mbox series

[v3,0/2] arm64/PPTT ACPI 6.3 thread flag support

Message ID 20190628181457.6609-1-jeremy.linton@arm.com
Headers show
Series arm64/PPTT ACPI 6.3 thread flag support | expand

Message

Jeremy Linton June 28, 2019, 6:14 p.m. UTC 
ACPI 6.3 adds a flag to the CPU node to indicate whether
the given CPU is a thread. Add a function to return that
information for a given linux logical CPU and then utilize
it while building the arm64 topology.

v2->v3: Clarify and tweak the return from check_acpi_cpu_flag()
	Cache the PPTT table revision to avoid repeat
	      acpi_table_get/put calls in the case of
	      missing or old PPTT tables.

v1->v2:
	Return ENOENT instead on ENONET.

Jeremy Linton (2):
  ACPI/PPTT: Add support for ACPI 6.3 thread flag
  arm64: topology: Use PPTT to determine if PE is a thread

 arch/arm64/kernel/topology.c |  8 +++--
 drivers/acpi/pptt.c          | 62 +++++++++++++++++++++++++++++++++++-
 include/linux/acpi.h         |  5 +++
 3 files changed, 71 insertions(+), 4 deletions(-)

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2.21.0