Re: [PATCH v2 5/8] rx: re-randomize rng-seed on reboot

[Yoshinori Sato <ysato@users.sourceforge.jp>]

On Wed, 12 Oct 2022 05:46:42 +0900,
Jason A. Donenfeld wrote:
> 
> When the system reboots, the rng-seed that the FDT has should be
> re-randomized, so that the new boot gets a new seed. Since the FDT is in
> the ROM region at this point, we add a hook right after the ROM has been
> added, so that we have a pointer to that copy of the FDT.
> 
> Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
> ---
>  hw/rx/rx-gdbsim.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/hw/rx/rx-gdbsim.c b/hw/rx/rx-gdbsim.c
> index 8ffe1b8035..198d048964 100644
> --- a/hw/rx/rx-gdbsim.c
> +++ b/hw/rx/rx-gdbsim.c
> @@ -25,6 +25,7 @@
>  #include "hw/rx/rx62n.h"
>  #include "sysemu/qtest.h"
>  #include "sysemu/device_tree.h"
> +#include "sysemu/reset.h"
>  #include "hw/boards.h"
>  #include "qom/object.h"
>  
> @@ -148,6 +149,8 @@ static void rx_gdbsim_init(MachineState *machine)
>              dtb_offset = ROUND_DOWN(machine->ram_size - dtb_size, 16);
>              rom_add_blob_fixed("dtb", dtb, dtb_size,
>                                 SDRAM_BASE + dtb_offset);
> +            qemu_register_reset(qemu_fdt_randomize_seeds,
> +                                rom_ptr(SDRAM_BASE + dtb_offset, dtb_size));
>              /* Set dtb address to R1 */
>              RX_CPU(first_cpu)->env.regs[1] = SDRAM_BASE + dtb_offset;
>          }
> -- 
> 2.37.3
> 

Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp>

-- 
Yosinori Sato