From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AIpwx49yaTsp1fy45SNh8FMlJ/ctOMfQYRJuF8e8BmuQUCT9rNIAeKz1veO4zR11j5KVfKDCbKmh ARC-Seal: i=1; a=rsa-sha256; t=1523931070; cv=none; d=google.com; s=arc-20160816; b=o0XYlUY6PhEqHNPj38/2ijT6Yt4ugady8yX8qkCSzPIBekxHTuMioHaNNXgN9wjf/o dqLmrpqFI59SuL/l59OB+RhVYvhHbxhh42tWvysQVsWTqB2Hk5UY2eduhdVOgDiuOVHf Pxh1IwBw+P4tFMMQsb+w2Og56vffg/rVyphRhLFGSrp55W6DV4h0YZHWsmDzRv26FbDo +h2LjKuo4itILz+KnDgp/iwZfB73TXGfoE4YczUEoFEuqxVoq8YACpCoZuk6EwyrFUtW Ya/lPa5Oa23sxU/s0nLmy2dBtvE5t1epJsuwD/01Au190tBWJEpeHvBwLa3nCH0PRTq0 OP/w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=message-id:date:subject:cc:to:from:arc-authentication-results; bh=+Gy6IeOQ95AB0ZwTTF2vCTVzQFiCchy7jLj2+VqsU28=; b=Z11kNTlUR7f3H43VnCcUBJgj+QjnypOvD8nprm6Rpt/9Fz/iTpWQp+X81zaJfaYNQI Vso5SHxMIIsloBoGycXdTVAoMRmhk1xQmxfjypLDKTSxwPYqVJ0izjATd745wRpBaG2Z armHThRpDHX57uHhAjMXno47wOrxEjVRS7QyVo5/gl+m8FYHCyHnHc8p7Nth3E1LHMrP eIeS0p8ugM1sOHDpmYum3YVdn8AyFQUj2HLCIXktbtnWDZci8EIew/O6MHZwggCibbkH 9ffy1h1CpAWMsiEIcZd4nQEva94p1KUkTBB7KhQN5WGzNKB0b7aY0of93A+kCG6s+qrT Pnqg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of alastair@au1.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=alastair@au1.ibm.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com Authentication-Results: mx.google.com; spf=pass (google.com: domain of alastair@au1.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=alastair@au1.ibm.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com 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 0/7] ocxl: Implement Power9 as_notify/wait for OpenCAPI Date: Tue, 17 Apr 2018 12:09:43 +1000 X-Mailer: git-send-email 2.14.3 X-TM-AS-GCONF: 00 x-cbid: 18041702-0040-0000-0000-0000042FBD4C X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18041702-0041-0000-0000-00002633C4B3 Message-Id: <20180417020950.21446-1-alastair@au1.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-04-17_01:,, 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-1804170020 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1597957545708610208?= X-GMAIL-MSGID: =?utf-8?q?1597957545708610208?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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. 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 p9 ocxl: Add an IOCTL so userspace knows which platform the kernel requires ocxl: Document new OCXL IOCTLs Documentation/accelerators/ocxl.rst | 10 ++++ 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 | 99 +---------------------------------- 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, 161 insertions(+), 104 deletions(-) -- 2.14.3 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 807147DE74 for ; Tue, 17 Apr 2018 02:11:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752250AbeDQCLK (ORCPT ); Mon, 16 Apr 2018 22:11:10 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:52958 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752145AbeDQCLK (ORCPT ); Mon, 16 Apr 2018 22:11:10 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w3H2914b074773 for ; Mon, 16 Apr 2018 22:11:09 -0400 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0a-001b2d01.pphosted.com with ESMTP id 2hd7q3gh74-1 (version=TLSv1.2 cipher=AES256-SHA256 bits=256 verify=NOT) for ; Mon, 16 Apr 2018 22:11:09 -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; Tue, 17 Apr 2018 03:11:03 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w3H2B2oC58196134; Tue, 17 Apr 2018 02:11:02 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6DE5DAE045; Tue, 17 Apr 2018 03:00:53 +0100 (BST) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 130E9AE04D; Tue, 17 Apr 2018 03:00:53 +0100 (BST) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 17 Apr 2018 03:00:53 +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 7C77CA01A7; Tue, 17 Apr 2018 12:11:00 +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 0/7] ocxl: Implement Power9 as_notify/wait for OpenCAPI Date: Tue, 17 Apr 2018 12:09:43 +1000 X-Mailer: git-send-email 2.14.3 X-TM-AS-GCONF: 00 x-cbid: 18041702-0040-0000-0000-0000042FBD4C X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18041702-0041-0000-0000-00002633C4B3 Message-Id: <20180417020950.21446-1-alastair@au1.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-04-17_01:,, 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-1804170020 Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@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. 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 p9 ocxl: Add an IOCTL so userspace knows which platform the kernel requires ocxl: Document new OCXL IOCTLs Documentation/accelerators/ocxl.rst | 10 ++++ 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 | 99 +---------------------------------- 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, 161 insertions(+), 104 deletions(-) -- 2.14.3 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html