RE: [Xen-devel] GNTTAB_copy

["Kumar, Venkat" <Venkat.Kumar@xxxxxxx>]

Steve,

I have ported the GNTTAB_copy part from netchannel2 xen-unstable to 
xen-unstable. But the hypercall is failing with a status -1.

xm dmesg says
===========================================
Bad flags (0) or dom (0). (expected dom 9)
===========================================

I am granting the page with a flag ( GTF_reading | GTF_writing & 
GTF_permit_access ) but still it did not work.

What could be wrong here?

Venkat

-----Original Message-----
From: Steven Smith [mailto:steven.smith@xxxxxxxxxx]
Sent: Friday, January 30, 2009 4:52 PM
To: Kumar, Venkat
Cc: Steven Smith; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] GNTTAB_copy

That's unfortunate; the repository works fine for me.

There aren't any other ways of downloading the entire repository, but
the changes you need to make are pretty self-contained, so I've
attached the relevant cset.  You'll need to get rid of the
GNTTABOP_set_version bits, but apart from that it should all be fairly
obvious.

Steven.


> Steven - Thanks for the pointer.
> I get an error while downloading the code.
>
> =======================================================================
> hg clone http://xenbits.xensource.com/ext/netchannel2/xen-unstable.hg
> destination directory: xen-unstable.hg
> requesting all changes
> adding changesets
> transaction abort!
> rollback completed
> abort: Connection reset by peer
> =======================================================================
>
> Do you know any alternate download?
>
> Venkat
>
> -----Original Message-----
> From: Steven Smith [mailto:steven.smith@xxxxxxxxxx]
> Sent: Friday, January 30, 2009 4:18 PM
> To: Kumar, Venkat
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] GNTTAB_copy
>
> > Is GNTTAB_copy command in the Hypercall "HYPERVISOR_grant_table_op"
> > supported between two HVM's?
> It's not in xen-unstable, no, but it is if you use the netchannel2
> hypervisor (available from
> http://xenbits.xensource.com/ext/netchannel2/xen-unstable.hg).  It'd
> be pretty easy to cross-port, if you wanted to have a go at that.  The
> interesting cset is this one:
>
> changeset:   19112:ea4b9c439ac3
> user:        Steven Smith <steven.smith@xxxxxxxxxxxxx>
> date:        Thu Jan 22 09:53:12 2009 +0000
> files:       xen/arch/x86/hvm/hvm.c xen/include/xen/hypercall.h
> description:
> Allow GNTABOP_copy to be used from HVM domains.
>
> Steven.

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