On Fri, Aug 15, 2025 at 11:01:02AM +0200, Corvin Köhne wrote:
> From: YannickV <y.vos...@beckhoff.com>
>
> During the emulation startup, all registers are reset, which triggers the
> `r_unlock_post_write` function with a value of 0. This led to an
> unintended memory access disable, making the devcfg unusable.
>
> During startup, the memory space no longer gets locked.
>
> Signed-off-by: Yannick Voßen <y.vos...@beckhoff.com>
Reviewed-by: Edgar E. Iglesias <edgar.igles...@amd.com>
> ---
> hw/dma/xlnx-zynq-devcfg.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/hw/dma/xlnx-zynq-devcfg.c b/hw/dma/xlnx-zynq-devcfg.c
> index b838c1c0d0..f28d0015e6 100644
> --- a/hw/dma/xlnx-zynq-devcfg.c
> +++ b/hw/dma/xlnx-zynq-devcfg.c
> @@ -221,7 +221,9 @@ static void r_unlock_post_write(RegisterInfo *reg,
> uint64_t val)
> {
> XlnxZynqDevcfg *s = XLNX_ZYNQ_DEVCFG(reg->opaque);
> const char *device_prefix = object_get_typename(OBJECT(s));
> -
> + if (device_is_in_reset(DEVICE(s))) {
> + return;
> + }
> if (val == R_UNLOCK_MAGIC) {
> DB_PRINT("successful unlock\n");
> s->regs[R_CTRL] |= R_CTRL_PCAP_PR_MASK;
> --
> 2.50.1
>
