Re: [PATCH] hw/arm/xlnx: Connect secondary CGEM IRQs

[Francisco Iglesias <frasse.iglesias@gmail.com>]

Hi Kinsey,

On [2023 Jun 15] Thu 08:48:47, Kinsey Moore wrote:
> The Cadence GEM peripherals as configured for Zynq MPSoC and Versal
> platforms have two priority queues with separate interrupt sources for
> each. If the interrupt source for the second priority queue is not
> connected, they work in polling mode only. This change connects the
> second interrupt source for platforms where it is available. This patch
> has been tested using the lwIP stack with a Xilinx-supplied driver from
> their embeddedsw repository.
> 
> Signed-off-by: Kinsey Moore <kinsey.moore@oarcorp.com>
> ---
>  hw/arm/xlnx-versal.c | 1 +
>  hw/arm/xlnx-zynqmp.c | 2 ++
>  2 files changed, 3 insertions(+)
> 
> diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
> index 60bf5fe657..a9e06b7fd1 100644
> --- a/hw/arm/xlnx-versal.c
> +++ b/hw/arm/xlnx-versal.c
> @@ -272,6 +272,7 @@ static void versal_create_gems(Versal *s, qemu_irq *pic)
>          memory_region_add_subregion(&s->mr_ps, addrs[i], mr);
>  
>          sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, pic[irqs[i]]);
> +        sysbus_connect_irq(SYS_BUS_DEVICE(dev), 1, pic[irqs[i]]);

This is correct (thanks!) but the lines need to be connected through a
qemu_or_irq (in both places), you can look into this commit: c74ccb5dd6 for an
example (and reason).

Best regards,
Francisco

>          g_free(name);
>      }
>  }
> diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
> index 5905a33015..b919b38e91 100644
> --- a/hw/arm/xlnx-zynqmp.c
> +++ b/hw/arm/xlnx-zynqmp.c
> @@ -635,6 +635,8 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp)
>          sysbus_mmio_map(SYS_BUS_DEVICE(&s->gem[i]), 0, gem_addr[i]);
>          sysbus_connect_irq(SYS_BUS_DEVICE(&s->gem[i]), 0,
>                             gic_spi[gem_intr[i]]);
> +        sysbus_connect_irq(SYS_BUS_DEVICE(&s->gem[i]), 1,
> +                           gic_spi[gem_intr[i]]);
>      }
>  
>      for (i = 0; i < XLNX_ZYNQMP_NUM_UARTS; i++) {
> -- 
> 2.30.2
> 
>