Received: by 10.192.165.148 with SMTP id m20csp4927440imm; Tue, 8 May 2018 17:46:08 -0700 (PDT) X-Google-Smtp-Source: AB8JxZrnPO0G2NtZQaR49vpdBjn2cisQgZSH5aQkdZ7Zb4iYrzjpaHDgfbda9HjLuZgHxgRxNaCx X-Received: by 2002:a63:63c5:: with SMTP id x188-v6mr2248280pgb.302.1525826768038; Tue, 08 May 2018 17:46:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1525826768; cv=none; d=google.com; s=arc-20160816; b=LGeq1lrvGPXHSSaT/FsFVhav3mq/H2uhBgUb5MTSqoSRedFRjKYZi8Y9MQRkrknIdN EjoL/NAFklmVrFDfj8kyV4+Y+FAlLE4u/AInAz6j0Uk9JcbvYfUVk1GS7/MJZBWY2ZtZ LxFRNN/Disq/EqylgIC7u6lXliYeEsfw3xOvGeKtbCAm+eCE78EVEQd/1T08+ARzJEAO RSM7JQ1wSRmgyBxM6osRI2I0aO8+efwiI9tnp5Gsi5jbHpr7S73yBgxJXxipvA2wy+OT be4BLNKvABsNobKASFNfEYccfimigvQoDF8+Wl09kaTLh0YVbr2c4EW9eFbYSEoeOIIl CMmA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:content-transfer-encoding :message-id:references:in-reply-to:date:subject:cc:to:from :arc-authentication-results; bh=f7fbOE35WPQlCdtZOnoK7TqNlxZRqPtqoPYiAa9aEbU=; b=h73OPfeEL5eTjfYgph2+p459GIGfmEeZ0+mSo6CF8LLXw8ZMZobrqmNRqzlkLpl+JT PYef7nmFTiLMJrU6UBWP7O/0YhFyMyiWmbUnl6j7YUzQoZkRBzPBiJxGlvi1uNSLuDix 3rb8XV+gOetOGTq6hA0ieWpvh3GxWxDT1Dn7E+ukAq63uFSTG2BsISYfc6JvFLLxgd6J 6vD5N7UNvsFOWvGesdSFoOO3cOQJwSPrJZ4I8y9WqsimySgHQB1LlhDcirSmMSl/gS7f KVxu59xYSwwzhRMPkNaZzkN6TCn6yzyqFJRjmwBEJ0KTM+4AS5q6bL/hN1ljkEkoBxgZ fyhQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id v64-v6si7472865pgv.528.2018.05.08.17.45.53; Tue, 08 May 2018 17:46:07 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933606AbeEIAo7 (ORCPT + 99 others); Tue, 8 May 2018 20:44:59 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:54234 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933492AbeEIAnO (ORCPT ); Tue, 8 May 2018 20:43:14 -0400 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w490da5v000994 for ; Tue, 8 May 2018 20:43:13 -0400 Received: from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com [195.75.94.109]) by mx0a-001b2d01.pphosted.com with ESMTP id 2huk490d3j-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 08 May 2018 20:43:13 -0400 Received: from localhost by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 9 May 2018 01:43:11 +0100 Received: from b06cxnps4075.portsmouth.uk.ibm.com (9.149.109.197) by e06smtp13.uk.ibm.com (192.168.101.143) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Wed, 9 May 2018 01:43:05 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w490h5ia2949576; Wed, 9 May 2018 00:43:05 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 15A564C05E; Wed, 9 May 2018 01:35:06 +0100 (BST) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B83DB4C050; Wed, 9 May 2018 01:35:05 +0100 (BST) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 9 May 2018 01:35:05 +0100 (BST) Received: from adsilva.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 48BBEA026B; Wed, 9 May 2018 10:43:03 +1000 (AEST) From: "Alastair D'Silva" To: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, mikey@neuling.org, vaibhav@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, malat@debian.org, felix@linux.vnet.ibm.com, pombredanne@nexb.com, sukadev@linux.vnet.ibm.com, npiggin@gmail.com, gregkh@linuxfoundation.org, arnd@arndb.de, andrew.donnellan@au1.ibm.com, fbarrat@linux.vnet.ibm.com, corbet@lwn.net, "Alastair D'Silva" Subject: [PATCH v3 0/7] ocxl: Implement Power9 as_notify/wait for OpenCAPI Date: Wed, 9 May 2018 10:42:05 +1000 X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180417020950.21446-1-alastair@au1.ibm.com> References: <20180417020950.21446-1-alastair@au1.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18050900-0012-0000-0000-000005D42CD1 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050900-0013-0000-0000-000019513FE0 Message-Id: <20180509004212.4506-1-alastair@au1.ibm.com> Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-05-08_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805090005 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Alastair D'Silva The Power 9 as_notify/wait feature provides a lower latency way to signal a thread that work is complete. This series enables the use of this feature from OpenCAPI adapters, as well as addressing a potential starvation issue when allocating thread IDs. Changelog: v3: Fix references to POWER9 Remove stray whitespace edit from docs Add more details to commit message for "use task_pid_nr()" Retitle patch 6 to indicate OCXL rather than CPU features v2: Rename get_platform IOCTL to get_features Move stray edit from patch 1 to patch 3 Alastair D'Silva (7): powerpc: Add TIDR CPU feature for POWER9 powerpc: Use TIDR CPU feature to control TIDR allocation powerpc: use task_pid_nr() for TID allocation ocxl: Rename pnv_ocxl_spa_remove_pe to clarify it's action ocxl: Expose the thread_id needed for wait on POWER9 ocxl: Add an IOCTL so userspace knows what OCXL features are available ocxl: Document new OCXL IOCTLs Documentation/accelerators/ocxl.rst | 11 ++++ arch/powerpc/include/asm/cputable.h | 3 +- arch/powerpc/include/asm/pnv-ocxl.h | 2 +- arch/powerpc/include/asm/switch_to.h | 1 - arch/powerpc/kernel/dt_cpu_ftrs.c | 1 + arch/powerpc/kernel/process.c | 101 +--------------------------------- arch/powerpc/platforms/powernv/ocxl.c | 4 +- drivers/misc/ocxl/context.c | 5 +- drivers/misc/ocxl/file.c | 78 ++++++++++++++++++++++++++ drivers/misc/ocxl/link.c | 38 ++++++++++++- drivers/misc/ocxl/ocxl_internal.h | 1 + include/misc/ocxl.h | 9 +++ include/uapi/misc/ocxl.h | 14 +++++ 13 files changed, 163 insertions(+), 105 deletions(-) -- 2.14.3