On Wed, May 30, 2018 at 11:19:13PM -0400, Arnabjyoti Kalita wrote: > I am trying to implement a 'minimal' record-replay mechanism for KVM, which > is similar to the one existing for TCG via -icount. I am trying to record > I/O events only (specifically disk and network events) when KVM does a > VMEXIT. This has led me to the function kvm_cpu_exec where I can clearly > see the different ways of handling all of the possible VMExit cases (like > PIO, MMIO etc.). To record network packets, I am working with the e1000 > hardware device. > > Can I make sure that all of the network I/O, atleast for the e1000 device > happens through the KVM_EXIT_MMIO case and subsequent use of the > address_space_rw() function ? Do I also need to look at other functions as > well ? Also for recording disk activity, can I make sure that looking out > for the KVM_EXIT_MMIO and/or KVM_EXIT_PIO cases in the vmexit mechanism, > will be enough ? > > Let me know if there are other details that I need to take care of. I am > using QEMU 2.11 on a x86-64 CPU and the guest runs a Linux Kernel 4.4 with > Ubuntu 16.04.
I have CCed Pavel Dovgalyuk, the record/replay maintainer. Stefan
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