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Enable host-clock-based RTC

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Switch RTC emulations to the new host_clock instead of vm_clock by
default. This has the advantage that the emulated RTC will follow
automatically the host time while it might be tuned via NTP. vm_clock
can still be selected by passing '-rtc clock=vm' on the command line.

Note that some RTC emulations (at least M48T59) already use the host
time unconditionally while others (namely MC146818) do not. This patch
introduces the required infrastructure for selecting the base clock but
only converts MC146818 for now.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jan Kiszka 2009-09-15 13:36:04 +02:00 • committed by Anthony Liguori
parent 1ed2fc1fa3
commit 6875204c78
5 changed files with 49 additions and 25 deletions
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3
qemu-config.c
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@ -158,6 +158,9 @@ QemuOptsList qemu_rtc_opts = {
{
.name = "base",
.type = QEMU_OPT_STRING,
},{
.name = "clock",
.type = QEMU_OPT_STRING,
#ifdef TARGET_I386
},{
.name = "driftfix",