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[PATCH] hw/rx: pass random seed to fdt
From: |
Jason A. Donenfeld |
Subject: |
[PATCH] hw/rx: pass random seed to fdt |
Date: |
Tue, 19 Jul 2022 14:20:33 +0200 |
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 <ysato@users.sourceforge.jp>
Signed-off-by: Jason A. Donenfeld <Jason@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
- [PATCH] hw/rx: pass random seed to fdt,
Jason A. Donenfeld <=