Public bug reported:
[Impact]
Currently, we use the ACPI processor ID only for the leaf/processor nodes as
the specification states it must match the value of the ACPI processor ID field
in the processor’s entry in the MADT.
However, if a PPTT structure represents a processors group, it matches a
processor container UID in the namespace and the
ACPI_PPTT_ACPI_PROCESSOR_ID_VALID flag indicates whether the ACPI processor ID
is valid.
Let's use UID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set to be
consistent instead of using table offset as it's currently done for non-leaf
nodes.
Fixes: 2bd00bcd73e5 (ACPI/PPTT: Add Processor Properties Topology Table parsing)
[Fix]
This patch in is 4.18:
30998033f62a ACPI / PPTT: use ACPI ID whenever
ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set
[Test]
[Regression Potential]
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: cavium
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https://bugs.launchpad.net/bugs/1797200
Title:
[Bionic] ACPI / PPTT: use ACPI ID whenever
ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set
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