cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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virtio_crypto_common.h (4213B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/* Common header for Virtio crypto device.
      3 *
      4 * Copyright 2016 HUAWEI TECHNOLOGIES CO., LTD.
      5 */
      6
      7#ifndef _VIRTIO_CRYPTO_COMMON_H
      8#define _VIRTIO_CRYPTO_COMMON_H
      9
     10#include <linux/virtio.h>
     11#include <linux/crypto.h>
     12#include <linux/spinlock.h>
     13#include <crypto/aead.h>
     14#include <crypto/aes.h>
     15#include <crypto/engine.h>
     16#include <uapi/linux/virtio_crypto.h>
     17
     18
     19/* Internal representation of a data virtqueue */
     20struct data_queue {
     21	/* Virtqueue associated with this send _queue */
     22	struct virtqueue *vq;
     23
     24	/* To protect the vq operations for the dataq */
     25	spinlock_t lock;
     26
     27	/* Name of the tx queue: dataq.$index */
     28	char name[32];
     29
     30	struct crypto_engine *engine;
     31};
     32
     33struct virtio_crypto {
     34	struct virtio_device *vdev;
     35	struct virtqueue *ctrl_vq;
     36	struct data_queue *data_vq;
     37
     38	/* To protect the vq operations for the controlq */
     39	spinlock_t ctrl_lock;
     40
     41	/* Maximum of data queues supported by the device */
     42	u32 max_data_queues;
     43
     44	/* Number of queue currently used by the driver */
     45	u32 curr_queue;
     46
     47	/*
     48	 * Specifies the services mask which the device support,
     49	 * see VIRTIO_CRYPTO_SERVICE_*
     50	 */
     51	u32 crypto_services;
     52
     53	/* Detailed algorithms mask */
     54	u32 cipher_algo_l;
     55	u32 cipher_algo_h;
     56	u32 hash_algo;
     57	u32 mac_algo_l;
     58	u32 mac_algo_h;
     59	u32 aead_algo;
     60	u32 akcipher_algo;
     61
     62	/* Maximum length of cipher key */
     63	u32 max_cipher_key_len;
     64	/* Maximum length of authenticated key */
     65	u32 max_auth_key_len;
     66	/* Maximum size of per request */
     67	u64 max_size;
     68
     69	unsigned long status;
     70	atomic_t ref_count;
     71	struct list_head list;
     72	struct module *owner;
     73	uint8_t dev_id;
     74
     75	/* Does the affinity hint is set for virtqueues? */
     76	bool affinity_hint_set;
     77};
     78
     79struct virtio_crypto_sym_session_info {
     80	/* Backend session id, which come from the host side */
     81	__u64 session_id;
     82};
     83
     84/*
     85 * Note: there are padding fields in request, clear them to zero before
     86 *       sending to host to avoid to divulge any information.
     87 * Ex, virtio_crypto_ctrl_request::ctrl::u::destroy_session::padding[48]
     88 */
     89struct virtio_crypto_ctrl_request {
     90	struct virtio_crypto_op_ctrl_req ctrl;
     91	struct virtio_crypto_session_input input;
     92	struct virtio_crypto_inhdr ctrl_status;
     93	struct completion compl;
     94};
     95
     96struct virtio_crypto_request;
     97typedef void (*virtio_crypto_data_callback)
     98		(struct virtio_crypto_request *vc_req, int len);
     99
    100struct virtio_crypto_request {
    101	uint8_t status;
    102	struct virtio_crypto_op_data_req *req_data;
    103	struct scatterlist **sgs;
    104	struct data_queue *dataq;
    105	virtio_crypto_data_callback alg_cb;
    106};
    107
    108int virtcrypto_devmgr_add_dev(struct virtio_crypto *vcrypto_dev);
    109struct list_head *virtcrypto_devmgr_get_head(void);
    110void virtcrypto_devmgr_rm_dev(struct virtio_crypto *vcrypto_dev);
    111struct virtio_crypto *virtcrypto_devmgr_get_first(void);
    112int virtcrypto_dev_in_use(struct virtio_crypto *vcrypto_dev);
    113int virtcrypto_dev_get(struct virtio_crypto *vcrypto_dev);
    114void virtcrypto_dev_put(struct virtio_crypto *vcrypto_dev);
    115int virtcrypto_dev_started(struct virtio_crypto *vcrypto_dev);
    116bool virtcrypto_algo_is_supported(struct virtio_crypto *vcrypto_dev,
    117				  uint32_t service,
    118				  uint32_t algo);
    119struct virtio_crypto *virtcrypto_get_dev_node(int node,
    120					      uint32_t service,
    121					      uint32_t algo);
    122int virtcrypto_dev_start(struct virtio_crypto *vcrypto);
    123void virtcrypto_dev_stop(struct virtio_crypto *vcrypto);
    124int virtio_crypto_skcipher_crypt_req(
    125	struct crypto_engine *engine, void *vreq);
    126
    127void
    128virtcrypto_clear_request(struct virtio_crypto_request *vc_req);
    129
    130static inline int virtio_crypto_get_current_node(void)
    131{
    132	int cpu, node;
    133
    134	cpu = get_cpu();
    135	node = topology_physical_package_id(cpu);
    136	put_cpu();
    137
    138	return node;
    139}
    140
    141int virtio_crypto_skcipher_algs_register(struct virtio_crypto *vcrypto);
    142void virtio_crypto_skcipher_algs_unregister(struct virtio_crypto *vcrypto);
    143int virtio_crypto_akcipher_algs_register(struct virtio_crypto *vcrypto);
    144void virtio_crypto_akcipher_algs_unregister(struct virtio_crypto *vcrypto);
    145int virtio_crypto_ctrl_vq_request(struct virtio_crypto *vcrypto, struct scatterlist *sgs[],
    146				  unsigned int out_sgs, unsigned int in_sgs,
    147				  struct virtio_crypto_ctrl_request *vc_ctrl_req);
    148
    149#endif /* _VIRTIO_CRYPTO_COMMON_H */