Hi, I would like to know how rdtsc instruction works when executed in guest. The guest uses kvm-clock for timekeeping. The tsc_timestamp field in the shared page between the hypervisor and guest is updated constantly by the hypervisor. Does rdtsc instruction, when executed in guest, read the value from this shared page? Or does it read the hardware TSC MSR register? If it reads from the hardware TSC MSR register why do I observe different values of TSC when executed in host and guest? Or is the instruction emulated by the hypervisor? Thanks
