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Mon, 14 Jun 2021 16:40:47 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EAF80136051; Mon, 14 Jun 2021 16:40:44 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.199.37.120]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 14 Jun 2021 16:40:44 +0000 (GMT) From: "Aneesh Kumar K.V" To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au Subject: [RFC PATCH 6/8] powerpc/pseries: Add a helper for form1 cpu distance Date: Mon, 14 Jun 2021 22:10:01 +0530 Message-Id: <20210614164003.196094-7-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210614164003.196094-1-aneesh.kumar@linux.ibm.com> References: <20210614164003.196094-1-aneesh.kumar@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: lEe2DqFhEPw_ttglw7sGWAXEEaNLkrZp X-Proofpoint-ORIG-GUID: nARvEpvLm9CBiHZUx6YanfCAGgpx5FdF X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.761 definitions=2021-06-14_10:2021-06-14, 2021-06-14 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 malwarescore=0 suspectscore=0 lowpriorityscore=0 phishscore=0 mlxlogscore=999 bulkscore=0 spamscore=0 clxscore=1015 priorityscore=1501 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2106140104 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: Nathan Lynch , "Aneesh Kumar K.V" , Daniel Henrique Barboza , David Gibson Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This helper is only used with the dispatch trace log collection. A later patch will add Form2 affinity support and this change helps in keeping that simpler. Also add a comment explaining we don't expect the code to be called with FORM0 Signed-off-by: Aneesh Kumar K.V --- arch/powerpc/mm/numa.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 64caaf07cf82..696e5bfe1414 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -166,7 +166,7 @@ static void unmap_cpu_from_node(unsigned long cpu) } #endif /* CONFIG_HOTPLUG_CPU || CONFIG_PPC_SPLPAR */ -int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) +static int __cpu_form1_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) { int dist = 0; @@ -182,6 +182,14 @@ int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) return dist; } +int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc) +{ + /* We should not get called with FORM0 */ + VM_WARN_ON(affinity_form == FORM0_AFFINITY); + + return __cpu_form1_distance(cpu1_assoc, cpu2_assoc); +} + /* must hold reference to node during call */ static const __be32 *of_get_associativity(struct device_node *dev) { -- 2.31.1