diff mbox series

[v2,2/8] arm: re-randomize rng-seed on reboot

Message ID 20221011204645.1160916-3-Jason@zx2c4.com
State New
Headers show
Series rerandomize RNG seeds on reboot and handle record&replay | expand

Commit Message

Jason A. Donenfeld Oct. 11, 2022, 8:46 p.m. UTC 
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: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-arm@nongnu.org
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
 hw/arm/boot.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index ada2717f76..6a6f4c92c2 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -683,6 +683,7 @@  int arm_load_dtb(hwaddr addr, const struct arm_boot_info *binfo,
      * the DTB is copied again upon reset, even if addr points into RAM.
      */
     rom_add_blob_fixed_as("dtb", fdt, size, addr, as);
+    qemu_register_reset(qemu_fdt_randomize_seeds, rom_ptr_for_as(as, addr, size));
 
     g_free(fdt);