Hi,

I use the attached patch to build OVMF with TPM support.

Even without any TPM device configured (with the following qemu
command line) the VM hangs early:

qemu-system-x86_64 -enable-kvm -m 1024 -global
isa-debugcon.iobase=0x402 -debugcon file:ovmf.log -drive
if=pflash,format=raw,file=...src/edk2/Build/OvmfX64/DEBUG_GCC5/FV/OVMF_CODE.fd,readonly
-drive if=pflash,format=raw,file=...src/edk2/Build/OvmfX64/DEBUG_GCC5/FV/OVMF_VARS.fd

I don't have much clue how to debug OVMF, but adding DEBUG lines, I
could learn that during ReserveEmuVariableNvStore(), GetNextHob() runs
an infinite loop, looking for EFI_HOB_TYPE_UNUSED.

How is the HobList populated? Is it possible to add more of the UNUSED entries?

Any help welcome

-- 
Marc-André Lureau