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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-04-18 16:51:20 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-04-21 23:05:57 +1000 |
| commit | de78a9c42a790011f179bc94a7da3f5d8721f4cc (patch) | |
| tree | 462ebea30f53f5f1e61513cbae38e40145ec030a /arch/powerpc/platforms/Kconfig.cputype | |
| parent | 0fb1c25ab523614b056ace11be67aac8f8ccabb1 (diff) | |
| download | linux-de78a9c42a790011f179bc94a7da3f5d8721f4cc.tar.bz2 | |
powerpc: Add a framework for Kernel Userspace Access Protection
This patch implements a framework for Kernel Userspace Access
Protection.
Then subarches will have the possibility to provide their own
implementation by providing setup_kuap() and
allow/prevent_user_access().
Some platforms will need to know the area accessed and whether it is
accessed from read, write or both. Therefore source, destination and
size and handed over to the two functions.
mpe: Rename to allow/prevent rather than unlock/lock, and add
read/write wrappers. Drop the 32-bit code for now until we have an
implementation for it. Add kuap to pt_regs for 64-bit as well as
32-bit. Don't split strings, use pr_crit_ratelimited().
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/Kconfig.cputype')
| -rw-r--r-- | arch/powerpc/platforms/Kconfig.cputype | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 7d30bbbaa3c1..457fc3a5ed93 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -357,6 +357,18 @@ config PPC_KUEP If you're unsure, say Y. +config PPC_HAVE_KUAP + bool + +config PPC_KUAP + bool "Kernel Userspace Access Protection" + depends on PPC_HAVE_KUAP + default y + help + Enable support for Kernel Userspace Access Protection (KUAP) + + If you're unsure, say Y. + config ARCH_ENABLE_HUGEPAGE_MIGRATION def_bool y depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION |