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Subject: [PATCH v1 3/6] virtio: support adding sub-regions for notify region
Provide APIs to support querying whether the page-per-vq is enabled and adding sub-regions for notify region. Signed-off-by: Tiwei Bie <tiwei.bie@intel.com> --- Makefile.target | 4 ++++ hw/virtio/virtio-pci.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++ hw/virtio/virtio-pci.h | 5 +++++ hw/virtio/virtio.c | 39 +++++++++++++++++++++++++++++++++++++ include/hw/virtio/virtio.h | 5 +++++ include/qemu/osdep.h | 1 + 6 files changed, 102 insertions(+) diff --git a/Makefile.target b/Makefile.target index f9a9da7e7c..bdde6f94d2 100644 --- a/Makefile.target +++ b/Makefile.target @@ -39,6 +39,9 @@ STPFILES= config-target.h: config-target.h-timestamp config-target.h-timestamp: config-target.mak +config-devices.h: config-devices.h-timestamp +config-devices.h-timestamp: config-devices.mak + ifdef CONFIG_TRACE_SYSTEMTAP stap: $(QEMU_PROG).stp-installed $(QEMU_PROG).stp $(QEMU_PROG)-simpletrace.stp @@ -224,4 +227,5 @@ ifdef CONFIG_TRACE_SYSTEMTAP endif GENERATED_FILES += config-target.h +GENERATED_FILES += config-devices.h Makefile: $(GENERATED_FILES) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index e92837c42b..a7d790c411 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1534,6 +1534,54 @@ static void virtio_pci_modern_io_region_unmap(VirtIOPCIProxy *proxy, ®ion->mr); } +static VirtIOPCIProxy *virtio_device_to_virtio_pci_proxy(VirtIODevice *vdev) +{ + VirtIOPCIProxy *proxy = NULL; + + if (vdev->device_id == VIRTIO_ID_NET) { + VirtIONetPCI *d = container_of(vdev, VirtIONetPCI, vdev.parent_obj); + proxy = &d->parent_obj; + } + + return proxy; +} + +bool virtio_pci_page_per_vq_enabled(VirtIODevice *vdev) +{ + VirtIOPCIProxy *proxy = virtio_device_to_virtio_pci_proxy(vdev); + + if (proxy == NULL) { + return false; + } + + return !!(proxy->flags & VIRTIO_PCI_FLAG_PAGE_PER_VQ); +} + +int virtio_pci_notify_region_map(VirtIODevice *vdev, int queue_idx, + MemoryRegion *mr) +{ + VirtIOPCIProxy *proxy = virtio_device_to_virtio_pci_proxy(vdev); + int offset; + + if (proxy == NULL || !virtio_pci_modern(proxy)) { + return -1; + } + + offset = virtio_pci_queue_mem_mult(proxy) * queue_idx; + memory_region_add_subregion(&proxy->notify.mr, offset, mr); + + return 0; +} + +void virtio_pci_notify_region_unmap(VirtIODevice *vdev, MemoryRegion *mr) +{ + VirtIOPCIProxy *proxy = virtio_device_to_virtio_pci_proxy(vdev); + + if (proxy != NULL) { + memory_region_del_subregion(&proxy->notify.mr, mr); + } +} + static void virtio_pci_pre_plugged(DeviceState *d, Error **errp) { VirtIOPCIProxy *proxy = VIRTIO_PCI(d); diff --git a/hw/virtio/virtio-pci.h b/hw/virtio/virtio-pci.h index 12d3a90686..41dbc3d274 100644 --- a/hw/virtio/virtio-pci.h +++ b/hw/virtio/virtio-pci.h @@ -209,6 +209,11 @@ static inline void virtio_pci_disable_modern(VirtIOPCIProxy *proxy) proxy->disable_modern = true; } +bool virtio_pci_page_per_vq_enabled(VirtIODevice *vdev); +int virtio_pci_notify_region_map(VirtIODevice *vdev, int queue_idx, + MemoryRegion *mr); +void virtio_pci_notify_region_unmap(VirtIODevice *vdev, MemoryRegion *mr); + /* * virtio-scsi-pci: This extends VirtioPCIProxy. */ diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index ad564b0132..325349c8b9 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -22,6 +22,7 @@ #include "qemu/atomic.h" #include "hw/virtio/virtio-bus.h" #include "hw/virtio/virtio-access.h" +#include "hw/virtio/virtio-pci.h" #include "sysemu/dma.h" /* @@ -2661,6 +2662,44 @@ void virtio_device_release_ioeventfd(VirtIODevice *vdev) virtio_bus_release_ioeventfd(vbus); } +bool virtio_device_parent_is_pci_device(VirtIODevice *vdev) +{ + BusState *qbus = qdev_get_parent_bus(DEVICE(vdev)); + const char *typename = object_get_typename(OBJECT(qbus->parent)); + + return strstr(typename, "pci") != NULL; +} + +bool virtio_device_page_per_vq_enabled(VirtIODevice *vdev) +{ +#ifdef CONFIG_VIRTIO_PCI + if (virtio_device_parent_is_pci_device(vdev)) { + return virtio_pci_page_per_vq_enabled(vdev); + } +#endif + return false; +} + +int virtio_device_notify_region_map(VirtIODevice *vdev, int queue_idx, + MemoryRegion *mr) +{ +#ifdef CONFIG_VIRTIO_PCI + if (virtio_device_parent_is_pci_device(vdev)) { + return virtio_pci_notify_region_map(vdev, queue_idx, mr); + } +#endif + return -1; +} + +void virtio_device_notify_region_unmap(VirtIODevice *vdev, MemoryRegion *mr) +{ +#ifdef CONFIG_VIRTIO_PCI + if (virtio_device_parent_is_pci_device(vdev)) { + virtio_pci_notify_region_unmap(vdev, mr); + } +#endif +} + static void virtio_device_class_init(ObjectClass *klass, void *data) { /* Set the default value here. */ diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index 098bdaaea3..b14accdb08 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -285,6 +285,11 @@ void virtio_device_stop_ioeventfd(VirtIODevice *vdev); int virtio_device_grab_ioeventfd(VirtIODevice *vdev); void virtio_device_release_ioeventfd(VirtIODevice *vdev); bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev); +bool virtio_device_parent_is_pci_device(VirtIODevice *vdev); +bool virtio_device_page_per_vq_enabled(VirtIODevice *vdev); +int virtio_device_notify_region_map(VirtIODevice *vdev, int queue_idx, + MemoryRegion *mr); +void virtio_device_notify_region_unmap(VirtIODevice *vdev, MemoryRegion *mr); EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq); void virtio_queue_host_notifier_read(EventNotifier *n); void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx, diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index e8568a0a54..1975db7dac 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -30,6 +30,7 @@ #include "config-host.h" #ifdef NEED_CPU_H #include "config-target.h" +#include "config-devices.h" #else #include "exec/poison.h" #endif -- 2.13.3
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