[coreboot-gerrit] Change in coreboot[master]: cpu/x86/lapic: Unconditionally use CPUID leaf 0xb if available

[Kyösti Mälkki (Code Review)]

Attention is currently required from: Wonkyu Kim, Tim Wawrzynczak, Angel Pons, Felix Held.
Kyösti Mälkki has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58386 )

Change subject: cpu/x86/lapic: Unconditionally use CPUID leaf 0xb if available
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Patch Set 6:

(2 comments)

File src/cpu/x86/smm/smm_stub.S:

https://review.coreboot.org/c/coreboot/+/58386/comment/0507d036_303a6fa0 
PS4, Line 108: 	jc	1f
> the carry flag and zero flag are set as if `%eax - $0xb` is performed, so if the highest leaf is < 0 […]

Ack

https://review.coreboot.org/c/coreboot/+/58386/comment/6141b606_a1e2c523 
PS4, Line 124: 	cmp	(%ebx, %ecx, 2), %ax
> This is an idea for a follow-up, right?

Ack