diff mbox series

[PULL,24/30] arm: re-randomize rng-seed on reboot

Message ID 20221025163952.4131046-25-peter.maydell@linaro.org
State Accepted
Commit 98aa4c839d2cd24a2f6d3bbaa68fcb5d4aa502cd
Headers show
Series [PULL,01/30] target/arm: Implement FEAT_E0PD | expand

Commit Message

Peter Maydell Oct. 25, 2022, 4:39 p.m. UTC 
From: "Jason A. Donenfeld" <Jason@zx2c4.com>

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>
Message-id: 20221025004327.568476-5-Jason@zx2c4.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/arm/boot.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index b0b92af1889..b106f314685 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -683,6 +683,8 @@  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_nosnapshotload(qemu_fdt_randomize_seeds,
+                                       rom_ptr_for_as(as, addr, size));
 
     g_free(fdt);