From patchwork Thu Jul 20 18:39:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13320991 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 41B62EB64DD for ; Thu, 20 Jul 2023 18:39:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=kAY2qWsfnlDQd6cE9MhELMs5KJ1+D5zqiWPlmEARL3M=; b=jvHBUs0N0RUFii cqkNv8wDVenmxbm6xrpX5Y9qJchURZFCfDF9FskaAcW4BpdCgSj00BOxwdNyDjZVQn2PGm1dPbO49 1Qe1enrP4Ff9Ir5+bkbiTyX5gF+VZKCJJ/ewrwTiNrQ9rHQ4TkJClSl1L+s3a7dswM9Ga7xDALxXc kSFMsE4dFWEzgbNEV0intzliUDtCqjzR132iobsGLCVDtl2Fjafh4WoRz2E9hyVHv315NkdJFxi+y d0bkS4Sk8S1iAF4R3XfPQf7iBZeQjGByML+SMXvQJy3/ZUn/3k0q905JAV/88MLm22moH7OtH/BL/ 9EEB+rFJT46Dxh1Kallg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qMYYm-00Bv1S-1q; Thu, 20 Jul 2023 18:39:32 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qMYYY-00BuvN-0d for linux-arm-kernel@lists.infradead.org; Thu, 20 Jul 2023 18:39:19 +0000 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 B42ED61BFA; Thu, 20 Jul 2023 18:39:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D507EC433C7; Thu, 20 Jul 2023 18:39:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1689878357; bh=rXmOaMmqlk7QrELiC/kSDYYNiucDsBT8D5q7ohFdQ7s=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=mtgFWNoVWqppKfmmwXxHY8o8mfruxBcpLKPaSxviOeFSB2G6+jMlgOJ78/GJK3zyM YQivuehx4s4SjWWsN4xM6sAZEmyXkgNLlOCVKMv5/xVfMtIakGE6/QZZ2mrU4UynjF tKKo//JJKRRtRb7kfd4cL551+M2efF1R39kVXMKFbpLfzwSMUw/OP4XcFSU9W8/nNo vAOm8V2nd41dZcex48k+lsUx8u9tcNB+lr5v0KU8du4AY9lF1lJ4lK+1YMQIian7P4 6MW26EsuCRI0e8fp0Wt5lWv/DJp16stqfeaB6fGqRnqZHFrOpparJUO+S4O++RMeRR mQmFpyuK9SXcQ== From: Mark Brown Date: Thu, 20 Jul 2023 19:39:00 +0100 Subject: [PATCH v2 3/3] kselftest/arm64: Validate that changing one VL type does not affect another MIME-Version: 1.0 Message-Id: <20230720-arm64-fix-sve-sme-vl-change-v2-3-8eea06b82d57@kernel.org> References: <20230720-arm64-fix-sve-sme-vl-change-v2-0-8eea06b82d57@kernel.org> In-Reply-To: <20230720-arm64-fix-sve-sme-vl-change-v2-0-8eea06b82d57@kernel.org> To: Catalin Marinas , Will Deacon , Shuah Khan Cc: David Spickett , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Mark Brown X-Mailer: b4 0.13-dev-099c9 X-Developer-Signature: v=1; a=openpgp-sha256; l=1868; i=broonie@kernel.org; h=from:subject:message-id; bh=rXmOaMmqlk7QrELiC/kSDYYNiucDsBT8D5q7ohFdQ7s=; b=owGbwMvMwMWocq27KDak/QLjabUkhpSd9R4iIrrWIkXKwQIKwffTPk6wM8nqKk9d36291sEiQZGh RbuT0ZiFgZGLQVZMkWXts4xV6eESW+c/mv8KZhArE8gUBi5OAZjItzvs/wu9qy0kFdUf+G5IsXo2/7 hA/Zn8hGUznl1ZPTH9wTmOLVdtiw/kbM9N97+d5+DiXm8a6/TobS7388Be7ldpHnN0dyVNim351vDA WqKm+F/G2X3MsWyJxz9HX5zkW7pn0i03lxcy880MNniqfGGxDs7qibDhvLnvuv5tJVnG6sSsN05Tvq fJcabuT4uY0G9hfKT9xgSn74s2X/tdqdapw/J7eYjvi3vGwuY62bc1ZQVvepYWpLX32+zYvbr9KacP u8gNfevc8sqUee8MqoKOGG6Yaxr3xlZnayjTMyMdnqYVRdZH+jQbNXtN+BS4xPXm75nPVmG++OfPu4 KnZWZU9m3ZG8tzRNjlQ8wdDi4A X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230720_113918_320004_74C62A8B X-CRM114-Status: GOOD ( 16.51 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On a system with both SVE and SME when we change one of the VLs this should not result in a change in the other VL. Add a check that this is in fact the case to vec-syscfg. Signed-off-by: Mark Brown --- tools/testing/selftests/arm64/fp/vec-syscfg.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/arm64/fp/vec-syscfg.c b/tools/testing/selftests/arm64/fp/vec-syscfg.c index 58ea4bde5be7..5f648b97a06f 100644 --- a/tools/testing/selftests/arm64/fp/vec-syscfg.c +++ b/tools/testing/selftests/arm64/fp/vec-syscfg.c @@ -554,7 +554,8 @@ static void prctl_set_onexec(struct vec_data *data) /* For each VQ verify that setting via prctl() does the right thing */ static void prctl_set_all_vqs(struct vec_data *data) { - int ret, vq, vl, new_vl; + int ret, vq, vl, new_vl, i; + int orig_vls[ARRAY_SIZE(vec_data)]; int errors = 0; if (!data->min_vl || !data->max_vl) { @@ -563,6 +564,9 @@ static void prctl_set_all_vqs(struct vec_data *data) return; } + for (i = 0; i < ARRAY_SIZE(vec_data); i++) + orig_vls[i] = vec_data[i].rdvl(); + for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; vq++) { vl = sve_vl_from_vq(vq); @@ -585,6 +589,22 @@ static void prctl_set_all_vqs(struct vec_data *data) errors++; } + /* Did any other VLs change? */ + for (i = 0; i < ARRAY_SIZE(vec_data); i++) { + if (&vec_data[i] == data) + continue; + + if (!(getauxval(vec_data[i].hwcap_type) & vec_data[i].hwcap)) + continue; + + if (vec_data[i].rdvl() != orig_vls[i]) { + ksft_print_msg("%s VL changed from %d to %d\n", + vec_data[i].name, orig_vls[i], + vec_data[i].rdvl()); + errors++; + } + } + /* Was that the VL we asked for? */ if (new_vl == vl) continue;