27 lines
634 B
Rust
27 lines
634 B
Rust
pub mod model_specific_registers {
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use core::arch::x86_64::__cpuid;
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use spin::Lazy;
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use x86_64::registers::model_specific::Msr;
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const _CPUID_FLAG_MSR: u32 = 1 << 5;
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static _EDX: Lazy<u32> = Lazy::new(|| unsafe { __cpuid(1).edx });
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pub fn _cpu_has_msr() -> bool {
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*_EDX & _CPUID_FLAG_MSR != 0
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}
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pub fn cpu_get_msr(msr: u32, value: &mut u64) {
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let msr = Msr::new(msr);
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unsafe {
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*value = msr.read();
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}
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}
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pub fn cpu_set_msr(msr: u32, value: u64) {
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let mut msr = Msr::new(msr);
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unsafe {
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msr.write(value);
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}
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}
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}
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