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| author | Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> | 2017-11-08 03:23:53 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-11-11 23:03:09 +0100 |
| commit | ec233ede4c8654894610ea54f4dae7adc954ac62 (patch) | |
| tree | 40cbfb0b0a7e804ba0b9dacae55af50bac12de5b /arch/powerpc/include | |
| parent | powerpc/vas: Export HVWC to debugfs (diff) | |
| download | linux-ec233ede4c8654894610ea54f4dae7adc954ac62.tar.xz linux-ec233ede4c8654894610ea54f4dae7adc954ac62.zip | |
powerpc: Add support for setting SPRN_TIDR
We need the SPRN_TIDR to be set for use with fast thread-wakeup (core-
to-core wakeup) and also with CAPI.
Each thread in a process needs to have a unique id within the process.
But for now, we assign globally unique thread ids to all threads in
the system.
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Philippe Bergheaud <felix@linux.vnet.ibm.com>
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
[mpe: Simplify tidr clearing on fork() and ctx switch code]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/processor.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/switch_to.h | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index fab7ff877304..58cc21274423 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -329,6 +329,7 @@ struct thread_struct { */ int dscr_inherit; unsigned long ppr; /* used to save/restore SMT priority */ + unsigned long tidr; #endif #ifdef CONFIG_PPC_BOOK3S_64 unsigned long tar; diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h index 17c8380673a6..f5da32f43fed 100644 --- a/arch/powerpc/include/asm/switch_to.h +++ b/arch/powerpc/include/asm/switch_to.h @@ -91,4 +91,7 @@ static inline void clear_task_ebb(struct task_struct *t) #endif } +extern int set_thread_tidr(struct task_struct *t); +extern void clear_thread_tidr(struct task_struct *t); + #endif /* _ASM_POWERPC_SWITCH_TO_H */ |