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Message-ID: <20170323142734.38b03846@canb.auug.org.au>
Date: Thu, 23 Mar 2017 14:27:34 +1100
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Jiri Kosina <jikos@...nel.org>,
Martin Schwidefsky <schwidefsky@...ibm.com>,
Heiko Carstens <heiko.carstens@...ibm.com>
Cc: linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
Miroslav Benes <mbenes@...e.cz>,
Josh Poimboeuf <jpoimboe@...hat.com>
Subject: linux-next: manual merge of the livepatching tree with the s390
tree
Hi all,
Today's linux-next merge of the livepatching tree got conflicts in:
arch/s390/include/asm/thread_info.h
arch/s390/kernel/entry.S
between commit:
916cda1aa1b4 ("s390: add a system call for guarded storage")
from the s390 tree and commits:
30d64f1904d4 ("livepatch/s390: reorganize TIF thread flag bits")
2f09ca60a56d ("livepatch/s390: add TIF_PATCH_PENDING thread flag")
from the livepatching tree.
I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging. You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.
--
Cheers,
Stephen Rothwell
diff --cc arch/s390/include/asm/thread_info.h
index f36e6e2b73f0,646845edf148..000000000000
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@@ -55,11 -56,8 +56,9 @@@ int arch_dup_task_struct(struct task_st
#define TIF_SIGPENDING 1 /* signal pending */
#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
#define TIF_UPROBE 3 /* breakpointed or single-stepping */
-#define TIF_PATCH_PENDING 4 /* pending live patching update */
+#define TIF_GUARDED_STORAGE 4 /* load guarded storage control block */
- #define TIF_SYSCALL_TRACE 8 /* syscall trace active */
- #define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
- #define TIF_SECCOMP 10 /* secure computing */
- #define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
++#define TIF_PATCH_PENDING 5 /* pending live patching update */
+
#define TIF_31BIT 16 /* 32bit process */
#define TIF_MEMDIE 17 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 18 /* restore signal mask in do_signal() */
@@@ -70,6 -74,12 +75,13 @@@
#define _TIF_NOTIFY_RESUME _BITUL(TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING _BITUL(TIF_SIGPENDING)
#define _TIF_NEED_RESCHED _BITUL(TIF_NEED_RESCHED)
+ #define _TIF_UPROBE _BITUL(TIF_UPROBE)
++#define _TIF_GUARDED_STORAGE _BITUL(TIF_GUARDED_STORAGE)
+ #define _TIF_PATCH_PENDING _BITUL(TIF_PATCH_PENDING)
+
+ #define _TIF_31BIT _BITUL(TIF_31BIT)
+ #define _TIF_SINGLE_STEP _BITUL(TIF_SINGLE_STEP)
+
#define _TIF_SYSCALL_TRACE _BITUL(TIF_SYSCALL_TRACE)
#define _TIF_SYSCALL_AUDIT _BITUL(TIF_SYSCALL_AUDIT)
#define _TIF_SECCOMP _BITUL(TIF_SECCOMP)
diff --cc arch/s390/kernel/entry.S
index fa8b8f28e08b,a08b5eea5567..000000000000
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@@ -47,7 -47,7 +47,7 @@@ STACK_SIZE = 1 << STACK_SHIF
STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
_TIF_WORK = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
- _TIF_UPROBE | _TIF_GUARDED_STORAGE)
- _TIF_UPROBE | _TIF_PATCH_PENDING)
++ _TIF_UPROBE | _TIF_GUARDED_STORAGE | _TIF_PATCH_PENDING)
_TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \
_TIF_SYSCALL_TRACEPOINT)
_CIF_WORK = (_CIF_MCCK_PENDING | _CIF_ASCE_PRIMARY | \
@@@ -332,10 -332,13 +332,15 @@@ ENTRY(system_call
TSTMSK __TI_flags(%r12),_TIF_UPROBE
jo .Lsysc_uprobe_notify
#endif
+ TSTMSK __TI_flags(%r12),_TIF_GUARDED_STORAGE
+ jo .Lsysc_guarded_storage
TSTMSK __PT_FLAGS(%r11),_PIF_PER_TRAP
jo .Lsysc_singlestep
+ #ifdef CONFIG_LIVEPATCH
+ TSTMSK __TI_flags(%r12),_TIF_PATCH_PENDING
+ jo .Lsysc_patch_pending # handle live patching just before
+ # signals and possible syscall restart
+ #endif
TSTMSK __TI_flags(%r12),_TIF_SIGPENDING
jo .Lsysc_sigpending
TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME
@@@ -411,13 -414,15 +416,22 @@@
#endif
#
+# _TIF_GUARDED_STORAGE is set, call guarded_storage_load
+#
+.Lsysc_guarded_storage:
+ lgr %r2,%r11 # pass pointer to pt_regs
+ larl %r14,.Lsysc_return
+ jg gs_load_bc_cb
+
+ # _TIF_PATCH_PENDING is set, call klp_update_patch_state
+ #
+ #ifdef CONFIG_LIVEPATCH
+ .Lsysc_patch_pending:
+ lg %r2,__LC_CURRENT # pass pointer to task struct
+ larl %r14,.Lsysc_return
+ jg klp_update_patch_state
+ #endif
+
#
# _PIF_PER_TRAP is set, call do_per_trap
#
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