From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by sourceware.org (Postfix) with ESMTPS id 0FDFC386F434 for ; Tue, 19 May 2020 02:05:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 0FDFC386F434 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 04J233ng113095 for ; Mon, 18 May 2020 22:05:02 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 312cahd5fx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 18 May 2020 22:05:02 -0400 Received: from m0098414.ppops.net (m0098414.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 04J23RRR114364 for ; Mon, 18 May 2020 22:05:02 -0400 Received: from ppma03wdc.us.ibm.com (ba.79.3fa9.ip4.static.sl-reverse.com [169.63.121.186]) by mx0b-001b2d01.pphosted.com with ESMTP id 312cahd5fk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 18 May 2020 22:05:02 -0400 Received: from pps.filterd (ppma03wdc.us.ibm.com [127.0.0.1]) by ppma03wdc.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 04J1xJGS006610; Tue, 19 May 2020 02:05:01 GMT Received: from b03cxnp08025.gho.boulder.ibm.com (b03cxnp08025.gho.boulder.ibm.com [9.17.130.17]) by ppma03wdc.us.ibm.com with ESMTP id 313wne2861-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 19 May 2020 02:05:01 +0000 Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 04J24xHu19857900 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 19 May 2020 02:04:59 GMT Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D538CC6057; Tue, 19 May 2020 02:04:59 +0000 (GMT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9E3EBC6055; Tue, 19 May 2020 02:04:59 +0000 (GMT) Received: from Bills-MacBook-Pro.local (unknown [9.211.79.20]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 19 May 2020 02:04:59 +0000 (GMT) Reply-To: wschmidt@linux.ibm.com Subject: Re: PowerPC POWER10 updates to dcbf, sync and wait instructions To: Alan Modra , Peter Bergner Cc: Tulio Magno Quites Machado Filho , binutils@sourceware.org References: <87tv0dc8p0.fsf@linux.ibm.com> <72332561-af6e-ad9c-a6fe-73358aaa3b22@linux.ibm.com> <20200519010456.GI1088@bubble.grove.modra.org> From: Bill Schmidt Message-ID: <027660ca-38aa-25ca-f09d-f366c7b65d16@linux.ibm.com> Date: Mon, 18 May 2020 21:04:59 -0500 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <20200519010456.GI1088@bubble.grove.modra.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-GB X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.676 definitions=2020-05-18_06:2020-05-15, 2020-05-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 suspectscore=0 bulkscore=0 mlxlogscore=999 adultscore=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 cotscore=-2147483648 phishscore=0 malwarescore=0 priorityscore=1501 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005190017 X-Spam-Status: No, score=-6.3 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: binutils@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Binutils mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 May 2020 02:05:04 -0000 On 5/18/20 8:04 PM, Alan Modra wrote: > On Mon, May 18, 2020 at 04:40:24PM -0500, Peter Bergner wrote: >> On 5/18/20 3:03 PM, Tulio Magno Quites Machado Filho wrote: >>> Power ISA 3.1 states the following (page 1038): >>> >>> The encodings for dcbfps, dcbstps, plwsync, and phwsync were chosen to >>> enable software developed to control updates to persistent storage on >>> processors that comply with Version 3.1 and subsequent versions of the >>> architecture to run compatibly on the POWER9 processor. >>> >>> So, I think these instructions should be available on POWER9 too. >> [snip] >>> Likewise here. >>> Power ISA 3.1, page 1087, figure 5 better describes how they're executed on >>> earlier processors. >> I don't think this is saying we should enable the new mnemonics on POWER9, >> but rather if one of these is assembled for POWER10, that they'll run on >> POWER9 just fine. Ditto for the sync insns. >> >> Alan or Bill, >> >> How do you read those paragraphs? > With the same conclusion as you do. > Likewise.