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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2021 ARM Limited
*
* Check that the SME vector length reported in signal contexts is the
* expected one.
*/
#include <signal.h>
#include <ucontext.h>
#include <sys/prctl.h>
#include "test_signals_utils.h"
#include "testcases.h"
struct fake_sigframe sf;
unsigned int vl;
static bool get_sme_vl(struct tdescr *td)
{
int ret = prctl(PR_SME_GET_VL);
if (ret == -1)
return false;
vl = ret;
return true;
}
static int sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
{
size_t resv_sz, offset;
struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf);
struct za_context *za;
/* Get a signal context which should have a ZA frame in it */
if (!get_current_context(td, &sf.uc, sizeof(sf.uc)))
return 1;
resv_sz = GET_SF_RESV_SIZE(sf);
head = get_header(head, ZA_MAGIC, resv_sz, &offset);
if (!head) {
fprintf(stderr, "No ZA context\n");
return 1;
}
za = (struct za_context *)head;
if (za->vl != vl) {
fprintf(stderr, "ZA sigframe VL %u, expected %u\n",
za->vl, vl);
return 1;
} else {
fprintf(stderr, "got expected VL %u\n", vl);
}
td->pass = 1;
return 0;
}
struct tdescr tde = {
.name = "SME VL",
.descr = "Check that we get the right SME VL reported",
.feats_required = FEAT_SME,
.timeout = 3,
.init = get_sme_vl,
.run = sme_vl,
};
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