Recent Linux kernel (tested next-20170224) was complaining about missing GIC mask and was unable to bring up secondary CPU:
[ 0.000000] NR_IRQS:16 nr_irqs:16 16 [ 0.000000] GIC CPU mask not found - kernel will fail to boot. ... [ 0.400492] smp: Bringing up secondary CPUs ... [ 1.413184] CPU1: failed to boot: -110 [ 1.423981] smp: Brought up 1 node, 1 CPU In its instance_init() call, the Exynos GIC driver was setting GIC memory mappings for each CPU, from 1 up to "num-cpu" property. The Exynos4210 machine init call on the other hand, first created Exynos GIC device and then set the "num-cpu" property which was too late. The init already happened with default "num-cpu" value of 1 thus GIC mappings were created only for the first CPU. Split the Exynos GIC init code into realize function so the code will see updated "num-cpu" property. This fixes the warning and brings second CPU: [ 0.435780] CPU1: thread -1, cpu 1, socket 9, mpidr 80000901 [ 0.451838] smp: Brought up 1 node, 2 CPUs Signed-off-by: Krzysztof Kozlowski <k...@kernel.org> --- But please read cover letter! --- hw/intc/exynos4210_gic.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/hw/intc/exynos4210_gic.c b/hw/intc/exynos4210_gic.c index 2a55817b7660..5986e54d39c9 100644 --- a/hw/intc/exynos4210_gic.c +++ b/hw/intc/exynos4210_gic.c @@ -283,9 +283,19 @@ static void exynos4210_gic_set_irq(void *opaque, int irq, int level) static void exynos4210_gic_init(Object *obj) { - DeviceState *dev = DEVICE(obj); Exynos4210GicState *s = EXYNOS4210_GIC(obj); - SysBusDevice *sbd = SYS_BUS_DEVICE(obj); + + memory_region_init(&s->cpu_container, obj, "exynos4210-cpu-container", + EXYNOS4210_EXT_GIC_CPU_REGION_SIZE); + memory_region_init(&s->dist_container, obj, "exynos4210-dist-container", + EXYNOS4210_EXT_GIC_DIST_REGION_SIZE); + +} + +static void exynos4210_gic_realize(DeviceState *dev, Error **errp) +{ + Exynos4210GicState *s = EXYNOS4210_GIC(dev); + SysBusDevice *sbd = SYS_BUS_DEVICE(dev); uint32_t i; const char cpu_prefix[] = "exynos4210-gic-alias_cpu"; const char dist_prefix[] = "exynos4210-gic-alias_dist"; @@ -306,15 +316,10 @@ static void exynos4210_gic_init(Object *obj) qdev_init_gpio_in(dev, exynos4210_gic_set_irq, EXYNOS4210_GIC_NIRQ - 32); - memory_region_init(&s->cpu_container, obj, "exynos4210-cpu-container", - EXYNOS4210_EXT_GIC_CPU_REGION_SIZE); - memory_region_init(&s->dist_container, obj, "exynos4210-dist-container", - EXYNOS4210_EXT_GIC_DIST_REGION_SIZE); - for (i = 0; i < s->num_cpu; i++) { /* Map CPU interface per SMP Core */ sprintf(cpu_alias_name, "%s%x", cpu_prefix, i); - memory_region_init_alias(&s->cpu_alias[i], obj, + memory_region_init_alias(&s->cpu_alias[i], OBJECT(s), cpu_alias_name, sysbus_mmio_get_region(busdev, 1), 0, @@ -324,7 +329,7 @@ static void exynos4210_gic_init(Object *obj) /* Map Distributor per SMP Core */ sprintf(dist_alias_name, "%s%x", dist_prefix, i); - memory_region_init_alias(&s->dist_alias[i], obj, + memory_region_init_alias(&s->dist_alias[i], OBJECT(s), dist_alias_name, sysbus_mmio_get_region(busdev, 0), 0, @@ -346,6 +351,7 @@ static void exynos4210_gic_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); + dc->realize = exynos4210_gic_realize; dc->props = exynos4210_gic_properties; } -- 2.9.3