TODO

TODO

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The following items need some love. Please post to the list if you are interested in helping out:

• Real mode support: VT support for real mode is terrible, so we need to do it in software. This means extending the x86 emulator (x86_emulate.c) to handle more instructions, and changing the execution loop to call the emulator for real mode.
• Fedora kernel package: packaging kernel modules is a rather arcane stuff. We already have volunteers for openSUSE and Debian; we need packages for Fedora.
• Improve mmu page eviction algorithm (currently FIFO, change to approximate LRU).
• Implement kvm_mmu_post_write() so that page table updates don't take an immediate page fault after the write.

The following smaller scale tasks can be a nice entry point to someone wishing to get involved:

• Enforce the virtual time stamp counter monotonicity even when a vcpu is migrated to another physical cpu. (in progress, Leonard Norrgård)
• Avoid saving/loading the floating point unit state on each vm entry/exit (Anthony Liguori has partially working code).
• Trap #UD and emulate sysenter/syscall/sysret/sysexit. These instructions don't exist on all cpus in all modes, so they hinder cross-vendor migration

For the adventurous:

• Emulate the VT and SVM instructions, so that kvm can run in a virtual machine. Test by running a VM in a VT guest in an SVM guest on VT hardware, as well as running a VM in an SVM guest in a VT guest on SVM hardware.
• Attach kvm memory to a Linux address_space so that guest memory can be paged out.