// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2021 ARM Limited
 *
 * Check that the SVE 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_sve_vl(struct tdescr *td)
{
        int ret = prctl(PR_SVE_GET_VL);
        if (ret == -1)
                return false;

        vl = ret;

        return true;
}

static int sve_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 sve_context *sve;

        /* Get a signal context which should have a SVE 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, SVE_MAGIC, resv_sz, &offset);
        if (!head) {
                fprintf(stderr, "No SVE context\n");
                return 1;
        }
        sve = (struct sve_context *)head;

        if (sve->vl != vl) {
                fprintf(stderr, "sigframe VL %u, expected %u\n",
                        sve->vl, vl);
                return 1;
        } else {
                fprintf(stderr, "got expected VL %u\n", vl);
        }

        td->pass = 1;

        return 0;
}

struct tdescr tde = {
        .name = "SVE VL",
        .descr = "Check that we get the right SVE VL reported",
        .feats_required = FEAT_SVE,
        .timeout = 3,
        .init = get_sve_vl,
        .run = sve_vl,
};