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 <crwulff@gmail.com> Cc: Marek Vasut <marex@denx.de> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Message-Id: <20220719120113.118034-1-Jason@zx2c4.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -34,6 +34,7 @@
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#include "qemu/option.h"
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#include "qemu/option.h"
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#include "qemu/config-file.h"
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#include "qemu/config-file.h"
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#include "qemu/error-report.h"
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#include "qemu/error-report.h"
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#include "qemu/guest-random.h"
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#include "sysemu/device_tree.h"
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#include "sysemu/device_tree.h"
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#include "sysemu/reset.h"
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#include "sysemu/reset.h"
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#include "hw/boards.h"
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#include "hw/boards.h"
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@ -83,6 +84,7 @@ static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize,
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int fdt_size;
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int fdt_size;
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void *fdt = NULL;
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void *fdt = NULL;
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int r;
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int r;
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uint8_t rng_seed[32];
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if (dtb_filename) {
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if (dtb_filename) {
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fdt = load_device_tree(dtb_filename, &fdt_size);
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fdt = load_device_tree(dtb_filename, &fdt_size);
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@ -91,6 +93,9 @@ static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize,
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return 0;
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return 0;
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}
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}
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qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed));
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qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed));
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if (kernel_cmdline) {
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if (kernel_cmdline) {
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r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
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r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
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kernel_cmdline);
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kernel_cmdline);
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