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vmm: Provide a common method to build a virtio PCI device

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Since more virtio devices will be added and this code can be reused
for any type of virtio device.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
This commit is contained in:
Chao Peng 2019-05-08 10:41:24 +00:00 committed by Samuel Ortiz
parent c0be6642ad
commit 97865b605f
1 changed files with 55 additions and 54 deletions
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109
vmm/src/vm.rs
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@ -328,34 +328,15 @@ impl DeviceManager {
// Add virtio-blk
let virtio_block_device =
vm_virtio::Block::new(raw_img, false).map_err(Error::CreateVirtioBlock)?;
let virtio_block_device = Box::new(virtio_block_device);
let mut virtio_pci_device = VirtioPciDevice::new(memory.clone(), virtio_block_device)
.map_err(|_| Error::VirtioDevice)?;
let bars = virtio_pci_device
.allocate_bars(allocator)
.map_err(Error::AllocateBars)?;
for (event, addr, _) in virtio_pci_device.ioeventfds() {
let io_addr = IoEventAddress::Mmio(addr);
vm_fd
.register_ioevent(event.as_raw_fd(), &io_addr, NoDatamatch)
.map_err(Error::RegisterIoevent)?;
}
// Assign IRQ to the virtio-blk device
let irqfd = EventFd::new(EFD_NONBLOCK).map_err(Error::EventFd)?;
let irq_num = allocator.allocate_irq().ok_or(Error::AllocateIrq)?;
vm_fd
.register_irqfd(irqfd.as_raw_fd(), irq_num)
.map_err(Error::Irq)?;
// Let's use irq line INTA for now.
virtio_pci_device.assign_irq(irqfd, irq_num as u32, PciInterruptPin::IntA);
let virtio_pci_device = Arc::new(Mutex::new(virtio_pci_device));
pci_root
.add_device(virtio_pci_device.clone(), &mut mmio_bus, bars)
.map_err(Error::AddPciDevice)?;
DeviceManager::add_virtio_pci_device(
Box::new(virtio_block_device),
memory.clone(),
allocator,
vm_fd,
&mut pci_root,
&mut mmio_bus,
)?;
// Add virtio-net if required
if let Some(net_params) = &vm_cfg.net_params {
@ -364,34 +345,15 @@ impl DeviceManager {
let tap = Tap::open_named(tap_if_name).unwrap();
let virtio_net_device = vm_virtio::Net::new_with_tap(tap, Some(&mac))
.map_err(Error::CreateVirtioNet)?;
let virtio_net_device = Box::new(virtio_net_device);
let mut virtio_pci_device = VirtioPciDevice::new(memory.clone(), virtio_net_device)
.map_err(|_| Error::VirtioDevice)?;
let bars = virtio_pci_device
.allocate_bars(allocator)
.map_err(Error::AllocateBars)?;
for (event, addr, _) in virtio_pci_device.ioeventfds() {
let io_addr = IoEventAddress::Mmio(addr);
vm_fd
.register_ioevent(event.as_raw_fd(), &io_addr, NoDatamatch)
.map_err(Error::RegisterIoevent)?;
}
// Assign IRQ to the virtio-blk device
let irqfd = EventFd::new(EFD_NONBLOCK).map_err(Error::EventFd)?;
let irq_num = allocator.allocate_irq().ok_or(Error::AllocateIrq)?;
vm_fd
.register_irqfd(irqfd.as_raw_fd(), irq_num)
.map_err(Error::Irq)?;
// Let's use irq line INTA for now.
virtio_pci_device.assign_irq(irqfd, irq_num as u32, PciInterruptPin::IntA);
let virtio_pci_device = Arc::new(Mutex::new(virtio_pci_device));
pci_root
.add_device(virtio_pci_device.clone(), &mut mmio_bus, bars)
.map_err(Error::AddPciDevice)?;
DeviceManager::add_virtio_pci_device(
Box::new(virtio_net_device),
memory.clone(),
allocator,
vm_fd,
&mut pci_root,
&mut mmio_bus,
)?;
}
}
@ -408,6 +370,45 @@ impl DeviceManager {
})
}
fn add_virtio_pci_device(
virtio_device: Box<vm_virtio::VirtioDevice>,
memory: GuestMemoryMmap,
allocator: &mut SystemAllocator,
vm_fd: &VmFd,
pci_root: &mut PciRoot,
mmio_bus: &mut devices::Bus,
) -> Result<()> {
let mut virtio_pci_device =
VirtioPciDevice::new(memory, virtio_device).map_err(|_| Error::VirtioDevice)?;
let bars = virtio_pci_device
.allocate_bars(allocator)
.map_err(Error::AllocateBars)?;
for (event, addr, _) in virtio_pci_device.ioeventfds() {
let io_addr = IoEventAddress::Mmio(addr);
vm_fd
.register_ioevent(event.as_raw_fd(), &io_addr, NoDatamatch)
.map_err(Error::RegisterIoevent)?;
}
// Assign IRQ to the virtio-pci device
let irqfd = EventFd::new(EFD_NONBLOCK).map_err(Error::EventFd)?;
let irq_num = allocator.allocate_irq().ok_or(Error::AllocateIrq)?;
vm_fd
.register_irqfd(irqfd.as_raw_fd(), irq_num)
.map_err(Error::Irq)?;
// Let's use irq line INTA for now.
virtio_pci_device.assign_irq(irqfd, irq_num as u32, PciInterruptPin::IntA);
let virtio_pci_device = Arc::new(Mutex::new(virtio_pci_device));
pci_root
.add_device(virtio_pci_device.clone(), mmio_bus, bars)
.map_err(Error::AddPciDevice)?;
Ok(())
}
pub fn register_devices(&mut self) -> Result<()> {
// Insert serial device
self.io_bus