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Re: [Qemu-devel] [PATCH, RFC] Configuration device: add write channel, m

From: Gleb Natapov
Subject: Re: [Qemu-devel] [PATCH, RFC] Configuration device: add write channel, mark pages RO
Date: Mon, 8 Sep 2008 09:05:29 +0300

On Sun, Sep 07, 2008 at 09:56:56PM +0300, Blue Swirl wrote:
> Hi,
> The first patch extend the configuration device with a guest write
> capability. A callback is invoked when the buffer is full.
Looks useful. VMware back door allows for two way communication too.

> It's a bit odd to get completely different behavior when doing I/O to
> the same port just because of the word size used in the IO. I'd rather
> have two ports, one for control write or status read and another for
> data read/write. Is two ports too much to ask on a PC?
Lets use two ports for clarity.


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