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[Qemu-devel] Insane virtio-serial semantics (was: [PATCH v2 4/5] backdoo
From: |
Markus Armbruster |
Subject: |
[Qemu-devel] Insane virtio-serial semantics (was: [PATCH v2 4/5] backdoor: [softmmu] Add QEMU-side proxy to "libbackdoor.a") |
Date: |
Wed, 07 Dec 2011 09:21:01 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) |
Anthony Liguori <address@hidden> writes:
> On 12/06/2011 04:30 PM, Lluís Vilanova wrote:
>> Anthony Liguori writes:
>>
>>> I really worry about us introducing so many of these one-off paravirtual
>>> devices.
>>> I would much prefer that you look at doing this as an extension to the
>>> ivshmem
>>> device as it already has this sort of scope. You should be able to do this
>>> by
>>> just extending the size of bar 1 and using a well known guest id.
>>
>> I did in fact look at ivshmem some time ago, and it's true that both use the
>> same mechanisms; but each device has a completely different purpose. To me it
>> just seems that extending the control BAR in ivshmem to call the
>> user-provided
>> backdoor callbacks is just conflating two completely separate devices into a
>> single one. Besides, I think that the qemu-side of the backdoor is simple
>> enough
>> to avoid being a maintenance burden.
>
> They have the same purpose (which are both vague TBH). The only
> reason I'm sympathetic to this device is that virtio-serial has such
> insane semantics.
Could you summarize what's wrong? Is it fixable?
[...]
- Re: [Qemu-devel] [PATCH v2 1/5] backdoor: Add documentation, (continued)
- [Qemu-devel] [PATCH v2 2/5] backdoor: Add build infrastructure, Lluís Vilanova, 2011/12/05
- [Qemu-devel] [PATCH v2 3/5] backdoor: [*-user] Add QEMU-side proxy to "libbackdoor.a", Lluís Vilanova, 2011/12/05
- [Qemu-devel] [PATCH v2 4/5] backdoor: [softmmu] Add QEMU-side proxy to "libbackdoor.a", Lluís Vilanova, 2011/12/05
- Re: [Qemu-devel] [PATCH v2 4/5] backdoor: [softmmu] Add QEMU-side proxy to "libbackdoor.a", Anthony Liguori, 2011/12/06
- Re: [Qemu-devel] [PATCH v2 4/5] backdoor: [softmmu] Add QEMU-side proxy to "libbackdoor.a", Lluís Vilanova, 2011/12/06
- Re: [Qemu-devel] [PATCH v2 4/5] backdoor: [softmmu] Add QEMU-side proxy to "libbackdoor.a", Anthony Liguori, 2011/12/06
- Re: [Qemu-devel] [PATCH v2 4/5] backdoor: [softmmu] Add QEMU-side proxy to "libbackdoor.a", Peter Maydell, 2011/12/06
- [Qemu-devel] Insane virtio-serial semantics (was: [PATCH v2 4/5] backdoor: [softmmu] Add QEMU-side proxy to "libbackdoor.a"),
Markus Armbruster <=
- Re: [Qemu-devel] Insane virtio-serial semantics, Anthony Liguori, 2011/12/07
- Re: [Qemu-devel] Insane virtio-serial semantics, Michael Roth, 2011/12/07
- Re: [Qemu-devel] Insane virtio-serial semantics, Anthony Liguori, 2011/12/07
- Re: [Qemu-devel] Insane virtio-serial semantics, Markus Armbruster, 2011/12/08
- Re: [Qemu-devel] Insane virtio-serial semantics, Anthony Liguori, 2011/12/08
- Re: [Qemu-devel] [PATCH v2 4/5] backdoor: [softmmu] Add QEMU-side proxy to "libbackdoor.a", Lluís Vilanova, 2011/12/06
[Qemu-devel] [PATCH v2 5/5] backdoor: Add guest-side library, Lluís Vilanova, 2011/12/05
Re: [Qemu-devel] [PATCH v2 0/5] backdoor: lightweight guest-to-QEMU backdoor channel, Anthony Liguori, 2011/12/06