From a1ee38ab1a75ee20e4aad232894db3ea45d3ce4f Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Sun, 26 Jun 2022 13:15:09 +0200 Subject: m68k: virt: Use RNG seed from bootinfo block 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. Reviewed-by: Laurent Vivier Signed-off-by: Jason A. Donenfeld Link: https://lore.kernel.org/r/20220626111509.330159-1-Jason@zx2c4.com Signed-off-by: Geert Uytterhoeven --- arch/m68k/include/uapi/asm/bootinfo-virt.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/m68k/include') diff --git a/arch/m68k/include/uapi/asm/bootinfo-virt.h b/arch/m68k/include/uapi/asm/bootinfo-virt.h index e4db7e2213ab..b091ee9b06e0 100644 --- a/arch/m68k/include/uapi/asm/bootinfo-virt.h +++ b/arch/m68k/include/uapi/asm/bootinfo-virt.h @@ -13,6 +13,14 @@ #define BI_VIRT_VIRTIO_BASE 0x8004 #define BI_VIRT_CTRL_BASE 0x8005 +/* + * A random seed used to initialize the RNG. Record format: + * + * - length [ 2 bytes, 16-bit big endian ] + * - seed data [ `length` bytes, padded to preserve 2-byte alignment ] + */ +#define BI_VIRT_RNG_SEED 0x8006 + #define VIRT_BOOTI_VERSION MK_BI_VERSION(2, 0) #endif /* _UAPI_ASM_M68K_BOOTINFO_MAC_H */ -- cgit v1.2.3