misc: cleanup &Arc<dyn T> -> &dyn T

Consuming `&Arc<T>` as argument is almost always an antipattern as it
hides whether the callee is going to take over (shared) ownership
(by .clone()) or not. Instead, it is better to consume `&dyn T` or
`Arc<dyn T>` to be more explicit. This commit cleans up the code.

The change is very mechanic and was very easy to implement across the
code base.

Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
On-behalf-of: SAP philipp.schuster@sap.com

hypervisor/src/cpu.rs

@@ -10,9 +10,6 @@
 //
 //
 
-#[cfg(target_arch = "aarch64")]
-use std::sync::Arc;
-
 use thiserror::Error;
 #[cfg(not(target_arch = "riscv64"))]
 use vm_memory::GuestAddress;
@@ -473,7 +470,7 @@ pub trait Vcpu: Send + Sync {
     #[cfg(target_arch = "aarch64")]
     fn vcpu_set_processor_features(
         &self,
-        vm: &Arc<dyn crate::Vm>,
+        vm: &dyn crate::Vm,
         kvi: &mut VcpuInit,
         id: u32,
     ) -> Result<()>;

hypervisor/src/kvm/mod.rs

@@ -2098,7 +2098,7 @@ impl cpu::Vcpu for KvmVcpu {
     #[cfg(target_arch = "aarch64")]
     fn vcpu_set_processor_features(
         &self,
-        vm: &Arc<dyn crate::Vm>,
+        vm: &dyn crate::Vm,
         kvi: &mut crate::VcpuInit,
         id: u32,
     ) -> cpu::Result<()> {

hypervisor/src/mshv/mod.rs

@@ -1306,7 +1306,7 @@ impl cpu::Vcpu for MshvVcpu {
     #[cfg(target_arch = "aarch64")]
     fn vcpu_set_processor_features(
         &self,
-        _vm: &Arc<dyn crate::Vm>,
+        _vm: &dyn crate::Vm,
         _kvi: &mut crate::VcpuInit,
         _id: u32,
     ) -> cpu::Result<()> {