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Re: [Qemu-devel] Re: POST failure (loop) with isapc and seabios


From: Sebastian Herbszt
Subject: Re: [Qemu-devel] Re: POST failure (loop) with isapc and seabios
Date: Mon, 23 Nov 2009 18:57:47 +0100

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





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