| Message ID | 20220719122033.135902-1-Jason@zx2c4.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | hw/rx: pass random seed to fdt | expand |
On Tue, 19 Jul 2022 21:20:33 +0900, Jason A. Donenfeld wrote: > > 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: Yoshinori Sato <ysato@users.sourceforge.jp> > Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> > --- > hw/rx/rx-gdbsim.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/hw/rx/rx-gdbsim.c b/hw/rx/rx-gdbsim.c > index be147b4bd9..8ffe1b8035 100644 > --- a/hw/rx/rx-gdbsim.c > +++ b/hw/rx/rx-gdbsim.c > @@ -19,6 +19,7 @@ > #include "qemu/osdep.h" > #include "qemu/cutils.h" > #include "qemu/error-report.h" > +#include "qemu/guest-random.h" > #include "qapi/error.h" > #include "hw/loader.h" > #include "hw/rx/rx62n.h" > @@ -83,6 +84,7 @@ static void rx_gdbsim_init(MachineState *machine) > MemoryRegion *sysmem = get_system_memory(); > const char *kernel_filename = machine->kernel_filename; > const char *dtb_filename = machine->dtb; > + uint8_t rng_seed[32]; > > if (machine->ram_size < mc->default_ram_size) { > char *sz = size_to_str(mc->default_ram_size); > @@ -140,6 +142,8 @@ static void rx_gdbsim_init(MachineState *machine) > error_report("Couldn't set /chosen/bootargs"); > exit(1); > } > + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); > + qemu_fdt_setprop(dtb, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed)); > /* DTB is located at the end of SDRAM space. */ > dtb_offset = ROUND_DOWN(machine->ram_size - dtb_size, 16); > rom_add_blob_fixed("dtb", dtb, dtb_size, > -- > 2.35.1 > Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp>
diff --git a/hw/rx/rx-gdbsim.c b/hw/rx/rx-gdbsim.c index be147b4bd9..8ffe1b8035 100644 --- a/hw/rx/rx-gdbsim.c +++ b/hw/rx/rx-gdbsim.c @@ -19,6 +19,7 @@ #include "qemu/osdep.h" #include "qemu/cutils.h" #include "qemu/error-report.h" +#include "qemu/guest-random.h" #include "qapi/error.h" #include "hw/loader.h" #include "hw/rx/rx62n.h" @@ -83,6 +84,7 @@ static void rx_gdbsim_init(MachineState *machine) MemoryRegion *sysmem = get_system_memory(); const char *kernel_filename = machine->kernel_filename; const char *dtb_filename = machine->dtb; + uint8_t rng_seed[32]; if (machine->ram_size < mc->default_ram_size) { char *sz = size_to_str(mc->default_ram_size); @@ -140,6 +142,8 @@ static void rx_gdbsim_init(MachineState *machine) error_report("Couldn't set /chosen/bootargs"); exit(1); } + qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); + qemu_fdt_setprop(dtb, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed)); /* DTB is located at the end of SDRAM space. */ dtb_offset = ROUND_DOWN(machine->ram_size - dtb_size, 16); rom_add_blob_fixed("dtb", dtb, dtb_size,
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: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> --- hw/rx/rx-gdbsim.c | 4 ++++ 1 file changed, 4 insertions(+)