tools/testing/selftests/arm64/signal/testcases/sme_trap_no_sm.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2021 ARM Limited
 *
 * Verify that using a streaming mode instruction without enabling it
 * generates a SIGILL.
 */

#include <signal.h>
#include <ucontext.h>
#include <sys/prctl.h>

#include "test_signals_utils.h"
#include "testcases.h"

int sme_trap_no_sm_trigger(struct tdescr *td)
{
	/* SMSTART ZA ; ADDHA ZA0.S, P0/M, P0/M, Z0.S */
	asm volatile(".inst 0xd503457f ; .inst 0xc0900000");

	return 0;
}

int sme_trap_no_sm_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
{
	return 1;
}

struct tdescr tde = {
	.name = "SME trap without SM",
	.descr = "Check that we get a SIGILL if we use streaming mode without enabling it",
	.timeout = 3,
	.feats_required = FEAT_SME,   /* We need a SMSTART ZA */
	.sanity_disabled = true,
	.trigger = sme_trap_no_sm_trigger,
	.run = sme_trap_no_sm_run,
	.sig_ok = SIGILL,
};