From: YannickV <Y.Vossen@beckhoff.com>

Registers are always 32 bit aligned. R_MAX is not the maximum
register address, it is the maximum register number. The memory
size can be determined by 4 * R_MAX.

Currently every register with an offset bigger than 0x40 will be
ignored, because the memory size is set wrong. This effects the
MCTRL register and makes it useless. This commit restores the
correct behaviour.

Signed-off-by: YannickV <Y.Vossen@beckhoff.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
---
 hw/dma/xlnx-zynq-devcfg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/dma/xlnx-zynq-devcfg.c b/hw/dma/xlnx-zynq-devcfg.c
index 512a33b066..abb8c419d9 100644
--- a/hw/dma/xlnx-zynq-devcfg.c
+++ b/hw/dma/xlnx-zynq-devcfg.c
@@ -393,7 +393,7 @@ static void xlnx_zynq_devcfg_init(Object *obj)
                               s->regs_info, s->regs,
                               &xlnx_zynq_devcfg_reg_ops,
                               XLNX_ZYNQ_DEVCFG_ERR_DEBUG,
-                              XLNX_ZYNQ_DEVCFG_R_MAX);
+                              XLNX_ZYNQ_DEVCFG_R_MAX * 4);
     memory_region_add_subregion(&s->iomem,
                                 A_CTRL,
                                 &reg_array->mem);
-- 
2.47.3

On 11/11/25 11:28, Corvin Köhne wrote:
> From: YannickV <Y.Vossen@beckhoff.com>
> 
> Registers are always 32 bit aligned. R_MAX is not the maximum
> register address, it is the maximum register number. The memory
> size can be determined by 4 * R_MAX.
> 
> Currently every register with an offset bigger than 0x40 will be
> ignored, because the memory size is set wrong. This effects the
> MCTRL register and makes it useless. This commit restores the
> correct behaviour.
> 

Cc: qemu-stable@nongnu.org

> Signed-off-by: YannickV <Y.Vossen@beckhoff.com>
> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

> ---
>   hw/dma/xlnx-zynq-devcfg.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)