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linux/drivers/s390/crypto
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Harald Freudenberger 3317785a88 s390/ap: Fix wrong APQN fill calculation 
The upper limit of the firmware queue fill state for each APQN
is reported by the hwinfo.qd field. This field shows the
numbers 0-7 for 1-8 queue spaces available. But the exploiting
code assumed the real boundary is stored there and thus stoppes
queuing in messages one tick too early.

Correct the limit calculation and thus offer a boost
of 12.5% performance for high traffic on one APQN.

Fixes: d4c53ae8e4 ("s390/ap: store TAPQ hwinfo in struct ap_card")
Cc: stable@vger.kernel.org
Reported-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
History 2026-01-20 14:33:42 +01:00
..
ap_bus.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
ap_bus.h s390/ap: Restrict driver_override versus apmask and aqmask use 2025-11-24 11:43:06 +01:00
ap_card.c s390/ap: Fix wrong APQN fill calculation 2026-01-20 14:33:42 +01:00
ap_debug.h s390/zcrypt: introduce dynamic debugging for AP and zcrypt code 2024-02-16 14:30:12 +01:00
ap_queue.c s390/ap: Fix wrong APQN fill calculation 2026-01-20 14:33:42 +01:00
Makefile s390/pkey: Add new pkey handler module pkey-uv 2024-10-29 11:17:18 +01:00
pkey_api.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
pkey_base.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
pkey_base.h s390/pkey: Provide and pass xflags within pkey and zcrypt layers 2025-04-30 11:34:03 +02:00
pkey_cca.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
pkey_ep11.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
pkey_pckmo.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
pkey_sysfs.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
pkey_uv.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
vfio_ap_debug.h s390-vfio-ap: introduces s390 kernel debug feature for vfio_ap device driver 2022-02-06 23:31:29 +01:00
vfio_ap_drv.c s390/vfio-ap: Driver feature advertisement 2024-09-23 17:57:04 +02:00
vfio_ap_ops.c s390/ap: Rename mutex ap_perms_mutex to ap_attr_mutex 2025-11-24 11:43:06 +01:00
vfio_ap_private.h s390/vfio-ap: Signal eventfd when guest AP configuration is changed 2025-02-18 18:53:48 +01:00
zcrypt_api.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
zcrypt_api.h s390/zcrypt: Rework zcrypt function zcrypt_device_status_mask_ext 2025-04-30 11:34:01 +02:00
zcrypt_card.c s390: Remove compat support 2025-11-17 11:10:38 +01:00
zcrypt_cca_key.h s390/zcrypt: rework arrays with length zero occurrences 2023-04-19 16:47:31 +02:00
zcrypt_ccamisc.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
zcrypt_ccamisc.h s390/pkey: Provide and pass xflags within pkey and zcrypt layers 2025-04-30 11:34:03 +02:00
zcrypt_cex2a.c s390/zcrypt: remove CEX2 and CEX3 device drivers 2023-07-24 12:12:22 +02:00
zcrypt_cex2a.h s390/zcrypt: remove CEX2 and CEX3 device drivers 2023-07-24 12:12:22 +02:00
zcrypt_cex2c.c s390/zcrypt: remove CEX2 and CEX3 device drivers 2023-07-24 12:12:22 +02:00
zcrypt_cex2c.h s390/zcrypt: remove CEX2 and CEX3 device drivers 2023-07-24 12:12:22 +02:00
zcrypt_cex4.c s390/zcrypt: Rework ep11 misc functions to use cprb mempool 2025-04-30 11:34:02 +02:00
zcrypt_cex4.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
zcrypt_debug.h s390/zcrypt: introduce dynamic debugging for AP and zcrypt code 2024-02-16 14:30:12 +01:00
zcrypt_ep11misc.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
zcrypt_ep11misc.h s390/pkey: Provide and pass xflags within pkey and zcrypt layers 2025-04-30 11:34:03 +02:00
zcrypt_error.h s390/zcrypt: improve zcrypt retry behavior 2024-03-07 14:41:15 +01:00
zcrypt_msgtype6.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
zcrypt_msgtype6.h s390/zcrypt: code cleanup 2022-04-25 13:54:14 +02:00
zcrypt_msgtype50.c s390: Remove KMSG_COMPONENT macro 2025-11-24 11:45:21 +01:00
zcrypt_msgtype50.h s390/zcrypt: remove CEX2 and CEX3 device drivers 2023-07-24 12:12:22 +02:00
zcrypt_queue.c s390: Remove compat support 2025-11-17 11:10:38 +01:00