From 0628a5fbe1b5af35ef5346443ff1056e257a7350 Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Tue, 27 Aug 2013 09:56:55 +0200
Subject: [PATCH] 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>
---
arch/s390/kernel/ptrace.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 2bc08039140f..9556905bd3ce 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -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) {
--
2.30.9