ACPI: APEI: EINJ: Discover EINJv2 parameters

Browse source

The EINJv2 set_error_type_with_address structure has a flex array
to hold the component IDs and syndrome values used when injecting
multiple errors at once.

Discover the size of this array by taking the address from the
ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS entry in the EINJ table
and reading the BIOS copy of the structure.

Derive the maximum number of components from the length field
in the einjv2_extension_struct at the end of the BIOS copy.

Map the whole of the structure into kernel memory (and unmap
on module unload).

[Tony: Code unchanged from Zaid's original. New commit message]

Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com>
Link: https://patch.msgid.link/20250617193026.637510-5-zaidal@os.amperecomputing.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

...

This commit is contained in:

Zaid Alali 2025-06-17 12:30:23 -07:00 • committed by Rafael J. Wysocki

parent 21cd921b1a

commit 691a0f0a55

1 changed files with 24 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

26

drivers/acpi/apei/einj-core.c

View file