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hw/loongarch/virt: Set max 256 cpus support on loongarch virt machine

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Add separate macro EXTIOI_CPUS for extioi interrupt controller, extioi
only supports 4 cpu. And set macro LOONGARCH_MAX_CPUS as 256 so that
loongarch virt machine supports more cpus.

Interrupts from external devices can only be routed cpu 0-3 because
of extioi limits, cpu internal interrupt such as timer/ipi can be
triggered on all cpus.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230512100421.1867848-3-gaosong@loongson.cn>
This commit is contained in:
Song Gao 2023-04-06 15:25:28 +08:00
parent 78464f023b
commit 646c39b220
No known key found for this signature in database
GPG key ID: 40A2FFF239263EDF
4 changed files with 18 additions and 11 deletions
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13
hw/loongarch/virt.c
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@ -607,8 +607,13 @@ static void loongarch_irq_init(LoongArchMachineState *lams)
memory_region_add_subregion(&env->system_iocsr, MAIL_SEND_ADDR,
sysbus_mmio_get_region(SYS_BUS_DEVICE(ipi),
1));
/* extioi iocsr memory region */
memory_region_add_subregion(&env->system_iocsr, APIC_BASE,
/*
* extioi iocsr memory region
* only one extioi is added on loongarch virt machine
* external device interrupt can only be routed to cpu 0-3
*/
if (cpu < EXTIOI_CPUS)
memory_region_add_subregion(&env->system_iocsr, APIC_BASE,
sysbus_mmio_get_region(SYS_BUS_DEVICE(extioi),
cpu));
}
@ -617,7 +622,7 @@ static void loongarch_irq_init(LoongArchMachineState *lams)
* connect ext irq to the cpu irq
* cpu_pin[9:2] <= intc_pin[7:0]
*/
for (cpu = 0; cpu < ms->smp.cpus; cpu++) {
for (cpu = 0; cpu < MIN(ms->smp.cpus, EXTIOI_CPUS); cpu++) {
cpudev = DEVICE(qemu_get_cpu(cpu));
for (pin = 0; pin < LS3A_INTC_IP; pin++) {
qdev_connect_gpio_out(extioi, (cpu * 8 + pin),
@ -1026,7 +1031,7 @@ static void loongarch_class_init(ObjectClass *oc, void *data)
mc->default_ram_size = 1 * GiB;
mc->default_cpu_type = LOONGARCH_CPU_TYPE_NAME("la464");
mc->default_ram_id = "loongarch.ram";
mc->max_cpus = LOONGARCH_MAX_VCPUS;
mc->max_cpus = LOONGARCH_MAX_CPUS;
mc->is_default = 1;
mc->default_kernel_irqchip_split = false;
mc->block_default_type = IF_VIRTIO;