From mboxrd@z Thu Jan  1 00:00:00 1970
From: Aravindh Puthiyaparambil <aravindh@virtuata.com>
Subject: [PATCH 0 of 2] Add libxc API that sets mem_access type
 for an array of gfns
Date: Thu, 26 Apr 2012 11:33:29 -0700
Message-ID: <patchbomb.1335465209@vollum>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: xen-devel@lists.xen.org
Cc: tim@xen.org
List-Id: xen-devel@lists.xenproject.org

When the mem_access type needs to be changed for multiple discontiguous gfns, calling xc_hvm_set_mem_access() multiple times does not perform very well. The main pain points are the multiple libxc calls themselves plus the multiple map_domain_page() / unmap_domain_page() and ept_sync_domain() calls for each ept_set_entry(gfn). The following patches adds a new mem_access API that sets the mem_access type for an array of guest physical addresses in one libxc call with minimal map_domain_page() / unmap_domain_page() and ept_sync_domain() calls.

Signed-off-by: Aravindh Puthiyaparambil <aravindh@virtuata.com>