From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AB8JxZqp7GlSemmTbX0vquipvstK0bz4hx3xRvGUWMTGvVyjSqf4SszSr/kjPCVF4qLYsQRmeFpp ARC-Seal: i=1; a=rsa-sha256; t=1525844154; cv=none; d=google.com; s=arc-20160816; b=tnoJhhbaMv1ouRrj3FwAZmz2qrMsYn9c3uBKFwNTK8u+OXyz9cqI2zM9Io2NCR1cgh Md7pOeUTxBMQHmZ2ajfGmn6B4v6QpxWC3V6tjWKGfKIj7pPYtjXpb5dF09F2UrtNuevM PqE6jYdlmZ3l0jZRn3mSlR/1RDSri0bg4YcYXvEsSc7S7glcZbXr7V8W7Y2XuF8lRstb KxMPkkKlwyPiDzhQzXT/rzcuqxMoxIi5kRzg1g+psKI6CmugCIbIZ6yURSbOYl/QBqR3 4TH/hkvZnPkhM0f5rqnp6g7PVerPCYS/XuincIg2kXR4z4S5Kj6n2YFenjbNzbkaQbnW zANg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:content-transfer-encoding:message-id:references :in-reply-to:date:subject:cc:to:from:arc-authentication-results; bh=O7TOKUVQ6KvLAGfaN0o+5wH+bszKw1r8J7zgtEmTQnU=; b=WEW/wFBZQuda/MSz3Y6VTN/fSk2DIxQkr4WPNMzsGGGjRQ+IClfXKizg8L4k8dZxmj ZKIf0hM4sdHPiddqYPK6hSt2MLKaX/FOg7FQYAYz3Y82t9Lu0e/orSWu4K1DLDIRmSRG E8mDxIWf28oU2s+1+L3ee4bs2+zIGKwk2dqvY1eqM5NknxWaX43NIrVwdW8PfZ/sLagX 8+AbCENH+KX+329rG2lt6pM4yIZSeslB+OKpQaedRUjiRu1i1oj+/SP5MDfMYdCThumg 0KYZrlPJNwo0sAjwbSRVSv1eiKFSUvJFRUdTLTa8YHcs9J+pUSb2wKUfaeFUKJb/Tonr gUnQ== 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 v4 0/7] ocxl: Implement Power9 as_notify/wait for OpenCAPI Date: Wed, 9 May 2018 15:34:59 +1000 X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180509004212.4506-1-alastair@au1.ibm.com> References: <20180509004212.4506-1-alastair@au1.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18050905-0040-0000-0000-0000045791A3 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18050905-0041-0000-0000-000020FB9AD6 Message-Id: <20180509053506.9754-1-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=2018-05-09_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=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1805090056 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1597957545708610208?= X-GMAIL-MSGID: =?utf-8?q?1599963559533061775?= 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. Changelog: 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(-) -- 2.14.3