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
107
108
109
110
111
112
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2021 ARM Limited
*
* Verify that the streaming SVE register context in signal frames is
* set up as expected.
*/
#include <kselftest.h>
#include <signal.h>
#include <ucontext.h>
#include <sys/prctl.h>
#include "test_signals_utils.h"
#include "sve_helpers.h"
#include "testcases.h"
static union {
ucontext_t uc;
char buf[1024 * 64];
} context;
static bool sme_get_vls(struct tdescr *td)
{
int res = sve_fill_vls(VLS_USE_SME, 1);
if (!res)
return true;
if (res == KSFT_SKIP)
td->result = KSFT_SKIP;
return false;
}
static void setup_ssve_regs(void)
{
/* smstart sm; real data is TODO */
asm volatile(".inst 0xd503437f" : : : );
}
static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc,
unsigned int vl)
{
size_t offset;
struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context);
struct sve_context *ssve;
int ret;
fprintf(stderr, "Testing VL %d\n", vl);
ret = prctl(PR_SME_SET_VL, vl);
if (ret != vl) {
fprintf(stderr, "Failed to set VL, got %d\n", ret);
return 1;
}
/*
* Get a signal context which should have a SVE frame and registers
* in it.
*/
setup_ssve_regs();
if (!get_current_context(td, &context.uc, sizeof(context)))
return 1;
head = get_header(head, SVE_MAGIC, GET_BUF_RESV_SIZE(context),
&offset);
if (!head) {
fprintf(stderr, "No SVE context\n");
return 1;
}
ssve = (struct sve_context *)head;
if (ssve->vl != vl) {
fprintf(stderr, "Got VL %d, expected %d\n", ssve->vl, vl);
return 1;
}
/* The actual size validation is done in get_current_context() */
fprintf(stderr, "Got expected size %u and VL %d\n",
head->size, ssve->vl);
return 0;
}
static int sme_regs(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
{
int i;
for (i = 0; i < nvls; i++) {
if (do_one_sme_vl(td, si, uc, vls[i]))
return 1;
}
td->pass = 1;
return 0;
}
struct tdescr tde = {
.name = "Streaming SVE registers",
.descr = "Check that we get the right Streaming SVE registers reported",
/*
* We shouldn't require FA64 but things like memset() used in the
* helpers might use unsupported instructions so for now disable
* the test unless we've got the full instruction set.
*/
.feats_required = FEAT_SME | FEAT_SME_FA64,
.timeout = 3,
.init = sme_get_vls,
.run = sme_regs,
};
|
