Re: [Xen-devel] how to keep time of windows pvhvm synchronized with host after resuming

[ANNIE LI <annie.li@xxxxxxxxxx>]

> Not that I can remember.  You could try scattering printks in
> hvm_latch_shinfo_size() to see if it's getting called at all,
> and in arch_set_info_guest() to see if it's calling
> update_domain_wallclock_time() like it should.
hvm_latch_shinfo_size() is called and HVM_PARAM_CALLBACK_IRQ is sent to 
do_hvm_op in hvm.c.
Totally, 4 functions call update_domain_wallclock_time, they are 
rtc_set_time(), arch_set_info_guest(), construct_dom0() and 
do_settime().The result is:
rtc_set_time() is never called.
construct_dom0() and arch_set_info_guest() are called once. However, 
update_domain_wallclock_time() was not called in arch_set_info_guest() 
since v->vcpu_id is 1 instead of 0. Is it the expected result?
do_settime() is called regularly. The call route is 
do_platform_op()->XENPF_settime->do_settime()->update_domain_wallclock_time(). 

Is do_settime(...) the function to update wc_sec and wc_nsec? Parameters 
secs and nsecs are always variable. It seems wc_sec and wc_nsec are 
calculated from secs, nsecs and system_time_base, but wc_sec keep 
unchanged all the time. Anything else i missed?
Thanks
Annie

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