From: Keir Fraser <keir@xen.org>
To: Daniel Castro <evil.dani@gmail.com>,
Ian Campbell <Ian.Campbell@citrix.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"Tim (Xen.org)" <tim@xen.org>
Subject: Re: hvm crash on hypercall event channel
Date: Wed, 11 Apr 2012 13:44:54 +0100 [thread overview]
Message-ID: <CBAB3B56.3D923%keir@xen.org> (raw)
In-Reply-To: <CAP2B859XfBRU+APY_2M_-rDRaaarLw_BSKK3gDfbipeVAHzjtQ@mail.gmail.com>
On 11/04/2012 13:24, "Daniel Castro" <evil.dani@gmail.com> wrote:
>> It's looking likely that you'll have to go to 32 bit mode to do all of
>> the actual I/O associated with the PV devices. That ought to simplify a
>> bunch of stuff WRT handling the rings etc too.
>
> What are my choices?
> 1. Add support for 16bit hypercalls on Xen.
> 2. Jump to 32 bit
I think this is best. Compile the 32-bit drivers as 32-bit code, then use
stubs to transfer between 16-bit and 32-bit execution modes at run time. Our
old rombios has code you could borrow for this, if seabios doesn't already
have such functionality.
-- Keir
> 3. make a 16bit "special" hypercall on SeaBIOS
> 4. Any other choice?
>
> Thanks to all the comments.
next prev parent reply other threads:[~2012-04-11 12:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-10 11:30 hvm crash on hypercall event channel Daniel Castro
2012-04-10 12:09 ` Keir Fraser
2012-04-10 12:13 ` Tim Deegan
2012-04-11 12:02 ` Daniel Castro
2012-04-11 12:06 ` Ian Campbell
2012-04-11 12:24 ` Daniel Castro
2012-04-11 12:44 ` Keir Fraser [this message]
2012-04-12 7:22 ` Daniel Castro
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