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Tue, 12 Jul 2022 16:50:21 +0000 (GMT) Date: Tue, 12 Jul 2022 18:50:13 +0200 From: Claudio Imbrenda To: Steffen Eiden Cc: Heiko Carstens , Alexander Gordeev , Christian Borntraeger , Janosch Frank , Vasily Gorbik , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, nrb@linux.ibm.com Subject: Re: [PATCH 2/3] s390/cpufeature: allow for facility bits Message-ID: <20220712185013.3f9320eb@p-imbrenda> In-Reply-To: <20220712105220.325010-3-seiden@linux.ibm.com> References: <20220712105220.325010-1-seiden@linux.ibm.com> <20220712105220.325010-3-seiden@linux.ibm.com> Organization: IBM X-Mailer: Claws Mail 4.1.0 (GTK 3.24.34; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: bDkWKpek6FtOzfHNDJZooSSUhq3x4H-y X-Proofpoint-GUID: bDkWKpek6FtOzfHNDJZooSSUhq3x4H-y X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.883,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-07-12_10,2022-07-12_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=953 priorityscore=1501 clxscore=1015 spamscore=0 mlxscore=0 phishscore=0 suspectscore=0 bulkscore=0 lowpriorityscore=0 impostorscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2206140000 definitions=main-2207120065 ARC-Authentication-Results: i=1; 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dkim=pass header.d=ibm.com header.s=pp1 header.b=djogIvN3; spf=pass (imf16.hostedemail.com: domain of imbrenda@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=imbrenda@linux.ibm.com; dmarc=pass (policy=none) header.from=ibm.com X-Rspam-User: X-Rspamd-Server: rspam09 X-Stat-Signature: w9ieet8tocbgois83i1icb46jknpzm3g X-Rspamd-Queue-Id: 0A365180087 X-HE-Tag: 1657644627-876338 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000009, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, 12 Jul 2022 12:52:19 +0200 Steffen Eiden wrote: > From: Heiko Carstens > > Allow for facility bits to be used in cpu features. > > Signed-off-by: Heiko Carstens Reviewed-by: Claudio Imbrenda > --- > arch/s390/kernel/cpufeature.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/s390/kernel/cpufeature.c b/arch/s390/kernel/cpufeature.c > index ea4bbfd855db..e70b29804db4 100644 > --- a/arch/s390/kernel/cpufeature.c > +++ b/arch/s390/kernel/cpufeature.c > @@ -10,6 +10,7 @@ > > enum { > TYPE_HWCAP, > + TYPE_FACILITY, > }; > > struct s390_cpu_feature { > @@ -54,6 +55,8 @@ int cpu_have_feature(unsigned int num) > switch (feature->type) { > case TYPE_HWCAP: > return !!(elf_hwcap & (1UL << feature->num)); > + case TYPE_FACILITY: > + return test_facility(feature->num); > default: > WARN_ON_ONCE(1); > return 0;