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openrisc: re-randomize rng-seed on reboot

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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: Stafford Horne <shorne@gmail.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Message-id: 20221025004327.568476-11-Jason@zx2c4.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Jason A. Donenfeld 2022-10-25 02:43:26 +02:00 committed by Peter Maydell
parent 4fbae24450
commit 2db07d0506
1 changed files with 3 additions and 0 deletions
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3
hw/openrisc/boot.c
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@ -14,6 +14,7 @@
#include "hw/openrisc/boot.h"
#include "sysemu/device_tree.h"
#include "sysemu/qtest.h"
#include "sysemu/reset.h"
#include <libfdt.h>
@ -111,6 +112,8 @@ uint32_t openrisc_load_fdt(void *fdt, hwaddr load_start,
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;
}