diff options
| author | Christophe Leroy | 2021-10-19 09:29:13 +0200 |
|---|---|---|
| committer | Michael Ellerman | 2021-12-09 22:41:17 +1100 |
| commit | 13dac4e31e75ce10b2fcaad4432a24dae6c955f6 (patch) | |
| tree | 9fa4157708c5765962619f71fce6f866dfd68abd /arch/powerpc/mm | |
| parent | 6c1fa60d368e6b752e1612eae9bb0970e85392b2 (diff) | |
powerpc/8xx: Activate KUEP at all time
On the 8xx, there is absolutely no runtime impact with KUEP. Protection
against execution of user code in kernel mode is set up at boot time
by configuring the groups with contain all user pages as having swapped
protection rights, in extenso EX for user and NA for supervisor.
Configure KUEP at startup and force selection of CONFIG_PPC_KUEP.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2129e86944323ffe9ed07fffbeafdfd2e363690a.1634627931.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/nohash/8xx.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/powerpc/mm/nohash/8xx.c b/arch/powerpc/mm/nohash/8xx.c index baa1f8a40af8..e878e8124ee6 100644 --- a/arch/powerpc/mm/nohash/8xx.c +++ b/arch/powerpc/mm/nohash/8xx.c @@ -215,12 +215,7 @@ void __init setup_initial_memory_limit(phys_addr_t first_memblock_base, #ifdef CONFIG_PPC_KUEP void setup_kuep(bool disabled) { - if (disabled) - return; - pr_info("Activating Kernel Userspace Execution Prevention\n"); - - mtspr(SPRN_MI_AP, MI_APG_KUEP); } #endif |