Re: [Xen-devel] [PATCH V4 0/3] xen: patches for supporting sub-page and transitive grants

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Dec 12, 2011 at 06:13:12PM +0800, annie.li@xxxxxxxxxx wrote:
> Hi
> 
> Following patches introduce and implement interfaces for sub-page and 
> transitive grants, and they are based on linux-next branch of 
> linux/kernel/git/konrad/xen.git(3.2.0-rc2+). Sub-page and transitive grants 
> are new types of grant table V2.
> 
> Descriptions for those patches:
> 
> Through sub-page grant table interfaces, a domain can grant another domain 
> access to a range of bytes within a page, and Xen will then prevent the 
> grantee domain accessing outside that range.  For obvious reasons, it isn't 
> possible to map these grant references, and domains are expected to use the 
> grant copy hypercall instead.
> 
> Through transitive grant interfaces,  a domain can create grant reference 
> which redirects to another grant reference, so that any attempt to access the 
> first grant reference will be redirected to the second one.  This is used to 
> implement receiver-side copy on inter-domain traffic: rather than copying the 
> packet in dom0, dom0 creates a transitive grant referencing the original 
> transmit buffer, and passes that to the receiving domain.
> 

Applied.

> Annie Li (3):
>   xen/granttable: Improve comments for function pointers
>   xen/granttable: Support sub-page grants
>   xen/granttable: Support transitive grants
> 
>  drivers/xen/grant-table.c |  190 
> +++++++++++++++++++++++++++++++++++++++------
>  include/xen/grant_table.h |   25 ++++++
>  2 files changed, 191 insertions(+), 24 deletions(-)
> 
> Thanks,
> Annie.
> -- 
> 1.7.6.4

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