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Fri, 17 Jul 2020 04:10:50 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C883AAE04D; Fri, 17 Jul 2020 04:10:46 +0000 (GMT) Received: from bangoria.ibmuc.com (unknown [9.199.41.4]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 17 Jul 2020 04:10:46 +0000 (GMT) From: Ravi Bangoria To: mpe@ellerman.id.au, mikey@neuling.org Subject: [PATCH v4 06/10] powerpc/watchpoint: Set CPU_FTR_DAWR1 based on pa-features bit Date: Fri, 17 Jul 2020 09:39:54 +0530 Message-Id: <20200717040958.70561-7-ravi.bangoria@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200717040958.70561-1-ravi.bangoria@linux.ibm.com> References: <20200717040958.70561-1-ravi.bangoria@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-16_11:2020-07-16, 2020-07-16 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_spam_definite policy=outbound score=100 suspectscore=0 mlxlogscore=-1000 priorityscore=1501 lowpriorityscore=0 clxscore=1015 adultscore=0 impostorscore=0 spamscore=100 malwarescore=0 bulkscore=0 mlxscore=100 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007170025 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: christophe.leroy@c-s.fr, ravi.bangoria@linux.ibm.com, apopple@linux.ibm.com, peterz@infradead.org, fweisbec@gmail.com, miltonm@us.ibm.com, oleg@redhat.com, npiggin@gmail.com, linux-kernel@vger.kernel.org, paulus@samba.org, jolsa@kernel.org, jniethe5@gmail.com, pedromfc@br.ibm.com, naveen.n.rao@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, mingo@kernel.org Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" As per the PAPR, bit 0 of byte 64 in pa-features property indicates availability of 2nd DAWR registers. i.e. If this bit is set, 2nd DAWR is present, otherwise not. Host generally uses "cpu-features", which masks "pa-features". But "cpu-features" are still not used for guests and thus this change is mostly applicable for guests only. Signed-off-by: Ravi Bangoria Tested-by: Jordan Niethe --- arch/powerpc/kernel/prom.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c index 9cc49f265c86..c76c09b97bc8 100644 --- a/arch/powerpc/kernel/prom.c +++ b/arch/powerpc/kernel/prom.c @@ -175,6 +175,8 @@ static struct ibm_pa_feature { */ { .pabyte = 22, .pabit = 0, .cpu_features = CPU_FTR_TM_COMP, .cpu_user_ftrs2 = PPC_FEATURE2_HTM_COMP | PPC_FEATURE2_HTM_NOSC_COMP }, + + { .pabyte = 64, .pabit = 0, .cpu_features = CPU_FTR_DAWR1 }, }; static void __init scan_features(unsigned long node, const unsigned char *ftrs,