This commit adds methods to save/restore AArch64 vCPU registers,
including:
1. The AArch64 `VcpuKvmState` structure.
2. Some `Vcpu` trait methods of the `KvmVcpu` structure to
enable the save/restore of the AArch64 vCPU states.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit ports code from firecracker and refactors the existing
AArch64 code as the preparation for implementing save/restore
AArch64 vCPU, including:
1. Modification of `arm64_core_reg` macro to retrive the index of
arm64 core register and implemention of a helper to determine if
a register is a system register.
2. Move some macros and helpers in `arch` crate to the `hypervisor`
crate.
3. Added related unit tests for above functions and macros.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Currently we don't need to do anything to service these exits but when
the synthetic interrupt controller is active an exit will be triggered
to notify the VMM of details of the synthetic interrupt page.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to move the hypervisor specific parts of the VM exit handling
path, we're defining a generic, hypervisor agnostic VM exit enum.
This is what the hypervisor's Vcpu run() call should return when the VM
exit can not be completely handled through the hypervisor specific bits.
For KVM based hypervisors, this means directly forwarding the IO related
exits back to the VMM itself. For other hypervisors that e.g. rely on the
VMM to decode and emulate instructions, this means the decoding itself
would happen in the hypervisor crate exclusively, and the rest of the VM
exit handling would be handled through the VMM device model implementation.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Fix test_vm unit test by using the new abstraction and dropping some
dead code.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Some vCPU states such as MP_STATE can be modified while retrieving
other states. For this reason, it's important to follow a specific
order that will ensure a state won't be modified after it has been
saved. Comments about ordering requirements have been copied over
from Firecracker commit 57f4c7ca14a31c5536f188cacb669d2cad32b9ca.
This patch also set the previously saved VCPU_EVENTS, as this was
missing from the restore codepath.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Initially the licensing was just Apache-2.0. This patch changes
the licensing to dual license Apache-2.0 OR BSD-3-Clause
Signed-off-by: Muminul Islam <muislam@microsoft.com>
Implement the vCPU state getter and setter separately from the initial
KVM Hypervisor trait implementation, mostly for readability purposes.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This Vcpu trait should be implemented by each underlying hypervisor.
Previously created hypervisor object should create the VM based on
already selected hypervisor and Vm object should create this vcpu
object based on same hyperviosr. Each of this object should be
referenced by trait object i.e <dyn Vcpu>.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
