From 64c75db3c5ab6f8c75c8132b200cf1c64186f04b Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Tue, 25 Oct 2022 02:43:21 +0200 Subject: [PATCH] riscv: re-randomize rng-seed on reboot 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: Palmer Dabbelt Cc: Alistair Francis Cc: Bin Meng Cc: qemu-riscv@nongnu.org Signed-off-by: Jason A. Donenfeld Reviewed-by: Alistair Francis Message-id: 20221025004327.568476-6-Jason@zx2c4.com Signed-off-by: Peter Maydell --- hw/riscv/boot.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c index e82bf27338..ebd351c840 100644 --- a/hw/riscv/boot.c +++ b/hw/riscv/boot.c @@ -30,6 +30,7 @@ #include "sysemu/device_tree.h" #include "sysemu/qtest.h" #include "sysemu/kvm.h" +#include "sysemu/reset.h" #include @@ -241,6 +242,8 @@ uint64_t riscv_load_fdt(hwaddr dram_base, uint64_t mem_size, void *fdt) rom_add_blob_fixed_as("fdt", fdt, fdtsize, fdt_addr, &address_space_memory); + qemu_register_reset_nosnapshotload(qemu_fdt_randomize_seeds, + rom_ptr_for_as(&address_space_memory, fdt_addr, fdtsize)); return fdt_addr; } -- 2.30.2