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.
--
Do not meddle in the internals of kernels, for they are subtle and quick to
panic.
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