diff options
| author |   Nicholas Piggin <npiggin@gmail.com> | 2020-07-03 11:19:58 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-07-22 00:01:25 +1000 |
| commit | 63396ada804c676e070bd1b8663046f18698ab27 (patch) | |
| tree | d6936337d63f8411c79ea4e65f73c5fee8761842 /arch | |
| parent | powerpc/64s: Remove PROT_SAO support (diff) | |
| download | linux-dev-63396ada804c676e070bd1b8663046f18698ab27.tar.xz linux-dev-63396ada804c676e070bd1b8663046f18698ab27.zip | |
powerpc/64s/hash: Disable subpage_prot syscall by default
The subpage_prot syscall was added for specialised system software
(Lx86) that has been discontinued for about 7 years, and is not thought
to be used elsewhere, so disable it by default.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200703011958.1166620-4-npiggin@gmail.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/Kconfig | 7 | ||||
| -rw-r--r-- | arch/powerpc/configs/powernv_defconfig | 1 | ||||
| -rw-r--r-- | arch/powerpc/configs/pseries_defconfig | 1 |
3 files changed, 5 insertions, 4 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 51abc59c3334..70adf69f8b1a 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -833,13 +833,16 @@ config FORCE_MAX_ZONEORDER this in mind when choosing a value for this option. config PPC_SUBPAGE_PROT - bool "Support setting protections for 4k subpages" + bool "Support setting protections for 4k subpages (subpage_prot syscall)" + default n depends on PPC_BOOK3S_64 && PPC_64K_PAGES help - This option adds support for a system call to allow user programs + This option adds support for system call to allow user programs to set access permissions (read/write, readonly, or no access) on the 4k subpages of each 64k page. + If unsure, say N here. + config PPC_COPRO_BASE bool diff --git a/arch/powerpc/configs/powernv_defconfig b/arch/powerpc/configs/powernv_defconfig index 2de9aadf0f50..afc0dd73a1e6 100644 --- a/arch/powerpc/configs/powernv_defconfig +++ b/arch/powerpc/configs/powernv_defconfig @@ -64,7 +64,6 @@ CONFIG_HWPOISON_INJECT=m CONFIG_TRANSPARENT_HUGEPAGE=y CONFIG_DEFERRED_STRUCT_PAGE_INIT=y CONFIG_PPC_64K_PAGES=y -CONFIG_PPC_SUBPAGE_PROT=y CONFIG_SCHED_SMT=y CONFIG_PM=y CONFIG_HOTPLUG_PCI=y diff --git a/arch/powerpc/configs/pseries_defconfig b/arch/powerpc/configs/pseries_defconfig index dfa4a726333b..894e8d85fb48 100644 --- a/arch/powerpc/configs/pseries_defconfig +++ b/arch/powerpc/configs/pseries_defconfig @@ -57,7 +57,6 @@ CONFIG_MEMORY_HOTREMOVE=y CONFIG_KSM=y CONFIG_TRANSPARENT_HUGEPAGE=y CONFIG_PPC_64K_PAGES=y -CONFIG_PPC_SUBPAGE_PROT=y CONFIG_SCHED_SMT=y CONFIG_HOTPLUG_PCI=y CONFIG_HOTPLUG_PCI_RPA=m |