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contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,brijesh.singh@amd.com X-Gm-Message-State: 4dkSGJBMNKIUtOKiV2upCn8Hx1787277AA= Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1631557255; bh=R55qJNJ4H3rGSA6dCkKxjZN7zZTE5K4gpnVJBXxk0VE=; h=CC:Content-Type:Date:From:Reply-To:Subject:To; b=DbyVQKcag9FEoBW4PGCn7wGlctpOVc9V8bR37hI42HrXVHdOEgVjdgTpSJH4JiMbDkU GWMJbxZuI4g6SdS9LbX4yANv/pd/a3hpp+szL/OKxDWkxg3wUtmX97dHgApTxliINbqqn 9o0Z37UVOKfTjiPUKKJx1DowG0dv7grmX/s= X-ZohoMail-DKIM: pass (identity @groups.io) X-ZM-MESSAGEID: 1631557258226100002 Content-Type: text/plain; charset="utf-8" BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3D3275 Now that both the secrets and cpuid pages are reserved in the HOB, extract the location details through fixed PCD and make it available to the guest OS through the configuration table. Cc: Michael Roth Cc: James Bottomley Cc: Min Xu Cc: Jiewen Yao Cc: Tom Lendacky Cc: Jordan Justen Cc: Ard Biesheuvel Cc: Erdem Aktas Cc: Gerd Hoffmann Signed-off-by: Brijesh Singh --- OvmfPkg/OvmfPkg.dec | 1 + OvmfPkg/AmdSevDxe/AmdSevDxe.inf | 7 ++++ .../Guid/ConfidentialComputingSevSnpBlob.h | 33 +++++++++++++++++++ OvmfPkg/AmdSevDxe/AmdSevDxe.c | 23 +++++++++++++ 4 files changed, 64 insertions(+) create mode 100644 OvmfPkg/Include/Guid/ConfidentialComputingSevSnpBlob.h diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec index e30cb6eafcb8..c2fbd26ed925 100644 --- a/OvmfPkg/OvmfPkg.dec +++ b/OvmfPkg/OvmfPkg.dec @@ -124,6 +124,7 @@ [Guids] gQemuKernelLoaderFsMediaGuid =3D {0x1428f772, 0xb64a, 0x441e, {= 0xb8, 0xc3, 0x9e, 0xbd, 0xd7, 0xf8, 0x93, 0xc7}} gGrubFileGuid =3D {0xb5ae312c, 0xbc8a, 0x43b1, {= 0x9c, 0x62, 0xeb, 0xb8, 0x26, 0xdd, 0x5d, 0x07}} gConfidentialComputingSecretGuid =3D {0xadf956ad, 0xe98c, 0x484c, {= 0xae, 0x11, 0xb5, 0x1c, 0x7d, 0x33, 0x64, 0x47}} + gConfidentialComputingSevSnpBlobGuid =3D {0x067b1f5f, 0xcf26, 0x44c5, {= 0x85, 0x54, 0x93, 0xd7, 0x77, 0x91, 0x2d, 0x42}} =20 [Ppis] # PPI whose presence in the PPI database signals that the TPM base addre= ss diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf b/OvmfPkg/AmdSevDxe/AmdSevDxe.= inf index 0676fcc5b6a4..9acf860cf25e 100644 --- a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf +++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf @@ -42,6 +42,13 @@ [FeaturePcd] =20 [FixedPcd] gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfCpuidBase + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfCpuidSize + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsBase + gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsSize + +[Guids] + gConfidentialComputingSevSnpBlobGuid =20 [Pcd] gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId diff --git a/OvmfPkg/Include/Guid/ConfidentialComputingSevSnpBlob.h b/OvmfP= kg/Include/Guid/ConfidentialComputingSevSnpBlob.h new file mode 100644 index 000000000000..c98e7a1dcccd --- /dev/null +++ b/OvmfPkg/Include/Guid/ConfidentialComputingSevSnpBlob.h @@ -0,0 +1,33 @@ + /** @file + UEFI Configuration Table for exposing the SEV-SNP launch blob. + + Copyright (c) 2021, Advanced Micro Devices Inc. All right reserved. + + SPDX-License-Identifier: BSD-2-Clause-Patent + **/ + +#ifndef CONFIDENTIAL_COMPUTING_SEV_SNP_BLOB_H_ +#define CONFIDENTIAL_COMPUTING_SEV_SNP_BLOB_H_ + +#include + +#define CONFIDENTIAL_COMPUTING_SNP_BLOB_GUID \ + { 0x067b1f5f, \ + 0xcf26, \ + 0x44c5, \ + { 0x85, 0x54, 0x93, 0xd7, 0x77, 0x91, 0x2d, 0x42 }, \ + } + +typedef struct { + UINT32 Header; + UINT16 Version; + UINT16 Reserved1; + UINT64 SecretsPhysicalAddress; + UINT32 SecretsSize; + UINT64 CpuidPhysicalAddress; + UINT32 CpuidLSize; +} CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION; + +extern EFI_GUID gConfidentialComputingSevSnpBlobGuid; + +#endif diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.c b/OvmfPkg/AmdSevDxe/AmdSevDxe.c index c66c4e9b9272..6e1ba35e02b8 100644 --- a/OvmfPkg/AmdSevDxe/AmdSevDxe.c +++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.c @@ -17,8 +17,20 @@ #include #include #include +#include +#include #include =20 +STATIC CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION mSnpBootDxeTable =3D { + SIGNATURE_32('A','M','D','E'), + 1, + 0, + (UINT64)(UINTN) FixedPcdGet32 (PcdOvmfSnpSecretsBase), + FixedPcdGet32 (PcdOvmfSnpSecretsSize), + (UINT64)(UINTN) FixedPcdGet32 (PcdOvmfCpuidBase), + FixedPcdGet32 (PcdOvmfCpuidSize), +}; + EFI_STATUS EFIAPI AmdSevDxeEntryPoint ( @@ -130,5 +142,16 @@ AmdSevDxeEntryPoint ( } } =20 + // + // If its SEV-SNP active guest then install the CONFIDENTIAL_COMPUTING_S= EV_SNP_BLOB. + // It contains the location for both the Secrets and CPUID page. + // + if (MemEncryptSevSnpIsEnabled ()) { + return gBS->InstallConfigurationTable ( + &gConfidentialComputingSevSnpBlobGuid, + &mSnpBootDxeTable + ); + } + return EFI_SUCCESS; } --=20 2.17.1 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. 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