From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp09.au.ibm.com (e23smtp09.au.ibm.com [202.81.31.142]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id EC76E1A0008 for ; Fri, 15 May 2015 20:42:38 +1000 (AEST) Received: from /spool/local by e23smtp09.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 15 May 2015 20:42:37 +1000 Received: from d23relay10.au.ibm.com (d23relay10.au.ibm.com [9.190.26.77]) by d23dlp01.au.ibm.com (Postfix) with ESMTP id 0B48B2CE8054 for ; Fri, 15 May 2015 20:42:33 +1000 (EST) Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay10.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t4FAgO6J35848410 for ; Fri, 15 May 2015 20:42:32 +1000 Received: from d23av03.au.ibm.com (localhost [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t4FAfxCp025434 for ; Fri, 15 May 2015 20:42:00 +1000 From: Vipin K Parashar To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v4] powerpc/powernv: Poweroff (EPOW, DPO) events support for PowerNV platform Date: Fri, 15 May 2015 16:11:34 +0530 Message-Id: <1431686495-14910-1-git-send-email-vipin@linux.vnet.ibm.com> Cc: stewart@linux.vnet.ibm.com, Vipin K Parashar , joel@jms.id.au List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This patch adds support for FSP EPOW (Early Power Off Warning) and DPO (Delayed Power Off) events for PowerNV platform. EPOW events are generated by SPCN/FSP due to various critical system conditions that need system shutdown. Few examples of these conditions are high ambient temperature or system running on UPS power with low UPS battery. DPO event is generated in response to admin initiated system shutdown request. Upon receipt of EPOW and DPO events host kernel invokes orderly_poweroff for performing graceful system shutdown. System admin can also add systemd service shutdown scripts to perform any specific actions like graceful guest shutdown upon system poweroff. libvirt-guests is systemd service available on recent distros for management of guests at system start/shutdown time. Changes in v4: - Made changes to address review comments on previous patch. Changes in v3: - Made changes to immediately call orderly_poweroff upon receipt of OPAL EPOW, DPO notifications. - Made code changes to address review comments on previous patch. - Made code changes to use existing OPAL EPOW API. - Removed device-tree patch. Changes in v2: - Made code changes to improve code as per previous review comments. - Added patch to obtain EPOW event timeout values from OPAL device-tree. Vipin K Parashar (1): powerpc/powernv: Add poweroff (EPOW, DPO) events support for PowerNV platform arch/powerpc/include/asm/opal-api.h | 44 +++++++ arch/powerpc/include/asm/opal.h | 3 +- arch/powerpc/platforms/powernv/opal-power.c | 153 ++++++++++++++++++++++--- arch/powerpc/platforms/powernv/opal-wrappers.S | 1 + 4 files changed, 186 insertions(+), 15 deletions(-) -- 1.9.3