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Diffstat (limited to 'arch/s390/kernel/entry64.S')
-rw-r--r--arch/s390/kernel/entry64.S24
1 files changed, 22 insertions, 2 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index e09dbe5f2901..5963e43618bb 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -43,9 +43,9 @@ STACK_SIZE = 1 << STACK_SHIFT
STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_MCCK_PENDING | _TIF_PER_TRAP )
+ _TIF_MCCK_PENDING | _TIF_PER_TRAP | _TIF_ASCE)
_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_MCCK_PENDING)
+ _TIF_MCCK_PENDING | _TIF_ASCE)
_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
_TIF_SYSCALL_TRACEPOINT)
_TIF_TRANSFER = (_TIF_MCCK_PENDING | _TIF_TLB_WAIT)
@@ -275,6 +275,8 @@ sysc_work:
jo sysc_sigpending
tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
jo sysc_notify_resume
+ tm __TI_flags+7(%r12),_TIF_ASCE
+ jo sysc_uaccess
j sysc_return # beware of critical section cleanup
#
@@ -292,6 +294,14 @@ sysc_mcck_pending:
jg s390_handle_mcck # TIF bit will be cleared by handler
#
+# _TIF_ASCE is set, load user space asce
+#
+sysc_uaccess:
+ ni __TI_flags+7(%r12),255-_TIF_ASCE
+ lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
+ j sysc_return
+
+#
# _TIF_SIGPENDING is set, call do_signal
#
sysc_sigpending:
@@ -559,6 +569,8 @@ io_work_tif:
jo io_sigpending
tm __TI_flags+7(%r12),_TIF_NOTIFY_RESUME
jo io_notify_resume
+ tm __TI_flags+7(%r12),_TIF_ASCE
+ jo io_uaccess
j io_return # beware of critical section cleanup
#
@@ -571,6 +583,14 @@ io_mcck_pending:
j io_return
#
+# _TIF_ASCE is set, load user space asce
+#
+io_uaccess:
+ ni __TI_flags+7(%r12),255-_TIF_ASCE
+ lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
+ j io_return
+
+#
# _TIF_NEED_RESCHED is set, call schedule
#
io_reschedule: