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s390/tx: allow program interruption filtering in user space 

A user space program using the transactional execution facility
should be allowed to do program interrupt filtering. Do not set the
transactional-execution program-interruption-filtering override (PIFO)
bit in CR0.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2013-08-27 09:56:55 +02:00
parent 0196c642f7
commit 0628a5fbe1
1 changed files with 3 additions and 3 deletions
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6
arch/s390/kernel/ptrace.c
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@ -60,11 +60,11 @@ void update_cr_regs(struct task_struct *task)
__ctl_store(cr, 0, 2);
cr_new[1] = cr[1];
/* Set or clear transaction execution TXC/PIFO bits 8 and 9. */
/* Set or clear transaction execution TXC bit 8. */
if (task->thread.per_flags & PER_FLAG_NO_TE)
cr_new[0] = cr[0] & ~(3UL << 54);
cr_new[0] = cr[0] & ~(1UL << 55);
else
cr_new[0] = cr[0] | (3UL << 54);
cr_new[0] = cr[0] | (1UL << 55);
/* Set or clear transaction execution TDC bits 62 and 63. */
cr_new[2] = cr[2] & ~3UL;
if (task->thread.per_flags & PER_FLAG_TE_ABORT_RAND) {