87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2021 ARM Limited
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*
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* Verify that using an instruction not supported in streaming mode
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* traps when in streaming mode.
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*/
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#include <signal.h>
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#include <ucontext.h>
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#include <sys/prctl.h>
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#include "test_signals_utils.h"
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#include "testcases.h"
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static union {
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ucontext_t uc;
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char buf[1024 * 128];
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} context;
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static void enable_za(void)
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{
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/* smstart za; real data is TODO */
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asm volatile(".inst 0xd503457f" : : : );
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}
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int zt_regs_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
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{
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size_t offset;
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struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context);
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struct zt_context *zt;
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char *zeros;
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/*
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* Get a signal context which should have a ZT frame and registers
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* in it.
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*/
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enable_za();
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if (!get_current_context(td, &context.uc, sizeof(context)))
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return 1;
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head = get_header(head, ZT_MAGIC, GET_BUF_RESV_SIZE(context), &offset);
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if (!head) {
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fprintf(stderr, "No ZT context\n");
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return 1;
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}
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zt = (struct zt_context *)head;
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if (zt->nregs == 0) {
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fprintf(stderr, "Got context with no registers\n");
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return 1;
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}
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fprintf(stderr, "Got expected size %u for %d registers\n",
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head->size, zt->nregs);
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/* We didn't load any data into ZT so it should be all zeros */
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zeros = malloc(ZT_SIG_REGS_SIZE(zt->nregs));
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if (!zeros) {
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fprintf(stderr, "Out of memory, nregs=%u\n", zt->nregs);
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return 1;
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}
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memset(zeros, 0, ZT_SIG_REGS_SIZE(zt->nregs));
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if (memcmp(zeros, (char *)zt + ZT_SIG_REGS_OFFSET,
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ZT_SIG_REGS_SIZE(zt->nregs)) != 0) {
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fprintf(stderr, "ZT data invalid\n");
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free(zeros);
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return 1;
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}
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free(zeros);
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td->pass = 1;
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return 0;
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}
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struct tdescr tde = {
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.name = "ZT register data",
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.descr = "Validate that ZT is present and has data when ZA is enabled",
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.feats_required = FEAT_SME2,
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.timeout = 3,
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.sanity_disabled = true,
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.run = zt_regs_run,
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};
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