Re: [Xen-devel] [PATCH v6 07/14] x86: add iommu_op to query reserved ranges

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Jan Beulich
> Sent: Friday, September 7, 2018 7:01 PM
> 
> >>> On 23.08.18 at 11:47, <paul.durrant@xxxxxxxxxx> wrote:
> > This patch adds an iommu_op to allow the domain IOMMU reserved
> ranges to be
> > queried by the guest.
> >
> > NOTE: The number of reserved ranges is determined by system firmware,
> in
> >       conjunction with Xen command line options, and is expected to be
> >       small. Thus, to avoid over-complicating the code, there is no
> >       pre-emption check within the operation.
> 
> Hmm, RMRRs reportedly can cover a fair part of (the entire?) frame
> buffer of a graphics device.
> 

but it is still just one range
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