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When write to virtual TSC_DEADLINE, if virtual TSC_ADJUST is not zero: - when guest intends to disarm the tsc_deadline timer, should not arm the timer falsely; - when guest intends to arm the tsc_deadline timer, should not disarm the timer falsely. When read from virtual TSC_DEADLINE, if virtual TSC_ADJUST is not zero: - if physical TSC_DEADLINE is not zero, return the virtual TSC_DEADLINE value; - if physical TSC_DEADLINE is zero which means it's not armed (automatically disarmed after timer triggered), return 0 and reset the virtual TSC_DEADLINE. Tracked-On: #4162 Signed-off-by: Yan, Like <like.yan@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>