From: Marc Zyngier <marc.zyngier@arm.com>
To: Alexander Graf <agraf@suse.de>
Cc: Peter Maydell <peter.maydell@linaro.org>,
Will Deacon <Will.Deacon@arm.com>,
Pekka Enberg <penberg@kernel.org>,
"kvmarm\@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
"kvm\@vger.kernel.org" <kvm@vger.kernel.org>,
Greg Kurz <gkurz@linux.vnet.ibm.com>,
Rusty Russell <rusty@rustcorp.com.au>,
Michael Tsirkin <mst@redhat.com>
Subject: Re: [PATCH v3 9/9] kvmtool: virtio: enable arm/arm64 support for bi-endianness
Date: Wed, 07 May 2014 11:39:17 +0100 [thread overview]
Message-ID: <87ppjpootm.fsf@approximate.cambridge.arm.com> (raw)
In-Reply-To: <536A06C1.8010709@suse.de> (Alexander Graf's message of "Wed, 7 May 2014 11:11:13 +0100")
On Wed, May 07 2014 at 11:11:13 am BST, Alexander Graf <agraf@suse.de> wrote:
> On 05/07/2014 11:57 AM, Marc Zyngier wrote:
>> Huh? What if my guest has usespace using an idmap, with Stage-1 MMU for
>> isolation only (much like an MPU)? R-class guests anyone?
>>
>> Agreed, this is not the general use case, but that doesn't seem to be
>> completely unrealistic either.
>
> Yes, and once that user tries the same without idmap virtio ends up
> overwriting random memory.
And how different is that from the kernel suddenly deciding to use VAs
instead of PAs? Just as broken. Are we going to prevent the kernel from
using virtio?
> It's just not a good idea and I'd much rather see us solve this
> properly with virtio 1.0 really.
Again, what is virtio 1.0 doing here?
M.
--
Jazz is not dead. It just smells funny.
next prev parent reply other threads:[~2014-05-07 10:39 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-24 18:17 [PATCH v3 0/9] kvmtool: handle guests of a different endianness Marc Zyngier
2014-04-24 18:17 ` [PATCH v3 1/9] kvmtool: pass trapped vcpu to MMIO accessors Marc Zyngier
2014-04-24 18:17 ` [PATCH v3 2/9] kvmtool: virt_queue configuration based on endianness Marc Zyngier
2014-04-24 18:17 ` [PATCH v3 3/9] kvmtool: sample CPU endianness on virtio-mmio device reset Marc Zyngier
2014-04-24 18:17 ` [PATCH v3 4/9] kvmtool: add queue endianness initializer Marc Zyngier
2014-04-24 18:17 ` [PATCH v3 5/9] kvmtool: convert console backend to support bi-endianness Marc Zyngier
2014-04-24 18:17 ` [PATCH v3 6/9] kvmtool: convert 9p " Marc Zyngier
2014-04-24 18:17 ` [PATCH v3 7/9] kvmtool: convert blk " Marc Zyngier
2014-04-24 18:17 ` [PATCH v3 8/9] kvmtool: convert net " Marc Zyngier
2014-04-24 18:17 ` [PATCH v3 9/9] kvmtool: virtio: enable arm/arm64 support for bi-endianness Marc Zyngier
2014-05-06 14:28 ` Will Deacon
2014-05-06 17:25 ` Marc Zyngier
2014-05-06 18:38 ` Peter Maydell
2014-05-07 9:34 ` Peter Maydell
2014-05-07 9:42 ` Alexander Graf
2014-05-07 9:57 ` Marc Zyngier
2014-05-07 10:11 ` Alexander Graf
2014-05-07 10:30 ` Michael S. Tsirkin
2014-05-07 10:39 ` Marc Zyngier [this message]
2014-05-08 1:52 ` Rusty Russell
2014-05-07 9:52 ` Marc Zyngier
2014-05-07 9:55 ` Alexander Graf
2014-05-07 10:19 ` Marc Zyngier
2014-05-07 10:10 ` Peter Maydell
2014-05-07 10:46 ` Marc Zyngier
2014-05-07 11:49 ` Alexander Graf
2014-05-07 12:16 ` Marc Zyngier
2014-05-07 12:18 ` Peter Maydell
2014-05-07 10:40 ` Greg Kurz
2014-05-07 11:04 ` Marc Zyngier
2014-05-07 12:17 ` Peter Maydell
2014-05-07 12:25 ` Marc Zyngier
2014-05-07 12:27 ` Greg Kurz
2014-05-03 7:07 ` [PATCH v3 0/9] kvmtool: handle guests of a different endianness Pekka Enberg
2014-05-06 13:34 ` Will Deacon
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