From patchwork Tue Jan 25 00:11:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 12723242 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 2777FC4167D for ; Tue, 25 Jan 2022 03:36:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S3415412AbiAYDgA (ORCPT ); Mon, 24 Jan 2022 22:36:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37406 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S3421170AbiAYC0Y (ORCPT ); Mon, 24 Jan 2022 21:26:24 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CE4ABC08ED7F for ; Mon, 24 Jan 2022 16:17:31 -0800 (PST) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 6B9C76154A for ; Tue, 25 Jan 2022 00:17:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 76DD1C340EC; Tue, 25 Jan 2022 00:17:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643069850; bh=Sg4MO9YZQcbV+koV+CMJiKCz9E7cFOVY1Zqkeaooq10=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XWIIOigkYSdPlUitm8qIbgFSM4CRO09ZOZ9XnNx2hgOOvh58igZfgQxMt8vveGJtd tEuusNNL18plYItevslerVxWd8f59CpZOc2BQYt+GCtfMQFAnD9DtU1rhYsQIy2ieG JhmRlLuAg9vbU3itir8QGYyReJzcOfOtgILMoAkYICCSXL6pa8P/hOR0B+KBHbgvG/ 0Cwsc5scu+UIexqR5uIzTz4+ANcT2K833wpNT36XK6BrpzHwu+vL6Tg2R+RaaUrkvz CkHDCmS6qysRxdqUVA4dxxl2j9pLivy7T3MJsPyLiNQ6Sa2fSYui8bzQSdQZUmkSSf GglatLXkNzaIg== From: Mark Brown To: Catalin Marinas , Will Deacon , Marc Zyngier , Shuah Khan , Shuah Khan Cc: Alan Hayward , Luis Machado , Salil Akerkar , Basant Kumar Dwivedi , Szabolcs Nagy , James Morse , Alexandru Elisei , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, kvmarm@lists.cs.columbia.edu, Mark Brown Subject: [PATCH v8 33/38] kselftest/arm64: signal: Handle ZA signal context in core code Date: Tue, 25 Jan 2022 00:11:09 +0000 Message-Id: <20220125001114.193425-34-broonie@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220125001114.193425-1-broonie@kernel.org> References: <20220125001114.193425-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3220; h=from:subject; bh=Sg4MO9YZQcbV+koV+CMJiKCz9E7cFOVY1Zqkeaooq10=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBh70AbvpNMvy7SNGRTsSL8cEuGKairNIi9+eypDo1i pNtel2SJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYe9AGwAKCRAk1otyXVSH0LsvB/ sHri1V/nTg59Vmk0U0iOBI1lsVyYRPXCBv9SOrvqOiGl66n4Vbc3eZPjyP0fpD6e5Q0GVAy6zIzJNW /Hc2/IAYSCdnkI+lsm+zvwOWKVrFQG4XxJ+WBLaQYfumC/FFJ7LAQf9mgVP2Znx14ouucu2jPEDN8G pZBiajzqLjp5QYb3ivZmyZ1CCtCDgd6LUqikHW1xL9sWrKVyZiaufO3QnMEkLcB8rBQ5B31BkxosCZ mrJdtD4Vl4psWiDZf1uNYQmxIeIxT3ZiolF6RO9/kHlsOBSpUsuS68L1F+oU0blx9tsJU5V9inXXCo 318/Onp5nazsaSKnurYvEqbP5BCwCT X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org As part of the generic code for signal handling test cases we parse all signal frames to make sure they have at least the basic form we expect and that there are no unexpected frames present in the signal context. Add coverage of the ZA signal frame to this code. Signed-off-by: Mark Brown --- .../arm64/signal/testcases/testcases.c | 36 +++++++++++++++++++ .../arm64/signal/testcases/testcases.h | 3 +- 2 files changed, 38 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/arm64/signal/testcases/testcases.c b/tools/testing/selftests/arm64/signal/testcases/testcases.c index 8c2a57fc2f9c..84c36bee4d82 100644 --- a/tools/testing/selftests/arm64/signal/testcases/testcases.c +++ b/tools/testing/selftests/arm64/signal/testcases/testcases.c @@ -75,6 +75,31 @@ bool validate_sve_context(struct sve_context *sve, char **err) return true; } +bool validate_za_context(struct za_context *za, char **err) +{ + /* Size will be rounded up to a multiple of 16 bytes */ + size_t regs_size + = ((ZA_SIG_CONTEXT_SIZE(sve_vq_from_vl(za->vl)) + 15) / 16) * 16; + + if (!za || !err) + return false; + + /* Either a bare za_context or a za_context followed by regs data */ + if ((za->head.size != sizeof(struct za_context)) && + (za->head.size != regs_size)) { + *err = "bad size for ZA context"; + return false; + } + + if (!sve_vl_valid(za->vl)) { + *err = "SME VL in ZA context invalid"; + + return false; + } + + return true; +} + bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err) { bool terminated = false; @@ -82,6 +107,7 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err) int flags = 0; struct extra_context *extra = NULL; struct sve_context *sve = NULL; + struct za_context *za = NULL; struct _aarch64_ctx *head = (struct _aarch64_ctx *)uc->uc_mcontext.__reserved; @@ -120,6 +146,13 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err) sve = (struct sve_context *)head; flags |= SVE_CTX; break; + case ZA_MAGIC: + if (flags & ZA_CTX) + *err = "Multiple ZA_MAGIC"; + /* Size is validated in validate_za_context() */ + za = (struct za_context *)head; + flags |= ZA_CTX; + break; case EXTRA_MAGIC: if (flags & EXTRA_CTX) *err = "Multiple EXTRA_MAGIC"; @@ -165,6 +198,9 @@ bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err) if (flags & SVE_CTX) if (!validate_sve_context(sve, err)) return false; + if (flags & ZA_CTX) + if (!validate_za_context(za, err)) + return false; head = GET_RESV_NEXT_HEAD(head); } diff --git a/tools/testing/selftests/arm64/signal/testcases/testcases.h b/tools/testing/selftests/arm64/signal/testcases/testcases.h index ad884c135314..49f1d5de7b5b 100644 --- a/tools/testing/selftests/arm64/signal/testcases/testcases.h +++ b/tools/testing/selftests/arm64/signal/testcases/testcases.h @@ -16,7 +16,8 @@ #define FPSIMD_CTX (1 << 0) #define SVE_CTX (1 << 1) -#define EXTRA_CTX (1 << 2) +#define ZA_CTX (1 << 2) +#define EXTRA_CTX (1 << 3) #define KSFT_BAD_MAGIC 0xdeadbeef