Re: [Xen-devel] abstract model of IOMMU unmaping/mapping failures

["Xu, Quan" <quan.xu@xxxxxxxxx>]

On April 15, 2016 10:03pm, <george.dunlap@xxxxxxxxxx> wrote:
> On 31/03/16 10:06, Xu, Quan wrote:
> > All,
> >
> > Here is a summary of my investigation of the abstract model:
> >
> > Below policies are adopted when deciding whether to rollback a callchain:
> >
> > 1. Domain will be crashed immediately within iommu_{,un}map_page,
> > treated as a fatal error (with the exception of the hardware one).
> > Whether to rollback depends on the need of hardware domain;
> >
> > 2. For hardware domain, roll back on a best effort basis. When
> > rollback is not feasible (in early initialization phase or trade-off
> > of complexity), at least unmap upon maps error and then throw out
> > error message;
> >
> > Below are a detail analysis of all existing callers on IOMMU interfaces 
> > (8-11
> needs more discussions):
> 
> Hey Quan,
> 
> I only reviewed the p2m-related ones (5-10), but I agree with your and Jan's
> conclusions.  Thanks for doing this legwork.
> 
George,
That's good. thanks for your review.
I will send out this patch set soon.

Quan

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel