On Tue, 19 Jul 2022 21:20:33 +0900,
Jason A. Donenfeld wrote:
>
> If the FDT contains /chosen/rng-seed, then the Linux RNG will use it to
> initialize early. Set this using the usual guest random number
> generation function. This FDT node is part of the DT specification.
>
> Cc: Yoshinori Sato <ys...@users.sourceforge.jp>
> Signed-off-by: Jason A. Donenfeld <ja...@zx2c4.com>
> ---
> hw/rx/rx-gdbsim.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/hw/rx/rx-gdbsim.c b/hw/rx/rx-gdbsim.c
> index be147b4bd9..8ffe1b8035 100644
> --- a/hw/rx/rx-gdbsim.c
> +++ b/hw/rx/rx-gdbsim.c
> @@ -19,6 +19,7 @@
> #include "qemu/osdep.h"
> #include "qemu/cutils.h"
> #include "qemu/error-report.h"
> +#include "qemu/guest-random.h"
> #include "qapi/error.h"
> #include "hw/loader.h"
> #include "hw/rx/rx62n.h"
> @@ -83,6 +84,7 @@ static void rx_gdbsim_init(MachineState *machine)
> MemoryRegion *sysmem = get_system_memory();
> const char *kernel_filename = machine->kernel_filename;
> const char *dtb_filename = machine->dtb;
> + uint8_t rng_seed[32];
>
> if (machine->ram_size < mc->default_ram_size) {
> char *sz = size_to_str(mc->default_ram_size);
> @@ -140,6 +142,8 @@ static void rx_gdbsim_init(MachineState *machine)
> error_report("Couldn't set /chosen/bootargs");
> exit(1);
> }
> + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed));
> + qemu_fdt_setprop(dtb, "/chosen", "rng-seed", rng_seed,
> sizeof(rng_seed));
> /* DTB is located at the end of SDRAM space. */
> dtb_offset = ROUND_DOWN(machine->ram_size - dtb_size, 16);
> rom_add_blob_fixed("dtb", dtb, dtb_size,
> --
> 2.35.1
>
Reviewed-by: Yoshinori Sato <ys...@users.sourceforge.jp>
--
Yosinori Sato
