Re: [Xen-devel] [PATCH v3 17/24] xen/passthrough: arm: release earlier the DT devices assigned to a guest

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Mon, 2015-02-23 at 09:37 +0000, Jan Beulich wrote:
> >>> On 20.02.15 at 18:46, <julien.grall@xxxxxxxxxx> wrote:
> > On 20/02/15 17:03, Ian Campbell wrote:
> >> On Tue, 2015-01-13 at 14:25 +0000, Julien Grall wrote:
> >> 
> >> Subject: "release the DT devices assigned to a guest earlier"
> >> 
> >>> The toolstack may not have deassign every device used by a guest.
> >> 
> >> "deassigned"
> >> 
> >>> Therefore we have to go through the device list and removing them before
> >> 
> >> "and remove them"
> >> 
> >>> asking the IOMMU drivers to release memory for this domain.
> >>>
> >>> This can be done by moving the call to the release function when we
> >>> relinquish the resources. The IOMMU part will be destroyed later when
> >>> the domain is freed.
> >>>
> >>> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
> >>> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> >> 
> >> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> >> 
> >> I'd like to hear Jan's opinion though.
> > 
> > FWIW, this is how it's done for PCI.
> 
> Right, IOW I agree to the idea of the patch.

Thanks. If Julien could record this in the form of an ack that would
save me remembering you've said so (otherwise it could just go as a
comment after the --- I suppose).

Ian.


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