From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38228 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726889AbgKAS6w (ORCPT ); Sun, 1 Nov 2020 13:58:52 -0500 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D3A38C0617A6 for ; Sun, 1 Nov 2020 10:58:50 -0800 (PST) Received: by mail-pf1-x441.google.com with SMTP id e7so9068888pfn.12 for ; Sun, 01 Nov 2020 10:58:50 -0800 (PST) Subject: Re: [PATCH] s390: add support for TIF_NOTIFY_SIGNAL References: <251a204d-9362-82b7-e5d9-14c55feb2df2@kernel.dk> <20201101173153.GC9375@osiris> From: Jens Axboe Message-ID: <0fe8c058-657f-020d-4920-66eb628eba2f@kernel.dk> Date: Sun, 1 Nov 2020 11:58:47 -0700 MIME-Version: 1.0 In-Reply-To: <20201101173153.GC9375@osiris> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit List-ID: To: Heiko Carstens Cc: linux-s390@vger.kernel.org On 11/1/20 10:31 AM, Heiko Carstens wrote: > On Thu, Oct 29, 2020 at 10:21:11AM -0600, Jens Axboe wrote: >> Wire up TIF_NOTIFY_SIGNAL handling for s390. >> >> Cc: linux-s390@vger.kernel.org >> Signed-off-by: Jens Axboe >> --- >> >> 5.11 has support queued up for TIF_NOTIFY_SIGNAL, see this posting >> for details: >> >> https://lore.kernel.org/io-uring/20201026203230.386348-1-axboe@kernel.dk/ >> >> As part of that work, I'm adding TIF_NOTIFY_SIGNAL support to all archs, >> as that will enable a set of cleanups once all of them support it. I'm >> happy carrying this patch if need be, or it can be funelled through the >> arch tree. Let me know. >> >> arch/s390/include/asm/thread_info.h | 2 ++ >> arch/s390/kernel/entry.S | 7 ++++++- >> 2 files changed, 8 insertions(+), 1 deletion(-) >> >> diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h >> index 13a04fcf7762..0045341ade48 100644 >> --- a/arch/s390/include/asm/thread_info.h >> +++ b/arch/s390/include/asm/thread_info.h >> @@ -65,6 +65,7 @@ void arch_setup_new_exec(void); >> #define TIF_GUARDED_STORAGE 4 /* load guarded storage control block */ >> #define TIF_PATCH_PENDING 5 /* pending live patching update */ >> #define TIF_PGSTE 6 /* New mm's will use 4K page tables */ >> +#define TIF_NOTIFY_SIGNAL 7 /* signal notifications exist */ >> #define TIF_ISOLATE_BP 8 /* Run process with isolated BP */ >> #define TIF_ISOLATE_BP_GUEST 9 /* Run KVM guests with isolated BP */ >> >> @@ -82,6 +83,7 @@ void arch_setup_new_exec(void); >> #define TIF_SYSCALL_TRACEPOINT 27 /* syscall tracepoint instrumentation */ >> >> #define _TIF_NOTIFY_RESUME BIT(TIF_NOTIFY_RESUME) >> +#define _TIF_NOTIFY_SIGNAL BIT(TIF_NOTIFY_SIGNAL) >> #define _TIF_SIGPENDING BIT(TIF_SIGPENDING) >> #define _TIF_NEED_RESCHED BIT(TIF_NEED_RESCHED) >> #define _TIF_UPROBE BIT(TIF_UPROBE) >> diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S >> index 86235919c2d1..a30d891e8045 100644 >> --- a/arch/s390/kernel/entry.S >> +++ b/arch/s390/kernel/entry.S >> @@ -52,7 +52,8 @@ STACK_SIZE = 1 << STACK_SHIFT >> 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_PATCH_PENDING) >> + _TIF_UPROBE | _TIF_GUARDED_STORAGE | _TIF_PATCH_PENDING | \ >> + _TIF_NOTIFY_SIGNAL) >> _TIF_TRACE = (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP | \ >> _TIF_SYSCALL_TRACEPOINT) >> _CIF_WORK = (_CIF_ASCE_PRIMARY | _CIF_ASCE_SECONDARY | _CIF_FPU) >> @@ -463,6 +464,8 @@ ENTRY(system_call) >> #endif >> TSTMSK __PT_FLAGS(%r11),_PIF_SYSCALL_RESTART >> jo .Lsysc_syscall_restart >> + TSTMSK __TI_flags(%r12),_TIF_NOTIFY_SIGNAL >> + jo .Lsysc_sigpending >> TSTMSK __TI_flags(%r12),_TIF_SIGPENDING >> jo .Lsysc_sigpending >> TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME >> @@ -857,6 +860,8 @@ ENTRY(io_int_handler) >> #endif >> TSTMSK __TI_flags(%r12),_TIF_SIGPENDING >> jo .Lio_sigpending >> + TSTMSK __TI_flags(%r12),_TIF_NOTIFY_SIGNAL >> + jo .Lio_sigpending >> TSTMSK __TI_flags(%r12),_TIF_NOTIFY_RESUME >> jo .Lio_notify_resume >> TSTMSK __TI_flags(%r12),_TIF_GUARDED_STORAGE > > (full quote so you can make sense of the patch below). > > Please merge the patch below into this one. With that: Thanks Heiko, I merged that in, does look better. And I've added your acked-by. -- Jens Axboe