[Test code] ARM64: Decrease sizes of some values

These values can be changed to smaller types without causing problems.

I've done this in a separate commit because my dev setup doesn't use
ARM. In case something ARM-specific breaks in CI, I'd like to be able to
keep those changes in their own commit so I can debug more easily.

Signed-off-by: Jonathan Browne <[email protected]>

Author: JBYoshi

src/vmm/src/arch/aarch64/mod.rs

@@ -129,7 +129,7 @@ mod tests {
         let regions = arch_memory_regions(1usize << 41);
         assert_eq!(1, regions.len());
         assert_eq!(GuestAddress(super::layout::DRAM_MEM_START), regions[0].0);
-        assert_eq!(super::layout::DRAM_MEM_MAX_SIZE, regions[0].1 as u64);
+        assert_eq!(super::layout::DRAM_MEM_MAX_SIZE, regions[0].1);
     }
 
     #[test]

src/vmm/src/arch/aarch64/regs.rs

@@ -779,7 +779,7 @@ mod tests {
         let bytes = 69_u64.to_le_bytes();
         let reg_ref = Aarch64RegisterRef::new(KVM_REG_SIZE_U64, &bytes);
 
-        assert_eq!(u64::from(reg_ref.size()), 8);
+        assert_eq!(reg_ref.size(), 8);
         assert_eq!(reg_ref.value::<u64, 8>(), 69);
     }
 
@@ -808,7 +808,7 @@ mod tests {
         let mut bytes = 69_u64.to_le_bytes();
         let mut reg_ref = Aarch64RegisterRefMut::new(KVM_REG_SIZE_U64, &mut bytes);
 
-        assert_eq!(u64::from(reg_ref.size()), 8);
+        assert_eq!(reg_ref.size(), 8);
         assert_eq!(reg_ref.value::<u64, 8>(), 69);
         reg_ref.set_value(reg_ref.value::<u64, 8>() + 1);
         assert_eq!(reg_ref.value::<u64, 8>(), 70);