On Thu, Apr 25, 2013 at 08:19:48PM +0200, Fred . wrote: > With ACPI moved out of SeaBIOS to QEMU, how will ACPI work when using SeaBIOS > without QEMU? > > Like if using SeaBIOS with Boch, KVM or Coreboot?
KVM merged with QEMU, so it will use romfiles too. Others will have two options: - keep using that tables in seabios. With time we will be able to drop qemu-specific stuff in the tables which should make life easier for Bochs/coreboot. - add ACPI through romfiles like QEMU will do. Which one will be chosen will be up to relevant projects, but note how they benefit in any case. > > On Thu, Apr 25, 2013 at 11:02 AM, Michael S. Tsirkin <m...@redhat.com> wrote: > > Untested yet, but I thought I'd share the > BIOS bits so we can agree on direction. > > In particular check out ROM sizes: > - Before patchset with DSDT enabled > Total size: 127880 Fixed: 59060 Free: 3192 (used 97.6% of 128KiB > rom) > - Before patchset with DSDT disabled > Total size: 122844 Fixed: 58884 Free: 8228 (used 93.7% of 128KiB > rom) > - After patchset: > Total size: 128776 Fixed: 59100 Free: 2296 (used 98.2% of 128KiB > rom) > - Legacy disabled at build time: > Total size: 119836 Fixed: 58996 Free: 11236 (used 91.4% of 128KiB > rom) > > As can be seen from this, most size savings come > from dropping DSDT, but we do save a bit by removing > other tables. Of course the real reason to move tables to QEMU > is so that ACPI can better match hardware. > > This patchset adds an option to move all code for formatting acpi tables > out of BIOS. With this, QEMU has full control over the table layout. > All tables are loaded from the new "/etc/acpi/" directory. > Any entries in this directory cause BIOS to disable > ACPI table generation completely. > A generic linker script, controlled by QEMU, is > loaded from "/etc/linker-script". It is used to > patch in table pointers and checksums. > > BIOS still has limited ability to parse the tables, > for the following purposes: > - locate resume vector > - allocate RSDP in FSEG > - allocate FACS at an aligned address > > -- > MST > > > Michael S. Tsirkin (3): > linker: utility to patch in-memory ROM files > acpi: load and link tables from /etc/acpi/ > acpi: add an option to disable builtin tables > > Makefile | 2 +- > src/Kconfig | 12 +++++++- > src/acpi.c | 67 +++++++++++++++++++++++++++++++++++++++++++- > src/linker.c | 90 > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > src/linker.h | 50 +++++++++++++++++++++++++++++++++ > src/util.h | 1 + > 6 files changed, 219 insertions(+), 3 deletions(-) > create mode 100644 src/linker.c > create mode 100644 src/linker.h > > -- > MST > > _______________________________________________ > SeaBIOS mailing list > seab...@seabios.org > http://www.seabios.org/mailman/listinfo/seabios > >
