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OvmfPkg: detect TPM 1.2 in Tcg2ConfigPei

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Complement commit 6cf1880fb5 ("OvmfPkg: add customized Tcg2ConfigPei
clone", 2018-03-09) by detecting TPM 1.2 devices.

Since Tpm12RequestUseTpm() returns success on any TPM interface,
(including FIFO & CRB which are TPM 2.0), try to send a GetTicks TPM
1.2 command to probe the version. In case of failure, fallback on TPM
2.0 path.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Message-Id: <20200226152433.1295789-3-marcandre.lureau@redhat.com>
Tested-by: Simon Hardy <simon.hardy@itdev.co.uk>
This commit is contained in:
Marc-André Lureau
2020-02-26 16:24:30 +01:00
committed by mergify[bot]
parent 07952a962a
commit 8923699291
5 changed files with 76 additions and 15 deletions
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3
OvmfPkg/Tcg/Tcg2Config/Tcg2ConfigPei.inf
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@@ -32,11 +32,14 @@
PeimEntryPoint
DebugLib
PeiServicesLib
Tpm12CommandLib
Tpm12DeviceLib
Tpm2DeviceLib
[Guids]
gEfiTpmDeviceSelectedGuid ## PRODUCES ## GUID # Used as a PPI GUID
gEfiTpmDeviceInstanceTpm20DtpmGuid ## SOMETIMES_CONSUMES
gEfiTpmDeviceInstanceTpm12Guid ## SOMETIMES_CONSUMES
[Ppis]
gPeiTpmInitializationDonePpiGuid ## SOMETIMES_PRODUCES