On 11/11/2009 06:19 PM, Jun Koi wrote:
Hi, I am doing some profiling for a guest VM on KVM. One of things I want to do is to monitor the activities of SS register. Specifically, I want to be notified whenever guest's SS changes its value (like when OS switches from userspace stack to kernel stack). I imagine that I need to reprogram VMCS, so I can get VMEXIT anytime SS changes its value. Is that feasible? If so, which code should I look at in kvm code?
Virtualization extensions don't allow trapping on segment register changes. I recommend modifying qemu/tcg instead.
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