Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752364AbbEDJBH (ORCPT ); Mon, 4 May 2015 05:01:07 -0400 Received: from e23smtp06.au.ibm.com ([202.81.31.148]:40113 "EHLO e23smtp06.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752252AbbEDJA2 (ORCPT ); Mon, 4 May 2015 05:00:28 -0400 From: Shilpasri G Bhat To: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org Cc: rjw@rjwysocki.net, viresh.kumar@linaro.org, preeti@linux.vnet.ibm.com, linux-pm@vger.kernel.org, Shilpasri G Bhat Subject: [PATCH v3 2/6] powerpc/powernv: Add definition of OPAL_MSG_OCC message type Date: Mon, 4 May 2015 14:24:08 +0530 Message-Id: <1430729652-14813-3-git-send-email-shilpa.bhat@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1430729652-14813-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> References: <1430729652-14813-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15050409-0021-0000-0000-0000012ED5D1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2027 Lines: 57 Add OPAL_MSG_OCC message definition to opal_message_type to receive OCC events like reset, load and throttled. Host performance can be affected when OCC is reset or OCC throttles the max Pstate. We can register to opal_message_notifier to receive OPAL_MSG_OCC type of message and report it to the userspace so as to keep the user informed about the reason for a performance drop in workloads. The reset and load OCC events are notified to kernel when FSP sends OCC_RESET and OCC_LOAD commands. Both reset and load messages are sent to kernel on successful completion of reset and load operation respectively. The throttle OCC event indicates that the Pmax of the chip is reduced. The chip_id and throttle reason for reducing Pmax is also queued along with the message. Additional opal message type OPAL_MSG_PRD is added to maintain compatibility between opal and kernel definition of opal_message_type. Signed-off-by: Shilpasri G Bhat Reviewed-by: Preeti U Murthy --- No change from V2 Change from v1: - Update the commit changelog arch/powerpc/include/asm/opal-api.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index 0321a90..50053b7 100644 --- a/arch/powerpc/include/asm/opal-api.h +++ b/arch/powerpc/include/asm/opal-api.h @@ -352,6 +352,14 @@ enum opal_msg_type { OPAL_MSG_SHUTDOWN, /* params[0] = 1 reboot, 0 shutdown */ OPAL_MSG_HMI_EVT, OPAL_MSG_DPO, + OPAL_MSG_PRD, + OPAL_MSG_OCC, /* + * params[0] = 0 reset, + * 1 load, + * 2 throttle + * params[1] = chip_id + * params[2] = throttle_status + */ OPAL_MSG_TYPE_MAX, }; -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/