From 6b23a6791685ac1bf071c0ebb35004e427c1806d Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Tue, 19 Jul 2022 14:01:13 +0200 Subject: [PATCH] hw/nios2: virt: pass random seed to fdt If the FDT contains /chosen/rng-seed, then the Linux RNG will use it to initialize early. Set this using the usual guest random number generation function. This FDT node is part of the DT specification. Cc: Chris Wulff Cc: Marek Vasut Signed-off-by: Jason A. Donenfeld Message-Id: <20220719120113.118034-1-Jason@zx2c4.com> Signed-off-by: Paolo Bonzini --- hw/nios2/boot.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/nios2/boot.c b/hw/nios2/boot.c index 07b8d87633..21cbffff47 100644 --- a/hw/nios2/boot.c +++ b/hw/nios2/boot.c @@ -34,6 +34,7 @@ #include "qemu/option.h" #include "qemu/config-file.h" #include "qemu/error-report.h" +#include "qemu/guest-random.h" #include "sysemu/device_tree.h" #include "sysemu/reset.h" #include "hw/boards.h" @@ -83,6 +84,7 @@ static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize, int fdt_size; void *fdt = NULL; int r; + uint8_t rng_seed[32]; if (dtb_filename) { fdt = load_device_tree(dtb_filename, &fdt_size); @@ -91,6 +93,9 @@ static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize, return 0; } + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); + qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed)); + if (kernel_cmdline) { r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", kernel_cmdline); -- GitLab