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This commit defines an interface allowing multi-phase reset. This aims to solve a problem of the actual single-phase reset (built in DeviceClass and BusClass): reset behavior is dependent on the order in which reset handlers are called. In particular doing external side-effect (like setting an qemu_irq) is problematic because receiving object may not be reset yet. The Resettable interface divides the reset in 3 well defined phases. To reset an object tree, all 1st phases are executed then all 2nd then all 3rd. See the comments in include/hw/resettable.h for a more complete description. The interface defines 3 phases to let the future possibility of holding an object into reset for some time. The qdev/qbus reset in DeviceClass and BusClass will be modified in following commits to use this interface. A mechanism is provided to allow executing a transitional reset handler in place of the 2nd phase which is executed in children-then-parent order inside a tree. This will allow to transition devices and buses smoothly while keeping the exact current qdev/qbus reset behavior for now. Documentation will be added in a following commit. Signed-off-by: Damien Hedde <damien.hedde@greensocs.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20200123132823.1117486-4-damien.hedde@greensocs.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org> |
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| .. | ||
| bus.c | ||
| cpu.c | ||
| empty_slot.c | ||
| fw-path-provider.c | ||
| generic-loader.c | ||
| hotplug.c | ||
| irq.c | ||
| Kconfig | ||
| loader-fit.c | ||
| loader.c | ||
| machine-hmp-cmds.c | ||
| machine-qmp-cmds.c | ||
| machine.c | ||
| Makefile.objs | ||
| nmi.c | ||
| null-machine.c | ||
| numa.c | ||
| or-irq.c | ||
| platform-bus.c | ||
| ptimer.c | ||
| qdev-fw.c | ||
| qdev-properties-system.c | ||
| qdev-properties.c | ||
| qdev.c | ||
| register.c | ||
| reset.c | ||
| resettable.c | ||
| split-irq.c | ||
| stream.c | ||
| sysbus.c | ||
| trace-events | ||
| uboot_image.h | ||
| vm-change-state-handler.c | ||
| vmstate-if.c | ||