On Fri, May 23, 2014 at 11:36:56PM +0200, Paolo Bonzini wrote:
> You can get the current time via the qom-get command, and then
> follow the same algorithm as QEMU:
>
> time_t seconds;
>
> if (rtc_date_offset == -1) {
> if (rtc_utc) {
> seconds = mktimegm(tm);
> } else {
> struct tm tmp = *tm;
> tmp.tm_isdst = -1; /* use timezone to figure it out */
> seconds = mktime(&tmp);
> }
> } else {
> seconds = mktimegm(tm) + rtc_date_offset;
> }
> return seconds - time(NULL);
>
> Unfortunately the QOM path to the RTC device is not stable. We can
> add a /machine/rtc link, and if the PPC guys implement the link and
> current-time property as well, the same mechanism can work for any
> board.
>
> Paolo
I like that idea. Questions:
- What guarantees are there that the interface is stable?
(you can argue that "now it is").
- Perhaps add /machine/stable/ path to contain stable
links ?
- How do i go about adding a link to a device again?
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