cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sme_trap_no_sm.c (876B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 2021 ARM Limited
      4 *
      5 * Verify that using a streaming mode instruction without enabling it
      6 * generates a SIGILL.
      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
     16int sme_trap_no_sm_trigger(struct tdescr *td)
     17{
     18	/* SMSTART ZA ; ADDHA ZA0.S, P0/M, P0/M, Z0.S */
     19	asm volatile(".inst 0xd503457f ; .inst 0xc0900000");
     20
     21	return 0;
     22}
     23
     24int sme_trap_no_sm_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
     25{
     26	return 1;
     27}
     28
     29struct tdescr tde = {
     30	.name = "SME trap without SM",
     31	.descr = "Check that we get a SIGILL if we use streaming mode without enabling it",
     32	.timeout = 3,
     33	.feats_required = FEAT_SME,   /* We need a SMSTART ZA */
     34	.sanity_disabled = true,
     35	.trigger = sme_trap_no_sm_trigger,
     36	.run = sme_trap_no_sm_run,
     37	.sig_ok = SIGILL,
     38};