| Message ID | 20220929232339.372813-2-Jason@zx2c4.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/6] device-tree: add re-randomization helper function | expand |
On Fri, Sep 30, 2022 at 7:26 AM Jason A. Donenfeld <Jason@zx2c4.com> wrote: > > 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(+) > Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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);
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(+)