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