Whenever a virtio reset happens, the vhost-user backend should be
notified that the vring should be stopped. This is performed by calling
GET_VRING_BASE on the appropriate queue indexes.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Rather than relying on the amount of queues to enable or disable the
queue that have been activated, we rely on the actual queue indexes
provided through the tuple including the queue index, the Queue and the
EventFd. By storing the list of indexes, we simplify the code and also
make it more accurate in case some queues aren't activated.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of passing separately a list of Queues and the equivalent list
of EventFds, we consolidate these two through a tuple along with the
queue index.
The queue index can be very useful if looking for the actual index
related to the queue, no matter if other queues have been enabled or
not.
It's also convenient to have the EventFd associated with the Queue so
that we don't have to carry two lists with the same amount of items.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When preparing the activator, we must provide the correct queue index to
clone the right EventFd associated with the queue.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
It's not mandatory for the virtio-fs driver to enable all virtqueues
provided by the backend since all it needs is one request queue to work
correctly. Therefore we lower the minimal amount of enabled queues to 1.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
And along with virtio-queue, we must also bump vhost-user-backend from
0.3.0 to 0.5.0 (since it relies on virtio-queue 0.4.0).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The vhost-user backend was always provided the maximum queue size but
this is incorrect. Instead it must be informed of the actual queue size
that has been negotiated with the virtio driver running in the guest.
This ensures proper functioning of vhost-user-block with the Rust
Hypervisor Firmware, which uses a hardcoded queue size of 16.
Partially fixes#4285
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The latest vhost-user specification describes VHOST_USER_RESET_OWNER
command as deprecated with the following explanation:
This is no longer used. Used to be sent to request disabling all
rings, but some back-ends interpreted it to also discard connection
state (this interpretation would lead to bugs). It is recommended that
back-ends either ignore this message, or use it to disable all rings.
Also, it's been observed that when using either Rust Hypervisor Firmware
or EDK2 OVMF firmware with SPDK (using the block device as the boot
disk), the virtio reset that happens when the firmware no longer needs
to access the block device caused a failure by triggering the command
VHOST_USER_RESET_OWNER.
For all these reasons, this patch simplifies the virtio reset
implementation by simply disabling the virtqueues and no longer calling
into VHOST_USER_RESET_OWNER.
Partially fixes#4285
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This check is new in the beta version of clippy and exists to avoid
potential deadlocks by highlighting when the test in an if or for loop
is something that holds a lock. In many cases we would need to make
significant refactorings to be able to pass this check so disable in the
affected crates.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
warning: accessing first element with `data.get(0)`
--> virtio-devices/src/transport/pci_device.rs:1055:34
|
1055 | if let Some(v) = data.get(0) {
| ^^^^^^^^^^^ help: try: `data.first()`
|
= note: `#[warn(clippy::get_first)]` on by default
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
warning: you are deriving `PartialEq` and can implement `Eq`
--> vmm/src/serial_manager.rs:59:30
|
59 | #[derive(Debug, Clone, Copy, PartialEq)]
| ^^^^^^^^^ help: consider deriving `Eq` as well: `PartialEq, Eq`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#derive_partial_eq_without_eq
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to ensure that the virtio device thread is spawned from the vmm
thread we use an asynchronous activation mechanism for the virtio
devices. This change optimises that code so that we do not need to
iterate through all virtio devices on the platform in order to find the
one that requires activation. We solve this by creating a separate short
lived VirtioPciDeviceActivator that holds the required state for the
activation (e.g. the clones of the queues) this can then be stored onto
the device manager ready for asynchronous activation.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This reverts commit f160572f9d.
There has been increased flakiness around the live migration tests since
this was merged. Speculatively reverting to see if there is increased
stability.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to ensure that the virtio device thread is spawned from the vmm
thread we use an asynchronous activation mechanism for the virtio
devices. This change optimises that code so that we do not need to
iterate through all virtio devices on the platform in order to find the
one that requires activation. We solve this by creating a separate short
lived VirtioPciDeviceActivator that holds the required state for the
activation (e.g. the clones of the queues) this can then be stored onto
the device manager ready for asynchronous activation.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Latest cargo beta version raises warnings about unused macro rules.
Simply remove them to fix the beta build.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
There is no need to include serde_derive separately,
as it can be specified as serde feature instead.
Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>
Rely on the newly added helper from vm-virtio crate to keep cloning the
list of Queue structures.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Improve the request parsing/handling code by allowing an error status to
be returned back to the guest driver before we return an error
internally.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Extend the Domain structure to store the information about each domain
being in bypass mode or not. Based on this new information, the address
translation of the virtio devices is performed according to the bypass
mode of each domain. And both MAP/UNMAP requests are generating errors
in case the domain has been previously set to bypass mode.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for associating more than mappings with a domain, we
factorize the list of mappings associated with a domain behind a
dedicated Domain structure. We also update the field name so that it
reads better in the code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Exposing the VIRTIO_IOMMU_F_BYPASS_CONFIG feature to the guest, which
allows to update the bypass global knob through virtio configuration.
Based on the value of this global knob, the address translations for
endpoints that have not been added to a domain is allowed with a simple
identity mapping.
By default, we enable the bypass mode for all endpoints that are not
attached to any domain.
Fixes#3987
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the VIRTIO specification, we must be able to support multiple
endpoints per domain. This is fixed along with the introduction of some
simplification regarding how we can retrieve the external mapping
directly based on the endpoint.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If the guest has not activated the virtio-mem device then reject an
attempt to resize using it.
Fixes: #4001
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Instead of defining some very generic resources as PioAddressRange or
MmioAddressRange for each PCI BAR, let's move to the new Resource type
PciBar in order to make things clearer. This allows the code for being
more readable, but also removes the need for hard assumptions about the
MMIO and PIO ranges. PioAddressRange and MmioAddressRange types can be
used to describe everything except PCI BARs. BARs are very special as
they can be relocated and have special information we want to carry
along with them.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to make the code more consistent and easier to read, we remove
the former tuple that was used to describe a BAR, replacing it with the
existing structure PciBarConfiguration.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The code was quite unclear regarding the type of index that was being
used regarding a BAR. This is improved by differenciating register
indexes and BAR indexes more clearly.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By adding a new method id() to the PciDevice trait, we allow the caller
to retrieve a unique identifier. This is used in the context of BAR
relocation to identify the device being relocated, so that we can update
the DeviceTree resources for all PCI devices (and not only
VirtioPciDevice).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Updating the way of restoring BAR addresses for virtio-pci by providing
a more generic approach that will be reused for other PciDevice
implementations (i.e VfioPcidevice and VfioUserPciDevice).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Rust 2021 edition has a few improvements over the 2018 edition. Migrate
the project to 2021 edition by following recommended migration steps.
Luckily, the code itself doesn't require fixing.
Bump MSRV to 1.56 as it is required by the 2021 edition. Also fix the
clap build dependency to make Cloud Hypervisor build again.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
