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 got this in src/post.c:
// Allow writes to modify bios area (0xf0000)
make_bios_writable();
// Perform main setup code.
post();
...
// Write protect bios memory.
make_bios_readonly();
The names and comments are kind of misleading since make_bios_writable()
and make_bios_readonly() both seem to also affect the option roms.
Bad things could happen if someone modifies the BIOS because it's unprotected
(e.g. VM crash).
- Sebastian
