On Tue, Jul 19, 2022 at 2:23 PM Jason A. Donenfeld <ja...@zx2c4.com> 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.
>
Reviewed-by: Edgar E. Iglesias <edgar.igles...@amd.com>
>
> Cc: Edgar E. Iglesias <edgar.igles...@gmail.com>
> Signed-off-by: Jason A. Donenfeld <ja...@zx2c4.com>
> ---
> hw/microblaze/boot.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/hw/microblaze/boot.c b/hw/microblaze/boot.c
> index 8b92a9801a..25ad54754e 100644
> --- a/hw/microblaze/boot.c
> +++ b/hw/microblaze/boot.c
> @@ -30,6 +30,7 @@
> #include "qemu/option.h"
> #include "qemu/config-file.h"
> #include "qemu/error-report.h"
> +#include "qemu/guest-random.h"
> #include "sysemu/device_tree.h"
> #include "sysemu/reset.h"
> #include "hw/boards.h"
> @@ -75,6 +76,7 @@ static int microblaze_load_dtb(hwaddr addr,
> int fdt_size;
> void *fdt = NULL;
> int r;
> + uint8_t rng_seed[32];
>
> if (dtb_filename) {
> fdt = load_device_tree(dtb_filename, &fdt_size);
> @@ -83,6 +85,9 @@ static int microblaze_load_dtb(hwaddr addr,
> return 0;
> }
>
> + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed));
> + qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed,
> sizeof(rng_seed));
> +
> if (kernel_cmdline) {
> r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
> kernel_cmdline);
> --
> 2.35.1
>
>
