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-rw-r--r--vl.c62
1 files changed, 39 insertions, 23 deletions
diff --git a/vl.c b/vl.c
index d15e086140..5bb53f7204 100644
--- a/vl.c
+++ b/vl.c
@@ -152,8 +152,10 @@ static enum {
RTC_BASE_LOCALTIME,
RTC_BASE_DATETIME,
} rtc_base_type = RTC_BASE_UTC;
-static int rtc_host_datetime_offset = -1; /* valid only for host rtc_clock and
- rtc_base_type=RTC_BASE_DATETIME */
+static time_t rtc_ref_start_datetime;
+static int rtc_realtime_clock_offset; /* used only with QEMU_CLOCK_REALTIME */
+static int rtc_host_datetime_offset = -1; /* valid & used only with
+ RTC_BASE_DATETIME */
QEMUClockType rtc_clock;
int vga_interface_type = VGA_NONE;
static DisplayOptions dpy;
@@ -247,6 +249,7 @@ static struct {
static QemuOptsList qemu_rtc_opts = {
.name = "rtc",
.head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
+ .merge_lists = true,
.desc = {
{
.name = "base",
@@ -785,32 +788,42 @@ void qemu_system_vmstop_request(RunState state)
}
/***********************************************************/
-/* real time host monotonic timer */
-
-static time_t qemu_timedate(void)
+/* RTC reference time/date access */
+static time_t qemu_ref_timedate(void)
{
- return qemu_clock_get_ms(QEMU_CLOCK_HOST) / 1000;
+ time_t value = qemu_clock_get_ms(rtc_clock) / 1000;
+ switch (rtc_clock) {
+ case QEMU_CLOCK_REALTIME:
+ value -= rtc_realtime_clock_offset;
+ /* no break */
+ case QEMU_CLOCK_VIRTUAL:
+ value += rtc_ref_start_datetime;
+ break;
+ case QEMU_CLOCK_HOST:
+ if (rtc_base_type == RTC_BASE_DATETIME) {
+ value -= rtc_host_datetime_offset;
+ }
+ break;
+ default:
+ assert(0);
+ }
+ return value;
}
-/***********************************************************/
-/* RTC reference time/date access */
void qemu_get_timedate(struct tm *tm, int offset)
{
- time_t ti = qemu_timedate();
+ time_t ti = qemu_ref_timedate();
ti += offset;
switch (rtc_base_type) {
+ case RTC_BASE_DATETIME:
case RTC_BASE_UTC:
gmtime_r(&ti, tm);
break;
case RTC_BASE_LOCALTIME:
localtime_r(&ti, tm);
break;
- case RTC_BASE_DATETIME:
- ti -= rtc_host_datetime_offset;
- gmtime_r(&ti, tm);
- break;
}
}
@@ -819,6 +832,7 @@ int qemu_timedate_diff(struct tm *tm)
time_t seconds;
switch (rtc_base_type) {
+ case RTC_BASE_DATETIME:
case RTC_BASE_UTC:
seconds = mktimegm(tm);
break;
@@ -829,17 +843,14 @@ int qemu_timedate_diff(struct tm *tm)
seconds = mktime(&tmp);
break;
}
- case RTC_BASE_DATETIME:
- seconds = mktimegm(tm) + rtc_host_datetime_offset;
- break;
default:
abort();
}
- return seconds - qemu_timedate();
+ return seconds - qemu_ref_timedate();
}
-static void configure_rtc_host_datetime_offset(const char *startdate)
+static void configure_rtc_base_datetime(const char *startdate)
{
time_t rtc_start_datetime;
struct tm tm;
@@ -865,14 +876,19 @@ static void configure_rtc_host_datetime_offset(const char *startdate)
"'2006-06-17T16:01:21' or '2006-06-17'\n");
exit(1);
}
- rtc_host_datetime_offset = (qemu_clock_get_ms(QEMU_CLOCK_HOST) / 1000)
- - rtc_start_datetime;
+ rtc_host_datetime_offset = rtc_ref_start_datetime - rtc_start_datetime;
+ rtc_ref_start_datetime = rtc_start_datetime;
}
static void configure_rtc(QemuOpts *opts)
{
const char *value;
+ /* Set defaults */
+ rtc_clock = QEMU_CLOCK_HOST;
+ rtc_ref_start_datetime = qemu_clock_get_ms(QEMU_CLOCK_HOST) / 1000;
+ rtc_realtime_clock_offset = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) / 1000;
+
value = qemu_opt_get(opts, "base");
if (value) {
if (!strcmp(value, "utc")) {
@@ -885,7 +901,7 @@ static void configure_rtc(QemuOpts *opts)
replay_add_blocker(blocker);
} else {
rtc_base_type = RTC_BASE_DATETIME;
- configure_rtc_host_datetime_offset(value);
+ configure_rtc_base_datetime(value);
}
}
value = qemu_opt_get(opts, "clock");
@@ -3035,7 +3051,6 @@ int main(int argc, char **argv, char **envp)
error_reportf_err(err, "cannot initialize crypto: ");
exit(1);
}
- rtc_clock = QEMU_CLOCK_HOST;
QLIST_INIT (&vm_change_state_head);
os_setup_early_signal_handling();
@@ -3755,7 +3770,6 @@ int main(int argc, char **argv, char **envp)
if (!opts) {
exit(1);
}
- configure_rtc(opts);
break;
case QEMU_OPTION_tb_size:
#ifndef CONFIG_TCG
@@ -3973,6 +3987,8 @@ int main(int argc, char **argv, char **envp)
exit(EXIT_FAILURE);
}
+ configure_rtc(qemu_find_opts_singleton("rtc"));
+
machine_class = select_machine();
set_memory_options(&ram_slots, &maxram_size, machine_class);