From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753972AbbFOKt0 (ORCPT ); Mon, 15 Jun 2015 06:49:26 -0400 Received: from mail-bl2on0112.outbound.protection.outlook.com ([65.55.169.112]:47632 "EHLO na01-bl2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752083AbbFOKtR (ORCPT ); Mon, 15 Jun 2015 06:49:17 -0400 Authentication-Results: spf=none (sender IP is 165.204.84.222) smtp.mailfrom=amd.com; amacapital.net; dkim=none (message not signed) header.d=none; X-WSS-ID: 0NPZFE2-08-VZQ-02 X-M-MSG: From: Huang Rui To: Borislav Petkov , Andy Lutomirski , Thomas Gleixner , Peter Zijlstra , Ingo Molnar , "Rafael J. Wysocki" , "Len Brown" , John Stultz , =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Weisbecker?= CC: , , Fengguang Wu , Aaron Lu , Suravee Suthikulanit , Tony Li , Ken Xue , Huang Rui Subject: [PATCH v5 0/2] x86, mwaitt: introduce AMD mwaitt support Date: Mon, 15 Jun 2015 18:48:02 +0800 Message-ID: <1434365284-1495-1-git-send-email-ray.huang@amd.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-Microsoft-Exchange-Diagnostics: 1;BY2FFO11FD039;1:LcJAqSHtZHIaly1+TQEruVffAdfJux5cgRFoGUJ0jZVew9JY9iBbQIbtfjDTwFauTbbyyGE5nB3OUhxJTIgv0rKxWD9D0SiF9KReZw74HrfoVzykbfMX7DwueJ3NZIZSeCl8e7iQ9jjA+cCC5yRtDtdCkjm4xbWu4Z9wlBoMtJ3rrjLQ+ET/rZVok/KnYBO2KEsoJtgS1nzNkdRYs4M2FbVN1cmlsWEClH8+TprOHoXaN5uSmkdcCDQKFn/RYtBSfDO3PxKyn2MiTazI89lGgB5Y3hrs/sfARhUMsdubtPIXBi9NDeRB5fHQv/GASdxKYLtaXV+aEHY9Lk1koPTb5xgr197E2Akpm8xkCExtbkg= X-Forefront-Antispam-Report: CIP:165.204.84.222;CTRY:US;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10019020)(6009001)(428002)(209900001)(199003)(164054003)(189002)(19580395003)(50226001)(87936001)(50466002)(47776003)(77156002)(62966003)(86362001)(48376002)(36756003)(106466001)(5003600100002)(229853001)(105586002)(33646002)(15395725005)(53416004)(189998001)(46102003)(92566002)(77096005)(15975445007)(50986999)(5001770100001)(101416001)(6606295002);DIR:OUT;SFP:1102;SCL:1;SRVR:BLUPR02MB1105;H:atltwp02.amd.com;FPR:;SPF:None;MLV:sfv;A:1;MX:1;LANG:en; X-Microsoft-Exchange-Diagnostics: 1;BLUPR02MB1105;2:K3ZR9R55FkC1KlhMQMjhKRy5VTNm0qvhu8UpgWQqiWyWgumCWk+ay+IOoXTbnjLE;2:E2V+npC0s7xa6F952pJMSjcqYSUesQddT8dDPDCM+nnRdUp8mCB/5+ZHq/OCBc2sYgLLQ747kikC/z1DQRfzT1IkFvgEho/dUvIZ5uJUN1voW0gF+UDw22t6iESupUsm5bt8K0uJI2zfr7ybpYX/Zy9ZIW/KXJzNRPa1HzE6eBS5RmNAOW4eSGLZoJfXLo+QNcSLJgA5icKGsVj0M5/wShsjnsAtkH0vpuTSbZvwm3JgfeYihe9FSOltFnL/Xxyg;6:sAva/Qp7Rg2qxwDL3pd6+jcMtFqpivTCQRaaALf/3dxicdaN1x/yPj+JxuGrdw61ISmpJu3eTpk3h0rDqCKT7u3Ze07+NhkWDJDGV3xYFt+Gy97PI0OL4IezHEpFw7pNel+KZa/1s2VCNXlwR8Y8oj9xBwTJ55hvbeNgi1lYtWVwv3MLfKV/hMNKCSKsBZ1pNXF5+4OGgz06cUfmVtAM29OPl7SqsET5Atc+2BWq8kwuDdWJghorpqawAa3qmcimIbSyqjZNJYvFZqMxUcieDk9hdOgB140sUE6HJYtUFRcBPlSJyGC0Jo4fFS35DzkNT806Du/9EZ/PZaczDpulTjvVOqXenYyknHyJqPode+DWiBTpasZrumZmTUTOeR5Sgk6uRWOPSnn6fLixc6TgNCMauJRrsW2VwjnvU47+gpKfre8IDZnGcdk+p2zRCeTvmmTaPIldKio4B2bszTNehHkdOhG01L9WfglfsdyvZBjE3GOY8n3DRf274NK7ghS6 X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:BLUPR02MB1105; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:(601004)(520003)(5005006)(3002001);SRVR:BLUPR02MB1105;BCL:0;PCL:0;RULEID:;SRVR:BLUPR02MB1105; X-Microsoft-Exchange-Diagnostics: 1;BLUPR02MB1105;3:rJdxr18ea7iYHjMXjdAuwDc5LQa+Bn0YyQqBlxi0SqbCXaPCcw74hIZi/YUYsXbEeZPE5wH8B0w5LG/c55z7P1Wu97OjYpdmR/YwKb047msahfHpzIsCXD23flFKs/FZZF0P1plaMYanR/fGQoODfp3Dxng5yCG+7edV0oimK4yvoNn/6/gWkc2QA5/Ho3bbLxXmjUrO3VMSoODTkmTbU2ielNpIZKfmtcF+t31BjnwMwv1UtIMFO+mI5o74fBn0Ybveo7J7KtEWaOO31kCl6gFEoNjIjx7LFA7BjZj7CC+ogBQzJUB0VYiPxP35hTkk X-Forefront-PRVS: 0608DEDB67 X-Microsoft-Exchange-Diagnostics: 1;BLUPR02MB1105;9: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 X-Microsoft-Exchange-Diagnostics: 1;BLUPR02MB1105;3:TDEnkPjKT6HeWfr3xVZ4h8WpCYTmQ2tuGL7U8NdLGReiWbzIUtr9fEIjils2PxXOjcOZZDDApbTY0R2ZOYwlPe0i6IHLwEkFciPpnq/mHyGRsPZ7AmsfDXYNGbJ7NTIcDMBvTZO0jlRDkuRYzTT/Sg==;10:Bw7hvbhbDzBHZzXGffNdKnN53B7G7eSne1wuTKdA6gzfXAtLfG7Rhuqk8NrBTMnyyZhavE3Ry3FSKjqKg2CAMnt7iHZjujuZ4zLwOYqjDDQ=;6:R+j+NXNvFEqCdPXny4kR1pRXxMObYdZG2UQp+uUeheOzsGkfOnJUQrmo9LO07lRF X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Jun 2015 10:49:14.5210 (UTC) X-MS-Exchange-CrossTenant-Id: fde4dada-be84-483f-92cc-e026cbee8e96 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=fde4dada-be84-483f-92cc-e026cbee8e96;Ip=[165.204.84.222];Helo=[atltwp02.amd.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLUPR02MB1105 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, This patch set introduces a new instruction support on AMD Carrizo (Family 15h, Model 60h-6fh). It adds mwaitx delay function with a configurable timer. Andy and Boris provide a suggestion which use mwaitx on delay method. Some discussions of the background, please see: http://marc.info/?l=linux-kernel&m=143202042530498&w=2 http://marc.info/?l=linux-kernel&m=143161327003541&w=2 http://marc.info/?l=linux-kernel&m=143222815331016&w=2 They are rebased on tip/master. Changes from v1 -> v2 - Remove mwaitx idle implementation since some disputes without power improvement. - Add a patch which implement another use case on delay. - Introduce a kernel parameter (delay) to make delay method configurable. Changes from v2 -> v3 - Add compared data on commit message - Remove kernel parameter - Add hint to avoid to access deep state in future - Update mwaitx delay method as Petter's suggestion Changes from v3 -> v4 - Put the MONITORX/MWAITX description into comments Changes from v4 -> v5 - Remove mwaitx function - Use mwaitx_delay at init_amd - Use cpu_tts as montioring address scope I already do some testing with mwaitx on udelay. Test scenario: glb_loops = usec_to_tsc(delay_usec) rdtsc -> read TSC counters as start mwaitx_delay(glb_loops) rdtsc -> read TSC counters as end diff = end - start Compared the real TSC counts (diff), that means the loops of counter goes. And glb_loops is the input value of the EBX, that is the expect loops which user configures. Below is 10000 us of mwaitx delay, we could see about 1200 (diff - glb_loops) delayed with mwaitx. [ 2369.008651] start=4401974718758, end=4401992576888, diff=17858130, glb_loops=17856939 Thanks, Rui Huang Rui (2): x86, mwaitt: add monitorx and mwaitx instruction x86, mwaitt: introduce mwaix delay with a configurable timer arch/x86/include/asm/cpufeature.h | 1 + arch/x86/include/asm/delay.h | 1 + arch/x86/include/asm/mwait.h | 43 +++++++++++++++++++++++++++++++++++++ arch/x86/kernel/cpu/amd.c | 4 ++++ arch/x86/lib/delay.c | 45 +++++++++++++++++++++++++++++++++++++++ 5 files changed, 94 insertions(+) -- 1.9.1