On Tue, Sep 11, 2012 at 11:15:50AM -0500, Anthony Liguori wrote: > Jan Kiszka <jan.kiszka@xxxxxxxxxxx> writes: > > On 2012-09-11 05:02, Kevin O'Connor wrote: > >> The easiest way to fix this is to change QEMU to boot with the area > >> read-write. There's no real gain in booting with the memory read-only > >> as the first thing SeaBIOS does is make it read-write. > > > > Considering SeaBIOS, that is true. If Seabios depends inherently on > > shadow ROMs and as we have no real chipset for isapc to control > > shadowing behavior, that will likely be the best option. Can have a > > look. > > I've never really understood this. > > Why do we need ISAPC? An ISA-only OS would still be okay on a system > with an i440fx and no PCI devices, no? > > I think that makes a lot more sense because then SeaBIOS doesn't have to > deal with the notion of ISAPC. Regardless of whether or not there is a need to support an isapc machine, I think it would still be preferable to boot with the 0xc0000-0x100000 memory in read-write mode. The SeaBIOS code to make that memory read-write without being able to modify any of that ram is awkward. -Kevin -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
