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This patch adds support for in-kernel ioapic save and restore (to and from userspace). It uses the same get/set_irqchip ioctl as in-kernel PIC. Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>