Commit e7615c92 authored by Heiko Carstens's avatar Heiko Carstens Committed by Vasily Gorbik

s390: enable ARCH_HAS_MEMBARRIER_SYNC_CORE

s390 trivially supports the ARCH_HAS_MEMBARRIER_SYNC_CORE requirements
since the used lpswe(y) instruction to return from any kernel context to
user space performs CPU serialization. This is very similar to arm, arm64
and powerpc.

See commit 70216e18 ("membarrier: Provide core serializing command,
*_SYNC_CORE") for further details.
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent af90d7b6
...@@ -5,7 +5,7 @@ ...@@ -5,7 +5,7 @@
# #
# Architecture requirements # Architecture requirements
# #
# * arm/arm64/powerpc # * arm/arm64/powerpc/s390
# #
# Rely on implicit context synchronization as a result of exception return # Rely on implicit context synchronization as a result of exception return
# when returning from IPI handler, and when returning to user-space. # when returning from IPI handler, and when returning to user-space.
...@@ -45,7 +45,7 @@ ...@@ -45,7 +45,7 @@
| parisc: | TODO | | parisc: | TODO |
| powerpc: | ok | | powerpc: | ok |
| riscv: | TODO | | riscv: | TODO |
| s390: | TODO | | s390: | ok |
| sh: | TODO | | sh: | TODO |
| sparc: | TODO | | sparc: | TODO |
| um: | TODO | | um: | TODO |
......
...@@ -76,6 +76,7 @@ config S390 ...@@ -76,6 +76,7 @@ config S390
select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_GIGANTIC_PAGE select ARCH_HAS_GIGANTIC_PAGE
select ARCH_HAS_KCOV select ARCH_HAS_KCOV
select ARCH_HAS_MEMBARRIER_SYNC_CORE
select ARCH_HAS_MEM_ENCRYPT select ARCH_HAS_MEM_ENCRYPT
select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_PTE_SPECIAL
......
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