From: Rusty Russell <rusty@rustcorp.com.au>
To: Pawel Moll <pawel.moll@arm.com>, Marc Zyngier <Marc.Zyngier@arm.com>
Cc: "virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [PATCH] virtio-spec: Define virtio-mmio registers as LE
Date: Tue, 05 Mar 2013 11:11:48 +1100 [thread overview]
Message-ID: <87fw0ad7sr.fsf@rustcorp.com.au> (raw)
In-Reply-To: <1362141432.3052.28.camel@hornet>
Pawel Moll <pawel.moll@arm.com> writes:
> On Fri, 2013-03-01 at 11:21 +0000, Marc Zyngier wrote:
>> > Having said that, Rusty was contemplating enforcing LE config space in
>> > the new PCI layout...
>>
>> I wouldn't complain about that, and would like to see a similar thing on
>> MMIO.
>
> Wherever PCI goes, MMIO follows :-)
Yes, but if you switch from 'guest-endian' to 'little-endian' how will
you tell? For PCI, we'd detect it by using the new layout.
I'd rather you specify MMIO as little endian, and we fix the kernel
config accessors to be endian aware (ie. 8, 16, 32, 64-bit accessors).
Since noone BE is using MMIO right now, it's safe...
Thanks,
Rusty.
next prev parent reply other threads:[~2013-03-05 0:11 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-13 14:25 [RFC PATCH] virt_mmio: fix signature checking for BE guests Marc Zyngier
2013-02-13 15:08 ` Pawel Moll
2013-02-13 15:28 ` Marc Zyngier
2013-02-13 15:46 ` Pawel Moll
2013-02-13 16:40 ` Marc Zyngier
2013-02-13 16:53 ` Michael S. Tsirkin
2013-02-13 17:04 ` Marc Zyngier
2013-02-14 0:22 ` Rusty Russell
2013-02-14 10:54 ` [PATCH] virtio-spec: Define virtio-mmio registers as LE Pawel Moll
2013-02-15 3:57 ` Rusty Russell
2013-03-01 10:41 ` Marc Zyngier
2013-03-01 10:50 ` Pawel Moll
2013-03-01 11:21 ` Marc Zyngier
2013-03-01 12:37 ` Pawel Moll
2013-03-01 13:16 ` Marc Zyngier
2013-03-05 0:11 ` Rusty Russell [this message]
2013-03-06 15:10 ` Pawel Moll
2013-03-07 6:36 ` Rusty Russell
2013-02-15 0:07 ` [RFC PATCH] virt_mmio: fix signature checking for BE guests Benjamin Herrenschmidt
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