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From: "Sebastian Herbszt" <herbszt@gmx.de>
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Subject: Re: [Qemu-devel] Re: POST failure (loop) with isapc and seabios
Date: Mon, 23 Nov 2009 18:57:47 +0100
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To: Gleb Natapov <gleb@redhat.com>, Kevin O'Connor <kevin@koconnor.net>
Cc: qemu-devel@nongnu.org

Gleb Natapov wrote:
> On Sun, Nov 22, 2009 at 10:38:42AM -0500, Kevin O'Connor wrote:
>> On Sun, Nov 22, 2009 at 05:10:53PM +0200, Gleb Natapov wrote:
>> > On Sun, Nov 22, 2009 at 04:07:56PM +0100, Sebastian Herbszt wrote:
>> > > Gleb Natapov wrote:
>> > > >May be make qemu to map it writable if isapc is specified.
>> > > 
>> > > I don't think keeping the segment writable after POST is a good idea.
>> > > 
>> > Isn't it writable now after POST with pcipc? Why this is not a good
>> > idea?
>> 
>> SeaBIOS and bochs bios will make the f-segment readonly at the end of
>> post.  See make_bios_readonly() in src/shadow.c.
>> 
> I see SeaBIOS does this, but I don't see where bochs bios does this.

bios_lock_shadow_ram() in rombio32.c.

- Sebastian