From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C12BC7EE31 for ; Mon, 22 May 2023 14:19:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233628AbjEVOT5 (ORCPT ); Mon, 22 May 2023 10:19:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47918 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233697AbjEVOTz (ORCPT ); Mon, 22 May 2023 10:19:55 -0400 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CBD4DF9; Mon, 22 May 2023 07:19:51 -0700 (PDT) Received: from pps.filterd (m0353724.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34MEFPol018220; Mon, 22 May 2023 14:18:53 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=pp1; bh=z2ZSDd89AXbLMt+6T7YsO2fdF0Yi8CPnR5yZ/lkSqSY=; b=b6NU5OeCXax+WrVwHJKBxU/2eP96sPFh/BlyPWwACQ/7wUWy6YKEjXCQw9pGRd6Hq9u6 MLWn9B4REgKuxAwXLXxVoiQ/caTY+5b2VJYARsH2GLmnE/WF+75uxVAMsycMBbGGbTN0 WdlESeBK8OJxuulsQRedH+dgpSmBwtogMv1YWS89315e3uleicCPE65liI3FCc0CRUsp IMoEoP6IguzCWOKm9MeOaeUZ0trUtnp3AJqz9TIT2AQ7wc2ARtMGjMJ+GvNpVqnqflEm 38hJ8QrXOMCAwnMAHMotE71twb0+4R7u+wbmNBqvd9/1givEuwWgmivHIjEM5kOfo1wL Yg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3qr8y9au0p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 22 May 2023 14:18:53 +0000 Received: from m0353724.ppops.net (m0353724.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 34MEFUDT018701; Mon, 22 May 2023 14:18:52 GMT Received: from ppma03fra.de.ibm.com (6b.4a.5195.ip4.static.sl-reverse.com [149.81.74.107]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3qr8y9atyc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 22 May 2023 14:18:52 +0000 Received: from pps.filterd (ppma03fra.de.ibm.com [127.0.0.1]) by ppma03fra.de.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 34M812dN006123; Mon, 22 May 2023 14:18:49 GMT Received: from smtprelay06.fra02v.mail.ibm.com ([9.218.2.230]) by ppma03fra.de.ibm.com (PPS) with ESMTPS id 3qppe08ty6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 22 May 2023 14:18:49 +0000 Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay06.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 34MEIj8V35258654 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 22 May 2023 14:18:45 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C7DAC2004B; Mon, 22 May 2023 14:18:45 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2169620040; Mon, 22 May 2023 14:18:43 +0000 (GMT) Received: from osiris (unknown [9.171.20.176]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTPS; Mon, 22 May 2023 14:18:43 +0000 (GMT) Date: Mon, 22 May 2023 16:18:41 +0200 From: Heiko Carstens To: Peter Zijlstra Cc: bigeasy@linutronix.de, mark.rutland@arm.com, maz@kernel.org, catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, kernel@xen0n.name, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, pbonzini@redhat.com, wanpengli@tencent.com, vkuznets@redhat.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, jgross@suse.com, boris.ostrovsky@oracle.com, daniel.lezcano@linaro.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, rafael@kernel.org, longman@redhat.com, boqun.feng@gmail.com, pmladek@suse.com, senozhatsky@chromium.org, rostedt@goodmis.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, jstultz@google.com, sboyd@kernel.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-s390@vger.kernel.org, kvm@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-pm@vger.kernel.org Subject: Re: [PATCH v2 06/13] s390/time: Provide sched_clock_noinstr() Message-ID: References: <20230519102058.581557770@infradead.org> <20230519102715.570170436@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230519102715.570170436@infradead.org> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 8u38vrNKBwlno1xrZVRe_usY_SDPYYwI X-Proofpoint-GUID: -02WeZ8d1wkDcrhX0-M0Ma7vvv7DyGGi X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-05-22_10,2023-05-22_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 malwarescore=0 suspectscore=0 adultscore=0 priorityscore=1501 bulkscore=0 impostorscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 mlxlogscore=643 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305220117 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org On Fri, May 19, 2023 at 12:21:04PM +0200, Peter Zijlstra wrote: > With the intent to provide local_clock_noinstr(), a variant of > local_clock() that's safe to be called from noinstr code (with the > assumption that any such code will already be non-preemptible), > prepare for things by providing a noinstr sched_clock_noinstr() > function. > > Specifically, preempt_enable_*() calls out to schedule(), which upsets > noinstr validation efforts. > > Signed-off-by: Peter Zijlstra (Intel) > --- > arch/s390/include/asm/timex.h | 13 +++++++++---- > arch/s390/kernel/time.c | 11 ++++++++++- > 2 files changed, 19 insertions(+), 5 deletions(-) Acked-by: Heiko Carstens