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cpu/x86/Kconfig: Mark 64bit support as stable

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With SMM holding page tables itself, we can consider SMM support stable
and safe enough for general use.

Also update the respective documentation.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: Ifcf0a1a5097a2d7c064bb709ec0b09ebee13a47d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80338
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
This commit is contained in:
Arthur Heymans
2024-02-02 19:35:13 +01:00
committed by Martin L Roth
parent ee83be4d75
commit d293b20b84
18 changed files with 25 additions and 34 deletions
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12
src/arch/x86/Kconfig
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@@ -65,23 +65,21 @@ config ARCH_ALL_STAGES_X86_64
select ARCH_ROMSTAGE_X86_64
select ARCH_RAMSTAGE_X86_64
config HAVE_EXP_X86_64_SUPPORT
config HAVE_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
config USE_X86_64_SUPPORT
bool "Run coreboot in long (64-bit) mode"
depends on HAVE_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.
irrespective of whether coreboot runs in 32-bit or 64-bit mode.
config PAGE_TABLES_IN_CBFS
bool