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[PATCH v5 09/50] multi-process: setup PCI host bridge for remote device
From: |
Jagannathan Raman |
Subject: |
[PATCH v5 09/50] multi-process: setup PCI host bridge for remote device |
Date: |
Mon, 24 Feb 2020 15:55:00 -0500 |
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 <address@hidden>
Signed-off-by: John G Johnson <address@hidden>
Signed-off-by: Elena Ufimtseva <address@hidden>
---
v4 -> v5:
- Setting PCI bus name on the fly
- Unable to grab the PCI bus name from object hierarchy as
RemPCIHost have access to it during instantiation
hw/pci/Makefile.objs | 2 +-
include/remote/pcihost.h | 45 ++++++++++++++++++++++++++++++++++
remote/Makefile.objs | 1 +
remote/pcihost.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 111 insertions(+), 1 deletion(-)
create mode 100644 include/remote/pcihost.h
create mode 100644 remote/pcihost.c
diff --git a/hw/pci/Makefile.objs b/hw/pci/Makefile.objs
index 955be54..90693a7 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 0000000..7aca9cc
--- /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 <stddef.h>
+#include <stdint.h>
+
+#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 a9b2256..2757f5a 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 0000000..dbe0819
--- /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 <sys/types.h>
+#include <unistd.h>
+
+#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)
--
1.8.3.1
- [PATCH v5 00/50] Initial support for multi-process qemu, Jagannathan Raman, 2020/02/24
- [PATCH v5 02/50] multi-process: Refactor machine_init and exit notifiers, Jagannathan Raman, 2020/02/24
- [PATCH v5 03/50] multi-process: add a command line option for debug file, Jagannathan Raman, 2020/02/24
- [PATCH v5 01/50] multi-process: memory: alloc RAM from file at offset, Jagannathan Raman, 2020/02/24
- [PATCH v5 05/50] multi-process: Add config option for multi-process QEMU, Jagannathan Raman, 2020/02/24
- [PATCH v5 07/50] multi-process: define mpqemu-link object, Jagannathan Raman, 2020/02/24
- [PATCH v5 09/50] multi-process: setup PCI host bridge for remote device,
Jagannathan Raman <=
- [PATCH v5 06/50] multi-process: build system for remote device process, Jagannathan Raman, 2020/02/24
- [PATCH v5 08/50] multi-process: add functions to synchronize proxy and remote endpoints, Jagannathan Raman, 2020/02/24
- [PATCH v5 11/50] multi-process: setup memory manager for remote device, Jagannathan Raman, 2020/02/24
- [PATCH v5 10/50] multi-process: setup a machine object for remote device process, Jagannathan Raman, 2020/02/24
- [PATCH v5 12/50] multi-process: remote process initialization, Jagannathan Raman, 2020/02/24
- [PATCH v5 14/50] mutli-process: build remote command line args, Jagannathan Raman, 2020/02/24
- [PATCH v5 13/50] multi-process: introduce proxy object, Jagannathan Raman, 2020/02/24
- [PATCH v5 15/50] multi-process: PCI BAR read/write handling for proxy & remote endpoints, Jagannathan Raman, 2020/02/24
- [PATCH v5 16/50] multi-process: Synchronize remote memory, Jagannathan Raman, 2020/02/24
- [PATCH v5 18/50] multi-process: configure remote side devices, Jagannathan Raman, 2020/02/24