@@ -3221,6 +3221,8 @@ F: hw/remote/proxy.c
F: include/hw/remote/proxy.h
F: hw/remote/proxy-memory-listener.c
F: include/hw/remote/proxy-memory-listener.h
+F: hw/remote/iohub.c
+F: include/hw/remote/iohub.h
Build and test automation
-------------------------
@@ -192,6 +192,9 @@
#define PCI_DEVICE_ID_SUN_SIMBA 0x5000
#define PCI_DEVICE_ID_SUN_SABRE 0xa000
+#define PCI_VENDOR_ID_ORACLE 0x108e
+#define PCI_DEVICE_ID_REMOTE_IOHUB 0xb000
+
#define PCI_VENDOR_ID_CMD 0x1095
#define PCI_DEVICE_ID_CMD_646 0x0646
new file mode 100644
@@ -0,0 +1,42 @@
+/*
+ * IO Hub for remote device
+ *
+ * Copyright © 2018, 2021 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_IOHUB_H
+#define REMOTE_IOHUB_H
+
+#include "hw/pci/pci.h"
+#include "qemu/event_notifier.h"
+#include "qemu/thread-posix.h"
+#include "hw/remote/mpqemu-link.h"
+
+#define REMOTE_IOHUB_NB_PIRQS PCI_DEVFN_MAX
+
+typedef struct ResampleToken {
+ void *iohub;
+ int pirq;
+} ResampleToken;
+
+typedef struct RemoteIOHubState {
+ PCIDevice d;
+ EventNotifier irqfds[REMOTE_IOHUB_NB_PIRQS];
+ EventNotifier resamplefds[REMOTE_IOHUB_NB_PIRQS];
+ unsigned int irq_level[REMOTE_IOHUB_NB_PIRQS];
+ ResampleToken token[REMOTE_IOHUB_NB_PIRQS];
+ QemuMutex irq_level_lock[REMOTE_IOHUB_NB_PIRQS];
+} RemoteIOHubState;
+
+int remote_iohub_map_irq(PCIDevice *pci_dev, int intx);
+void remote_iohub_set_irq(void *opaque, int pirq, int level);
+void process_set_irqfd_msg(PCIDevice *pci_dev, MPQemuMsg *msg);
+
+void remote_iohub_init(RemoteIOHubState *iohub);
+void remote_iohub_finalize(RemoteIOHubState *iohub);
+
+#endif
@@ -15,11 +15,13 @@
#include "hw/boards.h"
#include "hw/pci-host/remote.h"
#include "io/channel.h"
+#include "hw/remote/iohub.h"
struct RemoteMachineState {
MachineState parent_obj;
RemotePCIHost *host;
+ RemoteIOHubState iohub;
};
/* Used to pass to co-routine device and ioc. */
@@ -39,6 +39,7 @@ typedef enum {
MPQEMU_CMD_PCI_CFGREAD,
MPQEMU_CMD_BAR_WRITE,
MPQEMU_CMD_BAR_READ,
+ MPQEMU_CMD_SET_IRQFD,
MPQEMU_CMD_MAX,
} MPQemuCmd;
@@ -12,6 +12,7 @@
#include "hw/pci/pci.h"
#include "io/channel.h"
#include "hw/remote/proxy-memory-listener.h"
+#include "qemu/event_notifier.h"
#define TYPE_PCI_PROXY_DEV "x-pci-proxy-dev"
OBJECT_DECLARE_SIMPLE_TYPE(PCIProxyDev, PCI_PROXY_DEV)
@@ -38,6 +39,9 @@ struct PCIProxyDev {
QIOChannel *ioc;
Error *migration_blocker;
ProxyMemoryListener proxy_listener;
+ int virq;
+ EventNotifier intr;
+ EventNotifier resample;
ProxyMemoryRegion region[PCI_NUM_REGIONS];
};
new file mode 100644
@@ -0,0 +1,119 @@
+/*
+ * Remote IO Hub
+ *
+ * Copyright © 2018, 2021 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 "qemu/osdep.h"
+#include "qemu-common.h"
+
+#include "hw/pci/pci.h"
+#include "hw/pci/pci_ids.h"
+#include "hw/pci/pci_bus.h"
+#include "qemu/thread.h"
+#include "hw/boards.h"
+#include "hw/remote/machine.h"
+#include "hw/remote/iohub.h"
+#include "qemu/main-loop.h"
+
+void remote_iohub_init(RemoteIOHubState *iohub)
+{
+ int pirq;
+
+ memset(&iohub->irqfds, 0, sizeof(iohub->irqfds));
+ memset(&iohub->resamplefds, 0, sizeof(iohub->resamplefds));
+
+ for (pirq = 0; pirq < REMOTE_IOHUB_NB_PIRQS; pirq++) {
+ qemu_mutex_init(&iohub->irq_level_lock[pirq]);
+ iohub->irq_level[pirq] = 0;
+ event_notifier_init_fd(&iohub->irqfds[pirq], -1);
+ event_notifier_init_fd(&iohub->resamplefds[pirq], -1);
+ }
+}
+
+void remote_iohub_finalize(RemoteIOHubState *iohub)
+{
+ int pirq;
+
+ for (pirq = 0; pirq < REMOTE_IOHUB_NB_PIRQS; pirq++) {
+ qemu_set_fd_handler(event_notifier_get_fd(&iohub->resamplefds[pirq]),
+ NULL, NULL, NULL);
+ event_notifier_cleanup(&iohub->irqfds[pirq]);
+ event_notifier_cleanup(&iohub->resamplefds[pirq]);
+ qemu_mutex_destroy(&iohub->irq_level_lock[pirq]);
+ }
+}
+
+int remote_iohub_map_irq(PCIDevice *pci_dev, int intx)
+{
+ return pci_dev->devfn;
+}
+
+void remote_iohub_set_irq(void *opaque, int pirq, int level)
+{
+ RemoteIOHubState *iohub = opaque;
+
+ assert(pirq >= 0);
+ assert(pirq < PCI_DEVFN_MAX);
+
+ QEMU_LOCK_GUARD(&iohub->irq_level_lock[pirq]);
+
+ if (level) {
+ if (++iohub->irq_level[pirq] == 1) {
+ event_notifier_set(&iohub->irqfds[pirq]);
+ }
+ } else if (iohub->irq_level[pirq] > 0) {
+ iohub->irq_level[pirq]--;
+ }
+}
+
+static void intr_resample_handler(void *opaque)
+{
+ ResampleToken *token = opaque;
+ RemoteIOHubState *iohub = token->iohub;
+ int pirq, s;
+
+ pirq = token->pirq;
+
+ s = event_notifier_test_and_clear(&iohub->resamplefds[pirq]);
+
+ assert(s >= 0);
+
+ QEMU_LOCK_GUARD(&iohub->irq_level_lock[pirq]);
+
+ if (iohub->irq_level[pirq]) {
+ event_notifier_set(&iohub->irqfds[pirq]);
+ }
+}
+
+void process_set_irqfd_msg(PCIDevice *pci_dev, MPQemuMsg *msg)
+{
+ RemoteMachineState *machine = REMOTE_MACHINE(current_machine);
+ RemoteIOHubState *iohub = &machine->iohub;
+ int pirq, intx;
+
+ intx = pci_get_byte(pci_dev->config + PCI_INTERRUPT_PIN) - 1;
+
+ pirq = remote_iohub_map_irq(pci_dev, intx);
+
+ if (event_notifier_get_fd(&iohub->irqfds[pirq]) != -1) {
+ qemu_set_fd_handler(event_notifier_get_fd(&iohub->resamplefds[pirq]),
+ NULL, NULL, NULL);
+ event_notifier_cleanup(&iohub->irqfds[pirq]);
+ event_notifier_cleanup(&iohub->resamplefds[pirq]);
+ memset(&iohub->token[pirq], 0, sizeof(ResampleToken));
+ }
+
+ event_notifier_init_fd(&iohub->irqfds[pirq], msg->fds[0]);
+ event_notifier_init_fd(&iohub->resamplefds[pirq], msg->fds[1]);
+
+ iohub->token[pirq].iohub = iohub;
+ iohub->token[pirq].pirq = pirq;
+
+ qemu_set_fd_handler(msg->fds[1], intr_resample_handler, NULL,
+ &iohub->token[pirq]);
+}
@@ -20,12 +20,15 @@
#include "exec/address-spaces.h"
#include "exec/memory.h"
#include "qapi/error.h"
+#include "hw/pci/pci_host.h"
+#include "hw/remote/iohub.h"
static void remote_machine_init(MachineState *machine)
{
MemoryRegion *system_memory, *system_io, *pci_memory;
RemoteMachineState *s = REMOTE_MACHINE(machine);
RemotePCIHost *rem_host;
+ PCIHostState *pci_host;
system_memory = get_system_memory();
system_io = get_system_io();
@@ -45,6 +48,13 @@ static void remote_machine_init(MachineState *machine)
memory_region_add_subregion_overlap(system_memory, 0x0, pci_memory, -1);
qdev_realize(DEVICE(rem_host), sysbus_get_default(), &error_fatal);
+
+ pci_host = PCI_HOST_BRIDGE(rem_host);
+
+ remote_iohub_init(&s->iohub);
+
+ pci_bus_irqs(pci_host->bus, remote_iohub_set_irq, remote_iohub_map_irq,
+ &s->iohub, REMOTE_IOHUB_NB_PIRQS);
}
static void remote_machine_class_init(ObjectClass *oc, void *data)
@@ -18,6 +18,7 @@
#include "hw/pci/pci.h"
#include "exec/memattrs.h"
#include "hw/remote/memory.h"
+#include "hw/remote/iohub.h"
static void process_config_write(QIOChannel *ioc, PCIDevice *dev,
MPQemuMsg *msg, Error **errp);
@@ -65,6 +66,9 @@ void coroutine_fn mpqemu_remote_msg_loop_co(void *data)
case MPQEMU_CMD_SYNC_SYSMEM:
remote_sysmem_reconfig(&msg, &local_err);
break;
+ case MPQEMU_CMD_SET_IRQFD:
+ process_set_irqfd_msg(pci_dev, &msg);
+ break;
default:
error_setg(&local_err,
"Unknown command (%d) received for device %s"
@@ -254,6 +254,11 @@ bool mpqemu_msg_valid(MPQemuMsg *msg)
return false;
}
break;
+ case MPQEMU_CMD_SET_IRQFD:
+ if (msg->size || (msg->num_fds != 2)) {
+ return false;
+ }
+ break;
default:
break;
}
@@ -21,6 +21,57 @@
#include "qemu/error-report.h"
#include "hw/remote/proxy-memory-listener.h"
#include "qom/object.h"
+#include "qemu/event_notifier.h"
+#include "sysemu/kvm.h"
+#include "util/event_notifier-posix.c"
+
+static void proxy_intx_update(PCIDevice *pci_dev)
+{
+ PCIProxyDev *dev = PCI_PROXY_DEV(pci_dev);
+ PCIINTxRoute route;
+ int pin = pci_get_byte(pci_dev->config + PCI_INTERRUPT_PIN) - 1;
+
+ if (dev->virq != -1) {
+ kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state, &dev->intr, dev->virq);
+ dev->virq = -1;
+ }
+
+ route = pci_device_route_intx_to_irq(pci_dev, pin);
+
+ dev->virq = route.irq;
+
+ if (dev->virq != -1) {
+ kvm_irqchip_add_irqfd_notifier_gsi(kvm_state, &dev->intr,
+ &dev->resample, dev->virq);
+ }
+}
+
+static void setup_irqfd(PCIProxyDev *dev)
+{
+ PCIDevice *pci_dev = PCI_DEVICE(dev);
+ MPQemuMsg msg;
+ Error *local_err = NULL;
+
+ event_notifier_init(&dev->intr, 0);
+ event_notifier_init(&dev->resample, 0);
+
+ memset(&msg, 0, sizeof(MPQemuMsg));
+ msg.cmd = MPQEMU_CMD_SET_IRQFD;
+ msg.num_fds = 2;
+ msg.fds[0] = event_notifier_get_fd(&dev->intr);
+ msg.fds[1] = event_notifier_get_fd(&dev->resample);
+ msg.size = 0;
+
+ if (!mpqemu_msg_send(&msg, dev->ioc, &local_err)) {
+ error_report_err(local_err);
+ }
+
+ dev->virq = -1;
+
+ proxy_intx_update(pci_dev);
+
+ pci_device_set_intx_routing_notifier(pci_dev, proxy_intx_update);
+}
static void pci_proxy_dev_realize(PCIDevice *device, Error **errp)
{
@@ -56,6 +107,8 @@ static void pci_proxy_dev_realize(PCIDevice *device, Error **errp)
qio_channel_set_blocking(dev->ioc, true, NULL);
proxy_memory_listener_configure(&dev->proxy_listener, dev->ioc);
+
+ setup_irqfd(dev);
}
static void pci_proxy_dev_exit(PCIDevice *pdev)
@@ -71,6 +124,9 @@ static void pci_proxy_dev_exit(PCIDevice *pdev)
error_free(dev->migration_blocker);
proxy_memory_listener_deconfigure(&dev->proxy_listener);
+
+ event_notifier_cleanup(&dev->intr);
+ event_notifier_cleanup(&dev->resample);
}
static void config_op_send(PCIProxyDev *pdev, uint32_t addr, uint32_t *val,
@@ -5,6 +5,7 @@ remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('mpqemu-link.c'))
remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('message.c'))
remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('remote-obj.c'))
remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('proxy.c'))
+remote_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('iohub.c'))
specific_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('memory.c'))
specific_ss.add(when: 'CONFIG_MULTIPROCESS', if_true: files('proxy-memory-listener.c'))