Messages in this thread | | | Date | Sat, 25 Jun 2022 17:51:23 +0200 | Subject | Re: [PATCH] m68k: virt: pass RNG seed via bootinfo block | From | Laurent Vivier <> |
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Le 25/06/2022 à 17:38, Jason A. Donenfeld a écrit : > Other virt VMs can pass RNG seeds via the "rng-seed" device tree > property or via UEFI, but m68k doesn't have either. Instead it has its > own bootinfo protocol. So this commit adds support for receiving a RNG > seed from it, which will be used at the earliest possible time in boot, > just like device tree. > > Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> > --- > arch/m68k/include/uapi/asm/bootinfo-virt.h | 1 + > arch/m68k/virt/config.c | 4 ++++ > 2 files changed, 5 insertions(+) > > diff --git a/arch/m68k/include/uapi/asm/bootinfo-virt.h b/arch/m68k/include/uapi/asm/bootinfo-virt.h > index e4db7e2213ab..7c3044acdf4a 100644 > --- a/arch/m68k/include/uapi/asm/bootinfo-virt.h > +++ b/arch/m68k/include/uapi/asm/bootinfo-virt.h > @@ -12,6 +12,7 @@ > #define BI_VIRT_GF_TTY_BASE 0x8003 > #define BI_VIRT_VIRTIO_BASE 0x8004 > #define BI_VIRT_CTRL_BASE 0x8005 > +#define BI_VIRT_RNG_SEED 0x8006 > > #define VIRT_BOOTI_VERSION MK_BI_VERSION(2, 0) > > diff --git a/arch/m68k/virt/config.c b/arch/m68k/virt/config.c > index 632ba200ad42..ad71af8273ec 100644 > --- a/arch/m68k/virt/config.c > +++ b/arch/m68k/virt/config.c > @@ -2,6 +2,7 @@ > > #include <linux/reboot.h> > #include <linux/serial_core.h> > +#include <linux/random.h> > #include <clocksource/timer-goldfish.h> > > #include <asm/bootinfo.h> > @@ -92,6 +93,9 @@ int __init virt_parse_bootinfo(const struct bi_record *record) > data += 4; > virt_bi_data.virtio.irq = be32_to_cpup(data); > break; > + case BI_VIRT_RNG_SEED: > + add_bootloader_randomness(data + 4, be32_to_cpup(data)); > + break; > default: > unknown = 1; > break;
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
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