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arch/x86: Fix MAX_CPUS check proper for late X2APIC config 

The X2APIC_LATE_WORKAROUND kconfig allows bringing APs in XAPIC mode initially hence, it won't work if LAPIC ID is > 0xff.

This patch ensures the MAX_CPUS logic is appropriate while selecting X2APIC_LATE_WORKAROUND kconfig from SoC.

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

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I466e6cc568024a9dea80af21e0ebf3572e74a1f1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66110
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
This commit is contained in:
Subrata Banik 2022-07-24 11:19:04 +05:30 committed by Felix Held
parent 4b31af493d
commit fb28799ed5
1 changed files with 1 additions and 1 deletions
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src/cpu/x86/Kconfig
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@ -60,7 +60,7 @@ config X2APIC_RUNTIME
config X2APIC_LATE_WORKAROUND
prompt "Use XAPIC for AP bringup, then change to X2APIC"
bool
depends on PARALLEL_MP && MAX_CPUS < 255
depends on PARALLEL_MP && MAX_CPUS < 256
help
Choose this option if the platform supports dynamic switching between
XAPIC to X2APIC. The initial Application Processors (APs) are configured