tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2016-20 Intel Corporation. */
3
4#include <stddef.h>
5#include "defines.h"
6
7/*
8 * Data buffer spanning two pages that will be placed first in .data
9 * segment. Even if not used internally the second page is needed by
10 * external test manipulating page permissions.
11 */
12static uint8_t encl_buffer[8192] = { 1 };
13
14static void *memcpy(void *dest, const void *src, size_t n)
15{
16 size_t i;
17
18 for (i = 0; i < n; i++)
19 ((char *)dest)[i] = ((char *)src)[i];
20
21 return dest;
22}
23
24static void do_encl_op_put_to_buf(void *op)
25{
26 struct encl_op_put_to_buf *op2 = op;
27
28 memcpy(&encl_buffer[0], &op2->value, 8);
29}
30
31static void do_encl_op_get_from_buf(void *op)
32{
33 struct encl_op_get_from_buf *op2 = op;
34
35 memcpy(&op2->value, &encl_buffer[0], 8);
36}
37
38static void do_encl_op_put_to_addr(void *_op)
39{
40 struct encl_op_put_to_addr *op = _op;
41
42 memcpy((void *)op->addr, &op->value, 8);
43}
44
45static void do_encl_op_get_from_addr(void *_op)
46{
47 struct encl_op_get_from_addr *op = _op;
48
49 memcpy(&op->value, (void *)op->addr, 8);
50}
51
52static void do_encl_op_nop(void *_op)
53{
54
55}
56
57void encl_body(void *rdi, void *rsi)
58{
59 const void (*encl_op_array[ENCL_OP_MAX])(void *) = {
60 do_encl_op_put_to_buf,
61 do_encl_op_get_from_buf,
62 do_encl_op_put_to_addr,
63 do_encl_op_get_from_addr,
64 do_encl_op_nop,
65 };
66
67 struct encl_op_header *op = (struct encl_op_header *)rdi;
68
69 if (op->type < ENCL_OP_MAX)
70 (*encl_op_array[op->type])(op);
71}