Re: [PATCH v2 3/4] OvmfPkg: Enable physical presence interface for TPM 1.2

Stefan Berger

On 11/5/21 08:17, Gerd Hoffmann wrote:
On Tue, Nov 02, 2021 at 11:49:09AM -0400, Stefan Berger wrote:
Enable the physical presence interface for TPM 1.2. It is required for the
TPM 1.2 menu to work.

The changes to DxeTcgPhysicalPresenceLib.c are due to the device we are using
in QEMU for presenting the supported PPI commands and results to the OS via
ACPI as well as to store the PPI opcode to execute.
Fails to build for microvm.

+ TcgPhysicalPresenceLib|OvmfPkg/Library/TcgPhysicalPresenceLibNull/DxeTcgPhysicalPresenceLib.inf
I guess this line is needed just next to Tcg2PhysicalPresenceLibNull
(same problem on OvmfXen.dsc)
Fixed in v3 for microvm and Xen and Bhyve also.

You happen to know about the variable lock issue? Why does the variable need to be locked?

Thank you.


take care,

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