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
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2023 ARM Limited
*
* Verify that the TPIDR2 register context in signal frames is restored.
*/
#include <signal.h>
#include <ucontext.h>
#include <sys/auxv.h>
#include <sys/prctl.h>
#include <unistd.h>
#include <asm/sigcontext.h>
#include "test_signals_utils.h"
#include "testcases.h"
#define SYS_TPIDR2 "S3_3_C13_C0_5"
static uint64_t get_tpidr2(void)
{
uint64_t val;
asm volatile (
"mrs %0, " SYS_TPIDR2 "\n"
: "=r"(val)
:
: "cc");
return val;
}
static void set_tpidr2(uint64_t val)
{
asm volatile (
"msr " SYS_TPIDR2 ", %0\n"
:
: "r"(val)
: "cc");
}
static uint64_t initial_tpidr2;
static bool save_tpidr2(struct tdescr *td)
{
initial_tpidr2 = get_tpidr2();
fprintf(stderr, "Initial TPIDR2: %lx\n", initial_tpidr2);
return true;
}
static int modify_tpidr2(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
{
uint64_t my_tpidr2 = get_tpidr2();
my_tpidr2++;
fprintf(stderr, "Setting TPIDR2 to %lx\n", my_tpidr2);
set_tpidr2(my_tpidr2);
return 0;
}
static void check_tpidr2(struct tdescr *td)
{
uint64_t tpidr2 = get_tpidr2();
td->pass = tpidr2 == initial_tpidr2;
if (td->pass)
fprintf(stderr, "TPIDR2 restored\n");
else
fprintf(stderr, "TPIDR2 was %lx but is now %lx\n",
initial_tpidr2, tpidr2);
}
struct tdescr tde = {
.name = "TPIDR2 restore",
.descr = "Validate that TPIDR2 is restored from the sigframe",
.feats_required = FEAT_SME,
.timeout = 3,
.sig_trig = SIGUSR1,
.init = save_tpidr2,
.run = modify_tpidr2,
.check_result = check_tpidr2,
};
|
