On 11/18/25 2:59 AM, Ben Horgan wrote:

In actbl2.h, acpi_pptt_cache describes the fields in the original
Cache Type Structure. In PPTT table version 3 a new field was added at the
end, cache_id. This is described in acpi_pptt_cache_v1 but rather than
including all v1 fields it just includes this one.

In lieu of this being fixed in acpica, introduce acpi_pptt_cache_v1_full to
contain all the fields of the Cache Type Structure . Update the existing
code to use this new struct. This simplifies the code and removes a
non-standard use of ACPI_ADD_PTR.

Signed-off-by: Ben Horgan <ben.horgan@arm.com>
---
I have opened a pull request to acpica to update acpi_pptt_cache_v1 to
include all fields. https://github.com/acpica/acpica/pull/1059

Change since v4:
Use fields directly in acpi_pptt_cache_v1_full
Delay the casting

Changes since v3:
New patch
---
  drivers/acpi/pptt.c | 47 +++++++++++++++++++++++++++++++++++----------
  1 file changed, 37 insertions(+), 10 deletions(-)

With '__packed' added as pointed by Fenghua, LKTM.

Reviewed-by: Gavin Shan <redacted>