diff options
| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2019-04-18 16:51:18 +1000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-04-21 23:05:54 +1000 |
| commit | 69795cabe4cfe5122438d50010ad5310c113a013 (patch) | |
| tree | 1a6f463d544b6ce25276c05558123d3614a7b6db /arch/powerpc/include/asm/kup.h | |
| parent | powerpc/powernv/idle: Restore AMR/UAMOR/AMOR after idle (diff) | |
| download | linux-dev-69795cabe4cfe5122438d50010ad5310c113a013.tar.xz linux-dev-69795cabe4cfe5122438d50010ad5310c113a013.zip | |
powerpc: Add framework for Kernel Userspace Protection
This patch adds a skeleton for Kernel Userspace Protection
functionnalities like Kernel Userspace Access Protection and Kernel
Userspace Execution Prevention
The subsequent implementation of KUAP for radix makes use of a MMU
feature in order to patch out assembly when KUAP is disabled or
unsupported. This won't work unless there's an entry point for KUP
support before the feature magic happens, so for PPC64 setup_kup() is
called early in setup.
On PPC32, feature_fixup() is done too early to allow the same.
Suggested-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/kup.h')
| -rw-r--r-- | arch/powerpc/include/asm/kup.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kup.h b/arch/powerpc/include/asm/kup.h new file mode 100644 index 000000000000..7a88b8b9b54d --- /dev/null +++ b/arch/powerpc/include/asm/kup.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_KUP_H_ +#define _ASM_POWERPC_KUP_H_ + +#ifndef __ASSEMBLY__ + +void setup_kup(void); + +#endif /* !__ASSEMBLY__ */ + +#endif /* _ASM_POWERPC_KUP_H_ */ |