Re: [Xen-devel] [PATCH] Dom0 Kernel - Fixes for saving/restoringMSI/MSI-X across Dom0 S3

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

>>> "Shan, Haitao" <haitao.shan@xxxxxxxxx> 24.11.08 12:03 >>>
>With this patch, MSI/MSI-X capabilities and tables are saved in Dom0 when
>S3 and restored when resume. Actually, this is also the approach that
>kernel takes. The only concern is that Dom0 should not touch MSI/MSI-X,
>they are owned by VMM itself. Maybe adding a hypercall to instruct Xen to
>do the saving/restoring is good. I wonder whether the reason is strong
>enough for adding a hypercall for such purpose.

Is it at all necessary to use a hypercall here? Shouldn't Xen itself be able to
do the necessary saving/restoring (just like it does for IO-APIC)?

Jan


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