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[Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver

From: Michael S. Tsirkin
Subject: [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver
Date: Sun, 28 Mar 2010 12:40:06 +0300
User-agent: Mutt/1.5.19 (2009-01-05)

On Sun, Mar 28, 2010 at 11:02:11AM +0300, Avi Kivity wrote:
> On 03/28/2010 10:47 AM, Michael S. Tsirkin wrote:
>>>> Maybe irqcontrol could be extended?
>>> What's irqcontrol?
>> uio accepts 32 bit writes to the char device file. We can encode
>> the fd number there, and use the high bit to signal assign/deassign.
> Ugh.  Very unexpandable.

It currently fails on any non-4 byte write.
So if we need more bits in the future we can always teach it
about e.g. 8 byte writes.

Do you think it's worth it doing it now already, and using
8 byte writes for msi mapping?

> -- 
> error compiling committee.c: too many arguments to function

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