Re: [Xen-devel] Regression PCI passthrough from 4.5.5 to 4.6.0-rc1

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Wed, Aug 23, 2017 at 07:13:00PM +0200, Andreas Kinzler wrote:
> > > > From a brief look it looks like this would be doable, but the way
> > > these flags are being communicated is rather ugly (the values used
> > > here
> > > > aren't part of the public interface, and hence it wasn't immediately
> > > > clear whether using one of the unused bits would be an option, but
> > > > it looks like it is).
> > > Yes, it's not pretty... Last used bit is 15, hence bit 16 could be
> > > used to signal to Xen whether the interrupt should be unmasked after
> > > binding. I have a half-drafted patch, will finish it now.
> > Andreas, could you please give a try to the attached two patches? One
> > is for Xen and the other one is for QEMU.
> 
> Seems to work after I fixed a bug ;-)
> 
> -gflags |= masked ? 0 : XEN_PT_GFLAGSSHIFT_UNMASKED;
> +gflags |= masked ? 0 : (1 << XEN_PT_GFLAGSSHIFT_UNMASKED);
> 
> Please let Jan and/or others review the patches.

Thanks. I would like to add your tested-by if possible, since I'm not
able to trigger this behavior myself.

Roger.

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