Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Implementation of the memory encryption/decryption API.
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*
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* Since the low-level details of the operation depend on the
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* Confidential Computing environment (e.g. pKVM, CCA, ...), this just
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* acts as a top-level dispatcher to whatever hooks may have been
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* registered.
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*
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* Author: Will Deacon <will@kernel.org>
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* Copyright (C) 2024 Google LLC
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*
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* "Hello, boils and ghouls!"
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*/
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#include <linux/bug.h>
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#include <linux/compiler.h>
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#include <linux/err.h>
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#include <linux/mm.h>
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#include <asm/mem_encrypt.h>
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static const struct arm64_mem_crypt_ops *crypt_ops;
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int arm64_mem_crypt_ops_register(const struct arm64_mem_crypt_ops *ops)
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{
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if (WARN_ON(crypt_ops))
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return -EBUSY;
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crypt_ops = ops;
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return 0;
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}
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int set_memory_encrypted(unsigned long addr, int numpages)
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{
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if (likely(!crypt_ops) || WARN_ON(!PAGE_ALIGNED(addr)))
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return 0;
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return crypt_ops->encrypt(addr, numpages);
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}
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EXPORT_SYMBOL_GPL(set_memory_encrypted);
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int set_memory_decrypted(unsigned long addr, int numpages)
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{
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if (likely(!crypt_ops) || WARN_ON(!PAGE_ALIGNED(addr)))
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return 0;
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return crypt_ops->decrypt(addr, numpages);
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}
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EXPORT_SYMBOL_GPL(set_memory_decrypted);
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