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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-04-18 16:51:19 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-04-21 23:05:56 +1000 |
| commit | 0fb1c25ab523614b056ace11be67aac8f8ccabb1 (patch) | |
| tree | 0f458e2ca41b6e94626f1d7bc41c4557e42a44ec /arch/powerpc/mm/init-common.c | |
| parent | 69795cabe4cfe5122438d50010ad5310c113a013 (diff) | |
| download | linux-0fb1c25ab523614b056ace11be67aac8f8ccabb1.tar.gz linux-0fb1c25ab523614b056ace11be67aac8f8ccabb1.tar.bz2 linux-0fb1c25ab523614b056ace11be67aac8f8ccabb1.zip | |
powerpc: Add skeleton for Kernel Userspace Execution Prevention
This patch adds a skeleton for Kernel Userspace Execution Prevention.
Then subarches implementing it have to define CONFIG_PPC_HAVE_KUEP
and provide setup_kuep() function.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Don't split strings, use pr_crit_ratelimited()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/init-common.c')
| -rw-r--r-- | arch/powerpc/mm/init-common.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c index 36d28e872289..83f95a5565d6 100644 --- a/arch/powerpc/mm/init-common.c +++ b/arch/powerpc/mm/init-common.c @@ -26,8 +26,19 @@ #include <asm/pgtable.h> #include <asm/kup.h> +static bool disable_kuep = !IS_ENABLED(CONFIG_PPC_KUEP); + +static int __init parse_nosmep(char *p) +{ + disable_kuep = true; + pr_warn("Disabling Kernel Userspace Execution Prevention\n"); + return 0; +} +early_param("nosmep", parse_nosmep); + void __init setup_kup(void) { + setup_kuep(disable_kuep); } #define CTOR(shift) static void ctor_##shift(void *addr) \ |