From nobody Fri Nov 7 04:09:25 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1545374267744808.8854597780572; Thu, 20 Dec 2018 22:37:47 -0800 (PST) Received: from localhost ([::1]:42684 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gaERN-0000D9-5T for importer@patchew.org; Fri, 21 Dec 2018 01:37:45 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47030) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gaEQF-000843-5P for qemu-devel@nongnu.org; Fri, 21 Dec 2018 01:36:37 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gaEQB-0004qK-Rt for qemu-devel@nongnu.org; Fri, 21 Dec 2018 01:36:35 -0500 Received: from 14.mo6.mail-out.ovh.net ([46.105.56.113]:60304) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gaEQB-0004of-HG for qemu-devel@nongnu.org; Fri, 21 Dec 2018 01:36:31 -0500 Received: from player730.ha.ovh.net (unknown [10.109.146.19]) by mo6.mail-out.ovh.net (Postfix) with ESMTP id 242B71A0226 for ; Fri, 21 Dec 2018 07:36:30 +0100 (CET) Received: from kaod.org (lns-bzn-46-82-253-208-248.adsl.proxad.net [82.253.208.248]) (Authenticated sender: groug@kaod.org) by player730.ha.ovh.net (Postfix) with ESMTPSA id 868FCF32895; Fri, 21 Dec 2018 06:36:13 +0000 (UTC) From: Greg Kurz To: qemu-devel@nongnu.org Date: Fri, 21 Dec 2018 07:36:12 +0100 Message-ID: <154537417263.891798.7533381599337392867.stgit@bahia.lan> In-Reply-To: <154535246529.862554.6113740443866753456.stgit@bahia.lan> References: <154535246529.862554.6113740443866753456.stgit@bahia.lan> User-Agent: StGit/unknown-version MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Ovh-Tracer-Id: 9938599953435040194 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedtkedrudejgedgleeiucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuqfggjfdpvefjgfevmfevgfenuceurghilhhouhhtmecuhedttdenucesvcftvggtihhpihgvnhhtshculddquddttddm X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 46.105.56.113 Subject: [Qemu-devel] [PATCH 15/15] spapr: add hotplug hooks for PHB hotplug X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Cornelia Huck , Gerd Hoffmann , Eduardo Habkost , "Michael S. Tsirkin" , Alexey Kardashevskiy , David Hildenbrand , Michael Roth , qemu-s390x@nongnu.org, Dmitry Fleytman , qemu-ppc@nongnu.org, =?utf-8?q?C=C3=A9dric?= Le Goater , Marcel Apfelbaum , Paolo Bonzini , David Gibson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" From: Michael Roth Hotplugging PHBs is a machine-level operation, but PHBs reside on the main system bus, so we register spapr machine as the handler for the main system bus. We re-get the phandle of the interrupt controller systematically for simplicity. Signed-off-by: Michael Roth Signed-off-by: Greg Kurz --- hw/ppc/spapr.c | 147 ++++++++++++++++++++++++++++++++++++++++++++= ++++ hw/ppc/spapr_drc.c | 1=20 hw/ppc/spapr_pci.c | 16 ----- include/hw/ppc/spapr.h | 1=20 4 files changed, 149 insertions(+), 16 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 5c405a5fafca..065c9f19700e 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2923,6 +2923,10 @@ static void spapr_machine_init(MachineState *machine) register_savevm_live(NULL, "spapr/htab", -1, 1, &savevm_htab_handlers, spapr); =20 + if (smc->dr_phb_enabled) { + qbus_set_hotplug_handler(sysbus_get_default(), OBJECT(machine), NU= LL); + } + qemu_register_boot_set(spapr_boot_set, spapr); =20 if (kvm_enabled()) { @@ -3716,6 +3720,135 @@ out: error_propagate(errp, local_err); } =20 +static void spapr_phb_pre_plug(HotplugHandler *hotplug_dev, DeviceState *d= ev, + Error **errp) +{ + sPAPRMachineState *spapr =3D SPAPR_MACHINE(OBJECT(hotplug_dev)); + sPAPRPHBState *sphb =3D SPAPR_PCI_HOST_BRIDGE(dev); + sPAPRMachineClass *smc =3D SPAPR_MACHINE_GET_CLASS(spapr); + const unsigned windows_supported =3D spapr_phb_windows_supported(sphb); + + if (sphb->index =3D=3D (uint32_t)-1) { + error_setg(errp, "\"index\" for PAPR PHB is mandatory"); + return; + } + + /* + * This will check that sphb->index doesn't exceed the maximum number = of + * PHBs for the current machine type. + */ + smc->phb_placement(spapr, sphb->index, + &sphb->buid, &sphb->io_win_addr, + &sphb->mem_win_addr, &sphb->mem64_win_addr, + windows_supported, sphb->dma_liobn, errp); +} + +static void spapr_phb_plug(HotplugHandler *hotplug_dev, DeviceState *dev, + Error **errp) +{ + sPAPRMachineState *spapr =3D SPAPR_MACHINE(OBJECT(hotplug_dev)); + sPAPRMachineClass *smc =3D SPAPR_MACHINE_GET_CLASS(spapr); + sPAPRPHBState *sphb =3D SPAPR_PCI_HOST_BRIDGE(dev); + void *fdt =3D NULL; + int fdt_start_offset; + int fdt_size; + Error *local_err =3D NULL; + sPAPRDRConnector *drc; + int ret; + bool hotplugged =3D spapr_drc_hotplugged(dev); + int offset, phandle =3D 0; + gchar *nodename =3D NULL; + + if (!smc->dr_phb_enabled) { + return; + } + + drc =3D spapr_drc_by_id(TYPE_SPAPR_DRC_PHB, sphb->index); + /* hotplug hooks should check it's enabled before getting this far */ + assert(drc); + + if (hotplugged) { + if (spapr->fdt_blob) { + /* + * SLOF might have pushed an updated FDT with new phandle valu= es. + * Re-get the one of our interrupt controller. + */ + nodename =3D spapr->irq->get_nodename(spapr); + + offset =3D fdt_subnode_offset(spapr->fdt_blob, 0, nodename); + if (offset < 0) { + error_setg(errp, "Can't find node \"%s\": %s", + nodename, fdt_strerror(offset)); + goto out; + } + + phandle =3D fdt_get_phandle(spapr->fdt_blob, offset); + if (phandle < 0) { + error_setg(errp, "Can't get phandle of node \"%s\": %s", + nodename, fdt_strerror(offset)); + goto out; + } + } + DEVICE_GET_CLASS(dev)->reset(dev); + } + + /* For cold-plugged at initial boot and fallback for hotplug */ + if (!phandle) { + phandle =3D PHANDLE_XICP; + } + + fdt =3D create_device_tree(&fdt_size); + ret =3D spapr_populate_pci_dt(sphb, phandle, fdt, spapr->irq->nr_msis, + &fdt_start_offset); + if (ret < 0) { + error_setg(&local_err, "unable to create FDT for %sPHB", + dev->hotplugged ? "hotplugged " : ""); + goto out; + } + + if (hotplugged) { + /* generally SLOF creates these, for hotplug it's up to QEMU */ + _FDT(fdt_setprop_string(fdt, fdt_start_offset, "name", "pci")); + } + + spapr_drc_attach(drc, DEVICE(dev), fdt, fdt_start_offset, &local_err); + +out: + g_free(nodename); + + if (local_err) { + error_propagate(errp, local_err); + g_free(fdt); + return; + } + + if (hotplugged) { + spapr_hotplug_req_add_by_index(drc); + } else if (drc) { + spapr_drc_reset(drc); + } +} + +void spapr_phb_release(DeviceState *dev) +{ + object_unparent(OBJECT(dev)); +} + +static void spapr_phb_unplug_request(HotplugHandler *hotplug_dev, + DeviceState *dev, Error **errp) +{ + sPAPRPHBState *sphb =3D SPAPR_PCI_HOST_BRIDGE(dev); + sPAPRDRConnector *drc; + + drc =3D spapr_drc_by_id(TYPE_SPAPR_DRC_PHB, sphb->index); + assert(drc); + + if (!spapr_drc_unplug_requested(drc)) { + spapr_drc_detach(drc); + spapr_hotplug_req_remove_by_index(drc); + } +} + static void spapr_machine_device_plug(HotplugHandler *hotplug_dev, DeviceState *dev, Error **errp) { @@ -3723,6 +3856,8 @@ static void spapr_machine_device_plug(HotplugHandler = *hotplug_dev, spapr_memory_plug(hotplug_dev, dev, errp); } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_CPU_CORE)) { spapr_core_plug(hotplug_dev, dev, errp); + } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE= )) { + spapr_phb_plug(hotplug_dev, dev, errp); } } =20 @@ -3741,6 +3876,7 @@ static void spapr_machine_device_unplug_request(Hotpl= ugHandler *hotplug_dev, { sPAPRMachineState *sms =3D SPAPR_MACHINE(OBJECT(hotplug_dev)); MachineClass *mc =3D MACHINE_GET_CLASS(sms); + sPAPRMachineClass *smc =3D SPAPR_MACHINE_CLASS(mc); =20 if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) { if (spapr_ovec_test(sms->ov5_cas, OV5_HP_EVT)) { @@ -3760,6 +3896,12 @@ static void spapr_machine_device_unplug_request(Hotp= lugHandler *hotplug_dev, return; } spapr_core_unplug_request(hotplug_dev, dev, errp); + } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE= )) { + if (!smc->dr_phb_enabled) { + error_setg(errp, "PHB hot unplug not supported on this machine= "); + return; + } + spapr_phb_unplug_request(hotplug_dev, dev, errp); } } =20 @@ -3770,6 +3912,8 @@ static void spapr_machine_device_pre_plug(HotplugHand= ler *hotplug_dev, spapr_memory_pre_plug(hotplug_dev, dev, errp); } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_CPU_CORE)) { spapr_core_pre_plug(hotplug_dev, dev, errp); + } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE= )) { + spapr_phb_pre_plug(hotplug_dev, dev, errp); } } =20 @@ -3777,7 +3921,8 @@ static HotplugHandler *spapr_get_hotplug_handler(Mach= ineState *machine, DeviceState *dev) { if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM) || - object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_CPU_CORE)) { + object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_CPU_CORE) || + object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_PCI_HOST_BRIDGE)) { return HOTPLUG_HANDLER(machine); } return NULL; diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c index 189ee681062a..7a2676716364 100644 --- a/hw/ppc/spapr_drc.c +++ b/hw/ppc/spapr_drc.c @@ -703,6 +703,7 @@ static void spapr_drc_phb_class_init(ObjectClass *k, vo= id *data) drck->typeshift =3D SPAPR_DR_CONNECTOR_TYPE_SHIFT_PHB; drck->typename =3D "PHB"; drck->drc_name_prefix =3D "PHB "; + drck->release =3D spapr_phb_release; } =20 static const TypeInfo spapr_dr_connector_info =3D { diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index 688cca83ef2f..5bc912aa0028 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -1627,21 +1627,7 @@ static void spapr_phb_realize(DeviceState *dev, Erro= r **errp) return; } =20 - if (sphb->index !=3D (uint32_t)-1) { - Error *local_err =3D NULL; - - smc->phb_placement(spapr, sphb->index, - &sphb->buid, &sphb->io_win_addr, - &sphb->mem_win_addr, &sphb->mem64_win_addr, - windows_supported, sphb->dma_liobn, &local_err); - if (local_err) { - error_propagate(errp, local_err); - return; - } - } else { - error_setg(errp, "\"index\" for PAPR PHB is mandatory"); - return; - } + assert(sphb->index !=3D (uint32_t)-1); /* checked in spapr_phb_pre_plu= g() */ =20 if (sphb->mem64_win_size !=3D 0) { if (sphb->mem_win_size > SPAPR_PCI_MEM32_WIN_SIZE) { diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index e96deefa30de..eff479b0a019 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -764,6 +764,7 @@ int spapr_max_server_number(sPAPRMachineState *spapr); /* CPU and LMB DRC release callbacks. */ void spapr_core_release(DeviceState *dev); void spapr_lmb_release(DeviceState *dev); +void spapr_phb_release(DeviceState *dev); =20 void spapr_rtc_read(sPAPRRTCState *rtc, struct tm *tm, uint32_t *ns); int spapr_rtc_import_offset(sPAPRRTCState *rtc, int64_t legacy_offset);