efdcb4634a
With LinuxBoot Linux relied on the legacy method of fetching the RSDP pointer to get ACPI. This uses a more modern approach available since 2018 on the Linux kernel, which involves filling in the zero page. This method takes precedence over any other method of fetching the RSDP in Linux (UEFI, Kexec, Legacy/BIOS). Some UEFI zealots are threatening that legacy code will be removed from Linux so it's best to already adapt to that possibility. Tested on Qemu: - With qemu the RSDP is always in the EBDA, so checking if Linux uses the provided pointer is better done with a forced bad entry - With a fake bad pointer Linux correctly does not find RDSP Change-Id: I688b94608b03b0177c42d2834c7e3beb802ae686 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Reviewed-on: https://review.coreboot.org/c/coreboot/+/62574 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Angel Pons <th3fanbus@gmail.com> |
||
|---|---|---|
| .. | ||
| bpdt_formats | ||
| console | ||
| flashmap | ||
| fpt_formats | ||
| lz4 | ||
| lzma | ||
| tests | ||
| .gitignore | ||
| EXAMPLE | ||
| Makefile | ||
| Makefile.inc | ||
| ProcessorBind.h | ||
| amdcompress.c | ||
| cbfs-mkpayload.c | ||
| cbfs-mkstage.c | ||
| cbfs-payload-linux.c | ||
| cbfs.h | ||
| cbfs_glue.h | ||
| cbfs_image.c | ||
| cbfs_image.h | ||
| cbfs_sections.c | ||
| cbfs_sections.h | ||
| cbfscomptool.c | ||
| cbfstool.c | ||
| coff.h | ||
| common.c | ||
| common.h | ||
| compress.c | ||
| cse_fpt.c | ||
| cse_fpt.h | ||
| cse_helpers.c | ||
| cse_helpers.h | ||
| cse_serger.c | ||
| cse_serger.h | ||
| default-x86.fmd | ||
| default.fmd | ||
| description.md | ||
| elf.h | ||
| elfheaders.c | ||
| elfparsing.h | ||
| elogtool.c | ||
| eventlog.c | ||
| eventlog.h | ||
| fdt.h | ||
| fit.c | ||
| fit.h | ||
| flashmap_tests.c | ||
| fmap_from_fmd.c | ||
| fmap_from_fmd.h | ||
| fmaptool.c | ||
| fmd.c | ||
| fmd.h | ||
| fmd_parser.c_shipped | ||
| fmd_parser.h_shipped | ||
| fmd_parser.y | ||
| fmd_scanner.c_shipped | ||
| fmd_scanner.h_shipped | ||
| fmd_scanner.l | ||
| fv.h | ||
| ifittool.c | ||
| ifwitool.c | ||
| linux.h | ||
| linux_trampoline.S | ||
| linux_trampoline.c | ||
| linux_trampoline.h | ||
| option.h | ||
| partitioned_file.c | ||
| partitioned_file.h | ||
| platform_fixups.c | ||
| rmodtool.c | ||
| rmodule.c | ||
| rmodule.h | ||
| xdr.c | ||