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cpu/x86: Allow SoC to select the `X2APIC_LATE_WORKAROUND` 

Intel Meteor Lake SoC expects to select late x2APIC enablement where
AP bring up will use xAPIC and later x2APIC gets enabled using CPU init.

This patch provides an option where SoC code choose the correct
LAPIC access mode using choice selection.

BUG=b:219061518, b:219053812
TEST=Able to build Google/Rex.

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I6b50a0f5e39a95c25cd2c72219d2b402550a6fad
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65786
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Subrata Banik 2022-07-12 11:06:15 +00:00 committed by Felix Held
parent 2125a17c6a
commit 55d300c11b
1 changed files with 6 additions and 0 deletions
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6
src/cpu/x86/Kconfig
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@ -31,10 +31,16 @@ config DEFAULT_X2APIC_RUNTIME
help
Allow SoC code to set LAPIC_ACCESS_MODE to X2APIC_RUNTIME.
config DEFAULT_X2APIC_LATE_WORKAROUND
def_bool n
help
Allow SoC code to set LAPIC_ACCESS_MODE to X2APIC_LATE_WORKAROUND.
choice LAPIC_ACCESS_MODE
prompt "APIC operation mode"
default X2APIC_ONLY if DEFAULT_X2APIC
default X2APIC_RUNTIME if DEFAULT_X2APIC_RUNTIME
default X2APIC_LATE_WORKAROUND if DEFAULT_X2APIC_LATE_WORKAROUND
default XAPIC_ONLY
config XAPIC_ONLY