From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2CE02C433E0 for ; Wed, 3 Mar 2021 17:51:20 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7C3EF64EDB for ; Wed, 3 Mar 2021 17:51:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7C3EF64EDB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kaod.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4DrM4Q0mS0z3d79 for ; Thu, 4 Mar 2021 04:51:18 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=softfail (domain owner discourages use of this host) smtp.mailfrom=kaod.org (client-ip=148.163.158.5; helo=mx0b-001b2d01.pphosted.com; envelope-from=clg@kaod.org; receiver=) Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4DrM283lsGz3cYP for ; Thu, 4 Mar 2021 04:49:20 +1100 (AEDT) Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 123HWcfn028826; Wed, 3 Mar 2021 12:49:07 -0500 Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 372ehyh8ej-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 03 Mar 2021 12:49:07 -0500 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 123HheFQ031092; Wed, 3 Mar 2021 17:49:02 GMT Received: from b06cxnps3075.portsmouth.uk.ibm.com (d06relay10.portsmouth.uk.ibm.com [9.149.109.195]) by ppma03ams.nl.ibm.com with ESMTP id 371162j2dx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 03 Mar 2021 17:49:02 +0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 123Hn0OV49611236 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 3 Mar 2021 17:49:00 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6E90A11C04A; Wed, 3 Mar 2021 17:49:00 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3C45A11C052; Wed, 3 Mar 2021 17:49:00 +0000 (GMT) Received: from smtp.tlslab.ibm.com (unknown [9.101.4.1]) by d06av25.portsmouth.uk.ibm.com (Postfix) with SMTP; Wed, 3 Mar 2021 17:49:00 +0000 (GMT) Received: from yukon.ibmuc.com (unknown [9.171.85.87]) by smtp.tlslab.ibm.com (Postfix) with ESMTP id A84FE220423; Wed, 3 Mar 2021 18:48:59 +0100 (CET) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 2/8] powerpc/xive: Introduce an IPI interrupt domain Date: Wed, 3 Mar 2021 18:48:51 +0100 Message-Id: <20210303174857.1760393-3-clg@kaod.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210303174857.1760393-1-clg@kaod.org> References: <20210303174857.1760393-1-clg@kaod.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-03-03_05:2021-03-03, 2021-03-03 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1034 malwarescore=0 impostorscore=0 bulkscore=0 mlxlogscore=712 mlxscore=0 spamscore=0 lowpriorityscore=0 adultscore=0 phishscore=0 suspectscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103030124 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: Greg Kurz , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" The IPI interrupt is a special case of the XIVE IRQ domain. When mapping and unmapping the interrupts in the Linux interrupt number space, the HW interrupt number 0 (XIVE_IPI_HW_IRQ) is checked to distinguish the IPI interrupt from other interrupts of the system. Simplify the XIVE interrupt domain by introducing a specific domain for the IPI. Signed-off-by: C=C3=A9dric Le Goater --- arch/powerpc/sysdev/xive/common.c | 51 +++++++++++++------------------ 1 file changed, 22 insertions(+), 29 deletions(-) diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive= /common.c index b8e456da28aa..e7783760d278 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -63,6 +63,8 @@ static const struct xive_ops *xive_ops; static struct irq_domain *xive_irq_domain; =20 #ifdef CONFIG_SMP +static struct irq_domain *xive_ipi_irq_domain; + /* The IPIs all use the same logical irq number */ static u32 xive_ipi_irq; #endif @@ -1067,20 +1069,32 @@ static struct irq_chip xive_ipi_chip =3D { .irq_unmask =3D xive_ipi_do_nothing, }; =20 +/* + * IPIs are marked per-cpu. We use separate HW interrupts under the + * hood but associated with the same "linux" interrupt + */ +static int xive_ipi_irq_domain_map(struct irq_domain *h, unsigned int vi= rq, + irq_hw_number_t hw) +{ + irq_set_chip_and_handler(virq, &xive_ipi_chip, handle_percpu_irq); + return 0; +} + +static const struct irq_domain_ops xive_ipi_irq_domain_ops =3D { + .map =3D xive_ipi_irq_domain_map, +}; + static void __init xive_request_ipi(void) { unsigned int virq; =20 - /* - * Initialization failed, move on, we might manage to - * reach the point where we display our errors before - * the system falls appart - */ - if (!xive_irq_domain) + xive_ipi_irq_domain =3D irq_domain_add_linear(NULL, 1, + &xive_ipi_irq_domain_ops, NULL); + if (WARN_ON(xive_ipi_irq_domain =3D=3D NULL)) return; =20 /* Initialize it */ - virq =3D irq_create_mapping(xive_irq_domain, XIVE_IPI_HW_IRQ); + virq =3D irq_create_mapping(xive_ipi_irq_domain, XIVE_IPI_HW_IRQ); xive_ipi_irq =3D virq; =20 WARN_ON(request_irq(virq, xive_muxed_ipi_action, @@ -1178,19 +1192,6 @@ static int xive_irq_domain_map(struct irq_domain *= h, unsigned int virq, */ irq_clear_status_flags(virq, IRQ_LEVEL); =20 -#ifdef CONFIG_SMP - /* IPIs are special and come up with HW number 0 */ - if (hw =3D=3D XIVE_IPI_HW_IRQ) { - /* - * IPIs are marked per-cpu. We use separate HW interrupts under - * the hood but associated with the same "linux" interrupt - */ - irq_set_chip_and_handler(virq, &xive_ipi_chip, - handle_percpu_irq); - return 0; - } -#endif - rc =3D xive_irq_alloc_data(virq, hw); if (rc) return rc; @@ -1202,15 +1203,7 @@ static int xive_irq_domain_map(struct irq_domain *= h, unsigned int virq, =20 static void xive_irq_domain_unmap(struct irq_domain *d, unsigned int vir= q) { - struct irq_data *data =3D irq_get_irq_data(virq); - unsigned int hw_irq; - - /* XXX Assign BAD number */ - if (!data) - return; - hw_irq =3D (unsigned int)irqd_to_hwirq(data); - if (hw_irq !=3D XIVE_IPI_HW_IRQ) - xive_irq_free_data(virq); + xive_irq_free_data(virq); } =20 static int xive_irq_domain_xlate(struct irq_domain *h, struct device_nod= e *ct, --=20 2.26.2