From f552fa496c9e738afa069dd33578558fe4eb41ee Mon Sep 17 00:00:00 2001 From: Sughosh Ganu Date: Sun, 29 Dec 2019 00:01:05 +0530 Subject: efi: qemu: arm64: Add efi_rng_protocol implementation for the platform Add support for the EFI_RNG_PROTOCOL routines for the qemu arm64 platform. EFI_RNG_PROTOCOL is an uefi boottime service which is invoked by the efi stub in the kernel for getting random seed for kaslr. The routines are platform specific, and use the virtio-rng device on the platform to get random data. The feature can be enabled through the following config CONFIG_EFI_RNG_PROTOCOL Signed-off-by: Sughosh Ganu Changed SPDX header to use /* instead of //. Reviewed-by: Heinrich Schuchardt --- include/efi_rng.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 include/efi_rng.h (limited to 'include') diff --git a/include/efi_rng.h b/include/efi_rng.h new file mode 100644 index 0000000000..35f59678c7 --- /dev/null +++ b/include/efi_rng.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (c) 2019, Linaro Limited + */ + +#if !defined _EFI_RNG_H_ +#define _EFI_RNG_H_ + +#include +#include + +/* EFI random number generation protocol related GUID definitions */ +#define EFI_RNG_PROTOCOL_GUID \ + EFI_GUID(0x3152bca5, 0xeade, 0x433d, 0x86, 0x2e, \ + 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44) + +#define EFI_RNG_ALGORITHM_RAW \ + EFI_GUID(0xe43176d7, 0xb6e8, 0x4827, 0xb7, 0x84, \ + 0x7f, 0xfd, 0xc4, 0xb6, 0x85, 0x61) + +struct efi_rng_protocol { + efi_status_t (EFIAPI *get_info)(struct efi_rng_protocol *protocol, + efi_uintn_t *rng_algorithm_list_size, + efi_guid_t *rng_algorithm_list); + efi_status_t (EFIAPI *get_rng)(struct efi_rng_protocol *protocol, + efi_guid_t *rng_algorithm, + efi_uintn_t rng_value_length, uint8_t *rng_value); +}; + +efi_status_t platform_get_rng_device(struct udevice **dev); + +#endif /* _EFI_RNG_H_ */ -- cgit