blob: ee3c0ab043845f9dc62715da4e60afa829f8ccb2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Implementation of the memory encryption/decryption API.
*
* Since the low-level details of the operation depend on the
* Confidential Computing environment (e.g. pKVM, CCA, ...), this just
* acts as a top-level dispatcher to whatever hooks may have been
* registered.
*
* Author: Will Deacon <will@kernel.org>
* Copyright (C) 2024 Google LLC
*
* "Hello, boils and ghouls!"
*/
#include <linux/bug.h>
#include <linux/compiler.h>
#include <linux/err.h>
#include <linux/mm.h>
#include <asm/mem_encrypt.h>
static const struct arm64_mem_crypt_ops *crypt_ops;
int arm64_mem_crypt_ops_register(const struct arm64_mem_crypt_ops *ops)
{
if (WARN_ON(crypt_ops))
return -EBUSY;
crypt_ops = ops;
return 0;
}
int set_memory_encrypted(unsigned long addr, int numpages)
{
if (likely(!crypt_ops) || WARN_ON(!PAGE_ALIGNED(addr)))
return 0;
return crypt_ops->encrypt(addr, numpages);
}
EXPORT_SYMBOL_GPL(set_memory_encrypted);
int set_memory_decrypted(unsigned long addr, int numpages)
{
if (likely(!crypt_ops) || WARN_ON(!PAGE_ALIGNED(addr)))
return 0;
return crypt_ops->decrypt(addr, numpages);
}
EXPORT_SYMBOL_GPL(set_memory_decrypted);
|
