From: "Michael S. Tsirkin" <mst@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Fam Zheng <famz@redhat.com>,
qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Amit Shah <amit.shah@redhat.com>
Subject: Re: [PATCH 00/18] virtio-blk: Support "VIRTIO_CONFIG_S_NEEDS_RESET"
Date: Mon, 20 Apr 2015 22:34:28 +0200 [thread overview]
Message-ID: <20150420223113-mutt-send-email-mst@redhat.com> (raw)
In-Reply-To: <55354F0A.5080809@redhat.com>
On Mon, Apr 20, 2015 at 09:10:02PM +0200, Paolo Bonzini wrote:
>
>
> On 20/04/2015 19:36, Michael S. Tsirkin wrote:
> > At the implementation level, there's one big issue you seem to have
> > missed: DMA to invalid memory addresses causes a crash in memory core.
> > I'm not sure whether it makes sense to recover from virtio core bugs
> > when we can't recover from device bugs.
>
> What do you mean exactly? DMA to invalid memory addresses causes
> address_space_map to return a "short read".
>
> Paolo
I mean, first of all, a bunch of virtio_XXX_phys calls.
These eventually call qemu_get_ram_ptr, which internally calls
qemu_get_ram_block and ramblock_ptr.
Both abort on errors.
--
MST
next prev parent reply other threads:[~2015-04-20 20:34 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1429257573-7359-1-git-send-email-famz@redhat.com>
2015-04-20 17:36 ` [PATCH 00/18] virtio-blk: Support "VIRTIO_CONFIG_S_NEEDS_RESET" Michael S. Tsirkin
2015-04-20 19:10 ` Paolo Bonzini
2015-04-20 20:34 ` Michael S. Tsirkin [this message]
2015-04-21 2:39 ` Fam Zheng
2015-04-21 6:52 ` Paolo Bonzini
2015-04-21 6:58 ` Michael S. Tsirkin
2015-04-21 2:37 ` [Qemu-devel] " Fam Zheng
2015-04-21 5:22 ` Michael S. Tsirkin
2015-04-21 5:50 ` Fam Zheng
2015-04-21 6:09 ` Michael S. Tsirkin
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