F: include/hw/virtio/vhost-user-scmi.h
F: tests/qtest/libqos/virtio-scmi.*
-vdpa-net
-M: Hao Chen <chenh@yusur.tech>
-S: Maintained
-F: docs/system/devices/vdpa-net.rst
-
virtio-crypto
M: Gonglei <arei.gonglei@huawei.com>
S: Supported
devices/canokey.rst
devices/usb-u2f.rst
devices/igb.rst
- devices/vdpa-net.rst
+++ /dev/null
-vdpa net
-============
-
-This document explains the setup and usage of the vdpa network device.
-The vdpa network device is a paravirtualized vdpa emulate device.
-
-Description
------------
-
-VDPA net devices support dirty page bitmap mark and vring state saving and recovery.
-
-Users can use this VDPA device for live migration simulation testing in a nested virtualization environment.
-
-Registers layout
-----------------
-
-The vdpa device add live migrate registers layout as follow::
-
- Offset Register Name Bitwidth Associated vq
- 0x0 LM_LOGGING_CTRL 4bits
- 0x10 LM_BASE_ADDR_LOW 32bits
- 0x14 LM_BASE_ADDR_HIGH 32bits
- 0x18 LM_END_ADDR_LOW 32bits
- 0x1c LM_END_ADDR_HIGH 32bits
- 0x20 LM_RING_STATE_OFFSET 32bits vq0
- 0x24 LM_RING_STATE_OFFSET 32bits vq1
- 0x28 LM_RING_STATE_OFFSET 32bits vq2
- ......
- 0x20+1023*4 LM_RING_STATE_OFFSET 32bits vq1023
-
-These registers are extended at the end of the notify bar space.
-
-Architecture diagram
---------------------
-::
-
- |------------------------------------------------------------------------|
- | guest-L1-user-space |
- | |
- | |----------------------------------------|
- | | [virtio-net driver] |
- | | ^ guest-L2-src(iommu=on) |
- | |--------------|-------------------------|
- | | | qemu-L2-src(viommu) |
- | [dpdk-vdpa]<->[vhost socket]<-+->[vhost-user backend(iommu=on)] |
- --------------------------------------------------------------------------
- --------------------------------------------------------------------------
- | ^ guest-L1-kernel-space |
- | | |
- | [VFIO] |
- | ^ |
- | | guest-L1-src(iommu=on) |
- --------|-----------------------------------------------------------------
- --------|-----------------------------------------------------------------
- | [vdpa net device(iommu=on)] [manager nic device] |
- | | | |
- | | | |
- | [tap device] qemu-L1-src(viommu) | |
- ------------------------------------------------+-------------------------
- |
- |
- --------------------- |
- | kernel net bridge |<-----
- | virbr0 |<----------------------------------
- --------------------- |
- |
- |
- -------------------------------------------------------------------------- |
- | guest-L1-user-space | |
- | | |
- | |----------------------------------------| |
- | | [virtio-net driver] | |
- | | ^ guest-L2-dst(iommu=on) | |
- | |--------------|-------------------------| |
- | | | qemu-L2-dst(viommu) | |
- | [dpdk-vdpa]<->[vhost socket]<-+->[vhost-user backend(iommu=on)] | |
- -------------------------------------------------------------------------- |
- -------------------------------------------------------------------------- |
- | ^ guest-L1-kernel-space | |
- | | | |
- | [VFIO] | |
- | ^ | |
- | | guest-L1-dst(iommu=on) | |
- --------|----------------------------------------------------------------- |
- --------|----------------------------------------------------------------- |
- | [vdpa net device(iommu=on)] [manager nic device]----------------+----
- | | |
- | | |
- | [tap device] qemu-L1-dst(viommu) |
- --------------------------------------------------------------------------
-
-
-Device properties
------------------
-
-The Virtio vdpa device can be configured with the following properties:
-
- * ``vdpa=on`` open vdpa device emulated.
-
-Usages
---------
-This patch add virtio sriov support and vdpa live migrate support.
-You can open vdpa by set xml file as follow::
-
- <qemu:commandline xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
- <qemu:arg value='-device'/>
- <qemu:arg value='intel-iommu,intremap=on,device-iotlb=on,aw-bits=48'/>
- <qemu:arg value='-netdev'/>
- <qemu:arg value='tap,id=hostnet1,script=no,downscript=no,vhost=off'/>
- <qemu:arg value='-device'/>
- <qemu:arg value='virtio-net-pci,netdev=hostnet1,id=net1,mac=56:4a:b7:4f:4d:a9,bus=pci.6,addr=0x0,iommu_platform=on,ats=on,vdpa=on'/>
- </qemu:commandline>
-
-Limitations
------------
-1. Dependent on tap device with param ``vhost=off``.
-2. Nested virtualization environment only supports ``q35`` machines.
-3. Current only support split vring live migrate.
-
-
-
goto err;
}
- /* Mark dirty page's bitmap of guest memory */
- if (vdev->lm_logging_ctrl == LM_ENABLE) {
- uint64_t chunk = elem->in_addr[i] / VHOST_LOG_CHUNK;
- /* Get chunk index */
- BitmapMemoryRegionCaches *caches = qatomic_rcu_read(&vdev->caches);
- uint64_t index = chunk / 8;
- uint64_t shift = chunk % 8;
- uint8_t val = 0;
- address_space_read_cached(&caches->bitmap, index, &val,
- sizeof(val));
- val |= 1 << shift;
- address_space_write_cached(&caches->bitmap, index, &val,
- sizeof(val));
- address_space_cache_invalidate(&caches->bitmap, index, sizeof(val));
- }
-
elems[i] = elem;
lens[i] = total;
i++;
return virtio_pci_add_mem_cap(proxy, &cap.cap);
}
-/* Called within call_rcu(). */
-static void bitmap_free_region_cache(BitmapMemoryRegionCaches *caches)
-{
- assert(caches != NULL);
- address_space_cache_destroy(&caches->bitmap);
- g_free(caches);
-}
-
-static void lm_disable(VirtIODevice *vdev)
-{
- BitmapMemoryRegionCaches *caches;
- caches = qatomic_read(&vdev->caches);
- qatomic_rcu_set(&vdev->caches, NULL);
- if (caches) {
- call_rcu(caches, bitmap_free_region_cache, rcu);
- }
-}
-
-static void lm_enable(VirtIODevice *vdev)
-{
- BitmapMemoryRegionCaches *old = vdev->caches;
- BitmapMemoryRegionCaches *new = NULL;
- hwaddr addr, end, size;
- int64_t len;
-
- addr = vdev->lm_base_addr_low | ((hwaddr)(vdev->lm_base_addr_high) << 32);
- end = vdev->lm_end_addr_low | ((hwaddr)(vdev->lm_end_addr_high) << 32);
- size = end - addr;
- if (size <= 0) {
- error_report("Invalid lm size.");
- return;
- }
-
- new = g_new0(BitmapMemoryRegionCaches, 1);
- len = address_space_cache_init(&new->bitmap, vdev->dma_as, addr, size,
- true);
- if (len < size) {
- virtio_error(vdev, "Cannot map bitmap");
- goto err_bitmap;
- }
- qatomic_rcu_set(&vdev->caches, new);
-
- if (old) {
- call_rcu(old, bitmap_free_region_cache, rcu);
- }
-
- return;
-
-err_bitmap:
- address_space_cache_destroy(&new->bitmap);
- g_free(new);
-}
-
-static uint64_t virtio_pci_lm_read(void *opaque, hwaddr addr,
- unsigned size)
-{
- VirtIOPCIProxy *proxy = opaque;
- VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
- hwaddr offset_end = LM_VRING_STATE_OFFSET +
- virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX;
- uint32_t val;
- int qid;
-
- if (vdev == NULL) {
- return UINT64_MAX;
- }
- switch (addr) {
- case LM_LOGGING_CTRL:
- val = vdev->lm_logging_ctrl;
- break;
- case LM_BASE_ADDR_LOW:
- val = vdev->lm_base_addr_low;
- break;
- case LM_BASE_ADDR_HIGH:
- val = vdev->lm_base_addr_high;
- break;
- case LM_END_ADDR_LOW:
- val = vdev->lm_end_addr_low;
- break;
- case LM_END_ADDR_HIGH:
- val = vdev->lm_end_addr_high;
- break;
- default:
- if (addr >= LM_VRING_STATE_OFFSET && addr <= offset_end) {
- qid = (addr - LM_VRING_STATE_OFFSET) /
- virtio_pci_queue_mem_mult(proxy);
- val = virtio_queue_get_vring_states(vdev, qid);
- } else
- val = 0;
-
- break;
- }
-
- return val;
-}
-
-static void virtio_pci_lm_write(void *opaque, hwaddr addr,
- uint64_t val, unsigned size)
-{
- VirtIOPCIProxy *proxy = opaque;
- VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
- hwaddr offset_end = LM_VRING_STATE_OFFSET +
- virtio_pci_queue_mem_mult(proxy) * VIRTIO_QUEUE_MAX;
- int qid;
-
- if (vdev == NULL) {
- return;
- }
-
- switch (addr) {
- case LM_LOGGING_CTRL:
- vdev->lm_logging_ctrl = val;
- switch (val) {
- case LM_DISABLE:
- lm_disable(vdev);
- break;
- case LM_ENABLE:
- lm_enable(vdev);
- break;
- default:
- virtio_error(vdev, "Unsupport LM_LOGGING_CTRL value: %"PRIx64,
- val);
- break;
- };
-
- break;
- case LM_BASE_ADDR_LOW:
- vdev->lm_base_addr_low = val;
- break;
- case LM_BASE_ADDR_HIGH:
- vdev->lm_base_addr_high = val;
- break;
- case LM_END_ADDR_LOW:
- vdev->lm_end_addr_low = val;
- break;
- case LM_END_ADDR_HIGH:
- vdev->lm_end_addr_high = val;
- break;
- default:
- if (addr >= LM_VRING_STATE_OFFSET && addr <= offset_end) {
- qid = (addr - LM_VRING_STATE_OFFSET) /
- virtio_pci_queue_mem_mult(proxy);
- virtio_queue_set_vring_states(vdev, qid, val);
- } else
- virtio_error(vdev, "Unsupport addr: %"PRIx64, addr);
- break;
- }
-}
-
static uint64_t virtio_pci_common_read(void *opaque, hwaddr addr,
unsigned size)
{
},
.endianness = DEVICE_LITTLE_ENDIAN,
};
- static const MemoryRegionOps lm_ops = {
- .read = virtio_pci_lm_read,
- .write = virtio_pci_lm_write,
- .impl = {
- .min_access_size = 1,
- .max_access_size = 4,
- },
- .endianness = DEVICE_LITTLE_ENDIAN,
- };
g_autoptr(GString) name = g_string_new(NULL);
g_string_printf(name, "virtio-pci-common-%s", vdev_name);
proxy,
name->str,
proxy->notify_pio.size);
- if (proxy->flags & VIRTIO_PCI_FLAG_VDPA) {
- g_string_printf(name, "virtio-pci-lm-%s", vdev_name);
- memory_region_init_io(&proxy->lm.mr, OBJECT(proxy),
- &lm_ops,
- proxy,
- name->str,
- proxy->lm.size);
- }
}
static void virtio_pci_modern_region_map(VirtIOPCIProxy *proxy,
virtio_pci_modern_mem_region_map(proxy, &proxy->isr, &cap);
virtio_pci_modern_mem_region_map(proxy, &proxy->device, &cap);
virtio_pci_modern_mem_region_map(proxy, &proxy->notify, ¬ify.cap);
- if (proxy->flags & VIRTIO_PCI_FLAG_VDPA) {
- memory_region_add_subregion(&proxy->modern_bar,
- proxy->lm.offset, &proxy->lm.mr);
- }
if (modern_pio) {
memory_region_init(&proxy->io_bar, OBJECT(proxy),
virtio_pci_modern_mem_region_unmap(proxy, &proxy->isr);
virtio_pci_modern_mem_region_unmap(proxy, &proxy->device);
virtio_pci_modern_mem_region_unmap(proxy, &proxy->notify);
- if (proxy->flags & VIRTIO_PCI_FLAG_VDPA) {
- memory_region_del_subregion(&proxy->modern_bar, &proxy->lm.mr);
- }
if (modern_pio) {
virtio_pci_modern_io_region_unmap(proxy, &proxy->notify_pio);
}
proxy->notify_pio.type = VIRTIO_PCI_CAP_NOTIFY_CFG;
/* subclasses can enforce modern, so do this unconditionally */
- if (!(proxy->flags & VIRTIO_PCI_FLAG_VDPA)) {
- memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
- /* PCI BAR regions must be powers of 2 */
- pow2ceil(proxy->notify.offset + proxy->notify.size));
- } else {
- proxy->lm.offset = proxy->notify.offset + proxy->notify.size;
- proxy->lm.size = 0x20 + VIRTIO_QUEUE_MAX * 4;
- memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
- /* PCI BAR regions must be powers of 2 */
- pow2ceil(proxy->lm.offset + proxy->lm.size));
- }
+ memory_region_init(&proxy->modern_bar, OBJECT(proxy), "virtio-pci",
+ /* PCI BAR regions must be powers of 2 */
+ pow2ceil(proxy->notify.offset + proxy->notify.size));
if (proxy->disable_legacy == ON_OFF_AUTO_AUTO) {
proxy->disable_legacy = pcie_port ? ON_OFF_AUTO_ON : ON_OFF_AUTO_OFF;
VIRTIO_PCI_FLAG_INIT_FLR_BIT, true),
DEFINE_PROP_BIT("aer", VirtIOPCIProxy, flags,
VIRTIO_PCI_FLAG_AER_BIT, false),
- DEFINE_PROP_BIT("vdpa", VirtIOPCIProxy, flags,
- VIRTIO_PCI_FLAG_VDPA_BIT, false),
DEFINE_PROP_END_OF_LIST(),
};
return vdev->vq[n].last_avail_idx;
}
-static uint32_t virtio_queue_split_get_vring_states(VirtIODevice *vdev,
- int n)
-{
- struct VirtQueue *vq = &vdev->vq[n];
- uint16_t avail, used;
-
- avail = vq->last_avail_idx;
- used = vq->used_idx;
-
- return avail | (uint32_t)used << 16;
-}
-
unsigned int virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n)
{
if (virtio_vdev_has_feature(vdev, VIRTIO_F_RING_PACKED)) {
}
}
-unsigned int virtio_queue_get_vring_states(VirtIODevice *vdev, int n)
-{
- if (virtio_vdev_has_feature(vdev, VIRTIO_F_RING_PACKED)) {
- return -1;
- } else {
- return virtio_queue_split_get_vring_states(vdev, n);
- }
-}
-
-static void virtio_queue_split_set_vring_states(VirtIODevice *vdev,
- int n, uint32_t idx)
-{
- struct VirtQueue *vq = &vdev->vq[n];
- vq->last_avail_idx = (uint16_t)(idx & 0xffff);
- vq->shadow_avail_idx = (uint16_t)(idx & 0xffff);
- vq->used_idx = (uint16_t)(idx >> 16);
-}
-
-void virtio_queue_set_vring_states(VirtIODevice *vdev, int n, uint32_t idx)
-{
- if (virtio_vdev_has_feature(vdev, VIRTIO_F_RING_PACKED)) {
- return;
- } else {
- virtio_queue_split_set_vring_states(vdev, n, idx);
- }
-}
-
static void virtio_queue_packed_set_last_avail_idx(VirtIODevice *vdev,
int n, unsigned int idx)
{
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. */
#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;
};
VirtIOPCIRegion regs[5];
};
- VirtIOPCIRegion lm;
MemoryRegion modern_bar;
MemoryRegion io_bar;
uint32_t legacy_io_bar_idx;
(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,
VIRTIO_DEVICE_ENDIAN_BIG,
};
-typedef struct BitmapMemoryRegionCaches {
- struct rcu_head rcu;
- MemoryRegionCache bitmap;
-} BitmapMemoryRegionCaches;
-
/**
* struct VirtIODevice - common VirtIO structure
* @name: name of the device
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() */
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);
#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. */
projects / qemu.git / commitdiff