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Re: [Xen-devel] [PATCH 0/2] x86: Enabling emulated MSI injection

To: Keir Fraser <keir.xen@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 0/2] x86: Enabling emulated MSI injection
From: Wei Liu <liuw@xxxxxxxxx>
Date: Thu, 26 May 2011 13:05:45 +0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
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On Thu, May 26, 2011 at 12:49 PM, Keir Fraser <keir.xen@xxxxxxxxx> wrote:
> On 26/05/2011 04:06, "Wei Liu" <liuw@xxxxxxxxx> wrote:
>> This patch series enables Xen to deliver emulated MSI for upstream QEMU.
>> To achieve this goal, a new HVM operation -- HVMOP_inj_msi -- is
>> added. Also the VMSI handling code for x86 is refactored. Libxc is
>> modified as well.
>> Tested with VirtIO net and VirtIO disk.
>> Signed-off-by: Wei Liu <liuw@xxxxxxxxx>
> Don't renumber existing HVMOPs, some of the numbers are baked into our guest
> ABI. Define your new HVMOP at the end, and enclose in if defined(__XEN__) ||
> defined(__XEN_TOOLS__) -- it is only used by toolstack (qemu) and this gives
> us flexibility to change your new interface in future if we need to, as this
> tells us it is not baked into the guest ABI.

Oops... I mistaken that it should go into the guest ABI. Change it later.

> Apart from that, collect an Ack from Stefano that this integrates okay with
> his pirq/emuirq stuff for delivering HVM interrupts on event channels. It
> may be that you're going in at a slightly too raw level. Stefano wrote a
> bunch of the pirq stuff so he can advise on that.
>  -- Keir

OK. Waiting for his reply.

Best regards
Wei Liu
Twitter: @iliuw
Site: http://liuw.name

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