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MdeModulePkg: Create PCDs to be used in support of SEV-ES

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BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198

Two new dynamic MdeModulePkg PCDs are needed to support SEV-ES under OVMF:
  - PcdGhcbBase:       UINT64 value that is the base address of the GHCB
                       allocation.
  - PcdGhcbSize:       UINT64 value that is the size, in bytes, of the
                       GHCB allocation (size is dependent on the number of
                       APs).

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Tom Lendacky
2020-08-12 15:21:34 -05:00
committed by mergify[bot]
parent 7f7f511c5a
commit 39936d3393
2 changed files with 17 additions and 0 deletions
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9
MdeModulePkg/MdeModulePkg.dec
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@@ -2063,6 +2063,15 @@
# @Prompt If there is any test key used by the platform.
gEfiMdeModulePkgTokenSpaceGuid.PcdTestKeyUsed|FALSE|BOOLEAN|0x00030003
## This dynamic PCD holds the base address of the Guest-Hypervisor Communication Block (GHCB) pool allocation.
# @Prompt GHCB Pool Base Address
gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0|UINT64|0x00030007
## This dynamic PCD holds the total size of the Guest-Hypervisor Communication Block (GHCB) pool allocation.
# The amount of memory allocated for GHCBs is dependent on the number of APs.
# @Prompt GHCB Pool Size
gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0|UINT64|0x00030008
[PcdsDynamicEx]
## This dynamic PCD enables the default variable setting.
# Its value is the default store ID value. The default value is zero as Standard default.