linux-stable/drivers/s390/crypto
Pierre Morel ec89b55e3b s390: ap: implement PAPQ AQIC interception in kernel
We register a AP PQAP instruction hook during the open
of the mediated device. And unregister it on release.

During the probe of the AP device, we allocate a vfio_ap_queue
structure to keep track of the information we need for the
PQAP/AQIC instruction interception.

In the AP PQAP instruction hook, if we receive a demand to
enable IRQs,
- we retrieve the vfio_ap_queue based on the APQN we receive
  in REG1,
- we retrieve the page of the guest address, (NIB), from
  register REG2
- we retrieve the mediated device to use the VFIO pinning
  infrastructure to pin the page of the guest address,
- we retrieve the pointer to KVM to register the guest ISC
  and retrieve the host ISC
- finaly we activate GISA

If we receive a demand to disable IRQs,
- we deactivate GISA
- unregister from the GIB
- unpin the NIB

When removing the AP device from the driver the device is
reseted and this process unregisters the GISA from the GIB,
and unpins the NIB address then we free the vfio_ap_queue
structure.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Acked-by: Tony Krowiak <akrowiak@linux.ibm.com>
Acked-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2019-07-02 16:00:28 +02:00
..
ap_bus.c s390/zcrypt: Fix wrong dispatching for control domain CPRBs 2019-05-28 14:49:38 +02:00
ap_bus.h s390/zcrypt: Fix wrong dispatching for control domain CPRBs 2019-05-28 14:49:38 +02:00
ap_card.c s390/zcrypt: code beautify 2018-08-20 16:02:11 +02:00
ap_debug.h s390/zcrypt: Make ap init functions static. 2018-04-10 07:39:01 +02:00
ap_queue.c s390/zcrypt: fix possible deadlock situation on ap queue remove 2019-04-10 17:46:24 +02:00
Makefile KVM updates for v4.20 2018-10-25 17:57:35 -07:00
pkey_api.c s390/pkey: Use -ENODEV instead of -EOPNOTSUPP 2019-06-15 12:24:36 +02:00
vfio_ap_drv.c s390: ap: implement PAPQ AQIC interception in kernel 2019-07-02 16:00:28 +02:00
vfio_ap_ops.c s390: ap: implement PAPQ AQIC interception in kernel 2019-07-02 16:00:28 +02:00
vfio_ap_private.h s390: ap: implement PAPQ AQIC interception in kernel 2019-07-02 16:00:28 +02:00
zcrypt_api.c s390/zcrypt: Fix wrong dispatching for control domain CPRBs 2019-05-28 14:49:38 +02:00
zcrypt_api.h s390/zcrypt: zcrypt device driver cleanup 2018-10-09 11:21:35 +02:00
zcrypt_card.c s390/zcrypt: zcrypt device driver cleanup 2018-10-09 11:21:35 +02:00
zcrypt_cca_key.h s390/zcrypt: zcrypt device driver cleanup 2018-10-09 11:21:35 +02:00
zcrypt_cex2a.c s390/zcrypt: reinit ap queue state machine during device probe 2018-11-27 10:43:35 +01:00
zcrypt_cex2a.h s390/zcrypt: zcrypt device driver cleanup 2018-10-09 11:21:35 +02:00
zcrypt_cex2c.c s390/zcrypt: reinit ap queue state machine during device probe 2018-11-27 10:43:35 +01:00
zcrypt_cex2c.h s390/zcrypt: zcrypt device driver cleanup 2018-10-09 11:21:35 +02:00
zcrypt_cex4.c s390/zcrypt: reinit ap queue state machine during device probe 2018-11-27 10:43:35 +01:00
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 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
zcrypt_error.h s390/zcrypt: improve special ap message cmd handling 2018-11-30 07:22:05 +01:00
zcrypt_msgtype6.c s390/zcrypt: support special flagged EP11 cprbs 2019-06-07 10:09:55 +02:00
zcrypt_msgtype6.h s390/zcrypt: zcrypt device driver cleanup 2018-10-09 11:21:35 +02:00
zcrypt_msgtype50.c s390/zcrypt: zcrypt device driver cleanup 2018-10-09 11:21:35 +02:00
zcrypt_msgtype50.h s390/zcrypt: zcrypt device driver cleanup 2018-10-09 11:21:35 +02:00
zcrypt_queue.c s390/zcrypt: zcrypt device driver cleanup 2018-10-09 11:21:35 +02:00