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Thu, 23 Apr 2020 04:14:50 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3020.oracle.com with ESMTP id 30gb942guj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 23 Apr 2020 04:14:50 +0000 Received: from abhmp0020.oracle.com (abhmp0020.oracle.com [141.146.116.26]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 03N4Enai017657; Thu, 23 Apr 2020 04:14:49 GMT Received: from flaka.hsd1.ca.comcast.net (/67.180.143.163) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 22 Apr 2020 21:14:48 -0700 From: elena.ufimtseva@oracle.com To: qemu-devel@nongnu.org Subject: [PATCH RESEND v6 13/36] multi-process: setup PCI host bridge for remote device Date: Wed, 22 Apr 2020 21:13:48 -0700 Message-Id: X-Mailer: git-send-email 2.25.GIT In-Reply-To: References: MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9599 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 adultscore=0 bulkscore=0 suspectscore=1 malwarescore=0 phishscore=0 spamscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004230027 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9599 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 spamscore=0 mlxscore=0 clxscore=1015 suspectscore=1 phishscore=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 malwarescore=0 priorityscore=1501 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004230027 Received-SPF: pass client-ip=156.151.31.85; envelope-from=elena.ufimtseva@oracle.com; helo=userp2120.oracle.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/04/23 00:14:40 X-ACL-Warn: Detected OS = Linux 3.x [generic] [fuzzy] X-Received-From: 156.151.31.85 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: elena.ufimtseva@oracle.com, fam@euphon.net, swapnil.ingle@nutanix.com, john.g.johnson@oracle.com, kraxel@redhat.com, jag.raman@oracle.com, quintela@redhat.com, mst@redhat.com, armbru@redhat.com, kanth.ghatraju@oracle.com, felipe@nutanix.com, thuth@redhat.com, ehabkost@redhat.com, konrad.wilk@oracle.com, dgilbert@redhat.com, liran.alon@oracle.com, stefanha@redhat.com, thanos.makatos@nutanix.com, rth@twiddle.net, kwolf@redhat.com, berrange@redhat.com, mreitz@redhat.com, ross.lagerwall@citrix.com, marcandre.lureau@gmail.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Jagannathan Raman PCI host bridge is setup for the remote device process. It is implemented using remote-pcihost object. It is an extension of the PCI host bridge setup by QEMU. Remote-pcihost configures a PCI bus which could be used by the remote PCI device to latch on to. Signed-off-by: Jagannathan Raman Signed-off-by: John G Johnson Signed-off-by: Elena Ufimtseva --- MAINTAINERS | 2 ++ hw/pci/Makefile.objs | 2 +- include/remote/pcihost.h | 45 ++++++++++++++++++++++++++++ remote/Makefile.objs | 1 + remote/pcihost.c | 64 ++++++++++++++++++++++++++++++++++++++++ 5 files changed, 113 insertions(+), 1 deletion(-) create mode 100644 include/remote/pcihost.h create mode 100644 remote/pcihost.c diff --git a/MAINTAINERS b/MAINTAINERS index 93ad693da4..0cda5ee06a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2859,6 +2859,8 @@ F: remote/Makefile.objs F: remote/remote-main.c F: include/io/mpqemu-link.h F: io/mpqemu-link.c +F: include/remote/pcihost.h +F: remote/pcihost.c Build and test automation ------------------------- diff --git a/hw/pci/Makefile.objs b/hw/pci/Makefile.objs index 955be54472..90693a7695 100644 --- a/hw/pci/Makefile.objs +++ b/hw/pci/Makefile.objs @@ -13,6 +13,6 @@ common-obj-$(CONFIG_PCI_EXPRESS) += pcie_port.o pcie_host.o common-obj-$(call lnot,$(CONFIG_PCI)) += pci-stub.o common-obj-$(CONFIG_ALL) += pci-stub.o -remote-pci-obj-$(CONFIG_MPQEMU) += pci.o pci_bridge.o +remote-pci-obj-$(CONFIG_MPQEMU) += pci.o pci_bridge.o pci_host.o pcie_host.o remote-pci-obj-$(CONFIG_MPQEMU) += msi.o msix.o remote-pci-obj-$(CONFIG_MPQEMU) += pcie.o diff --git a/include/remote/pcihost.h b/include/remote/pcihost.h new file mode 100644 index 0000000000..7aca9ccaf1 --- /dev/null +++ b/include/remote/pcihost.h @@ -0,0 +1,45 @@ +/* + * PCI Host for remote device + * + * Copyright © 2018, 2020 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#ifndef REMOTE_PCIHOST_H +#define REMOTE_PCIHOST_H + +#include +#include + +#include "exec/memory.h" +#include "hw/pci/pcie_host.h" + +#define TYPE_REMOTE_HOST_DEVICE "remote-pcihost" +#define REMOTE_HOST_DEVICE(obj) \ + OBJECT_CHECK(RemPCIHost, (obj), TYPE_REMOTE_HOST_DEVICE) + +typedef struct RemPCIHost { + /*< private >*/ + PCIExpressHost parent_obj; + /*< public >*/ + + /* + * Memory Controller Hub (MCH) may not be necessary for the emulation + * program. The two important reasons for implementing a PCI host in the + * emulation program are: + * - Provide a PCI bus for IO devices + * - Enable translation of guest PA to the PCI bar regions + * + * For both the above mentioned purposes, it doesn't look like we would + * need the MCH + */ + + MemoryRegion *mr_pci_mem; + MemoryRegion *mr_sys_mem; + MemoryRegion *mr_sys_io; +} RemPCIHost; + +#endif diff --git a/remote/Makefile.objs b/remote/Makefile.objs index a9b2256b2a..2757f5a265 100644 --- a/remote/Makefile.objs +++ b/remote/Makefile.objs @@ -1 +1,2 @@ remote-pci-obj-$(CONFIG_MPQEMU) += remote-main.o +remote-pci-obj-$(CONFIG_MPQEMU) += pcihost.o diff --git a/remote/pcihost.c b/remote/pcihost.c new file mode 100644 index 0000000000..dbe081903e --- /dev/null +++ b/remote/pcihost.c @@ -0,0 +1,64 @@ +/* + * Remote PCI host device + * + * Copyright © 2018, 2020 Oracle and/or its affiliates. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include +#include + +#include "qemu/osdep.h" +#include "hw/pci/pci.h" +#include "hw/pci/pci_host.h" +#include "hw/pci/pcie_host.h" +#include "hw/qdev-properties.h" +#include "remote/pcihost.h" +#include "exec/memory.h" + +static const char *remote_host_root_bus_path(PCIHostState *host_bridge, + PCIBus *rootbus) +{ + return "0000:00"; +} + +static void remote_host_realize(DeviceState *dev, Error **errp) +{ + char *busname = g_strdup_printf("remote-pci-%ld", (unsigned long)getpid()); + PCIHostState *pci = PCI_HOST_BRIDGE(dev); + RemPCIHost *s = REMOTE_HOST_DEVICE(dev); + + pci->bus = pci_root_bus_new(DEVICE(s), busname, + s->mr_pci_mem, s->mr_sys_io, + 0, TYPE_PCIE_BUS); +} + +static void remote_host_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass); + + hc->root_bus_path = remote_host_root_bus_path; + dc->realize = remote_host_realize; + + dc->user_creatable = false; + set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); + dc->fw_name = "pci"; +} + +static const TypeInfo remote_host_info = { + .name = TYPE_REMOTE_HOST_DEVICE, + .parent = TYPE_PCIE_HOST_BRIDGE, + .instance_size = sizeof(RemPCIHost), + .class_init = remote_host_class_init, +}; + +static void remote_machine_register(void) +{ + type_register_static(&remote_host_info); +} + +type_init(remote_machine_register)