Struct x86_64::msr::MsrEmulateHandler

struct MsrEmulateHandler {
    msr_data: u64,
}

MsrPassthroughHandler - emulate handler that will handle RDMSR/WRMSR with a dummy MSR value other than access to real MSR. This Handler will initialize a value(msr_data) with the corresponding Host MSR value, then handle the RDMSR/WRMSR based on this “value”.

For RDMSR, this handler will give Guest the stored msr_data. For WRMSR, this handler will directly change msr_data without the modification on real Host MSR. The change will not take effect on the real MSR of Host.

‘emulate’ Handler is used in the case, that some driver need to control MSR and user just wants to make WRMSR successful and doesn’t care about if WRMSR really works. This handlers make Guest’s control of CPU not affect the host

Fields

msr_data: u64

Only initialize msr_data with MSR source pCPU, and will not update msr value changes on host cpu into msr_data.

Implementations

impl MsrEmulateHandler

fn new(
    index: u32,
    msr_config: &MsrConfig,
    msr_file: &Rc<RefCell<BTreeMap<usize, Rc<MsrDevFile>>>>
) -> Result<Self>

Trait Implementations

impl MsrHandling for MsrEmulateHandler

fn read(&self) -> Result<u64>

fn write(&mut self, data: u64) -> Result<()>