| Message ID | 20200529054141.156384-2-aneesh.kumar@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [RFC,1/2] libnvdimm: Add prctl control for disabling synchronous fault support. | expand |
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 27a81c291be8..f8694838ad4e 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -383,6 +383,15 @@ config PPC_KUEP If you're unsure, say Y. +config ARCH_MAP_SYNC_DISABLE + bool "Disable synchronous fault support (MAP_SYNC)" + default y + help + Disable support for synchronous fault with nvdimm namespaces. + + If you're unsure, say Y. + + config PPC_HAVE_KUAP bool
This adds a kernel config option that controls whether MAP_SYNC is enabled by default. With POWER10, architecture is adding new pmem flush and sync instructions. The kernel should prevent the usage of MAP_SYNC if applications are not using the new instructions on newer hardware. This config allows user to control whether MAP_SYNC should be enabled by default or not. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> --- arch/powerpc/platforms/Kconfig.cputype | 9 +++++++++ 1 file changed, 9 insertions(+)