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hw/loongarch/virt: Add reset support for kernel irqchip

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When system reboot, interrupt controller is restored to initial
state. However if interrupt controller extioi/ipi/pch_pic is
emulated in kernel, it should notify kvm to do so. Here suspend
and restore API is used for reset, set initial state in qemu user
space and restore API is used to notify kvm to reload register
state.

Reviewed-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Message-ID: <20250606063033.2557365-11-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
This commit is contained in:
Bibo Mao 2025-06-06 14:30:30 +08:00 • committed by Song Gao
parent 0dd6798a1a
commit c642ddf19b
6 changed files with 24 additions and 0 deletions
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4
hw/intc/loongarch_ipi.c
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@ -122,6 +122,10 @@ static void loongarch_ipi_reset_hold(Object *obj, ResetType type)
core->clear = 0;
memset(core->buf, 0, sizeof(core->buf));
}
if (kvm_irqchip_in_kernel()) {
kvm_ipi_put(obj, 0);
}
}
static void loongarch_ipi_cpu_plug(HotplugHandler *hotplug_dev,