From patchwork Tue Jan 10 04:28:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nathan Lynch X-Patchwork-Id: 1723799 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=lAf/dSvB; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4NrdB0053Kz23g2 for ; Tue, 10 Jan 2023 15:29:11 +1100 (AEDT) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4Nrd9y6pW3z3cJC for ; Tue, 10 Jan 2023 15:29:10 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=lAf/dSvB; dkim-atps=neutral X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=nathanl@linux.ibm.com; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256 header.s=pp1 header.b=lAf/dSvB; dkim-atps=neutral Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Nrd9Z57F4z3c8P for ; Tue, 10 Jan 2023 15:28:50 +1100 (AEDT) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30A2Tg4t007804 for ; Tue, 10 Jan 2023 04:28:47 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : subject : date : message-id : mime-version : content-transfer-encoding; s=pp1; bh=RYY0ZbDEM4N7VNpAhXymuznJ6ckaY1vQ4razg4P3Tw4=; b=lAf/dSvBnbx931qxVPcw75TfrmssEGi5eeUIu2bNhzAjFA/QP9cxSUPnEXKJXeGNkl5Q nRKqnR3P4sNG+yVLIXwFoDwKGhikSzHWYFagVICkvLZ0a1FGt25aCZnimmE27/NwVv62 Cm3uu3udd2tl7Mj/NwsJQbfofGjd9bIvrjEr6QmTsaGcFs7fMV+q1+oS2GFWwTtCGWnS GNbPN5oZogp7QwiNXsCYBBucxhTWOw760/ssqlRUTL+2pIjPjXjr0Mu0HGFd83mumjUL oNFRWhijHifDos75F00CxUCgmsNmigAL2n1UvxxvTeN/O9XDWuHWDj4Mg1KhY1Q6PdBn 3g== Received: from ppma04dal.us.ibm.com (7a.29.35a9.ip4.static.sl-reverse.com [169.53.41.122]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3myjw410yp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 10 Jan 2023 04:28:47 +0000 Received: from pps.filterd (ppma04dal.us.ibm.com [127.0.0.1]) by ppma04dal.us.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 30A3ei7s007709 for ; Tue, 10 Jan 2023 04:28:46 GMT Received: from smtprelay03.dal12v.mail.ibm.com ([9.208.130.98]) by ppma04dal.us.ibm.com (PPS) with ESMTPS id 3my0c7kjjt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 10 Jan 2023 04:28:46 +0000 Received: from smtpav06.dal12v.mail.ibm.com (smtpav06.dal12v.mail.ibm.com [10.241.53.105]) by smtprelay03.dal12v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 30A4SjaV11141740 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK) for ; Tue, 10 Jan 2023 04:28:45 GMT Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4A0A858061 for ; Tue, 10 Jan 2023 04:28:45 +0000 (GMT) Received: from smtpav06.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 35F7058060 for ; Tue, 10 Jan 2023 04:28:45 +0000 (GMT) Received: from localhost (unknown [9.163.4.210]) by smtpav06.dal12v.mail.ibm.com (Postfix) with ESMTP for ; Tue, 10 Jan 2023 04:28:45 +0000 (GMT) From: Nathan Lynch To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH] powerpc/pseries: drop RTAS-based timebase synchronization Date: Mon, 9 Jan 2023 22:28:45 -0600 Message-Id: <20230110042845.121792-1-nathanl@linux.ibm.com> X-Mailer: git-send-email 2.39.0 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: qT26BJz2dpNMMzY_xgdk0hkeoBJK2hHd X-Proofpoint-GUID: qT26BJz2dpNMMzY_xgdk0hkeoBJK2hHd X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2023-01-09_16,2023-01-09_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=870 phishscore=0 spamscore=0 clxscore=1015 impostorscore=0 suspectscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301100024 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The pseries platform has been LPAR-only for several generations, and the PAPR spec: * Guarantees that timebase synchronization is performed by the platform ("The timebase registers are synchronized by the platform before CPUs are given to the OS" - 7.3.8 SMP Support). * Completely omits the RTAS freeze-time-base and thaw-time-base RTAS functions, which are CHRP artifacts. This code is effectively unused on currently supported models, so drop it. Signed-off-by: Nathan Lynch --- arch/powerpc/platforms/pseries/smp.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c index fd2174edfa1d..2bcfee86ff87 100644 --- a/arch/powerpc/platforms/pseries/smp.c +++ b/arch/powerpc/platforms/pseries/smp.c @@ -278,11 +278,5 @@ void __init smp_init_pseries(void) cpumask_clear_cpu(boot_cpuid, of_spin_mask); } - /* Non-lpar has additional take/give timebase */ - if (rtas_token("freeze-time-base") != RTAS_UNKNOWN_SERVICE) { - smp_ops->give_timebase = rtas_give_timebase; - smp_ops->take_timebase = rtas_take_timebase; - } - pr_debug(" <- smp_init_pSeries()\n"); }