From patchwork Mon Aug 29 15:57:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 600977 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EEA47ECAAD5 for ; Mon, 29 Aug 2022 15:58:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229507AbiH2P6F (ORCPT ); Mon, 29 Aug 2022 11:58:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229900AbiH2P6E (ORCPT ); Mon, 29 Aug 2022 11:58:04 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4115597B1E for ; Mon, 29 Aug 2022 08:58:03 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id E2CEFB81103 for ; Mon, 29 Aug 2022 15:58:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 52517C433D7; Mon, 29 Aug 2022 15:57:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1661788680; bh=iho2djtRhDbfxqjfHfG89LpdrLeoz0UBV3Z/8njN3p0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AbSvpfD9dhwyc4Zv2M0U5Hy0+0I79y1CbZe6UkPQUOQsaHDN+eD3Qn9+OuzhK7g1f jMgoERTGDopSjfOIvv+GJxsyvbK3fvEHaR8/pJcQ+moQxD0kBN2EkazDEr250KmWJI uy4d+BloibUkOoYT0bOKVCLvtyiGzN7aJmw/uBPusJKf9qf9TL04BIXQjj5HtHP4ci fscbvEpEo+s0LX0U+ZYGjAUQMO9lxHbolLS+/KkHgAzQi0c71rxbYQun5/fodL4uKX SpUs5UlyuS9WWAf9inp5gidIBresvHtcu7nLUIRETCVareLTbX7/ilc2/kcL67zp+9 9Jm5FMTLVjSew== From: Mark Brown To: Catalin Marinas , Will Deacon , Shuah Khan , Shuah Khan Cc: linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, Mark Brown Subject: [PATCH v2 2/2] kselftest/arm64: Add a test for signal frames with ZA disabled Date: Mon, 29 Aug 2022 16:57:28 +0100 Message-Id: <20220829155728.854947-3-broonie@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220829155728.854947-1-broonie@kernel.org> References: <20220829155728.854947-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3267; i=broonie@kernel.org; h=from:subject; bh=iho2djtRhDbfxqjfHfG89LpdrLeoz0UBV3Z/8njN3p0=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBjDOHn3OrybsFfa//wTPFMuFZjpQMJkhLh0Qj9ttPh DI05uumJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYwzh5wAKCRAk1otyXVSH0L8UB/ 4gxod6F3fb3AyRaqG4K2lxvW92mQxHYR7OkzQvuSw9nE6NxiEmn41MqHlF7fMKtAXaXvwJPqUxcdBG 1b+5NHoTF+t6TwM4nEMxM+vXsdTcMX6WmX/xBauRS7DJ84Yc8ch0NZg2MC7Qs4MHJVmEJpffXWS8cv BdKxqeKvzvJMfGmfQxXkSPREgjIksveDnX2ngLop8l/ESaWwrz3Ex8n+RX/cGgG3GHlmWkffsMguqg yupkWeDT45Ql+ZN6jA3DzJs01RRgMmWnChPdRZL1HdMv5fd49kowmFXm8T58dkyKkg82rMhNDN1gYv K6T/DSrmdMbiSiKqsf9pnmAJCCRckc X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org When ZA is disabled there should be no register data in the ZA signal frame, add a test case which confirms that this is the case. Signed-off-by: Mark Brown --- .../arm64/signal/testcases/za_no_regs.c | 119 ++++++++++++++++++ 1 file changed, 119 insertions(+) create mode 100644 tools/testing/selftests/arm64/signal/testcases/za_no_regs.c diff --git a/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c b/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c new file mode 100644 index 000000000000..4d6f94b6178f --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/za_no_regs.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021 ARM Limited + * + * Verify that the ZA register context in signal frames is set up as + * expected. + */ + +#include +#include +#include + +#include "test_signals_utils.h" +#include "testcases.h" + +static union { + ucontext_t uc; + char buf[1024 * 128]; +} context; +static unsigned int vls[SVE_VQ_MAX]; +unsigned int nvls = 0; + +static bool sme_get_vls(struct tdescr *td) +{ + int vq, vl; + + /* + * Enumerate up to SME_VQ_MAX vector lengths + */ + for (vq = SVE_VQ_MAX; vq > 0; --vq) { + vl = prctl(PR_SME_SET_VL, vq * 16); + if (vl == -1) + return false; + + vl &= PR_SME_VL_LEN_MASK; + + /* Skip missing VLs */ + vq = sve_vq_from_vl(vl); + + vls[nvls++] = vl; + } + + /* We need at least one VL */ + if (nvls < 1) { + fprintf(stderr, "Only %d VL supported\n", nvls); + return false; + } + + return true; +} + +static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc, + unsigned int vl) +{ + size_t offset; + struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context); + struct za_context *za; + + fprintf(stderr, "Testing VL %d\n", vl); + + if (prctl(PR_SME_SET_VL, vl) != vl) { + fprintf(stderr, "Failed to set VL\n"); + return 1; + } + + /* + * Get a signal context which should have a SVE frame and registers + * in it. + */ + if (!get_current_context(td, &context.uc, sizeof(context))) + return 1; + + head = get_header(head, ZA_MAGIC, GET_BUF_RESV_SIZE(context), &offset); + if (!head) { + fprintf(stderr, "No ZA context\n"); + return 1; + } + + za = (struct za_context *)head; + if (za->vl != vl) { + fprintf(stderr, "Got VL %d, expected %d\n", za->vl, vl); + return 1; + } + + if (head->size != ZA_SIG_REGS_OFFSET) { + fprintf(stderr, "Context size %u, expected %lu\n", + head->size, ZA_SIG_REGS_OFFSET); + return 1; + } + + /* The actual size validation is done in get_current_context() */ + fprintf(stderr, "Got expected size %u and VL %d\n", + head->size, za->vl); + + return 0; +} + +static int sme_regs(struct tdescr *td, siginfo_t *si, ucontext_t *uc) +{ + int i; + + for (i = 0; i < nvls; i++) { + if (do_one_sme_vl(td, si, uc, vls[i])) + return 1; + } + + td->pass = 1; + + return 0; +} + +struct tdescr tde = { + .name = "ZA registers - ZA disabled", + .descr = "Check ZA context with ZA disabled", + .feats_required = FEAT_SME, + .timeout = 3, + .init = sme_get_vls, + .run = sme_regs, +};