wifi: iwlwifi: implement GLAI ACPI table loading

All the regulatory tables from BIOS are going to be loaded
(preferably) from the UEFI instead of the ACPI.
There is a security issue with the fact that anyone can
add these UEFI variables.
The solution for that is to have a lock for all WIFI GUID UEFI
variables, and only if the UEFI variables are locked then we can
read it.
The status of the lock (unlocked, locked, test mode) is indicated
in a ACPI table: Guid Lock ACPI Indicator.
Load this table so the driver knows whether to read from UEFI or
not

Signed-off-by: Miri Korenblit <[email protected]>
Reviewed-by: Gregory Greenman <[email protected]>
Link: https://msgid.link/20240128084842.53994809fbdd.I1bd10aafc387bc04f375e386861ee2bcb82f0a61@changeid
Signed-off-by: Johannes Berg <[email protected]>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/runtime.h b/drivers/net/wireless/intel/iwlwifi/fw/runtime.h
index 357727774db9..1ec2bcdf92b8 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/runtime.h
+++ b/drivers/net/wireless/intel/iwlwifi/fw/runtime.h
@@ -100,6 +100,9 @@ struct iwl_txf_iter_data {
  * @dump: debug dump data
  * @uats_enabled: VLP or AFC AP is enabled
  * @uats_table: AP type table
+ * @uefi_tables_lock_status: The status of the WIFI GUID UEFI variables lock:
+ *	0: Unlocked, 1 and 2: Locked.
+ *	Only read the UEFI variables if locked.
  */
 struct iwl_fw_runtime {
 	struct iwl_trans *trans;
@@ -175,6 +178,7 @@ struct iwl_fw_runtime {
 	u8 reduced_power_flags;
 	bool uats_enabled;
 	struct iwl_uats_table_cmd uats_table;
+	u8 uefi_tables_lock_status;
 #endif
 };