Message ID | 20180511061303.10728-1-alastair@au1.ibm.com (mailing list archive) |
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Headers | show
Return-Path: <linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org> X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 40j0QD1H8cz9s15 for <patchwork-incoming@ozlabs.org>; Fri, 11 May 2018 16:23:00 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=au1.ibm.com Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 40j0QC6sVwzF2Fk for <patchwork-incoming@ozlabs.org>; Fri, 11 May 2018 16:22:59 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=au1.ibm.com X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=au1.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=alastair@au1.ibm.com; receiver=<UNKNOWN>) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=au1.ibm.com 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 40j0F32PnJzF155 for <linuxppc-dev@lists.ozlabs.org>; Fri, 11 May 2018 16:15:03 +1000 (AEST) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w4B69CvA011435 for <linuxppc-dev@lists.ozlabs.org>; Fri, 11 May 2018 02:15:00 -0400 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0b-001b2d01.pphosted.com with ESMTP id 2hw1uggh3a-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for <linuxppc-dev@lists.ozlabs.org>; Fri, 11 May 2018 02:15:00 -0400 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 11 May 2018 07:14:54 +0100 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w4B6ErfT7012772; Fri, 11 May 2018 06:14:53 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C94E0A4051; Fri, 11 May 2018 07:06:30 +0100 (BST) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 740FEA4055; Fri, 11 May 2018 07:06:30 +0100 (BST) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 11 May 2018 07:06:30 +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 B1A0EA02C7; Fri, 11 May 2018 16:14:51 +1000 (AEST) From: "Alastair D'Silva" <alastair@au1.ibm.com> To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v5 0/7] ocxl: Implement Power9 as_notify/wait for OpenCAPI Date: Fri, 11 May 2018 16:12:56 +1000 X-Mailer: git-send-email 2.17.0 X-TM-AS-GCONF: 00 x-cbid: 18051106-0040-0000-0000-0000043872C3 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18051106-0041-0000-0000-0000263CB9C9 Message-Id: <20180511061303.10728-1-alastair@au1.ibm.com> Content-Type: text/plain Content-Transfer-Encoding: 8bit MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-05-11_03:, , 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=1011 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805110057 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org> List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>, <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe> List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev/> List-Post: <mailto:linuxppc-dev@lists.ozlabs.org> List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help> List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>, <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe> Cc: mikey@neuling.org, arnd@arndb.de, linux-doc@vger.kernel.org, malat@debian.org, gregkh@linuxfoundation.org, corbet@lwn.net, vaibhav@linux.vnet.ibm.com, npiggin@gmail.com, linux-kernel@vger.kernel.org, fbarrat@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, andrew.donnellan@au1.ibm.com, pombredanne@nexb.com, felix@linux.vnet.ibm.com, sukadev@linux.vnet.ibm.com, Alastair D'Silva <alastair@d-silva.org> Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" <linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org> |
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ocxl: Implement Power9 as_notify/wait for OpenCAPI
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From: Alastair D'Silva <alastair@d-silva.org> 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: v5: Remove stray brace Fix bad rename of ocxl_ioctl_platform to ocxl_ioctl_features v4: Remove the "unique" statement from the set_thread_tidr function and move the text explaining why it is safe from the commit message to the function description 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(-)