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[Qemu-devel] Re: [PATCH v2] [0.12] Map BIOS f-segment as RAM, not as ROM


From: Anthony Liguori
Subject: [Qemu-devel] Re: [PATCH v2] [0.12] Map BIOS f-segment as RAM, not as ROM
Date: Fri, 04 Dec 2009 07:48:31 -0600
User-agent: Thunderbird 2.0.0.23 (X11/20090825)

Alexander Graf wrote:
SeaBIOS needs to write to the f-segment. So it needs to have some way to set
that from read-only to read-write, write in it and when it's done set it to
read-only again.

On PCI we have a mechanism for that. The ISA machine does not though. To stay
regression free and happily enable users to continue using the -M isapc machine
let's just map it as RAM. The BIOS on PCI will set it to r/o later either way.

Signed-off-by: Alexander Graf <address@hidden>

Thanks Alex. Figuring out what to do here has been on my todo and this seems like a reasonable solution.

Regards,

Anthony Liguori




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