Re: [Qemu-devel] [PATCH v5 0/3] Introduce IOMMUNotifier struct

[David Gibson]

On Mon, Sep 19, 2016 at 02:47:40PM +0200, Paolo Bonzini wrote:
> 
> 
> On 14/09/2016 10:25, Peter Xu wrote:
> > (Note: we still have pending discussions on how IOMMU notifier
> >  interface should be, assuming that is not a blocker for posting v5 of
> >  this one)
> > 
> > V5:
> > - squash spapr_tce_notify_{started|stopped} into
> >   spapr_tce_notify_flag_changed [David]
> > - in spapr_tce_notify_flag_changed: check flags against "!=
> >   IOMMU_NOTIFIER_NONE", but not "== IOMMU_NOTIFIER_ALL" [David]
> > - add r-b for David on patch 3
> 
> Looks good, thanks.
> 
> If David doesn't reply further I'll merge this.

Sorry, I've been caught up downstream, and didn't have a look at this.

I still have some comments.

> 
> Paolo
> 
> > V4:
> > - change "notifier_caps" into "notifier_flags" [David]
> > - rename IOMMU_NOTIFIER_{CHANGE|INVALIDATION} with MAP/UNMAP [David]
> > - introduce IOMMUOps.notify_flag_changed, to replace notify_started
> >   and notify_stopped [David, Paolo]
> > 
> > V3:
> > - use QLIST instead of embedding Notifier into IOMMUNotifier [Paolo]
> > - fix a build error for ppc64-softmmu
> > 
> > The idea originates from one of Alex's reply:
> > 
> >   https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg00254.html
> > 
> > But after further discussions, it seems that only adding a simple type
> > for notifier is not enough. This series introduced IOMMUNotifier
> > struct to replace the old Notifier interface. Along with it, we can
> > provide registration for one (or multiple) of the IOMMU notifications:
> > 
> > - cache invalidations
> > - entry changes
> > 
> > This is a support material for Jason's vhost dmar patchset.
> > 
> > Please read commit messages for detailed information. Thanks,
> > 
> > Peter Xu (3):
> >   memory: introduce IOMMUNotifier and its caps
> >   memory: introduce IOMMUOps.notify_flag_changed
> >   intel_iommu: allow UNMAP notifiers
> > 
> >  hw/i386/intel_iommu.c         | 18 ++++++++-----
> >  hw/ppc/spapr_iommu.c          | 18 +++++++------
> >  hw/vfio/common.c              |  3 ++-
> >  include/exec/memory.h         | 47 +++++++++++++++++++++++++--------
> >  include/hw/vfio/vfio-common.h |  2 +-
> >  memory.c                      | 60 
> > +++++++++++++++++++++++++++++++++----------
> >  6 files changed, 107 insertions(+), 41 deletions(-)
> > 
> 

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson

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