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https://github.com/AsahiLinux/u-boot
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6da9271af1
The Dependable Boot specification[1] describes the structure of the firmware accept and revert capsules. These are empty capsules which are used for signalling the acceptance or rejection of the updated firmware by the OS. Add support for generating these empty capsules. [1] - https://git.codelinaro.org/linaro/dependable-boot/mbfw/uploads/6f7ddfe3be24e18d4319e108a758d02e/mbfw.pdf Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org> Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
116 lines
2.9 KiB
C
116 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright 2021 Linaro Limited
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* Author: AKASHI Takahiro
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*
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* derived from efi.h and efi_api.h to make the file POSIX-compliant
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*/
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#ifndef _EFI_CAPSULE_H
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#define _EFI_CAPSULE_H
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#include <stdint.h>
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/*
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* Gcc's predefined attributes are not recognized by clang.
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*/
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#ifndef __packed
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#define __packed __attribute__((__packed__))
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#endif
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#ifndef __aligned
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#define __aligned(x) __attribute__((__aligned__(x)))
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#endif
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typedef struct {
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uint8_t b[16];
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} efi_guid_t __aligned(8);
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#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
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{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \
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((a) >> 24) & 0xff, \
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(b) & 0xff, ((b) >> 8) & 0xff, \
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(c) & 0xff, ((c) >> 8) & 0xff, \
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(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } }
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#define EFI_FIRMWARE_MANAGEMENT_CAPSULE_ID_GUID \
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EFI_GUID(0x6dcbd5ed, 0xe82d, 0x4c44, 0xbd, 0xa1, \
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0x71, 0x94, 0x19, 0x9a, 0xd9, 0x2a)
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#define EFI_CERT_TYPE_PKCS7_GUID \
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EFI_GUID(0x4aafd29d, 0x68df, 0x49ee, 0x8a, 0xa9, \
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0x34, 0x7d, 0x37, 0x56, 0x65, 0xa7)
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#define FW_ACCEPT_OS_GUID \
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EFI_GUID(0x0c996046, 0xbcc0, 0x4d04, 0x85, 0xec, \
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0xe1, 0xfc, 0xed, 0xf1, 0xc6, 0xf8)
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#define FW_REVERT_OS_GUID \
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EFI_GUID(0xacd58b4b, 0xc0e8, 0x475f, 0x99, 0xb5, \
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0x6b, 0x3f, 0x7e, 0x07, 0xaa, 0xf0)
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/* flags */
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#define CAPSULE_FLAGS_PERSIST_ACROSS_RESET 0x00010000
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struct efi_capsule_header {
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efi_guid_t capsule_guid;
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uint32_t header_size;
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uint32_t flags;
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uint32_t capsule_image_size;
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} __packed;
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struct efi_firmware_management_capsule_header {
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uint32_t version;
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uint16_t embedded_driver_count;
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uint16_t payload_item_count;
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uint32_t item_offset_list[];
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} __packed;
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/* image_capsule_support */
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#define CAPSULE_SUPPORT_AUTHENTICATION 0x0000000000000001
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struct efi_firmware_management_capsule_image_header {
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uint32_t version;
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efi_guid_t update_image_type_id;
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uint8_t update_image_index;
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uint8_t reserved[3];
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uint32_t update_image_size;
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uint32_t update_vendor_code_size;
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uint64_t update_hardware_instance;
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uint64_t image_capsule_support;
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} __packed;
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/**
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* win_certificate_uefi_guid - A certificate that encapsulates
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* a GUID-specific signature
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*
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* @hdr: Windows certificate header, cf. WIN_CERTIFICATE
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* @cert_type: Certificate type
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*/
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struct win_certificate_uefi_guid {
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struct {
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uint32_t dwLength;
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uint16_t wRevision;
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uint16_t wCertificateType;
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} hdr;
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efi_guid_t cert_type;
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} __packed;
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/**
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* efi_firmware_image_authentication - Capsule authentication method
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* descriptor
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*
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* This structure describes an authentication information for
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* a capsule with IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED set
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* and should be included as part of the capsule.
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* Only EFI_CERT_TYPE_PKCS7_GUID is accepted.
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*
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* @monotonic_count: Count to prevent replay
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* @auth_info: Authentication info
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*/
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struct efi_firmware_image_authentication {
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uint64_t monotonic_count;
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struct win_certificate_uefi_guid auth_info;
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} __packed;
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#endif /* _EFI_CAPSULE_H */
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