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Revision 5904ae4e

ID5904ae4eba0928c35845720f9a630c19e48c2131

Added by Jan Kiszka about 12 years ago

hpet: Save/restore cached RTC IRQ level

In legacy mode, the HPET suppresses the RTC interrupt delivery via IRQ
8 but keeps track of the RTC output level and applies it when legacy
mode is turned off again. This value has to be preserved across save/
restore as it cannot be reconstructed otherwise.

To document that a raised rtc_irq_level won't survive a vmload without
a hpet/rtc_irq_level subsection, add an explicit clearing to the reset
handler.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Anthony Liguori <>

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