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src: Consolidate x86_64 support Kconfig

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Introduce `USE_EXP_X86_64_SUPPORT` in `src/arch/x86/Kconfig` and guard
it with `HAVE_EXP_X86_64_SUPPORT`. Replace the per-CPU implementations
of the same functionality with the newly-added Kconfig options. Update
documentation and the config file for QEMU accordingly.

Change-Id: I550216fd2a8323342d6b605306b0b95ffd5dcd1c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55760
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
This commit is contained in:
Angel Pons
2021-06-22 15:41:59 +02:00
parent 6f5a6581a6
commit 16fe5e1511
6 changed files with 23 additions and 17 deletions
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18
src/arch/x86/Kconfig
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@@ -63,6 +63,24 @@ config ARCH_ALL_STAGES_X86
bool
default y
config HAVE_EXP_X86_64_SUPPORT
bool
help
Enable experimental support to build and run coreboot in 64-bit mode.
When selecting this option for a new platform, it is highly advisable
to provide a config file for Jenkins to build-test the 64-bit option.
config USE_EXP_X86_64_SUPPORT
bool "[EXPERIMENTAL] Run coreboot in long (64-bit) mode"
depends on HAVE_EXP_X86_64_SUPPORT
select ARCH_ALL_STAGES_X86_64
help
When set, most of coreboot runs in long (64-bit) mode instead of the
usual protected flat (32-bit) mode. 64-bit CPUs and OSes can be used
irrespective of whether coreboot runs in 32-bit or 64-bit mode. This
is an experimental option: do not enable unless one wants to test it
and has the means to recover a system when coreboot fails to boot.
config ARCH_X86_64_PGTBL_LOC
hex "x86_64 page table location in CBFS"
depends on ARCH_BOOTBLOCK_X86_64