm: implement save/restore for posted interrupts

On 02/10/2014 07:51, Jan Beulich wrote:
>>>> On 01.10.14 at 22:13, <olaf@xxxxxxxxx> wrote:
>> One thing I'm not sure about is the firmware of such IvyBridge system.
>> The firmware of the system I can use for testing dumps alot to serial
>> during startup. Not sure if its EFI or not. At least it boots into
>> grub1, so I suspect it has a legacy BIOS. If an EFI system is used,
>> would that change anything? The initial report I got was appearently
>> also with legacy BIOS. Did Intel test with EFI by any chance?
> I don't think firmware should matter here at all. It should merely be
> the exact CPU model that would likely matter.

XenServer can replicate this problem on all APICV capable hardware we
own, and observe the problem being fixed in all cases using v5 of the
patch from this series.

There are some unrelated issues in the heterogeneous pooling case which
cause problems, but any two homogeneous systems, one with APICV enabled
and one with APICV disabled will reliably demonstrate the issue.


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