Re: [Qemu-devel] [RFC 6/8] hw/arm/virt: Allow GICv3 DT node with multiple redistributor regions

[Peter Maydell]

On 27 March 2018 at 15:15, Eric Auger <address@hidden> wrote:
> This patch adds the GICState handle in the virtual machine state and
> allows to create a GIC device tree node advertising multiple redistributor
> regions.
>
> There is one range per distributor region following the GIC distributor.
> Please refer to kernel documentation for further details:
> Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
>
> Signed-off-by: Eric Auger <address@hidden>

> +
> +        num_reg_values =  4 * (s->nb_redist_regions + 1);
> +        regs = g_new0(uint64_t, num_reg_values);
> +        qemu_fdt_setprop_cell(vms->fdt, "/intc", "#redistributor-regions",
> +                              s->nb_redist_regions);
> +        regs[0] = 2;
> +        regs[1] = vms->memmap[VIRT_GIC_DIST].base;
> +        regs[2] = 2;
> +        regs[3] = vms->memmap[VIRT_GIC_DIST].size;
> +
> +        for (r = 1; r <= s->nb_redist_regions; r++) {
> +            regs[4 * r] = 2;
> +            regs[4 * r  + 1] = s->redist_region[r - 1].base;
> +            regs[4 * r  + 2] = 2;
> +            /* count redistributors of 2 x 64kB pages */
> +            regs[4 * r  + 3] = (uint64_t)s->redist_region[r - 1].count << 17;

Board code shouldn't be reaching into the GIC device state struct like this.

> +        }
> +        qemu_fdt_setprop_sized_cells_from_array(vms->fdt, "/intc", "reg",
> +                                                num_reg_values / 2, regs);
> +        g_free(regs);
> +
>          if (vms->virt) {
>              qemu_fdt_setprop_cells(vms->fdt, "/intc", "interrupts",

thanks
-- PMM