Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932486AbbD1GYD (ORCPT ); Tue, 28 Apr 2015 02:24:03 -0400 Received: from e28smtp09.in.ibm.com ([122.248.162.9]:59457 "EHLO e28smtp09.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932292AbbD1GX5 (ORCPT ); Tue, 28 Apr 2015 02:23:57 -0400 From: Shilpasri G Bhat To: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org Cc: Shilpasri G Bhat Subject: [PATCH v2 1/2] powerpc/powernv: Add definition of OPAL_MSG_OCC message type Date: Tue, 28 Apr 2015 11:53:33 +0530 Message-Id: <1430202214-13807-2-git-send-email-shilpa.bhat@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1430202214-13807-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> References: <1430202214-13807-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15042806-0033-0000-0000-00000570BA13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2009 Lines: 55 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 --- Changes 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/