Function get_cache_shared

arch/src/aarch64/fdt.rs:176–204

NOTE: shared_cpu_list file directory example, "/sys/devices/system/cpu/cpu0/cache/index0/shared_cpu_list".

(cache_level: CacheLevel)

/// NOTE: shared_cpu_list file directory example,
/// "/sys/devices/system/cpu/cpu0/cache/index0/shared_cpu_list".
pub fn get_cache_shared(cache_level: CacheLevel) -> bool {
    let mut file_directory: String = "/sys/devices/system/cpu/cpu0/cache".to_string();
    let mut result = true;

    match cache_level {
        CacheLevel::L1D | CacheLevel::L1I => result = false,
        CacheLevel::L2 => file_directory += "/index2/shared_cpu_list",
        CacheLevel::L3 => file_directory += "/index3/shared_cpu_list",
    }

    if !result {
        return false;
    }

    let file_path = Path::new(&file_directory);
    if file_path.exists() {
        let src = fs::read_to_string(file_directory).expect("File not exists or file corrupted.");
        let src = src.trim();
        if src.is_empty() {
            result = false;
        } else {
            result = src.contains('-') || src.contains(',');
        }
    } else {
        result = false;
    }

    result
}

/// Creates the flattened device tree for this aarch64 VM.
#[allow(clippy::too_many_arguments)]