qemu/system/rtc.c

4  * Copyright (c) 2003-2020 QEMU contributors
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
28 #include "qemu/error-report.h"
44 static int rtc_host_datetime_offset = -1; /* valid & used only with
53     case QEMU_CLOCK_REALTIME:  in qemu_ref_timedate()
54         value -= rtc_realtime_clock_offset;  in qemu_ref_timedate()
56     case QEMU_CLOCK_VIRTUAL:  in qemu_ref_timedate()
59     case QEMU_CLOCK_HOST:  in qemu_ref_timedate()
61             value -= rtc_host_datetime_offset;  in qemu_ref_timedate()
77     case RTC_BASE_DATETIME:  in qemu_get_timedate()
78     case RTC_BASE_UTC:  in qemu_get_timedate()
81     case RTC_BASE_LOCALTIME:  in qemu_get_timedate()
92     case RTC_BASE_DATETIME:  in qemu_timedate_diff()
93     case RTC_BASE_UTC:  in qemu_timedate_diff()
96     case RTC_BASE_LOCALTIME:  in qemu_timedate_diff()
99         tmp.tm_isdst = -1; /* use timezone to figure it out */  in qemu_timedate_diff()
107     return seconds - qemu_ref_timedate(QEMU_CLOCK_HOST);  in qemu_timedate_diff()
115     if (sscanf(startdate, "%d-%d-%dT%d:%d:%d", &tm.tm_year, &tm.tm_mon,  in configure_rtc_base_datetime()
118     } else if (sscanf(startdate, "%d-%d-%d",  in configure_rtc_base_datetime()
126     tm.tm_year -= 1900;  in configure_rtc_base_datetime()
127     tm.tm_mon--;  in configure_rtc_base_datetime()
129     if (rtc_start_datetime == -1) {  in configure_rtc_base_datetime()
133                      "'2006-06-17T16:01:21' or '2006-06-17'\n");  in configure_rtc_base_datetime()
136     rtc_host_datetime_offset = rtc_ref_start_datetime - rtc_start_datetime;  in configure_rtc_base_datetime()
155             replay_add_blocker("-rtc base=localtime");  in configure_rtc()