From: "Michael S. Tsirkin" <mst@redhat.com>
To: Marcel Apfelbaum <marcel.a@redhat.com>
Cc: peter.maydell@linaro.org, qemu-devel@nongnu.org,
Anthony Liguori <anthony@codemonkey.ws>
Subject: Re: [Qemu-devel] [PATCH] hw/pci: completed master-abort emulation
Date: Tue, 24 Sep 2013 11:58:45 +0300 [thread overview]
Message-ID: <20130924085845.GA18980@redhat.com> (raw)
In-Reply-To: <1380012297.2050.78.camel@localhost.localdomain>
corrected Anthony's mail.
On Tue, Sep 24, 2013 at 11:44:57AM +0300, Marcel Apfelbaum wrote:
> > Not necessarily. Another bridge can claim it then
> > terminate with MA.
> >
> > Example:
> >
> > -[0000:00]-+-00.0
> > +-02.0
> > +-16.0
> > +-16.3
> > +-19.0
> > +-1a.0
> > +-1b.0
> > +-1c.0-[02]--
> > +-1c.1-[03]----00.0
> > +-1c.3-[05-0c]--
> > +-1c.4-[0d]--+-00.0
> > | \-00.3
> >
> >
> >
> > Device 03:00.0 writes to within memory window of 00:1c.4,
> > but outside BARs of both 0d:00.0 and 0d:00.3.
> >
> > On PCI, I think MA is set in sec status register of 00:1c.4.
> You are right, my code will work only under the assumption
> that the devices do not communicate between them.
> I will state the above in the next version.
>
> Thanks,
> Marcel
How hard is it to fix properly?
If that's hard, would it be easier to implement express
semantics unconditionally?
next prev parent reply other threads:[~2013-09-24 8:56 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-23 11:01 [Qemu-devel] [PATCH] hw/pci: completed master-abort emulation Marcel Apfelbaum
2013-09-23 11:27 ` Michael S. Tsirkin
2013-09-23 12:37 ` Marcel Apfelbaum
2013-09-23 13:45 ` Michael S. Tsirkin
2013-09-23 14:43 ` Marcel Apfelbaum
2013-09-23 15:10 ` Michael S. Tsirkin
2013-09-23 17:49 ` Marcel Apfelbaum
2013-09-23 18:45 ` Michael S. Tsirkin
2013-09-24 8:07 ` Marcel Apfelbaum
2013-09-24 8:29 ` Michael S. Tsirkin
2013-09-24 8:44 ` Marcel Apfelbaum
2013-09-24 8:58 ` Michael S. Tsirkin [this message]
2013-09-24 10:44 ` Marcel Apfelbaum
2013-09-24 10:55 ` Peter Maydell
2013-09-24 11:17 ` Marcel Apfelbaum
2013-09-24 11:21 ` Peter Maydell
2013-09-24 11:41 ` Marcel Apfelbaum
2013-09-24 15:41 ` Michael S. Tsirkin
2013-09-24 16:24 ` Michael S. Tsirkin
2013-09-24 23:36 ` Peter Maydell
2013-09-24 23:43 ` Michael S. Tsirkin
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