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
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* POWER Dynamic Execution Control Facility (DEXCR)
*
* This header file contains helper functions and macros
* required for all the DEXCR related test cases.
*/
#ifndef _SELFTESTS_POWERPC_DEXCR_DEXCR_H
#define _SELFTESTS_POWERPC_DEXCR_DEXCR_H
#include <stdbool.h>
#include <sys/prctl.h>
#include <sys/types.h>
#include "reg.h"
#define DEXCR_PR_BIT(aspect) __MASK(63 - (32 + (aspect)))
#define DEXCR_PR_SBHE DEXCR_PR_BIT(0)
#define DEXCR_PR_IBRTPD DEXCR_PR_BIT(3)
#define DEXCR_PR_SRAPD DEXCR_PR_BIT(4)
#define DEXCR_PR_NPHIE DEXCR_PR_BIT(5)
#define PPC_RAW_HASH_ARGS(b, i, a) \
((((i) >> 3) & 0x1F) << 21 | (a) << 16 | (b) << 11 | (((i) >> 8) & 0x1))
#define PPC_RAW_HASHST(b, i, a) \
str(.long (0x7C0005A4 | PPC_RAW_HASH_ARGS(b, i, a));)
#define PPC_RAW_HASHCHK(b, i, a) \
str(.long (0x7C0005E4 | PPC_RAW_HASH_ARGS(b, i, a));)
struct dexcr_aspect {
const char *name; /* Short display name */
const char *opt; /* Option name for chdexcr */
const char *desc; /* Expanded aspect meaning */
unsigned int index; /* Aspect bit index in DEXCR */
unsigned long prctl; /* 'which' value for get/set prctl */
};
static const struct dexcr_aspect aspects[] = {
{
.name = "SBHE",
.opt = "sbhe",
.desc = "Speculative branch hint enable",
.index = 0,
.prctl = PR_PPC_DEXCR_SBHE,
},
{
.name = "IBRTPD",
.opt = "ibrtpd",
.desc = "Indirect branch recurrent target prediction disable",
.index = 3,
.prctl = PR_PPC_DEXCR_IBRTPD,
},
{
.name = "SRAPD",
.opt = "srapd",
.desc = "Subroutine return address prediction disable",
.index = 4,
.prctl = PR_PPC_DEXCR_SRAPD,
},
{
.name = "NPHIE",
.opt = "nphie",
.desc = "Non-privileged hash instruction enable",
.index = 5,
.prctl = PR_PPC_DEXCR_NPHIE,
},
{
.name = "PHIE",
.opt = "phie",
.desc = "Privileged hash instruction enable",
.index = 6,
.prctl = -1,
},
};
bool dexcr_exists(void);
bool pr_dexcr_aspect_supported(unsigned long which);
bool pr_dexcr_aspect_editable(unsigned long which);
int pr_get_dexcr(unsigned long pr_aspect);
int pr_set_dexcr(unsigned long pr_aspect, unsigned long ctrl);
unsigned int pr_which_to_aspect(unsigned long which);
bool hashchk_triggers(void);
enum dexcr_source {
DEXCR, /* Userspace DEXCR value */
HDEXCR, /* Hypervisor enforced DEXCR value */
EFFECTIVE, /* Bitwise OR of UDEXCR and ENFORCED DEXCR bits */
};
unsigned int get_dexcr(enum dexcr_source source);
void await_child_success(pid_t pid);
void hashst(unsigned long lr, void *sp);
void hashchk(unsigned long lr, void *sp);
void do_bad_hashchk(void);
#endif /* _SELFTESTS_POWERPC_DEXCR_DEXCR_H */
|
