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