diff options
| author | Brijesh Singh <brijesh.singh@amd.com> | 2021-12-09 11:27:59 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-12-09 06:28:10 +0000 |
| commit | 67484aed694e7d9dff4ae91df0afeff28898c68a (patch) | |
| tree | 574e05fda73ddc6e51f62122cb3cc5393399a64e /OvmfPkg/AmdSevDxe | |
| parent | ea3a12d9706dd405d5eb96901be31de28c3134af (diff) | |
| download | edk2-67484aed694e7d9dff4ae91df0afeff28898c68a.tar.gz | |
OvmfPkg/AmdSev: expose the SNP reserved pages through configuration table
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3275
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 <michael.roth@amd.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Min Xu <min.m.xu@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Diffstat (limited to 'OvmfPkg/AmdSevDxe')
| -rw-r--r-- | OvmfPkg/AmdSevDxe/AmdSevDxe.c | 23 | ||||
| -rw-r--r-- | OvmfPkg/AmdSevDxe/AmdSevDxe.inf | 7 |
2 files changed, 30 insertions, 0 deletions
diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.c b/OvmfPkg/AmdSevDxe/AmdSevDxe.c index be26dde71f..662d3c4ccb 100644 --- a/OvmfPkg/AmdSevDxe/AmdSevDxe.c +++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.c @@ -17,8 +17,20 @@ #include <Library/DxeServicesTableLib.h>
#include <Library/MemEncryptSevLib.h>
#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Guid/ConfidentialComputingSevSnpBlob.h>
#include <Library/PcdLib.h>
+STATIC CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION mSnpBootDxeTable = {
+ SIGNATURE_32 ('A', 'M', 'D', 'E'),
+ 1,
+ 0,
+ (UINT64)(UINTN)FixedPcdGet32 (PcdOvmfSnpSecretsBase),
+ FixedPcdGet32 (PcdOvmfSnpSecretsSize),
+ (UINT64)(UINTN)FixedPcdGet32 (PcdOvmfCpuidBase),
+ FixedPcdGet32 (PcdOvmfCpuidSize),
+};
+
EFI_STATUS
EFIAPI
AmdSevDxeEntryPoint (
@@ -135,5 +147,16 @@ AmdSevDxeEntryPoint ( }
}
+ //
+ // If its SEV-SNP active guest then install the CONFIDENTIAL_COMPUTING_SEV_SNP_BLOB.
+ // It contains the location for both the Secrets and CPUID page.
+ //
+ if (MemEncryptSevSnpIsEnabled ()) {
+ return gBS->InstallConfigurationTable (
+ &gConfidentialComputingSevSnpBlobGuid,
+ &mSnpBootDxeTable
+ );
+ }
+
return EFI_SUCCESS;
}
diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf index 0676fcc5b6..9acf860cf2 100644 --- a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf +++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf @@ -42,6 +42,13 @@ [FixedPcd]
gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfCpuidBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfCpuidSize
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsSize
+
+[Guids]
+ gConfidentialComputingSevSnpBlobGuid
[Pcd]
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId
|