| 1 | /* |
| 2 | * AWS Nitro Secure Module (NSM) device |
| 3 | * |
| 4 | * Copyright (c) 2024 Dorjoy Chowdhury <dorjoychy111@gmail.com> |
| 5 | * |
| 6 | * This work is licensed under the terms of the GNU GPL, version 2 or |
| 7 | * (at your option) any later version. See the COPYING file in the |
| 8 | * top-level directory. |
| 9 | */ |
| 10 | |
| 11 | #ifndef QEMU_VIRTIO_NSM_H |
| 12 | #define QEMU_VIRTIO_NSM_H |
| 13 | |
| 14 | #include "crypto/hash.h" |
| 15 | #include "hw/virtio/virtio.h" |
| 16 | #include "qom/object.h" |
| 17 | |
| 18 | #define NSM_MAX_PCRS 32 |
| 19 | |
| 20 | #define TYPE_VIRTIO_NSM "virtio-nsm-device" |
| 21 | OBJECT_DECLARE_SIMPLE_TYPE(VirtIONSM, VIRTIO_NSM) |
| 22 | #define VIRTIO_NSM_GET_PARENT_CLASS(obj) \ |
| 23 | OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_NSM) |
| 24 | |
| 25 | struct PCRInfo { |
| 26 | bool locked; |
| 27 | uint8_t data[QCRYPTO_HASH_DIGEST_LEN_SHA384]; |
| 28 | }; |
| 29 | |
| 30 | struct VirtIONSM { |
| 31 | VirtIODevice parent_obj; |
| 32 | |
| 33 | /* Only one vq - guest puts request and response buffers on it */ |
| 34 | VirtQueue *vq; |
| 35 | |
| 36 | /* NSM State */ |
| 37 | uint16_t max_pcrs; |
| 38 | struct PCRInfo pcrs[NSM_MAX_PCRS]; |
| 39 | char *digest; |
| 40 | char *module_id; |
| 41 | uint8_t version_major; |
| 42 | uint8_t version_minor; |
| 43 | uint8_t version_patch; |
| 44 | |
| 45 | bool (*extend_pcr)(VirtIONSM *vnsm, int ind, uint8_t *data, uint16_t len); |
| 46 | void (*lock_pcr)(VirtIONSM *vnsm, int ind); |
| 47 | }; |
| 48 | |
| 49 | #endif |