MemEncryptSevLib.c

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#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/MemEncryptSevLib.h>
#include <Register/Amd/Cpuid.h>
#include <Register/Amd/Msr.h>
#include <Register/Cpuid.h>
 
RETURN_STATUS
EFIAPI
MemEncryptSevClearPageEncMask (
  IN PHYSICAL_ADDRESS  Cr3BaseAddress,
  IN PHYSICAL_ADDRESS  BaseAddress,
  IN UINTN             NumPages
  )
{
  //
  // Memory encryption bit is not accessible in 32-bit mode
  //
  return RETURN_UNSUPPORTED;
}
 
RETURN_STATUS
EFIAPI
MemEncryptSevSetPageEncMask (
  IN PHYSICAL_ADDRESS  Cr3BaseAddress,
  IN PHYSICAL_ADDRESS  BaseAddress,
  IN UINTN             NumPages
  )
{
  //
  // Memory encryption bit is not accessible in 32-bit mode
  //
  return RETURN_UNSUPPORTED;
}
 
MEM_ENCRYPT_SEV_ADDRESS_RANGE_STATE
EFIAPI
MemEncryptSevGetAddressRangeState (
  IN PHYSICAL_ADDRESS  Cr3BaseAddress,
  IN PHYSICAL_ADDRESS  BaseAddress,
  IN UINTN             Length
  )
{
  //
  // Memory is always encrypted in 32-bit mode
  //
  return MemEncryptSevAddressRangeEncrypted;
}
 
RETURN_STATUS
EFIAPI
MemEncryptSevClearMmioPageEncMask (
  IN PHYSICAL_ADDRESS  Cr3BaseAddress,
  IN PHYSICAL_ADDRESS  BaseAddress,
  IN UINTN             NumPages
  )
{
  //
  // Memory encryption bit is not accessible in 32-bit mode
  //
  return RETURN_UNSUPPORTED;
}
 
VOID
EFIAPI
MemEncryptSevSnpPreValidateSystemRam (
  IN PHYSICAL_ADDRESS  BaseAddress,
  IN UINTN             NumPages
  )
{
  ASSERT (FALSE);
}