Revision 16e604a437c89751dc626c9e90cf88ba93c5be64 authored by Alexandru Elisei on 07 August 2019, 09:53:20 UTC, committed by Marc Zyngier on 09 August 2019, 07:07:26 UTC
A HW mapped level sensitive interrupt asserted by a device will not be put
into the ap_list if it is disabled at the VGIC level. When it is enabled
again, it will be inserted into the ap_list and written to a list register
on guest entry regardless of the state of the device.

We could argue that this can also happen on real hardware, when the command
to enable the interrupt reached the GIC before the device had the chance to
de-assert the interrupt signal; however, we emulate the distributor and
redistributors in software and we can do better than that.

Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
1 parent c69509c
Raw File
engine.h
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Crypto engine API
 *
 * Copyright (c) 2016 Baolin Wang <baolin.wang@linaro.org>
 */
#ifndef _CRYPTO_ENGINE_H
#define _CRYPTO_ENGINE_H

#include <linux/crypto.h>
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <crypto/algapi.h>
#include <crypto/aead.h>
#include <crypto/akcipher.h>
#include <crypto/hash.h>
#include <crypto/skcipher.h>

#define ENGINE_NAME_LEN	30
/*
 * struct crypto_engine - crypto hardware engine
 * @name: the engine name
 * @idling: the engine is entering idle state
 * @busy: request pump is busy
 * @running: the engine is on working
 * @cur_req_prepared: current request is prepared
 * @list: link with the global crypto engine list
 * @queue_lock: spinlock to syncronise access to request queue
 * @queue: the crypto queue of the engine
 * @rt: whether this queue is set to run as a realtime task
 * @prepare_crypt_hardware: a request will soon arrive from the queue
 * so the subsystem requests the driver to prepare the hardware
 * by issuing this call
 * @unprepare_crypt_hardware: there are currently no more requests on the
 * queue so the subsystem notifies the driver that it may relax the
 * hardware by issuing this call
 * @kworker: kthread worker struct for request pump
 * @pump_requests: work struct for scheduling work to the request pump
 * @priv_data: the engine private data
 * @cur_req: the current request which is on processing
 */
struct crypto_engine {
	char			name[ENGINE_NAME_LEN];
	bool			idling;
	bool			busy;
	bool			running;
	bool			cur_req_prepared;

	struct list_head	list;
	spinlock_t		queue_lock;
	struct crypto_queue	queue;
	struct device		*dev;

	bool			rt;

	int (*prepare_crypt_hardware)(struct crypto_engine *engine);
	int (*unprepare_crypt_hardware)(struct crypto_engine *engine);

	struct kthread_worker           *kworker;
	struct kthread_work             pump_requests;

	void				*priv_data;
	struct crypto_async_request	*cur_req;
};

/*
 * struct crypto_engine_op - crypto hardware engine operations
 * @prepare__request: do some prepare if need before handle the current request
 * @unprepare_request: undo any work done by prepare_request()
 * @do_one_request: do encryption for current request
 */
struct crypto_engine_op {
	int (*prepare_request)(struct crypto_engine *engine,
			       void *areq);
	int (*unprepare_request)(struct crypto_engine *engine,
				 void *areq);
	int (*do_one_request)(struct crypto_engine *engine,
			      void *areq);
};

struct crypto_engine_ctx {
	struct crypto_engine_op op;
};

int crypto_transfer_ablkcipher_request_to_engine(struct crypto_engine *engine,
						 struct ablkcipher_request *req);
int crypto_transfer_aead_request_to_engine(struct crypto_engine *engine,
					   struct aead_request *req);
int crypto_transfer_akcipher_request_to_engine(struct crypto_engine *engine,
					       struct akcipher_request *req);
int crypto_transfer_hash_request_to_engine(struct crypto_engine *engine,
					       struct ahash_request *req);
int crypto_transfer_skcipher_request_to_engine(struct crypto_engine *engine,
					       struct skcipher_request *req);
void crypto_finalize_ablkcipher_request(struct crypto_engine *engine,
					struct ablkcipher_request *req, int err);
void crypto_finalize_aead_request(struct crypto_engine *engine,
				  struct aead_request *req, int err);
void crypto_finalize_akcipher_request(struct crypto_engine *engine,
				      struct akcipher_request *req, int err);
void crypto_finalize_hash_request(struct crypto_engine *engine,
				  struct ahash_request *req, int err);
void crypto_finalize_skcipher_request(struct crypto_engine *engine,
				      struct skcipher_request *req, int err);
int crypto_engine_start(struct crypto_engine *engine);
int crypto_engine_stop(struct crypto_engine *engine);
struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt);
int crypto_engine_exit(struct crypto_engine *engine);

#endif /* _CRYPTO_ENGINE_H */
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