[SeaBIOS] Moving BIOS tables from SeaBIOS to QEMU

[Laszlo Ersek]

On 02/26/13 10:03, Gerd Hoffmann wrote:

> Can tianocore grab acpi tables from coreboot?

Not that I know of. (... It may have been a rhetorical question.)

When running on Xen, an area is searched for the RSDP, and linked tables
(prepared by Xen's hvmloader I think) are installed by OVMF.

When running on qemu, static tables are used. I strived to adapt them as
much as I could to qemu hardware. Some tables (recognized by header) are
copied & modified dynamically before installation: MADT, SSDT.

Getting a precise picture of qemu hardware in the form of ACPI tables
(over fw_cfg) would not only allow OVMF to pass on better tables to
OSPM; OVMF could *maybe* use them itself. They might allow us to remove
hard-wired BDFs, ports, ranges etc. in platform initialization
(OvmfPkg/PlatformPei) and even in boot device selection
(OvmfPkg/Library/PlatformBdsLib/BdsPlatform.c).

Laszlo