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Fri, 30 Oct 2020 03:45:17 +0000 (GMT) Received: from [9.206.155.107] (unknown [9.206.155.107]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id C59BDA01E7; Fri, 30 Oct 2020 14:45:15 +1100 (AEDT) Subject: Re: [PATCH 02/29] powerpc/rtas: prevent suspend-related sys_rtas use on LE To: Nathan Lynch , linuxppc-dev@lists.ozlabs.org References: <20201030011805.1224603-1-nathanl@linux.ibm.com> <20201030011805.1224603-3-nathanl@linux.ibm.com> From: Andrew Donnellan Message-ID: Date: Fri, 30 Oct 2020 14:45:05 +1100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20201030011805.1224603-3-nathanl@linux.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312, 18.0.737 definitions=2020-10-29_12:2020-10-29, 2020-10-29 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 spamscore=0 clxscore=1015 mlxscore=0 priorityscore=1501 phishscore=0 adultscore=0 malwarescore=0 mlxlogscore=728 bulkscore=0 lowpriorityscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010300025 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tyreld@linux.ibm.com, brking@linux.ibm.com, mmc@linux.vnet.ibm.com, cforno12@linux.vnet.ibm.com, drt@linux.vnet.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 30/10/20 12:17 pm, Nathan Lynch wrote: > While drmgr has had work in some areas to make its RTAS syscall > interactions endian-neutral, its code for performing partition > migration via the syscall has never worked on LE. While it is able to > complete ibm,suspend-me successfully, it crashes when attempting the > subsequent ibm,update-nodes call. > > drmgr is the only known (or plausible) user of these ibm,suspend-me, > ibm,update-nodes, and ibm,update-properties, so allow them only in > big-endian configurations. And there's a zero chance that drmgr will ever be fixed on LE? -- Andrew Donnellan OzLabs, ADL Canberra ajd@linux.ibm.com IBM Australia Limited