1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2021 ARM Limited
4  *
5  * Verify that using an instruction not supported in streaming mode
6  * traps when in streaming mode.
7  */
8 
9 #include <signal.h>
10 #include <ucontext.h>
11 #include <sys/prctl.h>
12 
13 #include "test_signals_utils.h"
14 #include "testcases.h"
15 
16 static union {
17 	ucontext_t uc;
18 	char buf[1024 * 128];
19 } context;
20 
21 int zt_no_regs_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
22 {
23 	size_t offset;
24 	struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context);
25 
26 	/*
27 	 * Get a signal context which should not have a ZT frame and
28 	 * registers in it.
29 	 */
30 	if (!get_current_context(td, &context.uc, sizeof(context)))
31 		return 1;
32 
33 	head = get_header(head, ZT_MAGIC, GET_BUF_RESV_SIZE(context), &offset);
34 	if (head) {
35 		fprintf(stderr, "Got unexpected ZT context\n");
36 		return 1;
37 	}
38 
39 	td->pass = 1;
40 
41 	return 0;
42 }
43 
44 struct tdescr tde = {
45 	.name = "ZT register data not present",
46 	.descr = "Validate that ZT is not present when ZA is disabled",
47 	.feats_required = FEAT_SME2,
48 	.timeout = 3,
49 	.sanity_disabled = true,
50 	.run = zt_no_regs_run,
51 };
52