vmm: Fix clippy warnings on AArch64

Signed-off-by: Michael Zhao <michael.zhao@arm.com>

vmm/src/cpu.rs

@@ -1837,11 +1837,10 @@ mod tests {
         let hv = hypervisor::new().unwrap();
         let vm = hv.create_vm().unwrap();
         let vcpu = vm.create_vcpu(0, None).unwrap();
-        let mut regions = Vec::new();
+        let regions = vec![(
-        regions.push((
             GuestAddress(layout::RAM_64BIT_START),
             (layout::FDT_MAX_SIZE + 0x1000) as usize,
-        ));
+        )];
         let mem = GuestMemoryMmap::from_ranges(&regions).expect("Cannot initialize memory");
 
         let res = setup_regs(&vcpu, 0, 0x0, &mem);
@@ -1896,7 +1895,7 @@ mod tests {
             "Failed to get core register: Exec format error (os error 8)"
         );
 
-        let res = vcpu.set_core_registers(&mut state);
+        let res = vcpu.set_core_registers(&state);
         assert!(res.is_err());
         assert_eq!(
             format!("{}", res.unwrap_err()),
@@ -1936,7 +1935,7 @@ mod tests {
             id: MPIDR_EL1,
             addr: 0x00,
         });
-        let res = vcpu.set_system_registers(&mut state);
+        let res = vcpu.set_system_registers(&state);
         assert!(res.is_err());
         assert_eq!(
             format!("{}", res.unwrap_err()),

vmm/src/interrupt.rs

@@ -469,8 +469,7 @@ mod tests {
         let _ = vm.create_vcpu(0, None).unwrap();
         let gic = create_gic(&vm, 1).expect("Cannot create gic");
 
-        let mut gicr_typer = Vec::new();
+        let gicr_typer = vec![123];
-        gicr_typer.push(123);
         let res = get_redist_regs(gic.device(), &gicr_typer);
         assert!(res.is_ok());
         let state = res.unwrap();
@@ -487,8 +486,7 @@ mod tests {
         let _ = vm.create_vcpu(0, None).unwrap();
         let gic = create_gic(&vm, 1).expect("Cannot create gic");
 
-        let mut gicr_typer = Vec::new();
+        let gicr_typer = vec![123];
-        gicr_typer.push(123);
         let res = get_icc_regs(gic.device(), &gicr_typer);
         assert!(res.is_ok());
         let state = res.unwrap();

vmm/src/vm.rs

@@ -2461,10 +2461,10 @@ mod tests {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::{GuestMemoryMmap, GuestRegionMmap};
+    use crate::GuestMemoryMmap;
     use arch::aarch64::fdt::create_fdt;
     use arch::aarch64::gic::kvm::create_gic;
-    use arch::aarch64::{layout, DeviceInfoForFdt};
+    use arch::aarch64::layout;
     use arch::{DeviceType, MmioDeviceInfo};
     use vm_memory::GuestAddress;
 
@@ -2472,11 +2472,10 @@ mod tests {
 
     #[test]
     fn test_create_fdt_with_devices() {
-        let mut regions = Vec::new();
+        let regions = vec![(
-        regions.push((
             GuestAddress(layout::RAM_64BIT_START),
             (layout::FDT_MAX_SIZE + 0x1000) as usize,
-        ));
+        )];
         let mem = GuestMemoryMmap::from_ranges(&regions).expect("Cannot initialize memory");
 
         let dev_info: HashMap<(DeviceType, std::string::String), MmioDeviceInfo> = [
@@ -2489,15 +2488,12 @@ mod tests {
             ),
             (
                 (DeviceType::Virtio(1), "virtio".to_string()),
-                MmioDeviceInfo {
+                MmioDeviceInfo { addr: LEN, irq: 34 },
-                    addr: 0x00 + LEN,
-                    irq: 34,
-                },
             ),
             (
                 (DeviceType::Rtc, "rtc".to_string()),
                 MmioDeviceInfo {
-                    addr: 0x00 + 2 * LEN,
+                    addr: 2 * LEN,
                     irq: 35,
                 },
             ),