mirror of
https://github.com/qemu/qemu.git
synced 2024-12-11 04:33:53 +08:00
296e88fd9f
The block size determines the alignment requirements. Implement get_min_alignment() of the TYPE_MEMORY_DEVICE interface. This allows auto-assignment of a properly aligned address in guest physical address space. For example, when specifying a 2GB block size for a virtio-mem device with 10GB with a memory setup "-m 4G, 20G", we'll no longer fail when realizing. Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Wei Yang <richardw.yang@linux.intel.com> Cc: Dr. David Alan Gilbert <dgilbert@redhat.com> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20201008083029.9504-7-david@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
166 lines
5.4 KiB
C
166 lines
5.4 KiB
C
/*
|
|
* Virtio MEM PCI device
|
|
*
|
|
* Copyright (C) 2020 Red Hat, Inc.
|
|
*
|
|
* Authors:
|
|
* David Hildenbrand <david@redhat.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "virtio-mem-pci.h"
|
|
#include "hw/mem/memory-device.h"
|
|
#include "qapi/error.h"
|
|
#include "qapi/qapi-events-machine.h"
|
|
#include "qapi/qapi-events-misc.h"
|
|
|
|
static void virtio_mem_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
|
|
{
|
|
VirtIOMEMPCI *mem_pci = VIRTIO_MEM_PCI(vpci_dev);
|
|
DeviceState *vdev = DEVICE(&mem_pci->vdev);
|
|
|
|
virtio_pci_force_virtio_1(vpci_dev);
|
|
qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
|
|
}
|
|
|
|
static void virtio_mem_pci_set_addr(MemoryDeviceState *md, uint64_t addr,
|
|
Error **errp)
|
|
{
|
|
object_property_set_uint(OBJECT(md), VIRTIO_MEM_ADDR_PROP, addr, errp);
|
|
}
|
|
|
|
static uint64_t virtio_mem_pci_get_addr(const MemoryDeviceState *md)
|
|
{
|
|
return object_property_get_uint(OBJECT(md), VIRTIO_MEM_ADDR_PROP,
|
|
&error_abort);
|
|
}
|
|
|
|
static MemoryRegion *virtio_mem_pci_get_memory_region(MemoryDeviceState *md,
|
|
Error **errp)
|
|
{
|
|
VirtIOMEMPCI *pci_mem = VIRTIO_MEM_PCI(md);
|
|
VirtIOMEM *vmem = VIRTIO_MEM(&pci_mem->vdev);
|
|
VirtIOMEMClass *vmc = VIRTIO_MEM_GET_CLASS(vmem);
|
|
|
|
return vmc->get_memory_region(vmem, errp);
|
|
}
|
|
|
|
static uint64_t virtio_mem_pci_get_plugged_size(const MemoryDeviceState *md,
|
|
Error **errp)
|
|
{
|
|
return object_property_get_uint(OBJECT(md), VIRTIO_MEM_SIZE_PROP,
|
|
errp);
|
|
}
|
|
|
|
static void virtio_mem_pci_fill_device_info(const MemoryDeviceState *md,
|
|
MemoryDeviceInfo *info)
|
|
{
|
|
VirtioMEMDeviceInfo *vi = g_new0(VirtioMEMDeviceInfo, 1);
|
|
VirtIOMEMPCI *pci_mem = VIRTIO_MEM_PCI(md);
|
|
VirtIOMEM *vmem = VIRTIO_MEM(&pci_mem->vdev);
|
|
VirtIOMEMClass *vpc = VIRTIO_MEM_GET_CLASS(vmem);
|
|
DeviceState *dev = DEVICE(md);
|
|
|
|
if (dev->id) {
|
|
vi->has_id = true;
|
|
vi->id = g_strdup(dev->id);
|
|
}
|
|
|
|
/* let the real device handle everything else */
|
|
vpc->fill_device_info(vmem, vi);
|
|
|
|
info->u.virtio_mem.data = vi;
|
|
info->type = MEMORY_DEVICE_INFO_KIND_VIRTIO_MEM;
|
|
}
|
|
|
|
static uint64_t virtio_mem_pci_get_min_alignment(const MemoryDeviceState *md)
|
|
{
|
|
return object_property_get_uint(OBJECT(md), VIRTIO_MEM_BLOCK_SIZE_PROP,
|
|
&error_abort);
|
|
}
|
|
|
|
static void virtio_mem_pci_size_change_notify(Notifier *notifier, void *data)
|
|
{
|
|
VirtIOMEMPCI *pci_mem = container_of(notifier, VirtIOMEMPCI,
|
|
size_change_notifier);
|
|
DeviceState *dev = DEVICE(pci_mem);
|
|
const uint64_t * const size_p = data;
|
|
const char *id = NULL;
|
|
|
|
if (dev->id) {
|
|
id = g_strdup(dev->id);
|
|
}
|
|
|
|
qapi_event_send_memory_device_size_change(!!id, id, *size_p);
|
|
}
|
|
|
|
static void virtio_mem_pci_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
|
|
PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
|
|
MemoryDeviceClass *mdc = MEMORY_DEVICE_CLASS(klass);
|
|
|
|
k->realize = virtio_mem_pci_realize;
|
|
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
|
pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
|
|
pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_MEM;
|
|
pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
|
|
pcidev_k->class_id = PCI_CLASS_OTHERS;
|
|
|
|
mdc->get_addr = virtio_mem_pci_get_addr;
|
|
mdc->set_addr = virtio_mem_pci_set_addr;
|
|
mdc->get_plugged_size = virtio_mem_pci_get_plugged_size;
|
|
mdc->get_memory_region = virtio_mem_pci_get_memory_region;
|
|
mdc->fill_device_info = virtio_mem_pci_fill_device_info;
|
|
mdc->get_min_alignment = virtio_mem_pci_get_min_alignment;
|
|
}
|
|
|
|
static void virtio_mem_pci_instance_init(Object *obj)
|
|
{
|
|
VirtIOMEMPCI *dev = VIRTIO_MEM_PCI(obj);
|
|
VirtIOMEMClass *vmc;
|
|
VirtIOMEM *vmem;
|
|
|
|
virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
|
|
TYPE_VIRTIO_MEM);
|
|
|
|
dev->size_change_notifier.notify = virtio_mem_pci_size_change_notify;
|
|
vmem = VIRTIO_MEM(&dev->vdev);
|
|
vmc = VIRTIO_MEM_GET_CLASS(vmem);
|
|
/*
|
|
* We never remove the notifier again, as we expect both devices to
|
|
* disappear at the same time.
|
|
*/
|
|
vmc->add_size_change_notifier(vmem, &dev->size_change_notifier);
|
|
|
|
object_property_add_alias(obj, VIRTIO_MEM_BLOCK_SIZE_PROP,
|
|
OBJECT(&dev->vdev), VIRTIO_MEM_BLOCK_SIZE_PROP);
|
|
object_property_add_alias(obj, VIRTIO_MEM_SIZE_PROP, OBJECT(&dev->vdev),
|
|
VIRTIO_MEM_SIZE_PROP);
|
|
object_property_add_alias(obj, VIRTIO_MEM_REQUESTED_SIZE_PROP,
|
|
OBJECT(&dev->vdev),
|
|
VIRTIO_MEM_REQUESTED_SIZE_PROP);
|
|
}
|
|
|
|
static const VirtioPCIDeviceTypeInfo virtio_mem_pci_info = {
|
|
.base_name = TYPE_VIRTIO_MEM_PCI,
|
|
.generic_name = "virtio-mem-pci",
|
|
.instance_size = sizeof(VirtIOMEMPCI),
|
|
.instance_init = virtio_mem_pci_instance_init,
|
|
.class_init = virtio_mem_pci_class_init,
|
|
.interfaces = (InterfaceInfo[]) {
|
|
{ TYPE_MEMORY_DEVICE },
|
|
{ }
|
|
},
|
|
};
|
|
|
|
static void virtio_mem_pci_register_types(void)
|
|
{
|
|
virtio_pci_types_register(&virtio_mem_pci_info);
|
|
}
|
|
type_init(virtio_mem_pci_register_types)
|