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[Qemu-discuss] QEMU-TPM with SeaBIOS

From: khan wahid
Subject: [Qemu-discuss] QEMU-TPM with SeaBIOS
Date: Wed, 15 Aug 2012 00:40:29 -0700 (PDT)

I want to build a trusted integrity measurement OS, so that a remote party can check the system's integrity. But I don't have a hardware TPM, so I run the TPM emulator (http://tpm-emulator.berlios.de/) and patched my Qemu and SeaBIOS with the TPM related Patches (provided by Mr. Stefan Berger) to test the integrity measurement in virtual machine based Linux. To launch a Linux through Qemu, at first I compiled Linux from the source with Kernel-IMA functionality. Now I have the following files-

The compiled kernel-IMA image at /home/rrsuj/linux-
And the new initrd at /boot/initrd.img-
The patched bios.bin at /home/rrsuj/seabios-0.6.2/out/bios.bin

I first check that the TPM emulator is running, so that Qemu and SeaBIOS find a TPM (although virtual). Then I execute the following command -
#qemu-system-i386  -kernel  /home/rrsuj/linux-  -initrd /boot/initrd.img-  -bios /home/rrsuj/Downloads/seabios/seabios-0.6.2/out/bios.bin It tries to boot Linux, but gives error- "VFS: cannot open root device "<NULL>" or unknown-block (8,1)" "Please append a correct "root=" boot option;" So I did- #qemu-system-i386 -kernel /home/rrsuj/Downloads/linux-  -initrd /boot/initrd.img-  -append "root=/dev/sda1"  -bios /home/rrsuj/Downloads/seabios/seabios-0.6.2/out/bios.bin but the error changes slightly- "VFS: cannot open root device "sda1" or unknown-block (0,0)" "Please append a correct "root=" boot option;" The output of "sudo fdisk -l" is- Device Boot      Start         End      Blocks   Id  System /dev/sda1   *           1        2686    21569536   83  Linux /dev/sda2            2686        2808      979969    5  Extended /dev/sda5            2686        2808      979968   82  Linux swap / Solaris So please tell me, what should I do? I had a plan to install TrustedGrub inside the virtual machine (the guest Linux), so that I can measure the total system from SeaBIOS to TrustedGrub to Linux-IMA. But it is not booting as I mentioned.
Thank you for your help. Best regards

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