On virt machine, enable cpu hotplug feature has_hotpluggable_cpus.
For hot-added cpu after power on, interrupt pin of extioi and ipi
interrupt controller need connect to pins of new cpu.
Also change num-cpu property of extioi and ipi from smp.cpus to
smp.max_cpus
Co-developed-by: Xianglai Li <lixiang...@loongson.cn>
Signed-off-by: Bibo Mao <maob...@loongson.cn>
---
hw/loongarch/virt.c | 68 ++++++++++++++++++++++++++++++++++---
include/hw/loongarch/virt.h | 2 ++
2 files changed, 66 insertions(+), 4 deletions(-)
diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index 655312b0fe..cecb12786b 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -851,8 +851,9 @@ static void virt_irq_init(LoongArchVirtMachineState *lvms)
/* Create IPI device */
ipi = qdev_new(TYPE_LOONGARCH_IPI);
- qdev_prop_set_uint32(ipi, "num-cpu", ms->smp.cpus);
+ qdev_prop_set_uint32(ipi, "num-cpu", ms->smp.max_cpus);
sysbus_realize_and_unref(SYS_BUS_DEVICE(ipi), &error_fatal);
+ lvms->ipi = ipi;
/* IPI iocsr memory region */
memory_region_add_subregion(&lvms->system_iocsr, SMP_IPI_MAILBOX,
@@ -877,11 +878,12 @@ static void virt_irq_init(LoongArchVirtMachineState *lvms)
/* Create EXTIOI device */
extioi = qdev_new(TYPE_LOONGARCH_EXTIOI);
- qdev_prop_set_uint32(extioi, "num-cpu", ms->smp.cpus);
+ qdev_prop_set_uint32(extioi, "num-cpu", ms->smp.max_cpus);
if (virt_is_veiointc_enabled(lvms)) {
qdev_prop_set_bit(extioi, "has-virtualization-extension", true);
}
sysbus_realize_and_unref(SYS_BUS_DEVICE(extioi), &error_fatal);
+ lvms->extioi = extioi;
memory_region_add_subregion(&lvms->system_iocsr, APIC_BASE,
sysbus_mmio_get_region(SYS_BUS_DEVICE(extioi), 0));
if (virt_is_veiointc_enabled(lvms)) {
@@ -1382,8 +1384,40 @@ static void virt_cpu_pre_plug(HotplugHandler
*hotplug_dev,
}
if (cpu->phy_id == UNSET_PHY_ID) {
- error_setg(&local_err, "CPU hotplug not supported");
- goto out;
+ if ((cpu->thread_id < 0) || (cpu->thread_id >= ms->smp.threads)) {
+ error_setg(&local_err,
+ "Invalid thread-id %u specified, must be in range 1:%u",
+ cpu->thread_id, ms->smp.threads - 1);
+ goto out;
+ }
+
+ if ((cpu->core_id < 0) || (cpu->core_id >= ms->smp.cores)) {
+ error_setg(&local_err,
+ "Invalid core-id %u specified, must be in range 1:%u",
+ cpu->core_id, ms->smp.cores - 1);
+ goto out;
+ }
+
+ if ((cpu->socket_id < 0) || (cpu->socket_id >= ms->smp.sockets)) {
+ error_setg(&local_err,
+ "Invalid socket-id %u specified, must be in range 1:%u",
+ cpu->socket_id, ms->smp.sockets - 1);
+ goto out;
+ }
+
+ topo.socket_id = cpu->socket_id;
+ topo.core_id = cpu->core_id;
+ topo.thread_id = cpu->thread_id;
+ arch_id = virt_get_arch_id_from_topo(ms, &topo);
+ cpu_slot = virt_find_cpu_slot(ms, arch_id, &index);
+ if (CPU(cpu_slot->cpu)) {
+ error_setg(&local_err,
+ "cpu(id%d=%d:%d:%d) with arch-id %" PRIu64 " exists",
+ cs->cpu_index, cpu->socket_id, cpu->core_id,
+ cpu->thread_id, cpu_slot->arch_id);
+ goto out;
+ }
+ cpu->phy_id = arch_id;
} else {
/*
* For non hot-add cpu, topo property is not set. And only physical id
@@ -1465,8 +1499,33 @@ static void virt_cpu_plug(HotplugHandler *hotplug_dev,
DeviceState *dev, Error **errp)
{
CPUArchId *cpu_slot;
+ Error *local_err = NULL;
LoongArchCPU *cpu = LOONGARCH_CPU(dev);
+ CPUState *cs = CPU(cpu);
+ CPULoongArchState *env;
LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(hotplug_dev);
+ int pin;
+
+ if (lvms->acpi_ged) {
+ env = &(cpu->env);
+ env->address_space_iocsr = &lvms->as_iocsr;
+
+ /* connect ipi irq to cpu irq, logic cpu index used here */
+ qdev_connect_gpio_out(lvms->ipi, cs->cpu_index,
+ qdev_get_gpio_in(dev, IRQ_IPI));
+ env->ipistate = lvms->ipi;
+
+ for (pin = 0; pin < LS3A_INTC_IP; pin++) {
+ qdev_connect_gpio_out(lvms->extioi, (cs->cpu_index * 8 + pin),
+ qdev_get_gpio_in(dev, pin + 2));
+ }
+
+ hotplug_handler_plug(HOTPLUG_HANDLER(lvms->acpi_ged), dev, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ }
cpu_slot = virt_find_cpu_slot(MACHINE(lvms), cpu->phy_id, NULL);
cpu_slot->cpu = CPU(dev);
@@ -1652,6 +1711,7 @@ static void virt_class_init(ObjectClass *oc, void *data)
mc->numa_mem_supported = true;
mc->auto_enable_numa_with_memhp = true;
mc->auto_enable_numa_with_memdev = true;
+ mc->has_hotpluggable_cpus = true;
mc->get_hotplug_handler = virt_get_hotplug_handler;
mc->default_nic = "virtio-net-pci";
hc->plug = virt_device_plug_cb;
diff --git a/include/hw/loongarch/virt.h b/include/hw/loongarch/virt.h
index 861034d614..79a85723c9 100644
--- a/include/hw/loongarch/virt.h
+++ b/include/hw/loongarch/virt.h
@@ -61,6 +61,8 @@ struct LoongArchVirtMachineState {
MemoryRegion iocsr_mem;
AddressSpace as_iocsr;
struct loongarch_boot_info bootinfo;
+ DeviceState *ipi;
+ DeviceState *extioi;
};
#define TYPE_LOONGARCH_VIRT_MACHINE MACHINE_TYPE_NAME("virt")
--
2.39.3
