Re: [Qemu-devel] [PATCH v7 0/3] Introduce IOMMUNotifier struct

[David Gibson]

On Fri, Sep 23, 2016 at 01:02:25PM +0800, Peter Xu wrote:
> V7:
> - add comments to memory_region_notify_iommu() to better clarify the
>   interface [David]
> - vfio_iommu_map_notify(): remove pointless "IOMMUTLBEntry *iotlb =
>   data" [David]
> - typo fix on English [David]
> 
> V6:
> - use IOMMUTLBEntry directly for IOMMUNotifier.notify() [David]
> - add explicit comment for patch 1 that CHANGE should be treated as a
>   MAP then an UNMAP [David]
> - add a-b for David on patch 2
> 
> 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
> 
> 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,

I think we're ready to go with this.  I still think 3/3 is premature,
but I don't care that much.

Peter, thanks for your patience with my nitpicking of the interface.

-- 
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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