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vmm: Implement DeviceRelocation trait

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By implementing the DeviceRelocation trait for the AddressManager
structure, we now have a way to let the PCI BAR reprogramming happen.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2019-10-28 09:53:13 -07:00 committed by Samuel Ortiz
parent 4f8054fa82
commit e93467a96c
1 changed files with 81 additions and 2 deletions
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83
vmm/src/device_manager.rs
View File

@ -21,8 +21,8 @@ use libc::{EFD_NONBLOCK, TIOCGWINSZ};
use net_util::Tap;
#[cfg(feature = "pci_support")]
use pci::{
InterruptDelivery, InterruptParameters, PciBus, PciConfigIo, PciConfigMmio, PciDevice,
PciInterruptPin, PciRoot,
DeviceRelocation, InterruptDelivery, InterruptParameters, PciBarRegionType, PciBus,
PciConfigIo, PciConfigMmio, PciDevice, PciInterruptPin, PciRoot,
};
use qcow::{self, ImageType, QcowFile};
@ -274,6 +274,83 @@ struct AddressManager {
allocator: Arc<Mutex<SystemAllocator>>,
io_bus: Arc<devices::Bus>,
mmio_bus: Arc<devices::Bus>,
#[cfg(feature = "pci_support")]
vm_fd: Arc<VmFd>,
}
#[cfg(feature = "pci_support")]
impl DeviceRelocation for AddressManager {
fn move_bar(
&self,
old_base: u64,
new_base: u64,
len: u64,
pci_dev: &mut dyn PciDevice,
region_type: PciBarRegionType,
) {
match region_type {
PciBarRegionType::IORegion => {
// Update system allocator
self.allocator
.lock()
.unwrap()
.free_io_addresses(GuestAddress(old_base), len as GuestUsize);
self.allocator
.lock()
.unwrap()
.allocate_io_addresses(Some(GuestAddress(new_base)), len as GuestUsize, None)
.unwrap();
// Update PIO bus
self.io_bus
.update_range(old_base, len, new_base, len)
.unwrap();
}
PciBarRegionType::Memory32BitRegion | PciBarRegionType::Memory64BitRegion => {
// Update system allocator
self.allocator
.lock()
.unwrap()
.free_mmio_addresses(GuestAddress(old_base), len as GuestUsize);
if region_type == PciBarRegionType::Memory32BitRegion {
self.allocator
.lock()
.unwrap()
.allocate_mmio_hole_addresses(
Some(GuestAddress(new_base)),
len as GuestUsize,
None,
)
.unwrap();
} else {
self.allocator
.lock()
.unwrap()
.allocate_mmio_addresses(
Some(GuestAddress(new_base)),
len as GuestUsize,
None,
)
.unwrap();
}
// Update MMIO bus
self.mmio_bus
.update_range(old_base, len, new_base, len)
.unwrap();
}
}
for (event, addr, _) in pci_dev.ioeventfds() {
let io_addr = IoEventAddress::Mmio(addr);
self.vm_fd
.register_ioevent(event.as_raw_fd(), &io_addr, NoDatamatch)
.unwrap();
}
pci_dev.move_bar(old_base, new_base);
}
}
pub struct DeviceManager {
@ -452,6 +529,8 @@ impl DeviceManager {
allocator: Arc::new(Mutex::new(allocator)),
io_bus: Arc::new(io_bus),
mmio_bus: Arc::new(mmio_bus),
#[cfg(feature = "pci_support")]
vm_fd: vm_info.vm_fd.clone(),
});
if cfg!(feature = "pci_support") {