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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 23 Mar 2020 13:22:57 -0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02NDLsX043516240 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 23 Mar 2020 13:21:55 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id ACA09A4051; Mon, 23 Mar 2020 13:22:56 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4FE86A4040; Mon, 23 Mar 2020 13:22:56 +0000 (GMT) Received: from localhost (unknown [9.85.127.193]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 23 Mar 2020 13:22:56 +0000 (GMT) Date: Mon, 23 Mar 2020 18:52:51 +0530 From: "Naveen N. Rao" Subject: Re: [PATCH] powerpc xmon: drop the option `i` in cacheflush To: Balamuruhan S , Segher Boessenkool References: <20200323112548.1077440-1-bala24@linux.ibm.com> <20200323124630.GP22482@gate.crashing.org> In-Reply-To: <20200323124630.GP22482@gate.crashing.org> MIME-Version: 1.0 User-Agent: astroid/v0.15-13-gb675b421 (https://github.com/astroidmail/astroid) Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 x-cbid: 20032313-4275-0000-0000-000003B17C27 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20032313-4276-0000-0000-000038C6B2B7 Message-Id: <1584968594.gguy53jubt.naveen@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.645 definitions=2020-03-23_04:2020-03-21, 2020-03-23 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 mlxlogscore=787 impostorscore=0 suspectscore=0 clxscore=1015 spamscore=0 malwarescore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003230073 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: ravi.bangoria@linux.ibm.com, jniethe5@gmail.com, paulus@samba.org, sandipan@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Segher Boessenkool wrote: > On Mon, Mar 23, 2020 at 04:55:48PM +0530, Balamuruhan S wrote: >> Data Cache Block Invalidate (dcbi) instruction implemented in 32-bit >> designs prior to PowerPC architecture version 2.01 and got obsolete >> from version 2.01. >=20 > It was added back in 2.03. It also exists in 64-bit designs (using > category embedded), in 2.07 still even. Indeed, it has been part of Book3e. It isn't clear if this is still useful in this context (xmon) though,=20 since 'dcbf' seems to be equivalent in most respects. At the very least,=20 we should restrict this to Book3e, if it is of value there. - Naveen