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    Is it possible to convert a BIOS to UEFI and introduce vTPM into an existing VM?

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    vtpmuefibios
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    • D Offline
      DustinB
      last edited by DustinB

      I'm pretty sure the answer is no, and that the VM needs to start new with UEFI and with vTPM, but just looking for confirmation.

      TIA.

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      • A Offline
        Andrew Top contributor @DustinB
        last edited by

        @DustinB The answer is yes, you can, I have.

        I have changed modern Linux form BIOS to boot as UEFI. All I had to do was change to GPT, add a ESP/EFI boot partition, change the OS partition mounting, and install the needed EFI boot files. Also update the OS to know it's now a EFI boot setup so the OS updates boot files correctly (a GRUB package change). Then I can set the VM to be UEFI boot... It was not an automated process and I did it as an off-line procedure (not booting the OS I was changing).

        UEFI VMs boot quicker than BIOS VMs.

        I have not converted windows as I normally started newer versions as UEFI and older version work better with BIOS.

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        • D Offline
          DustinB @Andrew
          last edited by

          @Andrew To me the summary answer is no, ha. The content of this system is nothing super important. So replacing it new would be the quicker approach.

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