Commit c1f67a19 authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas
Browse files

kselftest/arm64: signal: Check SVE signal frame shows expected vector length 



As a basic check that the SVE signal frame is being set up correctly
verify that the vector length in the signal frame is the vector length
that the process has.

Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20210819134245.13935-4-broonie@kernel.org


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent ace19b18

tools/testing/selftests/arm64/signal/.gitignore

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# SPDX-License-Identifier: GPL-2.0-only

mangle_*

fake_sigreturn_*

sve_*

!*.[ch]

tools/testing/selftests/arm64/signal/testcases/sve_vl.c

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// 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))

		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,

};