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Project Setup

Assignment 1

  1. VMWare Workstation Setup

    • Download and install VMware Workstation.

  2. Create a Virtual Machine

    • Download the Ubuntu ISO.
    • Create a Virtual Machine in VMware Workstation for Ubuntu.

  3. Enable Nested Virtualization

    • In the VM settings, select nested virtualization capabilities.

  4. Fork the Linux Repository

    • Fork the original Linux repository from Linus Torvalds' GitHub.

  5. Check VM's Virtualization Capabilities

    • Inside the VM, check virtualization capabilities using the command cat /proc/cpuinfo.

  6. Install Git

    • Install Git on the VM using the command sudo apt-get install git.

  7. Clone the Forked Repository

    • Clone the forked Linux repository from your GitHub account.

  8. Edit Source Code

    • Navigate to the cloned repository using cd linux.
    • In cmpe283-1.c, add sections of code for primary procbased controls, secondary procbased controls, entry, and exit controls based on the SDM.

  9. Create a Folder for Your Module

    • Create a folder named cmpe283 and place the modified cmpe283-1.c file and the Makefile inside it.

  10. Kernel Building and Installation

    • Run the following commands in sequence:
      • make menuconfig (do not save any changes in the UI and exit)
      • cp /boot/config-<current version> (replace <current version> with the version from uname -a)
      • make oldconfig (press Enter to answer all questions)
      • make prepare
      • make -j <number of cores> (e.g., make -j 4)
      • If you encounter an error related to 'debian/canonical-certs.pem', edit the .config file and set the system trusted keys and revocation keys strings to empty.
      • make -j <number of cores> (e.g., make -j 4)
      • sudo make INSTALL_MOD_STRIP=1 modules_install
      • sudo make install
      • sudo reboot

  11. Check Kernel Version

    • After the reboot, run uname -a to check that the kernel version has changed.

  12. Load and Test Your Module

    • Change directory to the cmpe283 folder.
    • Run make to compile your module.
    • After a successful compile, check that the .ko file is created using lsmod | grep cmpe283.
    • Insert your module with sudo insmod cmpe283-1.ko.

  13. View Module Information

    • Run dmesg to view capability information for all the MSR defined in cmpe283-1.c under the heading "Module Start."

  14. Remove Your Module

    • To remove the module, run sudo rmmod cmpe283-1.
    • Check the exit message with dmesg ("Module Exits").

Assignment 2

  1. Start with Assignment 1 Setup

  2. Modify the cpuid.c and vmx.c Files

    • Make the necessary modifications to the cpuid.c and vmx.c files based on the requirements for tracking exits.

  3. Compile and Install the Kernel

    • Run the following commands:
      • make -j 4 modules
      • make INSTALL_MOD_STRIP=1 modules_install && make install

  4. Unload Existing KVM Modules

    • Run lsmod | grep kvm.
    • If modules are loaded, run rmmod kvm and rmmod kvm_intel.

  5. Load KVM Module

    • Run modprobe kvm.

  6. Install Virtual Machine Manager

    • Install Virtual Machine Manager from the Ubuntu Software Center.

  7. Create an Inner VM

    • Download an Ubuntu ISO and install an Ubuntu VM inside your existing VM (inner VM).

  8. Install cpuid Package

    • Inside the inner VM, install the cpuid package using sudo apt-get install cpuid.

  9. Test Modifications

    • Use the cpuid commands to observe the total exits and exit reasons as described in Assignment 2.

Assignment 3

  1. Start with Assignment 2 Setup

  2. Modify Kernel Code

    • Make edits to linux/arch/x86/kvm/cpuid.c and linux/arch/x86/kvm/vmx/vmx.c to add CPUID leaf nodes for reporting exit times.

  3. Compile and Install the Kernel

    • Follow the steps to compile and install the modified kernel as described in Assignment 2.

  4. Test Modifications

    • Inside the inner VM, use the new CPUID leaf nodes to report exit times.

Assignment 4

  1. Start with Assignment 3 Setup

  2. Run dmesg to Print Exit Counts

    • Run dmesg to print counts for exit reasons.

  3. Analyze Exit Counts

    • Compare the exit counts between nested paging and shadow paging.

  4. Record Observations

    • Record any changes in exit counts and reasons between the two paging methods.