Move GED device reporting of required device type to scan into an MMIO
region rather than an I/O port.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Rather than have the MemoryManager device sit on the I/O bus allocate
space for MMIO and add it to the MMIO bus.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit relies on the interrupt manager and the resulting interrupt
source group to abstract the knowledge about KVM and how interrupts are
updated and delivered.
This allows the entire "devices" crate to be freed from kvm_ioctls and
kvm_bindings dependencies.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The interrupt manager is passed to the IOAPIC creation, and the IOAPIC
now creates an InterruptSourceGroup for MSI interrupts based on it.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By introducing a new InterruptManager dedicated to the IOAPIC, we don't
have to solve the chicken and eggs problem about which of the
InterruptManager or the Ioapic should be created first. It's also
totally fine to have two interrupt manager instances as they both share
the same list of GSI routes and the same allocator.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
vhost_user_blk already has it, so it's only fair to give it to
virtio-blk too. Extend DiskConfig with a 'direct' property, honor
it while opening the file backing the disk image, and pass it to
vm_virtio::RawFile.
Fixes#631
Signed-off-by: Sergio Lopez <slp@redhat.com>
vhost_user_blk already has it, so it's only fair to give it to
virtio-blk too. Extend DiskConfig with a 'readonly' properly, and pass
it to vm_virtio::Block.
Signed-off-by: Sergio Lopez <slp@redhat.com>
The build is run against "--all-features", "pci,acpi", "pci" and "mmio"
separately. The clippy validation must be run against the same set of
features in order to validate the code is correct.
Because of these new checks, this commit includes multiple fixes
related to the errors generated when manually running the checks.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
There's no need for assign_irq() or assign_msix() functions from the
PciDevice trait, as we can see it's never used anywhere in the codebase.
That's why it's better to remove these methods from the trait, and
slightly adapt the existing code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since the InterruptManager is never stored into any structure, it should
be passed as a reference instead of being cloned.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit replaces the way legacy interrupts were handled with the
brand new implementation of the legacy InterruptSourceGroup for KVM.
Additionally, since it removes the last bit relying on the Interrupt
trait, the trait and its implementation can be removed from the
codebase.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit replaces the way legacy interrupts were handled with the
brand new implementation of the legacy InterruptSourceGroup for KVM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit replaces the way legacy interrupts were handled with the
brand new implementation of the legacy InterruptSourceGroup for KVM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Relying on the previous commits, the legacy interrupt implementation can
be completed. The IOAPIC handler is used to deliver the interrupt that
will be triggered through the trigger() method.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By having a reference to the IOAPIC, the KvmInterruptManager is going
to be able to initialize properly the legacy interrupt source group.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to be able to use the InterruptManager abstraction with
virtio-mmio devices, this commit introduces InterruptSourceGroup's
skeleton for legacy interrupts.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When KvmInterruptManager initializes a new InterruptSourceGroup, it's
only for PCI_MSI_IRQ case that it needs to allocate the GSI and create a
new InterruptRoute. That's why this commit moves the general code into
the specific use case.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When the base InterruptIndex is different from 0, the loop allocating
GSI and HashMap entries won't work as expected. The for loop needs to
start from base, but the limit must be base+count so that we allocate
a number of "count" entries.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to let the InterruptManager be shared across both PCI and MMIO
devices, this commit moves the initialization earlier in the code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
After refactoring a common function is used to setup these slots and
that function takes care of allocating a new slot so it is not necessary
to reserve the initial region slots.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Based on all the previous changes, we can at this point replace the
entire interrupt management with the implementation of InterruptManager
and InterruptSourceGroup traits.
By using KvmInterruptManager from the DeviceManager, we can provide both
VirtioPciDevice and VfioPciDevice a way to pick the kind of
InterruptSourceGroup they want to create. Because they choose the type
of interrupt to be MSI/MSI-X, they will be given a MsiInterruptGroup.
Both MsixConfig and MsiConfig are responsible for the update of the GSI
routes, which is why, by passing the MsiInterruptGroup to them, they can
still perform the GSI route management without knowing implementation
details. That's where the InterruptSourceGroup is powerful, as it
provides a generic way to manage interrupt, no matter the type of
interrupt and no matter which hypervisor might be in use.
Once the full replacement has been achieved, both SystemAllocator and
KVM specific dependencies can be removed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
After the skeleton of InterruptManager and InterruptSourceGroup traits
have been implemented, this new commit takes care of fully implementing
the content of KvmInterruptManager (InterruptManager trait) and
MsiInterruptGroup (InterruptSourceGroup).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit introduces an empty implementation of both InterruptManager
and InterruptSourceGroup traits, as a proper basis for further
implementation.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Callbacks are not the most Rust idiomatic way of programming. The right
way is to use a Trait to provide multiple implementation of the same
interface.
Additionally, a Trait will allow for multiple functions to be defined
while using callbacks means that a new callback must be introduced for
each new function we want to add.
For these two reasons, the current commit modifies the existing
VirtioInterrupt callback into a Trait of the same name.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Because MsixConfig will be responsible for updating KVM GSI routes at
some point, it is necessary that it can access the list of routes
contained by gsi_msi_routes.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Because MsixConfig will be responsible for updating the KVM GSI routes
at some point, it must have access to the VmFd to invoke the KVM ioctl
KVM_SET_GSI_ROUTING.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The point here is to let MsixConfig take care of the GSI allocation,
which means the SystemAllocator must be passed from the vmm crate all
the way down to the pci crate.
Once this is done, the GSI allocation and irq_fd creation is performed
by MsixConfig directly.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Because we will need to share the same list of GSI routes across
multiple PCI devices (virtio-pci, VFIO), this commit moves the creation
of such list to a higher level location in the code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Use RawFile as backend instead of File. This allows us to abstract
the access to the actual image with a specialized layer, so we have a
place where we can deal with the low-level peculiarities.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Doing I/O on an image opened with O_DIRECT requires to adhere to
certain restrictions, requiring the following elements to be aligned:
- Address of the source/destination memory buffer.
- File offset.
- Length of the data to be read/written.
The actual alignment value depends on various elements, and according
to open(2) "(...) there is currently no filesystem-independent
interface for an application to discover these restrictions (...)".
To discover such value, we iterate through a list of alignments
(currently, 512 and 4096) calling pread() with each one and checking
if the operation succeeded.
We also extend RawFile so it can be used as a backend for QcowFile,
so the later can be easily adapted to support O_DIRECT too.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Update the common part in net_util.rs under vm-virtio to add mq
support, meanwhile enable mq for virtio-net device, vhost-user-net
device and vhost-user-net backend. Multiple threads will be created,
one thread will be responsible to handle one queue pair separately.
To gain the better performance, it requires to have the same amount
of vcpus as queue pair numbers defined for the net device, due to
the cpu affinity.
Multiple thread support is not added for vhost-user-net backend
currently, it will be added in future.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Add num_queues and queue_size for virtio-net device to make them configurable,
while add the associated options in command line.
Update cloud-hypervisor.yaml with the new options for NetConfig.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Add support to allow VMMs to open the same tap device many times, it will
create multiple file descriptors meanwhile.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Since the common parts are put into net_util.rs under vm-virtio,
refactoring code for virtio-net device, vhost-user-net device
and backend to shrink the code size and improve readability
meanwhile.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Use independent bits for storing whether there is a CPU or memory device
changed when reporting changes via ACPI GED interrupt. This prevents a
later notification squashing an earlier one and ensure that hotplugging
both CPU and memory at the same time succeeds.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If a new amount of RAM is requested in the VmResize command try and
hotplug if it an increase (MemoryManager::Resize() silently ignores
decreases.)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If there is a GED interrupt and the field indicates that the memory
device has changed triggers a scan of the memory devices.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Generate and expose the DSDT table entries required to support memory
hotplug. The AML methods call into the MemoryManager via I/O ports
exposed as fields.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Expose the details of hotplug RAM slots via an I/O port. This will be
consumed by the ACPI DSDT tables to report the hotplug memory details to
the guest.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add a "resize()" method on MemoryManager which will create a new memory
allocation based on the difference between the desired RAM amount and
the amount already in use. After allocating the added RAM using the same
backing method as the boot RAM store the details in a vector and update
the KVM map and create a new GuestMemoryMmap and replace all the users.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
