20 lines
470 B
Rust
20 lines
470 B
Rust
|
use x86_64::registers::model_specific::Msr;
|
||
|
|
|
||
|
|
const MSR_MISC_FEATURE8CONTROL: u32 = 0x1a4;
|
||
|
|
|
||
|
|
pub fn prefetcher_status() -> bool {
|
||
|
|
let msr = Msr::new(MSR_MISC_FEATURE8CONTROL);
|
||
|
|
let value = unsafe { msr.read() };
|
||
|
|
|
||
|
|
value & 0xf != 0xf
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn enable_prefetchers(status: bool) {
|
||
|
|
let mut msr = Msr::new(MSR_MISC_FEATURE8CONTROL);
|
||
|
|
let mut value = unsafe { msr.read() } & !0xf;
|
||
|
|
if !status {
|
||
|
|
value |= 0xf;
|
||
|
|
}
|
||
|
|
unsafe { msr.write(value) };
|
||
|
|
}
|