From patchwork Wed May 27 04:12:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vaibhav Jain X-Patchwork-Id: 11571739 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3F09360D for ; Wed, 27 May 2020 04:13:45 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 26B31206D5 for ; Wed, 27 May 2020 04:13:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 26B31206D5 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 854251225B119; Tue, 26 May 2020 21:09:36 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=vaibhav@linux.ibm.com; receiver= Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id AD5421225B112 for ; Tue, 26 May 2020 21:09:33 -0700 (PDT) Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 04R4A2Qv024093; Wed, 27 May 2020 00:13:09 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 316wysd038-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 27 May 2020 00:13:09 -0400 Received: from m0098413.ppops.net (m0098413.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 04R4AaAv026174; Wed, 27 May 2020 00:13:09 -0400 Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 316wysd028-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 27 May 2020 00:13:09 -0400 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 04R4BmJA026666; Wed, 27 May 2020 04:13:07 GMT Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by ppma04ams.nl.ibm.com with ESMTP id 316uf8y45p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 27 May 2020 04:13:07 +0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 04R4D4o016449664 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 27 May 2020 04:13:04 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 816BBA405B; Wed, 27 May 2020 04:13:04 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 64305A405F; Wed, 27 May 2020 04:12:58 +0000 (GMT) Received: from vajain21-in-ibm-com (unknown [9.85.121.50]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with SMTP; Wed, 27 May 2020 04:12:58 +0000 (GMT) Received: by vajain21-in-ibm-com (sSMTP sendmail emulation); Wed, 27 May 2020 09:42:56 +0530 From: Vaibhav Jain To: linuxppc-dev@lists.ozlabs.org, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org Subject: [PATCH v8 1/5] powerpc: Document details on H_SCM_HEALTH hcall Date: Wed, 27 May 2020 09:42:40 +0530 Message-Id: <20200527041244.37821-2-vaibhav@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200527041244.37821-1-vaibhav@linux.ibm.com> References: <20200527041244.37821-1-vaibhav@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-05-26_04:2020-05-26,2020-05-26 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 impostorscore=0 phishscore=0 adultscore=0 clxscore=1015 malwarescore=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 spamscore=0 mlxscore=0 bulkscore=0 cotscore=-2147483648 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005270024 Message-ID-Hash: FKGX3IMA6RBF7CZ6YE77JGUWICYSLRNQ X-Message-ID-Hash: FKGX3IMA6RBF7CZ6YE77JGUWICYSLRNQ X-MailFrom: vaibhav@linux.ibm.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Vaibhav Jain , "Aneesh Kumar K . V" , Michael Ellerman , Steven Rostedt X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: Add documentation to 'papr_hcalls.rst' describing the bitmap flags that are returned from H_SCM_HEALTH hcall as per the PAPR-SCM specification. Cc: "Aneesh Kumar K . V" Cc: Dan Williams Cc: Michael Ellerman Cc: Ira Weiny Signed-off-by: Vaibhav Jain --- Changelog: v7..v8: * Added a clarification on bit-ordering of Health Bitmap Resend: * None v6..v7: * None v5..v6: * New patch in the series --- Documentation/powerpc/papr_hcalls.rst | 45 ++++++++++++++++++++++++--- 1 file changed, 41 insertions(+), 4 deletions(-) diff --git a/Documentation/powerpc/papr_hcalls.rst b/Documentation/powerpc/papr_hcalls.rst index 3493631a60f8..45063f305813 100644 --- a/Documentation/powerpc/papr_hcalls.rst +++ b/Documentation/powerpc/papr_hcalls.rst @@ -220,13 +220,50 @@ from the LPAR memory. **H_SCM_HEALTH** | Input: drcIndex -| Out: *health-bitmap, health-bit-valid-bitmap* +| Out: *health-bitmap (r4), health-bit-valid-bitmap (r5)* | Return Value: *H_Success, H_Parameter, H_Hardware* Given a DRC Index return the info on predictive failure and overall health of -the NVDIMM. The asserted bits in the health-bitmap indicate a single predictive -failure and health-bit-valid-bitmap indicate which bits in health-bitmap are -valid. +the NVDIMM. The asserted bits in the health-bitmap indicate one or more states +(described in table below) of the NVDIMM and health-bit-valid-bitmap indicate +which bits in health-bitmap are valid. The bits are reported in +reverse bit ordering for example a value of 0xC400000000000000 +indicates bits 0, 1, and 5 are valid. + +Health Bitmap Flags: + ++------+-----------------------------------------------------------------------+ +| Bit | Definition | ++======+=======================================================================+ +| 00 | SCM device is unable to persist memory contents. | +| | If the system is powered down, nothing will be saved. | ++------+-----------------------------------------------------------------------+ +| 01 | SCM device failed to persist memory contents. Either contents were not| +| | saved successfully on power down or were not restored properly on | +| | power up. | ++------+-----------------------------------------------------------------------+ +| 02 | SCM device contents are persisted from previous IPL. The data from | +| | the last boot were successfully restored. | ++------+-----------------------------------------------------------------------+ +| 03 | SCM device contents are not persisted from previous IPL. There was no | +| | data to restore from the last boot. | ++------+-----------------------------------------------------------------------+ +| 04 | SCM device memory life remaining is critically low | ++------+-----------------------------------------------------------------------+ +| 05 | SCM device will be garded off next IPL due to failure | ++------+-----------------------------------------------------------------------+ +| 06 | SCM contents cannot persist due to current platform health status. A | +| | hardware failure may prevent data from being saved or restored. | ++------+-----------------------------------------------------------------------+ +| 07 | SCM device is unable to persist memory contents in certain conditions | ++------+-----------------------------------------------------------------------+ +| 08 | SCM device is encrypted | ++------+-----------------------------------------------------------------------+ +| 09 | SCM device has successfully completed a requested erase or secure | +| | erase procedure. | ++------+-----------------------------------------------------------------------+ +|10:63 | Reserved / Unused | ++------+-----------------------------------------------------------------------+ **H_SCM_PERFORMANCE_STATS**