From: Jason A. Donenfeld Date: Tue, 19 Jul 2022 12:20:33 +0000 (+0200) Subject: hw/rx: pass random seed to fdt X-Git-Tag: qemu-xen-4.18.0-rc5~601^2~1 X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=c287941a4d;p=qemu-xen.git hw/rx: pass random seed to fdt 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 Signed-off-by: Jason A. Donenfeld Message-Id: <20220719122033.135902-1-Jason@zx2c4.com> Signed-off-by: Paolo Bonzini --- 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,