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| author | Heiko Carstens <hca@linux.ibm.com> | 2023-03-17 10:31:40 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2023-03-27 17:19:52 +0200 |
| commit | e7615c9225d7c7562d1cd95ba8cc2cbf38c3d29e (patch) | |
| tree | 1139568d37aa4e2815ea4e7ea5d7cd5ceab46cc5 | |
| parent | af90d7b69c69b9b8ab91acc2ceab3706a2798373 (diff) | |
| download | linux-stable-e7615c9225d7c7562d1cd95ba8cc2cbf38c3d29e.tar.gz linux-stable-e7615c9225d7c7562d1cd95ba8cc2cbf38c3d29e.tar.bz2 linux-stable-e7615c9225d7c7562d1cd95ba8cc2cbf38c3d29e.zip | |
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 70216e18e519 ("membarrier: Provide core serializing command,
*_SYNC_CORE") for further details.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
| -rw-r--r-- | Documentation/features/sched/membarrier-sync-core/arch-support.txt | 4 | ||||
| -rw-r--r-- | arch/s390/Kconfig | 1 |
2 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/features/sched/membarrier-sync-core/arch-support.txt b/Documentation/features/sched/membarrier-sync-core/arch-support.txt index 1e51614c136e..23260ca44946 100644 --- a/Documentation/features/sched/membarrier-sync-core/arch-support.txt +++ b/Documentation/features/sched/membarrier-sync-core/arch-support.txt @@ -5,7 +5,7 @@ # # Architecture requirements # -# * arm/arm64/powerpc +# * arm/arm64/powerpc/s390 # # Rely on implicit context synchronization as a result of exception return # when returning from IPI handler, and when returning to user-space. @@ -45,7 +45,7 @@ | parisc: | TODO | | powerpc: | ok | | riscv: | TODO | - | s390: | TODO | + | s390: | ok | | sh: | TODO | | sparc: | TODO | | um: | TODO | diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 8f1c6da2ae4d..d610f911677e 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -76,6 +76,7 @@ config S390 select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_GIGANTIC_PAGE select ARCH_HAS_KCOV + select ARCH_HAS_MEMBARRIER_SYNC_CORE select ARCH_HAS_MEM_ENCRYPT select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS select ARCH_HAS_PTE_SPECIAL |