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_za.c (707B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 2021 ARM Limited
      4 *
      5 * Verify that accessing ZA without enabling it generates a SIGILL.
      6 */
      7
      8#include <signal.h>
      9#include <ucontext.h>
     10#include <sys/prctl.h>
     11
     12#include "test_signals_utils.h"
     13#include "testcases.h"
     14
     15int sme_trap_za_trigger(struct tdescr *td)
     16{
     17	/* ZERO ZA */
     18	asm volatile(".inst 0xc00800ff");
     19
     20	return 0;
     21}
     22
     23int sme_trap_za_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
     24{
     25	return 1;
     26}
     27
     28struct tdescr tde = {
     29	.name = "SME ZA trap",
     30	.descr = "Check that we get a SIGILL if we access ZA without enabling",
     31	.timeout = 3,
     32	.sanity_disabled = true,
     33	.trigger = sme_trap_za_trigger,
     34	.run = sme_trap_za_run,
     35	.sig_ok = SIGILL,
     36};