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| author | Brijesh Singh <brijesh.singh@amd.com> | 2021-08-17 21:46:49 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-08-27 12:10:40 +0000 |
| commit | 80e67af9afcac3b860384cdb1f4613f7240e1630 (patch) | |
| tree | 42cf2521c0d90da5c1bc59f2a66d50118b66afb9 /OvmfPkg/OvmfPkg.dec | |
| parent | 8b15024dc74f2f1352d48c4345e31d7e4777b6f9 (diff) | |
| download | edk2-80e67af9afcac3b860384cdb1f4613f7240e1630.tar.gz | |
OvmfPkg: introduce a common work area
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3429
Both the TDX and SEV support needs to reserve a page in MEMFD as a work
area. The page will contain meta data specific to the guest type.
Currently, the SEV-ES support reserves a page in MEMFD
(PcdSevEsWorkArea) for the work area. This page can be reused as a TDX
work area when Intel TDX is enabled.
Based on the discussion [1], it was agreed to rename the SevEsWorkArea
to the OvmfWorkArea, and add a header that can be used to indicate the
work area type.
[1] https://edk2.groups.io/g/devel/message/78262?p=,,,20,0,0,0::\
created,0,SNP,20,2,0,84476064
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>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Min Xu <min.m.xu@intel.com>
Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
Diffstat (limited to 'OvmfPkg/OvmfPkg.dec')
| -rw-r--r-- | OvmfPkg/OvmfPkg.dec | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec index 8fb6f257e8..c37dafad49 100644 --- a/OvmfPkg/OvmfPkg.dec +++ b/OvmfPkg/OvmfPkg.dec @@ -329,6 +329,18 @@ gUefiOvmfPkgTokenSpaceGuid.PcdQemuHashTableBase|0x0|UINT32|0x47
gUefiOvmfPkgTokenSpaceGuid.PcdQemuHashTableSize|0x0|UINT32|0x48
+ ## The base address and size of the work area used during the SEC
+ # phase by the SEV and TDX supports.
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfWorkAreaBase|0|UINT32|0x49
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfWorkAreaSize|0|UINT32|0x50
+
+ ## The work area contains a fixed size header in the Include/WorkArea.h.
+ # The size of this header is used early boot, and is provided through
+ # a fixed PCD. It need to be kept in sync with any changes to the
+ # header definition.
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfConfidentialComputingWorkAreaHeader|0|UINT32|0x51
+
+
[PcdsDynamic, PcdsDynamicEx]
gUefiOvmfPkgTokenSpaceGuid.PcdEmuVariableEvent|0|UINT64|2
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashVariablesEnable|FALSE|BOOLEAN|0x10
|