Merge tag 's390-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

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
  ...

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index a8c4ce07fc9d..caa98a7fe392 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -73,6 +73,17 @@ config ZCRYPT
 	  + Crypto Express 2,3,4 or 5 Accelerator (CEXxA)
 	  + Crypto Express 4 or 5 EP11 Coprocessor (CEXxP)
 
+config ZCRYPT_MULTIDEVNODES
+	bool "Support for multiple zcrypt device nodes"
+	default y
+	depends on S390
+	depends on ZCRYPT
+	help
+	  With this option enabled the zcrypt device driver can
+	  provide multiple devices nodes in /dev. Each device
+	  node can get customized to limit access and narrow
+	  down the use of the available crypto hardware.
+
 config PKEY
 	tristate "Kernel API for protected key handling"
 	depends on S390