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authorJan Kiszka <jan.kiszka@siemens.com>2011-06-20 14:06:27 +0200
committerAnthony Liguori <aliguori@us.ibm.com>2011-07-23 11:26:12 -0500
commit691a0c9c9b71360271220c12f20a7238bc302503 (patch)
treedd73ff536345dad4741b6fab3ccd4112d9fe8215 /hw/mc146818rtc.c
parent9e8dd45164af05a5dab00324dd10b037f5bd1e2a (diff)
qemu-timer: Introduce clock reset notifier
QEMU_CLOCK_HOST is based on the system time which may jump backward in case the admin or NTP adjusts it. RTC emulations and other device models can suffer in this case as timers will stall for the period the clock was tuned back. This adds a detection mechanism that checks on every host clock readout if the new time is before the last result. If that is the case a notifier list is informed. Device models interested in this event can register a notifier with the clock. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw/mc146818rtc.c')
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