Re: [Xen-devel] [PATCH 04/28] ARM: GICv3 ITS: allocate device and collection table

[Julien Grall <julien.grall@xxxxxxx>]

Hi,

On 30/01/17 18:31, Andre Przywara wrote:
> +int gicv3_its_init(struct host_its *hw_its)
> +{
> +    uint64_t reg;
> +    int i;
> +
> +    hw_its->its_base = ioremap_nocache(hw_its->addr, hw_its->size);
> +    if ( !hw_its->its_base )
> +        return -ENOMEM;
> +
> +    for ( i = 0; i < GITS_BASER_NR_REGS; i++ )
> +    {
> +        void __iomem *basereg = hw_its->its_base + GITS_BASER0 + i * 8;
> +        int type;
> +
> +        reg = readq_relaxed(basereg);
> +        type = (reg & GITS_BASER_TYPE_MASK) >> GITS_BASER_TYPE_SHIFT;
> +        switch ( type )
> +        {
> +        case GITS_BASER_TYPE_NONE:
> +            continue;
> +        case GITS_BASER_TYPE_DEVICE:
> +            /* TODO: find some better way of limiting the number of devices */
> +            its_map_baser(basereg, reg, BIT(max_its_device_bits));
> +            break;
> +        case GITS_BASER_TYPE_COLLECTION:
> +            its_map_baser(basereg, reg, NR_CPUS);
And I forgot to mention about the collection. Same remark as for the 
device collection, NR_CPUS is the maximum size.
Cheers,

--
Julien Grall

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