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linux/arch/s390
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Harald Freudenberger 7bbe449d0b s390/paes: Reestablish retry loop in paes 
With commit ed6776c96c ("s390/crypto: remove retry
loop with sleep from PAES pkey invocation") the retry
loop to retry derivation of a protected key from a
secure key has been removed. This was based on the
assumption that theses retries are not needed any
more as proper retries are done in the zcrypt layer.

However, tests have revealed that there exist some
cases with master key change in the HSM and immediately
(< 1 second) attempt to derive a protected key from a
secure key with exact this HSM may eventually fail.

The low level functions in zcrypt_ccamisc.c and
zcrypt_ep11misc.c detect and report this temporary
failure and report it to the caller as -EBUSY. The
re-established retry loop in the paes implementation
catches exactly this -EBUSY and eventually may run
some retries.

Fixes: ed6776c96c ("s390/crypto: remove retry loop with sleep from PAES pkey invocation")
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
2024-05-01 11:52:54 +02:00
..
appldata S390: Remove now superfluous sentinel elem from ctl_table arrays 2023-10-10 15:22:02 -07:00
boot - Sumanth Korikkar has taught s390 to allocate hotplug-time page frames 2024-03-14 17:43:30 -07:00
configs s390/mm: provide simple ARCH_HAS_DEBUG_VIRTUAL support 2024-03-13 09:23:49 +01:00
crypto s390/paes: Reestablish retry loop in paes 2024-05-01 11:52:54 +02:00
hypfs s390/hypfs_sprp: remove unneeded DMA zone allocation 2024-02-09 13:58:14 +01:00
include s390/vdso: Add CFI for RA register to asm macro vdso_func 2024-04-26 16:22:38 +02:00
kernel s390/vdso: Add CFI for RA register to asm macro vdso_func 2024-04-26 16:22:38 +02:00
kvm S390: 2024-03-15 13:03:13 -07:00
lib s390/checksum: provide csum_partial_copy_nocheck() 2024-02-16 14:30:17 +01:00
mm s390/mm: Fix clearing storage keys for huge pages 2024-04-22 12:47:47 +02:00
net s390/bpf: Fix bpf_plt pointer arithmetic 2024-03-19 22:52:43 -07:00
pci s390 updates for 6.9 merge window 2024-03-12 10:14:22 -07:00
purgatory
tools s390/tools: handle rela R_390_GOTPCDBL/R_390_GOTOFF64 2024-03-07 17:02:05 +01:00
Kbuild - An extensive rework of kexec and crash Kconfig from Eric DeVolder 2023-08-29 14:53:51 -07:00
Kconfig more s390 updates for 6.9 merge window 2024-03-19 11:38:27 -07:00
Kconfig.debug
Makefile s390/mm: provide simple ARCH_HAS_DEBUG_VIRTUAL support 2024-03-13 09:23:49 +01:00