UefiCpuPkg/Include/Register/Amd/Fam17Msr.h

   1 /** @file
   2   MSR Definitions.
   3
   4   Provides defines for Machine Specific Registers(MSR) indexes. Data structures
   5   are provided for MSRs that contain one or more bit fields.  If the MSR value
   6   returned is a single 32-bit or 64-bit value, then a data structure is not
   7   provided for that MSR.
   8
   9   Copyright (c) 2017, Advanced Micro Devices. All rights reserved.<BR>
  10   This program and the accompanying materials
  11   are licensed and made available under the terms and conditions of the BSD License
  12   which accompanies this distribution.  The full text of the license may be found at
  13   http://opensource.org/licenses/bsd-license.php
  14
  15   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  16   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  17
  18   @par Specification Reference:
  19   AMD64 Architecture Programming Manaul volume 2, March 2017, Sections 15.34
  20
  21 **/
  22
  23 #ifndef __FAM17_MSR_H
  24 #define __FAM17_MSR_H
  25
  26 /**
  27   Secure Encrypted Virtualization (SEV) status register
  28
  29 **/
  30 #define MSR_SEV_STATUS                     0xc0010131
  31
  32 /**
  33   MSR information returned for #MSR_SEV_STATUS
  34 **/
  35 typedef union {
  36   ///
  37   /// Individual bit fields
  38   ///
  39   struct {
  40     ///
  41     /// [Bit 0] Secure Encrypted Virtualization (Sev) is enabled
  42     ///
  43     UINT32  SevBit:1;
  44
  45     ///
  46     /// [Bit 1] Secure Encrypted Virtualization Encrypted State (SevEs) is enabled
  47     ///
  48     UINT32  SevEsBit:1;
  49
  50     UINT32  Reserved:30;
  51   } Bits;
  52   ///
  53   /// All bit fields as a 32-bit value
  54   ///
  55   UINT32  Uint32;
  56   ///
  57   /// All bit fields as a 64-bit value
  58   ///
  59   UINT64  Uint64;
  60 } MSR_SEV_STATUS_REGISTER;
  61
  62 #endif