IOAPIC, a X86 specific interrupt controller, is referenced by device
manager and CPU manager. To work with more architectures, a common
type for all architectures is needed.
This commit introduces trait InterruptController to provide architecture
agnostic functions. Device manager and CPU manager can use it without
caring what the underlying device is.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
This identifier is chosen from the DeviceManager so that it will manage
all identifiers across the VM, which will ensure uniqueness.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Having the InterruptManager trait depend on an InterruptType forces
implementations into supporting potentially very different kind of
interrupts from the same code base. What we're defining through the
current, interrupt type based create_group() method is a need for having
different interrupt managers for different kind of interrupts.
By associating the InterruptManager trait to an interrupt group
configuration type, we create a cleaner design to support that need as
we're basically saying that one interrupt manager should have the single
responsibility of supporting one kind of interrupt (defined through its
configuration).
Signed-off-by: Samuel Ortiz <sameo@linux.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>
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 avoid introducing a dependency on arch in the devices crate
pass the constant in to the IOAPIC device creation.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Latest clippy version complains about our existing code for the
following reasons:
- trait objects without an explicit `dyn` are deprecated
- `...` range patterns are deprecated
- lint `clippy::const_static_lifetime` has been renamed to
`clippy::redundant_static_lifetimes`
- unnecessary `unsafe` block
- unneeded return statement
All these issues have been fixed through this patch, and rustfmt has
been run to cleanup potential formatting errors due to those changes.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
With the range base for the IO/MMIO vm exit address, a device with
multiple ranges has all the needed information for resolving which of
its range the exit is coming from
Fixes: #87
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
The goal for cloud-hypervisor is to keep the host safe. With this in
mind, we want to emulate as much as possible in userspace instead of
in kernel directly.
The IOAPIC is a good candidate to move from kernel to userspace, which
is why this commit introduces a userspace implementation of the IOAPIC
82093AA based on the documentation:
https://pdos.csail.mit.edu/6.828/2016/readings/ia32/ioapic.pdf
This code is inspired from the files devices/src/ioapic.rs and
devices/src/split_irqchip_common.rs from the crosvm codebase. The
reference version used being 6c1e23eee3065b3f3d6fc4fb992ac9884dbabf68.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
