Re: [Xen-devel] Linux 4.5's nfp_net_irq_unmask_msix() vs Xen

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 22.03.16 at 12:38, <jakub.kicinski@xxxxxxxxxxxxx> wrote:
> On Tue, 22 Mar 2016 11:34:25 +0000, Jakub Kicinski wrote:
>> On Tue, 22 Mar 2016 05:29:54 -0600, Jan Beulich wrote:
>> > the new driver homed under drivers/net/ethernet/netronome/nfp/
>> > has some direct MSI-X table manipulation which quite clearly is
>> > incompatible with Xen. According to the comment preceding the
>> > function, bypassing the Linux IRQ subsystem is intentional here.
>> > Irrespective of the question of whether that's a good idea, this
>> > also bypassing the abstractions allowing MSI to work on Xen
>> > clearly needs addressing. Does anyone have any thoughts on how
>> > to reasonably achieve this? Calling pci_msi_unmask_irq() would
>> > seem to be an option (the symbol at least is exported), but likely
>> > isn't intended to be used that way.
>> 
>> Did you check the driver code before sending this?  I think you may
>> be referring to something which was removed months ago (and never
>> upstreamed).
> 
> Oh, sorry.  I think you just mean unmasking automasked interrupts.  Is
> that correct?

Yes (see $subject).

Jan


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