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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cqhci-crypto.h (1047B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * CQHCI crypto engine (inline encryption) support
      4 *
      5 * Copyright 2020 Google LLC
      6 */
      7
      8#ifndef LINUX_MMC_CQHCI_CRYPTO_H
      9#define LINUX_MMC_CQHCI_CRYPTO_H
     10
     11#include <linux/mmc/host.h>
     12
     13#include "cqhci.h"
     14
     15#ifdef CONFIG_MMC_CRYPTO
     16
     17int cqhci_crypto_init(struct cqhci_host *host);
     18
     19/*
     20 * Returns the crypto bits that should be set in bits 64-127 of the
     21 * task descriptor.
     22 */
     23static inline u64 cqhci_crypto_prep_task_desc(struct mmc_request *mrq)
     24{
     25	if (!mrq->crypto_ctx)
     26		return 0;
     27
     28	/* We set max_dun_bytes_supported=4, so all DUNs should be 32-bit. */
     29	WARN_ON_ONCE(mrq->crypto_ctx->bc_dun[0] > U32_MAX);
     30
     31	return CQHCI_CRYPTO_ENABLE_BIT |
     32	       CQHCI_CRYPTO_KEYSLOT(mrq->crypto_key_slot) |
     33	       mrq->crypto_ctx->bc_dun[0];
     34}
     35
     36#else /* CONFIG_MMC_CRYPTO */
     37
     38static inline int cqhci_crypto_init(struct cqhci_host *host)
     39{
     40	return 0;
     41}
     42
     43static inline u64 cqhci_crypto_prep_task_desc(struct mmc_request *mrq)
     44{
     45	return 0;
     46}
     47
     48#endif /* !CONFIG_MMC_CRYPTO */
     49
     50#endif /* LINUX_MMC_CQHCI_CRYPTO_H */