The way the code is currently implemented, only by writing to STDIN a
user can trigger some input to reach the VM through virtio-console. But
in case, there were not enough virtio descriptors to process what was
retrieved from STDIN, the remaining bits would be transferred only if
STDIN was triggered again. The missing part is that when some
descriptors are made available from the guest, the virtio-console device
should try to send any possible remaining bits.
By triggering the function process_input_queue() whenever the guest
notifies the host that some new descriptors are ready for the receive
queue, this patch allows to fill the implementation void that was left.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In case the virtio descriptor is pulled out of the Queue iterator, it
is important to fill it and tag it as used. This is already done from
the successful code path, but in case there's an error during the
filling, we should make sure to put the descriptor back in the list of
available descriptors. This way, when the error occurs, we don't loose
a descriptor, and it could be used later.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The existing code was a bit too complex and it was introducing a bug
when trying to paste long lines directly to the console. By simplifying
the code, and by doing proper usage of the drain() function, the bug is
fixed by this commit.
Here is the similar output one could have gotten from time to time, when
pasting important amounts of bytes:
ERROR:vm-virtio/src/console.rs:104 -- Failed to write slice:
InvalidGuestAddress(GuestAddress(1040617472))
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The virtio-fs messages coming from the slave can contain multiple
mappings (up to 8) through one single request. By implementing such
feature, the virtio-fs implementation of cloud-hypervisor is optimal and
fully functional as it resolves a bug that was seen when running fio
testing without this patch.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By implementing this virtio feature, we let the virtio-iommu driver call
the device backend so that it can probe each device that gets attached.
Through this probing, the device provides a range of reserved memory
related to MSI. This is mandatory for x86 architecture as we want to
avoid the default MSI range assigned by the virtio-iommu driver if no
range is provided at all. The default range is 0x8000000-0x80FFFFF but
it only makes sense for ARM architectures.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The following commit broke this unit test:
"""
vmm: Convert virtio devices to Arc<Mutex<T>>
Migratable devices can be virtio or legacy devices.
In any case, they can potentially be tracked through one of the IO bus
as an Arc<Mutex<dyn BusDevice>>. In order for the DeviceManager to also
keep track of such devices as Migratable trait objects, they must be
shared as mutable atomic references, i.e. Arc<Mutex<T>>. That forces all
Migratable objects to be tracked as Arc<Mutex<dyn Migratable>>.
Virtio devices are typically migratable, and thus for them to be
referenced by the DeviceManager, they now should be built as
Arc<Mutex<VirtioDevice>>.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
"""
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows us to change the memory map that is being used by the
devices via an atomic swap (by replacing the map with another one). The
ArcSwap provides the mechanism for atomically swapping from to another
whilst still giving good read performace. It is inside an Arc so that we
can use a single ArcSwap for all users.
Not covered by this change is replacing the GuestMemoryMmap itself.
This change also removes some vertical whitespace from use blocks in the
files that this commit also changed. Vertical whitespace was being used
inconsistently and broke rustfmt's behaviour of ordering the imports as
it would only do it within the block.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This patch has been cherry-picked from the Firecracker tree. The
reference commit is 1db04ccc69862f30b7814f30024d112d1b86b80e.
Changed the host-initiated vsock connection protocol to include a
trivial handshake.
The new protocol looks like this:
- [host] CONNECT <port><LF>
- [guest/success] OK <assigned_host_port><LF>
On connection failure, the host host connection is reset without any
accompanying message, as before.
This allows host software to more easily detect connection failures, for
instance when attempting to connect to a guest server that may have not
yet started listening for client connections.
Signed-off-by: Dan Horobeanu <dhr@amazon.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The vsock packets that we're building are resolving guest addresses to
host ones and use the latter as raw pointers.
If the corresponding guest mapped buffer spans across several regions in
the guest, they will do so in the host as well. Since we have no
guarantees that host regions are contiguous, it may lead the VMM into
trying to access memory outside of its memory space.
For now we fix that by ensuring that the guest buffers do not span
across several regions. If they do, we error out.
Ideally, we should enhance the rust-vmm memory model to support safe
acces across host regions.
Fixes CVE-2019-18960
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Due to the amount of code currently duplicated across vhost-user devices,
the stats for this commit is on the large side but it's mostly more
duplicated code, unfortunately.
Migratable and Snapshotable placeholder implementations are provided as
well, making all vhost-user devices Migratable.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Due to the amount of code currently duplicated across virtio devices,
the stats for this commit is on the large side but it's mostly more
duplicated code, unfortunately.
Migratable and Snapshotable placeholder implementations are provided as
well, making all virtio devices Migratable.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Migratable devices can be virtio or legacy devices.
In any case, they can potentially be tracked through one of the IO bus
as an Arc<Mutex<dyn BusDevice>>. In order for the DeviceManager to also
keep track of such devices as Migratable trait objects, they must be
shared as mutable atomic references, i.e. Arc<Mutex<T>>. That forces all
Migratable objects to be tracked as Arc<Mutex<dyn Migratable>>.
Virtio devices are typically migratable, and thus for them to be
referenced by the DeviceManager, they now should be built as
Arc<Mutex<VirtioDevice>>.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
The signal handling for vCPU signals has changed in the latest release
so switch to the new API.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Since the kvm crates now depend on vmm-sys-util, the bump must be
atomic.
The kvm-bindings and ioctls 0.2.0 and 0.4.0 crates come with a few API
changes, one of them being the use of a kvm_ioctls specific error type.
Porting our code to that type makes for a fairly large diff stat.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
In order to iterate over a chain of descriptor chains, this code has
been ported over from crosvm, based on the commit
961461350c0b6824e5f20655031bf6c6bf6b7c30.
The main modification compared to the original code is the way the
sorting between readable and writable descriptors happens.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Update micro_http create to allow set content type.
Suggested-by: Samuel Ortiz <sameo@linux.intel.com>
Tested-by: Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>
Signed-off-by: Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>
In order to group together some functions that can be shared across
virtio transport layers, this commit introduces a new trait called
VirtioTransport.
The first function of this trait being ioeventfds() as it is needed from
both virtio-mmio and virtio-pci devices, represented by MmioDevice and
VirtioPciDevice structures respectively.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We need to rely on the latest kvm-ioctls version to benefit from the
recent addition of unregister_ioevent(), allowing us to detach a
previously registered eventfd to a PIO or MMIO guest address.
Because of this update, we had to modify the current constraint we had
on the vmm-sys-util crate, using ">= 0.1.1" instead of being strictly
tied to "0.2.0".
Once the dependency conflict resolved, this commit took care of fixing
build issues caused by recent modification of kvm-ioctls relying on
EventFd reference instead of RawFd.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The specific part of PCI BAR reprogramming that happens for a virtio PCI
device is the update of the ioeventfds addresses KVM should listen to.
This should not be triggered for every BAR reprogramming associated with
the virtio device since a virtio PCI device might have multiple BARs.
The update of the ioeventfds addresses should only happen when the BAR
related to those addresses is being moved.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The PciDevice trait is supposed to describe only functions related to
PCI. The specific method ioeventfds() has nothing to do with PCI, but
instead would be more specific to virtio transport devices.
This commit removes the ioeventfds() method from the PciDevice trait,
adding some convenient helper as_any() to retrieve the Any trait from
the structure behing the PciDevice trait. This is the only way to keep
calling into ioeventfds() function from VirtioPciDevice, so that we can
still properly reprogram the PCI BAR.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the value being written to the BAR, the implementation can
now detect if the BAR is being moved to another address. If that is the
case, it invokes move_bar() function from the DeviceRelocation trait.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the type of BAR, we can now provide the correct address related
to a BAR index provided by the caller.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to speed up the boot time and reduce the amount of mappings,
this patch exposes the virtio-iommu device as supporting both 2M and 4k
page sizes.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This patch relies on the trait implementation provided for each device
which requires some sort of external update based on a map or unmap.
Whenever a MAP or UNMAP request comes through the virtqueues, it
triggers a call to the external mapping trait with map()/unmap()
functions being invoked.
Those external mappings are meant to be used from VFIO and vhost-user
devices as they need to update their own mappings. In case of VFIO, the
goal is to update the DMAR table in the physical IOMMU, while vhost-user
devices needs to update their internal representation of the virtqueues.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This patch introduces the first implementation of the virtio-iommu
device. This device emulates an IOMMU for the guest, which allows
special use cases like nesting passed through devices, or even using
IOVAs from the guest.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In case some virtio devices are attached to the virtual IOMMU, their
vring addresses need to be translated from IOVA into GPA. Otherwise it
makes no sense to try to access them, and they would cause out of range
errors.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding virtio feature VIRTIO_F_IOMMU_PLATFORM when explicitly asked by
the user. The need for this feature is to be able to attach the virtio
device to a virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding virtio feature VIRTIO_F_IOMMU_PLATFORM when explicitly asked by
the user. The need for this feature is to be able to attach the virtio
device to a virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding virtio feature VIRTIO_F_IOMMU_PLATFORM when explicitly asked by
the user. The need for this feature is to be able to attach the virtio
device to a virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding virtio feature VIRTIO_F_IOMMU_PLATFORM when explicitly asked by
the user. The need for this feature is to be able to attach the virtio
device to a virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding virtio feature VIRTIO_F_IOMMU_PLATFORM when explicitly asked by
the user. The need for this feature is to be able to attach the virtio
device to a virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding virtio feature VIRTIO_F_IOMMU_PLATFORM when explicitly asked by
the user. The need for this feature is to be able to attach the virtio
device to a virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The virtio specification defines a device can be reset, which was not
supported by this vhost-user-fs implementation. The reason it is needed
is to support unbinding this device from the guest driver, and rebind it
to vfio-pci driver.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The virtio specification defines a device can be reset, which was not
supported by this vhost-user-net implementation. The reason it is needed
is to support unbinding this device from the guest driver, and rebind it
to vfio-pci driver.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The virtio specification defines a device can be reset, which was not
supported by this virtio-console implementation. The reason it is needed
is to support unbinding this device from the guest driver, and rebind it
to vfio-pci driver.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The virtio specification defines a device can be reset, which was not
supported by this virtio-vsock implementation. The reason it is needed
is to support unbinding this device from the guest driver, and rebind
it to vfio-pci driver.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The virtio specification defines a device can be reset, which was not
supported by this virtio-pmem implementation. The reason it is needed
is to support unbinding this device from the guest driver, and rebind
it to vfio-pci driver.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The virtio specification defines a device can be reset, which was not
supported by this virtio-rng implementation. The reason it is needed
is to support unbinding this device from the guest driver, and rebind
it to vfio-pci driver.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The virtio specification defines a device can be reset, which was not
supported by this virtio-net implementation. The reason it is needed is
to support unbinding this device from the guest driver, and rebind it to
vfio-pci driver.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
While implement vhost-user-net backend with Tap interface, it keeps
failed to enable the tx vring, since there is a checking in
slave_req_handler.rs to require acked_protocol_features to be setup
as a pre-requirement, which is filled by set_protocol_features call.
Add this call in vhost-user-net device implementation to address the issue.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
The purpose of this new crate is to provide a common library to all
vhost-user backend implementations. The more is handled by this library,
the less duplication will need to happen in each vhost-user daemon.
This crate relies a lot on vhost_rs, vm-memory and vm-virtio crates.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The vhost-user implementation was always passing the maximum size
supported by the virtqueues to the backend, but this is obviously wrong
as it must pass the size being set by the driver running in the guest.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The 32 or 64 bits type for the memory BAR was not set correctly. This
patch ensure the right type is applied to the BAR.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
