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Re: [Xen-devel] [PATCH v4 5/9] xen_backend: add an emulation of grant copy

To: Paul Durrant <paul.durrant@xxxxxxxxxx>
From: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Date: Fri, 18 May 2018 11:44:41 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Stefano Stabellini <sstabellini@xxxxxxxxxx>, qemu-devel@xxxxxxxxxx, qemu-block@xxxxxxxxxx
Delivery-date: Fri, 18 May 2018 10:44:48 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On Thu, May 17, 2018 at 04:35:54PM +0100, Paul Durrant wrote:
> Not all Xen environments support the xengnttab_grant_copy() operation.
> E.g. where the OS is FreeBSD or Xen is older than 4.8.0.
> 
> This patch introduces an emulation of that operation using
> xengnttab_map_domain_grant_refs() and memcpy() for those environments.
> 
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>

Reviewed-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>

-- 
Anthony PERARD

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References:
- [Xen-devel] [PATCH v4 0/9] xen_disk: legacy code removal and cleanup
  - From: Paul Durrant
- [Xen-devel] [PATCH v4 5/9] xen_backend: add an emulation of grant copy
  - From: Paul Durrant

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