[SeaBIOS] [PATCH 0/9] q35 seabios support take #1
pbonzini at redhat.com
Fri Sep 14 09:23:46 CEST 2012
Il 13/09/2012 22:12, Jason Baron ha scritto:
> Subject: [PATCH 0/9] q35 seabios support take #1
> Seabios bits for q35 support, I'm posting the qemu changes separately. The
> patches require '-M pc_q35' and -L 'seabios dir with q35 changes' on the
> qemu command line. Hopefully, we can make it the default for x86 at some future
> point when we feel comfortable with it.
The main question, IMHO, is how to proceed for supporting both PIIX4 and
q35. The two extreme possibilities are:
- use a single binary for everything
- use two binaries for everything
Right now, you do a mix of the two, where you have two DSDTs and one
binary. Furthermore, PIIX4 is still a "preferred" chipset in that its
DSDT is embedded in SeaBIOS and q35's isn't.
With more than one chipset being supported, and with the desire to
support OVMF/UEFI as an alternative firmware, I think it makes sense to
move QEMU towards a model more similar to CoreBoot's, where QEMU itself
makes the default ACPI tables and passes them to SeaBIOS or OVMF via fw_cfg.
So my favorite choice is to move the DSDT to fw_cfg, and keep a single
binary for everything else. I don't really care whether the DSDT
sources live in the SeaBIOS or QEMU repository, though the former makes
more sense until all things ACPI are done in QEMU.
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