From patchwork Tue Aug 22 13:57:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13360969 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 157B3EE49AC for ; Tue, 22 Aug 2023 14:07:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236550AbjHVOHw (ORCPT ); Tue, 22 Aug 2023 10:07:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236003AbjHVOHt (ORCPT ); Tue, 22 Aug 2023 10:07:49 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 43866E54; Tue, 22 Aug 2023 07:07:26 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9E941657EB; Tue, 22 Aug 2023 14:06:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D456BC433C9; Tue, 22 Aug 2023 14:06:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692713174; bh=JCh6BoCIOxePO8zZIr/FO/CERnc7ZRYHEz9dpM/Qpg4=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=gtfQ2eW31f6EPU9vC6jaCRN6ETmWtVfR2JPeox/XV6bFDROD9T8s41V0GwPsdAem6 7LDDumT9QjrJcQxARUyWQrdQ8r2+ycpGiVtD9zW3j1SpgBIAdcfjlrnB5t078QEBJ/ DD4Xmy3gAmUpRwzV8Ub8mq5ZUD9oQF9PMPUQaf+wL1MnA7IXwexTme3IzgczB1tiTb ksrN+PpzLSpiSCNVo4IchLh16Xn+sbaI3igTa9UuBzQiWj7FjIxDIc0+1YhWosYP8D J6SXnLIBasAt6auBVfvnhR6k6LIrvw5dKo7urlKjiztwctP+QP9e2gd0bukiQOSW/e H582JM0FJVAqQ== From: Mark Brown Date: Tue, 22 Aug 2023 14:57:03 +0100 Subject: [PATCH v5 30/37] kselftest/arm64: Allow signals tests to specify an expected si_code MIME-Version: 1.0 Message-Id: <20230822-arm64-gcs-v5-30-9ef181dd6324@kernel.org> References: <20230822-arm64-gcs-v5-0-9ef181dd6324@kernel.org> In-Reply-To: <20230822-arm64-gcs-v5-0-9ef181dd6324@kernel.org> To: Catalin Marinas , Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Kees Cook , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy Cc: "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Mark Brown X-Mailer: b4 0.13-dev-034f2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2627; i=broonie@kernel.org; h=from:subject:message-id; bh=JCh6BoCIOxePO8zZIr/FO/CERnc7ZRYHEz9dpM/Qpg4=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBk5MAHcjsNO7smB/74EiLS77FhppKM7afGt2YS6K5l nBpEcyaJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZOTABwAKCRAk1otyXVSH0OtxB/ 4jPEVKdIAA0EEkMwF/8Q0alre/8aJFx1dJApbT94iIbPK0Y4+ycUhtoft7gWrnvejV/z1RAHs+lpww xZNxzxjleB1SeaTkhxO0iU5fieOPtAeMQZNkZCIAqM/LttFE3qr5bqvbLVqp0a9kADY1UcsSurmssy hDnQRZtJ8fbUNg7WzFAMkDvUqMwPkJnBHyduNhextwpvEXcDcrFoUGUb3Yj0qVbXqmrN+Jfx1oreqs y79wUbM4DcNg6qdoOPdeF0qSMk3mPWa0J+vornvymgF44G3A7Z0TfmyGnJt7El3KWQTFtyEShTbFOH 3fkRz7gP+qwymWNRCDfIDUHfizUtAq X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Currently we ignore si_code unless the expected signal is a SIGSEGV, in which case we enforce it being SEGV_ACCERR. Allow test cases to specify exactly which si_code should be generated so we can validate this, and test for other segfault codes. Signed-off-by: Mark Brown --- .../testing/selftests/arm64/signal/test_signals.h | 4 +++ .../selftests/arm64/signal/test_signals_utils.c | 29 ++++++++++++++-------- 2 files changed, 23 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/arm64/signal/test_signals.h b/tools/testing/selftests/arm64/signal/test_signals.h index 7ada43688c02..ee75a2c25ce7 100644 --- a/tools/testing/selftests/arm64/signal/test_signals.h +++ b/tools/testing/selftests/arm64/signal/test_signals.h @@ -71,6 +71,10 @@ struct tdescr { * Zero when no signal is expected on success */ int sig_ok; + /* + * expected si_code for sig_ok, or 0 to not check + */ + int sig_ok_code; /* signum expected on unsupported CPU features. */ int sig_unsupp; /* a timeout in second for test completion */ diff --git a/tools/testing/selftests/arm64/signal/test_signals_utils.c b/tools/testing/selftests/arm64/signal/test_signals_utils.c index 89ef95c1af0e..63deca32b0df 100644 --- a/tools/testing/selftests/arm64/signal/test_signals_utils.c +++ b/tools/testing/selftests/arm64/signal/test_signals_utils.c @@ -143,16 +143,25 @@ static bool handle_signal_ok(struct tdescr *td, "current->token ZEROED...test is probably broken!\n"); abort(); } - /* - * Trying to narrow down the SEGV to the ones generated by Kernel itself - * via arm64_notify_segfault(). This is a best-effort check anyway, and - * the si_code check may need to change if this aspect of the kernel - * ABI changes. - */ - if (td->sig_ok == SIGSEGV && si->si_code != SEGV_ACCERR) { - fprintf(stdout, - "si_code != SEGV_ACCERR...test is probably broken!\n"); - abort(); + if (td->sig_ok_code) { + if (si->si_code != td->sig_ok_code) { + fprintf(stdout, "si_code is %d not %d\n", + si->si_code, td->sig_ok_code); + abort(); + } + } else { + /* + * Trying to narrow down the SEGV to the ones + * generated by Kernel itself via + * arm64_notify_segfault(). This is a best-effort + * check anyway, and the si_code check may need to + * change if this aspect of the kernel ABI changes. + */ + if (td->sig_ok == SIGSEGV && si->si_code != SEGV_ACCERR) { + fprintf(stdout, + "si_code != SEGV_ACCERR...test is probably broken!\n"); + abort(); + } } td->pass = 1; /*