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

[Jakub Kicinski <jakub.kicinski@xxxxxxxxxxxxx>]

On Tue, 22 Mar 2016 11:34:25 +0000, Jakub Kicinski wrote:
> Hello Jan.
> 
> On Tue, 22 Mar 2016 05:29:54 -0600, Jan Beulich wrote:
> > All,
> > 
> > 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?  We used to do more MSI-X magic...

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