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hw/virtio: Add support for VDPA network simulation devices

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This patch adds support for VDPA network simulation devices.
The device is developed based on virtio-net and tap backend,
and supports hardware live migration function.

For more details, please refer to "docs/system/devices/vdpa-net.rst"

Signed-off-by: Hao Chen <chenh@yusur.tech>
Message-Id: <20240221073802.2888022-1-chenh@yusur.tech>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Hao Chen 2024-02-21 15:38:02 +08:00 • committed by Michael S. Tsirkin
parent 043e127a12
commit cd341fd1ff
9 changed files with 399 additions and 3 deletions
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5
include/hw/virtio/virtio-pci.h
View file

@ -43,6 +43,7 @@ enum {
VIRTIO_PCI_FLAG_INIT_FLR_BIT,
VIRTIO_PCI_FLAG_AER_BIT,
VIRTIO_PCI_FLAG_ATS_PAGE_ALIGNED_BIT,
VIRTIO_PCI_FLAG_VDPA_BIT,
};
/* Need to activate work-arounds for buggy guests at vmstate load. */
@ -89,6 +90,9 @@ enum {
#define VIRTIO_PCI_FLAG_ATS_PAGE_ALIGNED \
(1 << VIRTIO_PCI_FLAG_ATS_PAGE_ALIGNED_BIT)
/* VDPA supported flags */
#define VIRTIO_PCI_FLAG_VDPA (1 << VIRTIO_PCI_FLAG_VDPA_BIT)
typedef struct {
MSIMessage msg;
int virq;
@ -140,6 +144,7 @@ struct VirtIOPCIProxy {
};
VirtIOPCIRegion regs[5];
};
VirtIOPCIRegion lm;
MemoryRegion modern_bar;
MemoryRegion io_bar;
uint32_t legacy_io_bar_idx;

19
include/hw/virtio/virtio.h
View file

@ -35,6 +35,9 @@
(0x1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) | \
(0x1ULL << VIRTIO_F_ANY_LAYOUT))
#define LM_DISABLE 0x00
#define LM_ENABLE 0x01
struct VirtQueue;
static inline hwaddr vring_align(hwaddr addr,
@ -95,6 +98,11 @@ enum virtio_device_endian {
VIRTIO_DEVICE_ENDIAN_BIG,
};
typedef struct BitmapMemoryRegionCaches {
struct rcu_head rcu;
MemoryRegionCache bitmap;
} BitmapMemoryRegionCaches;
/**
* struct VirtIODevice - common VirtIO structure
* @name: name of the device
@ -128,6 +136,14 @@ struct VirtIODevice
uint32_t generation;
int nvectors;
VirtQueue *vq;
uint8_t lm_logging_ctrl;
uint32_t lm_base_addr_low;
uint32_t lm_base_addr_high;
uint32_t lm_end_addr_low;
uint32_t lm_end_addr_high;
BitmapMemoryRegionCaches *caches;
MemoryListener listener;
uint16_t device_id;
/* @vm_running: current VM running state via virtio_vmstate_change() */
@ -379,8 +395,11 @@ hwaddr virtio_queue_get_desc_size(VirtIODevice *vdev, int n);
hwaddr virtio_queue_get_avail_size(VirtIODevice *vdev, int n);
hwaddr virtio_queue_get_used_size(VirtIODevice *vdev, int n);
unsigned int virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n);
unsigned int virtio_queue_get_vring_states(VirtIODevice *vdev, int n);
void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n,
unsigned int idx);
void virtio_queue_set_vring_states(VirtIODevice *vdev, int n,
unsigned int idx);
void virtio_queue_restore_last_avail_idx(VirtIODevice *vdev, int n);
void virtio_queue_invalidate_signalled_used(VirtIODevice *vdev, int n);
void virtio_queue_update_used_idx(VirtIODevice *vdev, int n);

7
include/standard-headers/linux/virtio_pci.h
View file

@ -221,6 +221,13 @@ struct virtio_pci_cfg_cap {
#define VIRTIO_PCI_COMMON_ADM_Q_IDX 60
#define VIRTIO_PCI_COMMON_ADM_Q_NUM 62
#define LM_LOGGING_CTRL 0
#define LM_BASE_ADDR_LOW 4
#define LM_BASE_ADDR_HIGH 8
#define LM_END_ADDR_LOW 12
#define LM_END_ADDR_HIGH 16
#define LM_VRING_STATE_OFFSET 0x20
#endif /* VIRTIO_PCI_NO_MODERN */
/* Admin command status. */