WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] Call hypercall straightly from user space

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
Subject: [Xen-devel] Call hypercall straightly from user space
From: "Xu, Anthony" <anthony.xu@xxxxxxxxx>
Date: Sat, 30 Dec 2006 16:03:19 +0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Sat, 30 Dec 2006 00:03:09 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Accr6PfCrVSZe50lQCCwjsW6cCTt7w==
Thread-topic: [Xen-devel] Call hypercall straightly from user space
Hi keir,

As you mention before, we may call hypercall straightly from user space 
rather than bouncing through guest kernel.

I'm planning to do this.

I want to modifty three hypercalls first.( I think they are frequently
used).
1. send_event_pending,
2. hvm_set_isa_irq_level,
3. hvm_set_pci_intx_level.


In the first hypercall, it sends port through pointer rather than value.
Thus it's difficult to call send_event_pending from user space due to 
there is no similar mechanism as xencomm in user space.

Is it possible we pass port through value in send_event_pending
hypercall?

If you agree.
I would like to do this.


--Anthony

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel