Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934246AbcKVSGy (ORCPT ); Tue, 22 Nov 2016 13:06:54 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:57235 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S934057AbcKVSGv (ORCPT ); Tue, 22 Nov 2016 13:06:51 -0500 From: "Gautham R. Shenoy" To: Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Michael Neuling , Vaidyanathan Srinivasan , "Shreyas B. Prabhu" Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, "Gautham R. Shenoy" Subject: [PATCH] powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online Date: Tue, 22 Nov 2016 23:36:40 +0530 X-Mailer: git-send-email 1.8.3.1 X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16112218-0056-0000-0000-000002013442 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006124; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000189; SDB=6.00783970; UDB=6.00378660; IPR=6.00561588; BA=6.00004902; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00013408; XFM=3.00000011; UTC=2016-11-22 18:06:48 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16112218-0057-0000-0000-000006343659 Message-Id: <1479838000-380-1-git-send-email-ego@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-11-22_10:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1609300000 definitions=main-1611220316 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 859 Lines: 32 From: "Gautham R. Shenoy" Ensure that PSSCR is set to a safe value corresponding to no state-loss each time a POWER9 CPU comes online. Signed-off-by: Gautham R. Shenoy --- arch/powerpc/kernel/cpu_setup_power.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S index 52ff3f0..37ad045 100644 --- a/arch/powerpc/kernel/cpu_setup_power.S +++ b/arch/powerpc/kernel/cpu_setup_power.S @@ -96,6 +96,7 @@ _GLOBAL(__setup_cpu_power9) mtlr r11 beqlr li r0,0 + mtspr SPRN_PSSCR,r0 mtspr SPRN_LPID,r0 mfspr r3,SPRN_LPCR ori r3, r3, LPCR_PECEDH @@ -116,6 +117,7 @@ _GLOBAL(__restore_cpu_power9) mtlr r11 beqlr li r0,0 + mtspr SPRN_PSSCR,r0 mtspr SPRN_LPID,r0 mfspr r3,SPRN_LPCR ori r3, r3, LPCR_PECEDH -- 1.9.4