kernel/linux.git/arch/s390/include/asm/ap.h, branch linux-7.0.y

s390/ap: Fix typo in function name reference

2026-01-02T12:23:48+00:00

Add missing s into ap_intructions_available. Signed-off-by: Julia Lawall Reviewed-by: Jimmy Brisson Signed-off-by: Heiko Carstens

s390/ap: Extend struct ap_queue_status with some convenience fields

2025-10-21T09:09:21+00:00

Sometimes there is a different view of the AP status word needed. So here is slight rework of the struct ap_queue_status to open up the possibility to have different ways of accessing the AP status bits and fields. The new struct ap_queue_status struct ap_queue_status { union { unsigned int value : 32; struct { unsigned int status_bits : 8; unsigned int rc : 8; unsigned int : 16; }; struct { unsigned int queue_empty : 1; unsigned int replies_waiting : 1; unsigned int queue_full : 1; unsigned int : 3; unsigned int async : 1; unsigned int irq_enabled : 1; unsigned int response_code : 8; unsigned int : 16; }; }; }; comprises the old struct ap_queue_status but extends it to have this also accessible as an unsigned int required for example for a simple print or trace of the whole value. Note that this rework is fully backward compatible to the existing code exploiting the struct ap_queue_status. Signed-off-by: Harald Freudenberger Reviewed-by: Anthony Krowiak Reviewed-by: Holger Dengler Signed-off-by: Heiko Carstens

s390: Remove superfluous newlines from inline assemblies

2025-09-29T11:52:08+00:00

Remove superfluous newlines from inline assemblies. Compilers use the number of lines of inline assemblies as heuristic for the complexity and inline decisions. Therefore inline assemblies should only contain as many lines as required. A lot of inline assemblies contain a superfluous newline for the last line. Remove such newlines to improve compiler inlining decisions. Suggested-by: Juergen Christ Signed-off-by: Heiko Carstens Reviewed-by: Alexander Gordeev Reviewed-by: Juergen Christ Signed-off-by: Alexander Gordeev

s390/ap: Unmask SLCF bit in card and queue ap functions sysfs

2025-07-31T16:59:26+00:00

The SLCF bit ("stateless command filtering") introduced with CEX8 cards was because of the function mask's default value suppressed when user space read the ap function for an AP card or queue. Unmask this bit so that user space applications like lszcrypt can evaluate and list this feature. Fixes: d4c53ae8e494 ("s390/ap: store TAPQ hwinfo in struct ap_card") Signed-off-by: Harald Freudenberger Reviewed-by: Holger Dengler Signed-off-by: Heiko Carstens Signed-off-by: Alexander Gordeev

s390/chsc: use notifier for AP configuration changes

2024-04-09T15:29:55+00:00

The direct dependency of chsc and the AP bus prevents the modularization of ap bus. Introduce a notifier interface for AP changes, which decouples the producer of the change events (chsc) from the consumer (ap_bus). Remove the ap_cfg_chg() interface and replace it with the notifier invocation. The ap bus module registers a notification handler, which triggers the AP bus scan. Cc: Vineeth Vijayan Cc: Peter Oberparleiter Signed-off-by: Holger Dengler Reviewed-by: Harald Freudenberger Acked-by: Vineeth Vijayan Signed-off-by: Alexander Gordeev

s390/ap: use static qci information

2024-04-09T15:29:55+00:00

Since qci is available on most of the current machines, move away from the dynamic buffers for qci information and store it instead in a statically defined buffer. The new flags member in struct ap_config_info is now used as an indicator, if qci is available in the system (at least one of these bits is set). Suggested-by: Harald Freudenberger Signed-off-by: Holger Dengler Reviewed-by: Harald Freudenberger Signed-off-by: Alexander Gordeev

s390/ap: store TAPQ hwinfo in struct ap_card

2023-11-30T15:24:23+00:00

As of now the AP card struct held only part of the queue's hwinfo (that is the GR2 register content returned with an TAPQ invocation). This patch reworks struct ap_card to hold the whole hwinfo now. As there is a nice bit field union on top of this ap_tapq_hwinfo struct, all the ugly bit checkings can now get replaced by simple evaluations of the required bit field. Suggested-by: Ingo Franzki Signed-off-by: Harald Freudenberger Reviewed-by: Holger Dengler Signed-off-by: Alexander Gordeev

s390: fix various typos

2023-07-03T09:19:42+00:00

Fix various typos found with codespell. Signed-off-by: Heiko Carstens Signed-off-by: Alexander Gordeev

s390/ap: implement SE AP bind, unbind and associate

2023-03-20T10:12:49+00:00

Implementation of the new functions for SE AP support: bind, unbind and associate. There are two new sysfs attributes for this: /sys/devices/ap/cardxx/xx.yyyy/se_bind /sys/devices/ap/cardxx/xx.yyyy/se_associate Writing a 1 into the se_bind attribute triggers the SE AP bind for this AP queue, writing a 0 into does an unbind - that's a reset (RAPQ) with the F bit enabled. The se_associate attribute needs an integer value in range 0...2^16-1 written in. This is the index into a secrets table feed into the ultravisor. For more details please see the Architecture documents. These both new ap queue attributes are only visible inside a SE guest with SB (Secure Binding) available. Signed-off-by: Harald Freudenberger Reviewed-by: Holger Dengler Signed-off-by: Heiko Carstens

s390/ap: new low level inline functions ap_bapq() and ap_aapq()

2023-03-20T10:12:49+00:00

Introduce two new low level functions ap_bapq() (calls PQAP(BAPQ)) and ap_aapq (calls PQAP(AAPQ)). Both functions are only meant to be used in SE environment with the SE AP binding facility available. Signed-off-by: Harald Freudenberger Reviewed-by: Holger Dengler Signed-off-by: Heiko Carstens