From e1e618b9a0f9c23e9caa5933fa30ee3d33e00bfe Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Tue, 25 Oct 2022 02:43:18 +0200 Subject: device-tree: add re-randomization helper function When the system reboots, the rng-seed that the FDT has should be re-randomized, so that the new boot gets a new seed. Several architectures require this functionality, so export a function for injecting a new seed into the given FDT. Cc: Alistair Francis Cc: David Gibson Signed-off-by: Jason A. Donenfeld Reviewed-by: Alistair Francis Message-id: 20221025004327.568476-3-Jason@zx2c4.com Signed-off-by: Peter Maydell --- include/sysemu/device_tree.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include') diff --git a/include/sysemu/device_tree.h b/include/sysemu/device_tree.h index e7c5441..ca5339b 100644 --- a/include/sysemu/device_tree.h +++ b/include/sysemu/device_tree.h @@ -197,6 +197,15 @@ int qemu_fdt_setprop_sized_cells_from_array(void *fdt, qdt_tmp); \ }) + +/** + * qemu_fdt_randomize_seeds: + * @fdt: device tree blob + * + * Re-randomize all "rng-seed" properties with new seeds. + */ +void qemu_fdt_randomize_seeds(void *fdt); + #define FDT_PCI_RANGE_RELOCATABLE 0x80000000 #define FDT_PCI_RANGE_PREFETCHABLE 0x40000000 #define FDT_PCI_RANGE_ALIASED 0x20000000 -- cgit v1.1