From: Carsten Otte <cotte-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
To: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
Cc: Eric Van Hensbergen
<ericvanhensbergen-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>,
kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
lguest <lguest-mnsaURCQ41sdnm+yROfE0A@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
virtualization-qjLDD68F18O7TbgM5vRIOg@public.gmane.org
Subject: Re: [PATCH 3/3] virtio PCI device
Date: Tue, 27 Nov 2007 10:09:50 +0100 [thread overview]
Message-ID: <474BDEDE.6060603@de.ibm.com> (raw)
In-Reply-To: <474BDD28.7050801-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
Avi Kivity wrote:
> No, definitely not define a hypercall ABI. The feature bit should say
> "this device understands a hypervisor-specific way of kicking. consult
> your hypervisor manual and cpuid bits for further details. should you
> not be satisfied with this method, port io is still available".
...unless you're lucky enough to be on s390 where pio is not available.
I don't see why we'd have two different ways to talk to a virtio
device. I think we should use a hypercall for interrupt injection,
without support for grumpy old soldered pci features other than
HPA-style Lguest PCI bus organization. There are no devices that we
want to be backward compatible with.
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WARNING: multiple messages have this Message-ID (diff)
From: Carsten Otte <cotte@de.ibm.com>
To: Avi Kivity <avi@qumranet.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>,
Eric Van Hensbergen <ericvanhensbergen@us.ibm.com>,
kvm-devel@lists.sourceforge.net, lguest <lguest@ozlabs.org>,
linux-kernel@vger.kernel.org, virtualization@lists.osdl.org
Subject: Re: [kvm-devel] [PATCH 3/3] virtio PCI device
Date: Tue, 27 Nov 2007 10:09:50 +0100 [thread overview]
Message-ID: <474BDEDE.6060603@de.ibm.com> (raw)
In-Reply-To: <474BDD28.7050801@qumranet.com>
Avi Kivity wrote:
> No, definitely not define a hypercall ABI. The feature bit should say
> "this device understands a hypervisor-specific way of kicking. consult
> your hypervisor manual and cpuid bits for further details. should you
> not be satisfied with this method, port io is still available".
...unless you're lucky enough to be on s390 where pio is not available.
I don't see why we'd have two different ways to talk to a virtio
device. I think we should use a hypercall for interrupt injection,
without support for grumpy old soldered pci features other than
HPA-style Lguest PCI bus organization. There are no devices that we
want to be backward compatible with.
next prev parent reply other threads:[~2007-11-27 9:09 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-08 2:46 [PATCH 0/3] virtio PCI driver Anthony Liguori
[not found] ` <11944899922822-git-send-email-aliguori-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-08 2:46 ` [PATCH 1/3] Export vring functions for modules to use Anthony Liguori
2007-11-08 2:46 ` Anthony Liguori
[not found] ` <11944900141678-git-send-email-aliguori-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-08 2:46 ` [PATCH 2/3] Put the virtio under the virtualization menu Anthony Liguori
2007-11-08 2:46 ` Anthony Liguori
[not found] ` <11944900152750-git-send-email-aliguori-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-08 2:46 ` [PATCH 3/3] virtio PCI device Anthony Liguori
2007-11-08 2:46 ` Anthony Liguori
[not found] ` <11944900163817-git-send-email-aliguori-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-08 6:12 ` Avi Kivity
2007-11-08 6:12 ` [kvm-devel] " Avi Kivity
[not found] ` <4732A8E5.6090307-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-08 13:54 ` Anthony Liguori
2007-11-08 13:54 ` [kvm-devel] " Anthony Liguori
[not found] ` <47331531.8070709-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-08 14:37 ` Avi Kivity
2007-11-08 14:37 ` [kvm-devel] " Avi Kivity
[not found] ` <47331F47.70304-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-08 15:06 ` Anthony Liguori
2007-11-08 15:06 ` [kvm-devel] " Anthony Liguori
[not found] ` <473325EB.5090907-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-08 15:13 ` Avi Kivity
2007-11-08 15:13 ` [kvm-devel] " Avi Kivity
2007-11-08 23:43 ` Dor Laor
2007-11-08 23:43 ` [kvm-devel] " Dor Laor
2007-11-08 15:24 ` Arnd Bergmann
2007-11-08 17:46 ` Arnd Bergmann
2007-11-08 17:46 ` [kvm-devel] " Arnd Bergmann
[not found] ` <200711081846.36821.arnd-r2nGTMty4D4@public.gmane.org>
2007-11-08 19:04 ` Anthony Liguori
2007-11-08 19:04 ` [kvm-devel] " Anthony Liguori
[not found] ` <47335DC6.7090603-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-09 11:03 ` Arnd Bergmann
2007-11-09 11:03 ` [kvm-devel] " Arnd Bergmann
2007-11-09 0:39 ` Dor Laor
2007-11-09 0:39 ` [kvm-devel] " Dor Laor
[not found] ` <4733AC3A.20701-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-09 2:17 ` Anthony Liguori
2007-11-09 2:17 ` [kvm-devel] " Anthony Liguori
2007-11-20 15:01 ` Avi Kivity
2007-11-20 15:43 ` Anthony Liguori
2007-11-20 15:43 ` Anthony Liguori
[not found] ` <474300AD.4060509-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-20 16:12 ` Avi Kivity
2007-11-20 16:12 ` [kvm-devel] " Avi Kivity
[not found] ` <4743076F.8000105-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-20 22:16 ` Anthony Liguori
2007-11-20 22:16 ` [kvm-devel] " Anthony Liguori
[not found] ` <47435CCB.1050506-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-21 7:13 ` Avi Kivity
2007-11-21 7:13 ` [kvm-devel] " Avi Kivity
[not found] ` <4743DAA4.70800-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-21 18:22 ` Zachary Amsden
2007-11-21 18:22 ` [kvm-devel] " Zachary Amsden
[not found] ` <1195669377.6352.247.camel-cxY/u30q8FloTgUnLF1by8fTvwmfpRNyZeezCHUQhQ4@public.gmane.org>
2007-11-22 7:32 ` Avi Kivity
2007-11-22 7:32 ` [kvm-devel] " Avi Kivity
2007-11-23 16:51 ` Anthony Liguori
2007-11-23 16:51 ` Anthony Liguori
[not found] ` <4747051C.3090903-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-23 17:47 ` Avi Kivity
2007-11-23 17:47 ` [kvm-devel] " Avi Kivity
2007-11-26 19:18 ` Anthony Liguori
[not found] ` <474B1BF3.20901-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
2007-11-27 9:02 ` Avi Kivity
2007-11-27 9:02 ` [kvm-devel] " Avi Kivity
[not found] ` <474BDD28.7050801-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-27 9:09 ` Carsten Otte [this message]
2007-11-27 9:09 ` Carsten Otte
[not found] ` <474BDEDE.6060603-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
2007-11-27 9:27 ` Avi Kivity
2007-11-27 9:27 ` Avi Kivity
[not found] ` <474BE319.502-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-27 10:12 ` Carsten Otte
2007-11-27 10:12 ` [kvm-devel] " Carsten Otte
[not found] ` <474BEDAB.3000305-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
2007-11-27 10:19 ` Avi Kivity
2007-11-27 10:19 ` [kvm-devel] " Avi Kivity
[not found] ` <474BEF28.9010005-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-27 10:28 ` Carsten Otte
2007-11-27 10:28 ` [kvm-devel] " Carsten Otte
[not found] ` <474BF157.3080709-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
2007-11-27 13:27 ` Dor Laor
2007-11-27 9:25 ` Arnd Bergmann
2007-11-27 9:25 ` Arnd Bergmann
2007-11-27 9:25 ` [kvm-devel] " Arnd Bergmann
2007-11-08 6:49 ` [PATCH 2/3] Put the virtio under the virtualization menu Avi Kivity
2007-11-08 6:49 ` [kvm-devel] " Avi Kivity
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