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s390/ptrace: PTRACE_TE_ABORT_RAND

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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>
This commit is contained in:
Michael Mueller
2013-07-02 22:58:26 +02:00
committed by Martin Schwidefsky
parent 47188d39b5
commit 64597f9dae
4 changed files with 51 additions and 14 deletions
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10
arch/s390/include/asm/processor.h
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@@ -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;