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OvmfPkg/Tcg2ConfigPei: introduce a signalling PPI to depex on

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On ARM systems, the TPM does not live at a fixed address, and so we
need the platform to discover it first. So introduce a PPI that signals
that the TPM address has been discovered and recorded in the appropriate
PCD, and make Tcg2ConfigPei depex on it when built for ARM or AARCH64.

Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2560
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Ard Biesheuvel
2020-02-26 20:05:06 +01:00
committed by mergify[bot]
parent 4c0f6e349d
commit 6b3d196a7c
2 changed files with 10 additions and 1 deletions
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6
OvmfPkg/Tcg/Tcg2Config/Tcg2ConfigPei.inf
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@@ -25,6 +25,7 @@
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
OvmfPkg/OvmfPkg.dec
SecurityPkg/SecurityPkg.dec
[LibraryClasses]
@@ -43,5 +44,8 @@
[Pcd]
gEfiSecurityPkgTokenSpaceGuid.PcdTpmInstanceGuid ## PRODUCES
[Depex]
[Depex.IA32, Depex.X64]
TRUE
[Depex.ARM, Depex.AARCH64]
gOvmfTpmDiscoveredPpiGuid