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ee89b59430
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4654 The RMPADJUST instruction is used to change the VMSA attribute of a page, but the VMSA attribute can only be changed when running at VMPL0. To prepare for running at a less priviledged VMPL, use the AmdSvsmLib library API to perform the RMPADJUST. The AmdSvsmLib library will perform the proper operation on behalf of the caller. Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Rahul Kumar <rahul1.kumar@intel.com> Cc: Ray Ni <ray.ni@intel.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Acked-by: Ray Ni <ray.ni@intel.com>
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/** @file
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AMD SEV helper function.
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Copyright (c) 2021 - 2024, AMD Incorporated. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "MpLib.h"
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/**
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Create an SEV-SNP AP save area (VMSA) for use in running the vCPU.
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@param[in] CpuMpData Pointer to CPU MP Data
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@param[in] CpuData Pointer to CPU AP Data
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@param[in] ApicId APIC ID of the vCPU
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**/
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VOID
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SevSnpCreateSaveArea (
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IN CPU_MP_DATA *CpuMpData,
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IN CPU_AP_DATA *CpuData,
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UINT32 ApicId
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)
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{
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//
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// SEV-SNP is not support on 32-bit build.
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//
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ASSERT (FALSE);
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}
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/**
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Create SEV-SNP APs.
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@param[in] CpuMpData Pointer to CPU MP Data
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@param[in] ProcessorNumber The handle number of specified processor
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(-1 for all APs)
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**/
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VOID
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SevSnpCreateAP (
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IN CPU_MP_DATA *CpuMpData,
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IN INTN ProcessorNumber
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)
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{
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//
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// SEV-SNP is not support on 32-bit build.
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//
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ASSERT (FALSE);
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}
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/**
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Determine if the SEV-SNP AP Create protocol should be used.
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@param[in] CpuMpData Pointer to CPU MP Data
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@retval TRUE Use SEV-SNP AP Create protocol
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@retval FALSE Do not use SEV-SNP AP Create protocol
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**/
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BOOLEAN
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CanUseSevSnpCreateAP (
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IN CPU_MP_DATA *CpuMpData
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)
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{
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//
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// SEV-SNP is not supported on 32-bit build.
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//
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return FALSE;
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}
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