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hw/intc/loongarch_ipi: Implment cpu hotplug interface

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Add logic cpu allocation and cpu mapping with cpu hotplug interface.
When cpu is added, connect ipi gpio irq to CPU IRQ_IPI irq pin.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
This commit is contained in:
Bibo Mao 2025-01-20 12:02:30 +08:00
parent 9d71149a64
commit 54492213e6
1 changed files with 39 additions and 0 deletions
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39
hw/intc/loongarch_ipi.c
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@ -49,6 +49,22 @@ static int loongarch_cpu_by_arch_id(LoongsonIPICommonState *lics,
return MEMTX_ERROR;
}
static IPICore *loongarch_ipi_get_cpu(LoongsonIPICommonState *lics,
DeviceState *dev)
{
CPUClass *k = CPU_GET_CLASS(dev);
uint64_t arch_id = k->get_arch_id(CPU(dev));
int i;
for (i = 0; i < lics->num_cpu; i++) {
if (lics->cpu[i].arch_id == arch_id) {
return &lics->cpu[i];
}
}
return NULL;
}
static void loongarch_ipi_realize(DeviceState *dev, Error **errp)
{
LoongsonIPICommonState *lics = LOONGSON_IPI_COMMON(dev);
@ -80,25 +96,48 @@ static void loongarch_ipi_realize(DeviceState *dev, Error **errp)
static void loongarch_ipi_cpu_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
LoongsonIPICommonState *lics = LOONGSON_IPI_COMMON(hotplug_dev);
Object *obj = OBJECT(dev);
IPICore *core;
int index;
if (!object_dynamic_cast(obj, TYPE_LOONGARCH_CPU)) {
warn_report("LoongArch extioi: Invalid %s device type",
object_get_typename(obj));
return;
}
core = loongarch_ipi_get_cpu(lics, dev);
if (!core) {
return;
}
core->cpu = CPU(dev);
index = core - lics->cpu;
/* connect ipi irq to cpu irq */
qdev_connect_gpio_out(DEVICE(lics), index, qdev_get_gpio_in(dev, IRQ_IPI));
}
static void loongarch_ipi_cpu_unplug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
LoongsonIPICommonState *lics = LOONGSON_IPI_COMMON(hotplug_dev);
Object *obj = OBJECT(dev);
IPICore *core;
if (!object_dynamic_cast(obj, TYPE_LOONGARCH_CPU)) {
warn_report("LoongArch extioi: Invalid %s device type",
object_get_typename(obj));
return;
}
core = loongarch_ipi_get_cpu(lics, dev);
if (!core) {
return;
}
core->cpu = NULL;
}
static void loongarch_ipi_class_init(ObjectClass *klass, void *data)