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Commit 0628a5fb authored by Martin Schwidefsky's avatar Martin Schwidefsky
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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: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 0196c642

arch/s390/kernel/ptrace.c

+3 −3
Original line number Diff line number Diff line
@@ -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) {