From patchwork Thu Oct 26 12:44:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13437569 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 56C2EC25B67 for ; Thu, 26 Oct 2023 12:48:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345162AbjJZMsU (ORCPT ); Thu, 26 Oct 2023 08:48:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345078AbjJZMrq (ORCPT ); Thu, 26 Oct 2023 08:47:46 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C365ED6C; Thu, 26 Oct 2023 05:47:32 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7D365C433D9; Thu, 26 Oct 2023 12:47:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1698324452; bh=irtBwegYB+DXpSWW34B5isPMLTYQBsVR3AqcPDPAR5U=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=q7eesor6jinYv1yB55Uk+bcBdg+AJLhjm5ZLF6zBH8KhRoRygSwflSE11ZnmIg8LT HKgn7xLfkovVka3xpV/ctbXpN/RqI2ol9gjPb0kBwz3XVC1FIHCWKNiVhapdKa34JS 0ty5Qt0NdqywOb9aQY0Du0PEo2JuVTUQSpnX0+BMB4gpRcL2n0CcGpZnuKZZGPvJu6 p80vrWDCMXegTUBI59EhRRZoxo/TfWSW27te7L516UJ018JMK5SR3hFQ89f/G3lyHb VDhbqciu58fMVdlwI+c7Uajrj4SIAXfHE0oal89MKEUUwwWRIgg1i/OoQcNaT0//oI Mu54FxoYuiSUg== From: Mark Brown Date: Thu, 26 Oct 2023 13:44:32 +0100 Subject: [PATCH 18/21] kselftest/arm64: Add basic FPMR test MIME-Version: 1.0 Message-Id: <20231026-arm64-2023-dpisa-v1-18-8470dd989bb2@kernel.org> References: <20231026-arm64-2023-dpisa-v1-0-8470dd989bb2@kernel.org> In-Reply-To: <20231026-arm64-2023-dpisa-v1-0-8470dd989bb2@kernel.org> To: Catalin Marinas , Will Deacon , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Jonathan Corbet , Shuah Khan Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Mark Brown X-Mailer: b4 0.13-dev-0438c X-Developer-Signature: v=1; a=openpgp-sha256; l=2813; i=broonie@kernel.org; h=from:subject:message-id; bh=irtBwegYB+DXpSWW34B5isPMLTYQBsVR3AqcPDPAR5U=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBlOl+iCJdeV2fsyrb2Goi5LFUKDp5cDy2hkYV1hTmP NxdgV+qJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZTpfogAKCRAk1otyXVSH0G9uB/ 9Uk6ue6AiOXc9U24n6Z1wmQoT6SRGNy0Sw6uyrZBwn8z/osMnkYzrq6zTxCgXlkcFeK9A+saCjA+qf Yo8GH1Hzhm8Ca1Jry/vNstZVkyQ2MYQtn4fc6B4zxYyeJ/G9BiQnctdjJYMLxfl4cIUr+t0KghbqIB ya59WP3L0gCeBnXe2PGC2uWZoOUJl8+krxUeDaWmvOjgSqbGkIk6VWrqk/rm/scVjAc+gFTn+e/KdC xCPNkJa/ttYorYFaFnjCtRQ91ww7BShiiCxRZqFiaSVhm7jUMsUxz2BZORzA0e5WeFBosKyVtYogmU JLQrK2cV9JJoSpjaqeMFfmBEH40Fpc X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Verify that a FPMR frame is generated on systems that support FPMR and not generated otherwise. Signed-off-by: Mark Brown --- tools/testing/selftests/arm64/signal/.gitignore | 1 + .../arm64/signal/testcases/fpmr_siginfo.c | 82 ++++++++++++++++++++++ 2 files changed, 83 insertions(+) diff --git a/tools/testing/selftests/arm64/signal/.gitignore b/tools/testing/selftests/arm64/signal/.gitignore index 839e3a252629..1ce5b5eac386 100644 --- a/tools/testing/selftests/arm64/signal/.gitignore +++ b/tools/testing/selftests/arm64/signal/.gitignore @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only mangle_* fake_sigreturn_* +fpmr_* sme_* ssve_* sve_* diff --git a/tools/testing/selftests/arm64/signal/testcases/fpmr_siginfo.c b/tools/testing/selftests/arm64/signal/testcases/fpmr_siginfo.c new file mode 100644 index 000000000000..e9d24685e741 --- /dev/null +++ b/tools/testing/selftests/arm64/signal/testcases/fpmr_siginfo.c @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2023 ARM Limited + * + * Verify that the FPMR register context in signal frames is set up as + * expected. + */ + +#include +#include +#include +#include +#include +#include + +#include "test_signals_utils.h" +#include "testcases.h" + +static union { + ucontext_t uc; + char buf[1024 * 128]; +} context; + +#define SYS_FPMR "S3_3_C4_C4_2" + +static uint64_t get_fpmr(void) +{ + uint64_t val; + + asm volatile ( + "mrs %0, " SYS_FPMR "\n" + : "=r"(val) + : + : "cc"); + + return val; +} + +int fpmr_present(struct tdescr *td, siginfo_t *si, ucontext_t *uc) +{ + struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context); + struct fpmr_context *fpmr_ctx; + size_t offset; + bool in_sigframe; + bool have_fpmr; + __u64 orig_fpmr; + + have_fpmr = getauxval(AT_HWCAP2) & HWCAP2_FPMR; + if (have_fpmr) + orig_fpmr = get_fpmr(); + + if (!get_current_context(td, &context.uc, sizeof(context))) + return 1; + + fpmr_ctx = (struct fpmr_context *) + get_header(head, FPMR_MAGIC, td->live_sz, &offset); + + in_sigframe = fpmr_ctx != NULL; + + fprintf(stderr, "FPMR sigframe %s on system %s FPMR\n", + in_sigframe ? "present" : "absent", + have_fpmr ? "with" : "without"); + + td->pass = (in_sigframe == have_fpmr); + + if (have_fpmr && fpmr_ctx) { + if (fpmr_ctx->fpmr != orig_fpmr) { + fprintf(stderr, "FPMR in frame is %llx, was %llx\n", + fpmr_ctx->fpmr, orig_fpmr); + td->pass = false; + } + } + + return 0; +} + +struct tdescr tde = { + .name = "FPMR", + .descr = "Validate that FPMR is present as expected", + .timeout = 3, + .run = fpmr_present, +};