Re: [PATCH v4 1/2] ACPI/PPTT: Add support for ACPI 6.3 thread flag

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On 12/08/2019 12:59, Will Deacon wrote:
On Mon, Aug 12, 2019 at 11:06:07AM +0200, Rafael J. Wysocki wrote:
On Fri, Aug 9, 2019 at 12:25 AM Robert Richter <rrichter@xxxxxxxxxxx> wrote:

On 08.08.19 15:40:06, Jeremy Linton wrote:
ACPI 6.3 adds a flag to the CPU node to indicate whether
the given PE is a thread. Add a function to return that
information for a given linux logical CPU.

Signed-off-by: Jeremy Linton <jeremy.linton@xxxxxxx>
Reviewed-by: Sudeep Holla <sudeep.holla@xxxxxxx>
---
 drivers/acpi/pptt.c  | 53 +++++++++++++++++++++++++++++++++++++++++++-
 include/linux/acpi.h |  5 +++++
 2 files changed, 57 insertions(+), 1 deletion(-)

Reviewed-by: Robert Richter <rrichter@xxxxxxxxxxx>

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

and please push it through ARM64 along with the second patch.

Thanks. I'll push these into -next shortly.


Hi Jeremy,

We're considering requesting this support is backported to stable. We have a platform which incorrectly sets the MT bit. To update our firmware to PPTT v2, we need the kernel to support PPTT v2 also.

Please let me know if you anticipate an issue in this.

Cheers,
John


Will

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