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