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[Qemu-devel] Re: [PATCHv2-repost] pcbios: enable io/memory unconditional

From: Anthony Liguori
Subject: [Qemu-devel] Re: [PATCHv2-repost] pcbios: enable io/memory unconditionally
Date: Mon, 30 Nov 2009 10:00:23 -0600
User-agent: Thunderbird (X11/20090825)

Michael S. Tsirkin wrote:
On Thu, Oct 08, 2009 at 05:52:56PM +0200, Michael S. Tsirkin wrote:
VGA adapters need to claim memory and i/o
transactions even if they do not have any
i/o or memory bars. E.g. PCI spec, page 297,
gives an example of such a device:

        Programming interface 0000 0000b
        VGA-compatible controller. Memory
        addresses 0A 0000h through 0B
        FFFFh. I/O addresses 3B0h to 3BBh
        and 3C0h to 3DFh and all aliases of
        these addresses.

While we could check for these devices and special-case them, it is
easier to fix this by enabling i/o and memory space unconditionally:
devices that do not support it will just ignore this setting.

Signed-off-by: Michael S. Tsirkin <address@hidden>

This is for stable?


This patch is needed for qemu-kvm as that is still using pcbios.

Why hasn't qemu-kvm switched to seabios?


Anthony Liguori

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