acpica: support parsing of arm64 affinity in acpi_pxm.c

[jchandra]

Summary

ACPI SRAT table on arm64 uses GICC entries to provide CPU locality information. These entries uses a AcpiProcessorUid to identify the cpu (unlike on x86 where entries have an APIC ID).

Update acpi_pxm.c to extend the cpus_add/cpus_find/cpus_get_info functions to be able to handle AcpiProcessorUid, and then use it when parsing ACPI_SRAT_GICC_AFFINITY entry for arm64.

Add dev/acpica/acpi_pxm.c to arm64 compilation if acpi is enabled.

[markj]

sys/dev/acpica/acpi_pxm.c

247

It doesn't really matter here, but this should be imin().

316

"APIC ID" looks like the wrong term.

[jchandra]

Thanks for the review, will update the diff.

sys/dev/acpica/acpi_pxm.c

247

This is a bug (had the Linux behavior in mind) - I should use imax() here.

316

Yes, will fix.

[jchandra]

Addressed markj's comments.

• use the UID instead of APIC id in prints for arm64
• the comment on 'max' is already handled in preceding commit

Also fixed one issue - in arm64 cpu_add was checking last_cpu limit incorrectly.