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The group notifier that handles the VFIO_GROUP_NOTIFY_SET_KVM event must
use the required locks in proper locking order to dynamically update the
guest's APCB. The proper locking order is:
1. matrix_dev->guests_lock: required to use the KVM pointer to
update a KVM guest's APCB.
2. matrix_mdev->kvm->lock: required to update a KVM guest's APCB.
3. matrix_dev->mdevs_lock: required to store or access the data
stored in a struct ap_matrix_mdev instance.
Two macros are introduced to acquire and release the locks in the proper
order. These macros are now used by the group notifier functions.
Signed-off-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
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| .. | ||
| ap_bus.c | ||
| ap_bus.h | ||
| ap_card.c | ||
| ap_debug.h | ||
| ap_queue.c | ||
| Makefile | ||
| pkey_api.c | ||
| vfio_ap_debug.h | ||
| vfio_ap_drv.c | ||
| vfio_ap_ops.c | ||
| vfio_ap_private.h | ||
| zcrypt_api.c | ||
| zcrypt_api.h | ||
| zcrypt_card.c | ||
| zcrypt_cca_key.h | ||
| zcrypt_ccamisc.c | ||
| zcrypt_ccamisc.h | ||
| zcrypt_cex2a.c | ||
| zcrypt_cex2a.h | ||
| zcrypt_cex2c.c | ||
| zcrypt_cex2c.h | ||
| zcrypt_cex4.c | ||
| zcrypt_cex4.h | ||
| zcrypt_debug.h | ||
| zcrypt_ep11misc.c | ||
| zcrypt_ep11misc.h | ||
| zcrypt_error.h | ||
| zcrypt_msgtype6.c | ||
| zcrypt_msgtype6.h | ||
| zcrypt_msgtype50.c | ||
| zcrypt_msgtype50.h | ||
| zcrypt_queue.c | ||