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Gmane
From: <annie.li <at> oracle.com>
Subject: [PATCH V2 0/2] xen: patches for supporting sub-page and transitive grants
Newsgroups: gmane.comp.emulators.xen.devel
Date: Thursday 8th December 2011 09:35:40 UTC (over 5 years ago)
Hi

Following two 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.

Annie Li (2):
  xen/granttable: Support sub-page grants
  xen/granttable: Support transitive grants

 drivers/xen/grant-table.c |  147
+++++++++++++++++++++++++++++++++++++++++++++
 include/xen/grant_table.h |   25 ++++++++
 2 files changed, 172 insertions(+), 0 deletions(-)

Thanks
Annie

-- 
1.7.6.4
 
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