WriteMsr64.c

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#include <Library/RegisterFilterLib.h>
 
UINT64
EFIAPI
AsmWriteMsr64 (
  IN UINT32  Index,
  IN UINT64  Value
  )
{
  BOOLEAN  Flag;
 
  Flag = FilterBeforeMsrWrite (Index, &Value);
  if (Flag) {
    _asm {
      mov     edx, dword ptr [Value + 4]
      mov     eax, dword ptr [Value + 0]
      mov     ecx, Index
      wrmsr
    }
  }
 
  FilterAfterMsrWrite (Index, &Value);
 
  return Value;
}