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Re: [Xen-devel] [PATCH v5 2/9] x86/iommu: add IOMMU entries for p2m_mmio_direct pages

To: Roger Pau Monne <roger.pau@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Date: Fri, 20 Jan 2017 18:44:15 +0000
Cc: Kevin Tian <kevin.tian@xxxxxxxxx>, Jun Nakajima <jun.nakajima@xxxxxxxxx>, konrad.wilk@xxxxxxxxxx, George Dunlap <george.dunlap@xxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, boris.ostrovsky@xxxxxxxxxx
Delivery-date: Fri, 20 Jan 2017 18:44:34 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On 19/01/17 17:29, Roger Pau Monne wrote:
> There's nothing wrong with allowing the domain to perform DMA transfers to
> MMIO areas that it already can access from the CPU, and this allows us to
> remove the hack in set_identity_p2m_entry for PVH Dom0.
>
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Subject to Kevin's fix, Reviewed-by: Andrew Cooper
<andrew.cooper3@xxxxxxxxxx>

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Follow-Ups:
- Re: [Xen-devel] [PATCH v5 2/9] x86/iommu: add IOMMU entries for p2m_mmio_direct pages
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References:
- [Xen-devel] [PATCH v5 0/9] Initial PVHv2 Dom0 support
  - From: Roger Pau Monne
- [Xen-devel] [PATCH v5 2/9] x86/iommu: add IOMMU entries for p2m_mmio_direct pages
  - From: Roger Pau Monne

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