Change in coreboot[master]: soc/intel/quark/Kconfig: don't unselect CPU_X86_LAPIC

[Felix Held (Code Review)]

Attention is currently required from: Patrick Rudolph.
Hello build bot (Jenkins), Marshall Dawson, Angel Pons, Patrick Rudolph,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/58550

to look at the new patch set (#2).

Change subject: soc/intel/quark/Kconfig: don't unselect CPU_X86_LAPIC
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soc/intel/quark/Kconfig: don't unselect CPU_X86_LAPIC

The Intel Quark SoC does have a LAPIC on its x86 CPU core, so we should
select CPU_X86_LAPIC. This will additionally include the Makefile from
cpu/x86/lapic. Since none of AP_IN_SIPI_WAIT, LEGACY_SMP_INIT and
UDELAY_LAPIC gets selected, only the boot_cpu.c and lapic.c targets will
be added to the build. Since SMP isn't set, adding the boot_cpu.c target
won't change the resulting binary of a timeless build, since the only
function inside will be removed by the compiler's pre-processor in the
!SMP case. So the only thing that will change the resulting binary is
the addition of the lapic.c target. From this target only the function
cpu_get_lapic_addr will be used which overrides the weak implementation
in acpi/acpi.c. The call in arch/x86/mpspec.c can be ignored, since
GENERATE_MP_TABLE isn't selected. So this change will result in the
LAPIC address in the MADT being changed from 0 to to LAPIC_DEFAULT_BASE.
Since the documentation of the Quark SoC mentions that it has a LAPIC on
its one x86 core, this should work.

TEST=None

Signed-off-by: Felix Held 
Change-Id: I2f163bd608f0548abb0e8de90843d2a796b8ef6c
---
M src/soc/intel/quark/Kconfig
1 file changed, 0 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/50/58550/2