// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2015-2020 ARM Limited.
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* Original author: Dave Martin <Dave.Martin@arm.com>
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*/
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/auxv.h>
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#include <sys/prctl.h>
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#include <asm/sigcontext.h>
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#include "../../kselftest.h"
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int main(int argc, char **argv)
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{
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unsigned int vq;
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int vl;
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static unsigned int vqs[SVE_VQ_MAX];
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unsigned int nvqs = 0;
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ksft_print_header();
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ksft_set_plan(2);
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if (!(getauxval(AT_HWCAP) & HWCAP_SVE))
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ksft_exit_skip("SVE not available");
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/*
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* Enumerate up to SVE_VQ_MAX vector lengths
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*/
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for (vq = SVE_VQ_MAX; vq > 0; --vq) {
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vl = prctl(PR_SVE_SET_VL, vq * 16);
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if (vl == -1)
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ksft_exit_fail_msg("PR_SVE_SET_VL failed: %s (%d)\n",
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strerror(errno), errno);
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vl &= PR_SVE_VL_LEN_MASK;
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if (!sve_vl_valid(vl))
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ksft_exit_fail_msg("VL %d invalid\n", vl);
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vq = sve_vq_from_vl(vl);
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if (!(nvqs < SVE_VQ_MAX))
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ksft_exit_fail_msg("Too many VLs %u >= SVE_VQ_MAX\n",
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nvqs);
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vqs[nvqs++] = vq;
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}
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ksft_test_result_pass("Enumerated %d vector lengths\n", nvqs);
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ksft_test_result_pass("All vector lengths valid\n");
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/* Print out the vector lengths in ascending order: */
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while (nvqs--)
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ksft_print_msg("%u\n", 16 * vqs[nvqs]);
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ksft_exit_pass();
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}
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