Pull s390 updates from Martin Schwidefsky:
- Improved access control for the zcrypt driver, multiple device nodes
can now be created with different access control lists
- Extend the pkey API to provide random protected keys, this is useful
for encrypted swap device with ephemeral protected keys
- Add support for virtually mapped kernel stacks
- Rework the early boot code, this moves the memory detection into the
boot code that runs prior to decompression.
- Add KASAN support
- Bug fixes and cleanups
* tag 's390-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (83 commits)
s390/pkey: move pckmo subfunction available checks away from module init
s390/kasan: support preemptible kernel build
s390/pkey: Load pkey kernel module automatically
s390/perf: Return error when debug_register fails
s390/sthyi: Fix machine name validity indication
s390/zcrypt: fix broken zcrypt_send_cprb in-kernel api function
s390/vmalloc: fix VMALLOC_START calculation
s390/mem_detect: add missing include
s390/dumpstack: print psw mask and address again
s390/crypto: Enhance paes cipher to accept variable length key material
s390/pkey: Introduce new API for transforming key blobs
s390/pkey: Introduce new API for random protected key verification
s390/pkey: Add sysfs attributes to emit secure key blobs
s390/pkey: Add sysfs attributes to emit protected key blobs
s390/pkey: Define protected key blob format
s390/pkey: Introduce new API for random protected key generation
s390/zcrypt: add ap_adapter_mask sysfs attribute
s390/zcrypt: provide apfs failure code on type 86 error reply
s390/zcrypt: zcrypt device driver cleanup
s390/kasan: add support for mem= kernel parameter
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