Function is_system_register

hypervisor/src/kvm/aarch64/mod.rs:67–80

Specifies whether a particular register is a system register or not. The kernel splits the registers on aarch64 in core registers and system registers. So, below we get the system registers by checking that they are not core registers. # Arguments `regid` - The index of the register we are checking.

(regid: u64)

///
/// * `regid` - The index of the register we are checking.
pub fn is_system_register(regid: u64) -> bool {
    if (regid & KVM_REG_ARM_COPROC_MASK as u64) == KVM_REG_ARM_CORE as u64 {
        return false;
    }

    let size = regid & KVM_REG_SIZE_MASK;

    assert!(
        !(size != KVM_REG_SIZE_U32 && size != KVM_REG_SIZE_U64),
        "Unexpected register size for system register {size}"
    );

    true
}

pub fn check_required_kvm_extensions(kvm: &Kvm) -> KvmResult<()> {
    macro_rules! check_extension {