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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 9 Jul 2019 09:08:29 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x6988T4r52625656 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 9 Jul 2019 08:08:29 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E24C74C059; Tue, 9 Jul 2019 08:08:28 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8E0D44C063; Tue, 9 Jul 2019 08:08:28 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 9 Jul 2019 08:08:28 +0000 (GMT) Received: from [10.61.2.125] (haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 781FAA023B; Tue, 9 Jul 2019 18:08:27 +1000 (AEST) Subject: Re: [PATCH v5] powerpc/64s: support nospectre_v2 cmdline option From: Andrew Donnellan To: "Christopher M. Riedl" , linuxppc-dev@ozlabs.org References: <20190524024647.381-1-cmr@informatik.wtf> <98c47360-c89c-5f4d-1c32-f6ac0ddd7f1e@linux.ibm.com> Date: Tue, 9 Jul 2019 18:08:24 +1000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <98c47360-c89c-5f4d-1c32-f6ac0ddd7f1e@linux.ibm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-AU Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 19070908-0008-0000-0000-000002FB3060 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19070908-0009-0000-0000-000022688F80 Message-Id: <2690a0cf-4d41-badf-d5c2-c8937ad804cd@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-07-09_03:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907090097 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: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On 5/6/19 5:42 pm, Andrew Donnellan wrote: > On 24/5/19 12:46 pm, Christopher M. Riedl wrote: >> Add support for disabling the kernel implemented spectre v2 mitigation >> (count cache flush on context switch) via the nospectre_v2 and >> mitigations=off cmdline options. >> >> Suggested-by: Michael Ellerman >> Signed-off-by: Christopher M. Riedl >> Reviewed-by: Andrew Donnellan > > snowpatch is whinging about this breaking the build for some reason... > https://patchwork.ozlabs.org/patch/1104583/ Upon further inspection, it appears this was bogus, and now snowpatch is passing it happily. -- Andrew Donnellan OzLabs, ADL Canberra ajd@linux.ibm.com IBM Australia Limited