On 10/24/2012 05:13 PM, Marcelo Tosatti wrote:
> Allow a guest to register a second location for the VCPU time info
> 
> structure for each vcpu (as described by MSR_KVM_SYSTEM_TIME_NEW).
> This is intended to allow the guest kernel to map this information
> into a usermode accessible page, so that usermode can efficiently
> calculate system time from the TSC without having to make a syscall.
> 
> Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com>

Can you please be a bit more specific about why we need this? Why does
the host need to provide us with two pages with the exact same data? Why
can't just do it with mapping tricks in the guest?


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