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| author | Michael Mueller <mimu@linux.vnet.ibm.com> | 2013-07-02 22:58:26 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-07-16 12:21:56 +0200 |
| commit | 64597f9dae1850e0360ae2e9b5485d4b5d1fdf4c (patch) | |
| tree | d32a327697cccd38cfacdc86bdaf6ed6a4f3365e /arch/s390/include/asm | |
| parent | 47188d39b5deeebf41f87a02af1b3935866364cf (diff) | |
| download | op-kernel-dev-64597f9dae1850e0360ae2e9b5485d4b5d1fdf4c.zip op-kernel-dev-64597f9dae1850e0360ae2e9b5485d4b5d1fdf4c.tar.gz | |
s390/ptrace: PTRACE_TE_ABORT_RAND
The patch implements a s390 specific ptrace request
PTRACE_TE_ABORT_RAND to modify the randomness of spontaneous
aborts of memory transactions of the transaction execution
facility. The data argument of the ptrace request is used to
specify the levels of randomness, 0 for normal operation, 1 to
abort every transaction at a random instruction, and 2 to abort
a random transaction at a random instruction. The default is 0
for normal operation.
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 10 | ||||
| -rw-r--r-- | arch/s390/include/asm/switch_to.h | 4 |
2 files changed, 11 insertions, 3 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 6b49987..b0e6435 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -91,7 +91,15 @@ struct thread_struct { #endif }; -#define PER_FLAG_NO_TE 1UL /* Flag to disable transactions. */ +/* Flag to disable transactions. */ +#define PER_FLAG_NO_TE 1UL +/* Flag to enable random transaction aborts. */ +#define PER_FLAG_TE_ABORT_RAND 2UL +/* Flag to specify random transaction abort mode: + * - abort each transaction at a random instruction before TEND if set. + * - abort random transactions at a random instruction if cleared. + */ +#define PER_FLAG_TE_ABORT_RAND_TEND 4UL typedef struct thread_struct thread_struct; diff --git a/arch/s390/include/asm/switch_to.h b/arch/s390/include/asm/switch_to.h index f3a9e0f..80b6f11 100644 --- a/arch/s390/include/asm/switch_to.h +++ b/arch/s390/include/asm/switch_to.h @@ -10,7 +10,7 @@ #include <linux/thread_info.h> extern struct task_struct *__switch_to(void *, void *); -extern void update_per_regs(struct task_struct *task); +extern void update_cr_regs(struct task_struct *task); static inline void save_fp_regs(s390_fp_regs *fpregs) { @@ -86,7 +86,7 @@ static inline void restore_access_regs(unsigned int *acrs) restore_fp_regs(&next->thread.fp_regs); \ restore_access_regs(&next->thread.acrs[0]); \ restore_ri_cb(next->thread.ri_cb, prev->thread.ri_cb); \ - update_per_regs(next); \ + update_cr_regs(next); \ } \ prev = __switch_to(prev,next); \ } while (0) |
