diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2020-11-27 10:14:16 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-04 01:01:26 +1100 |
| commit | 48a8ab4eeb8271f2a0e2ca3cf80844a59acca153 (patch) | |
| tree | ec0ff290cbe68d27cdb8d46c4f489405fbf3db6f /arch/powerpc/kernel | |
| parent | edc541ecaae73d498a49b9ca82bc66255d9e0720 (diff) | |
powerpc/book3s64/pkeys: Don't update SPRN_AMR when in kernel mode.
Now that kernel correctly store/restore userspace AMR/IAMR values, avoid
manipulating AMR and IAMR from the kernel on behalf of userspace.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-15-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 6 |
2 files changed, 0 insertions, 10 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 0538e0f1790c..96bb10d00d9c 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -589,7 +589,6 @@ static void save_all(struct task_struct *tsk) __giveup_spe(tsk); msr_check_and_clear(msr_all_available); - thread_pkey_regs_save(&tsk->thread); } void flush_all_to_thread(struct task_struct *tsk) @@ -1160,8 +1159,6 @@ static inline void save_sprs(struct thread_struct *t) t->tar = mfspr(SPRN_TAR); } #endif - - thread_pkey_regs_save(t); } static inline void restore_sprs(struct thread_struct *old_thread, @@ -1202,7 +1199,6 @@ static inline void restore_sprs(struct thread_struct *old_thread, mtspr(SPRN_TIDR, new_thread->tidr); #endif - thread_pkey_regs_restore(new_thread, old_thread); } struct task_struct *__switch_to(struct task_struct *prev, diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 5b39baa61590..46419ae4d17e 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -347,12 +347,6 @@ static bool exception_common(int signr, struct pt_regs *regs, int code, current->thread.trap_nr = code; - /* - * Save all the pkey registers AMR/IAMR/UAMOR. Eg: Core dumps need - * to capture the content, if the task gets killed. - */ - thread_pkey_regs_save(¤t->thread); - return true; } |