From mboxrd@z Thu Jan 1 00:00:00 1970 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 40035C6FD1F for ; Tue, 7 Mar 2023 17:22:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231433AbjCGRWt (ORCPT ); Tue, 7 Mar 2023 12:22:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41832 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231272AbjCGRWZ (ORCPT ); Tue, 7 Mar 2023 12:22:25 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C3017286 for ; Tue, 7 Mar 2023 09:17:55 -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 ams.source.kernel.org (Postfix) with ESMTPS id 443E3B81987 for ; Tue, 7 Mar 2023 17:17:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8BA29C433A1; Tue, 7 Mar 2023 17:17:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678209473; bh=rI6vaB/t77bBlrJKEngq0yjTSkcBHkpEMeeLk6ovIa4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TxsnZR5xieTYUbDkgEW7E65T4FwyYzGvzNx0tIbBSzPPab63rOVp9iKhirVWOWteQ ltoMU46g0O0Nutx//fVSA7fXvcdGZTgowqw/qLP8wyr7DQ7s21I+ec0MtKKq7kLakb UXW3kwIujv8xtKTdu/Q3qrYgdy+e1q7vpU6i0WcA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mark Brown , Catalin Marinas , Sasha Levin Subject: [PATCH 6.2 0231/1001] kselftest/arm64: Fix enumeration of systems without 128 bit SME Date: Tue, 7 Mar 2023 17:50:03 +0100 Message-Id: <20230307170031.884558972@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307170022.094103862@linuxfoundation.org> References: <20230307170022.094103862@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Mark Brown [ Upstream commit 5f389238534ac8ca4ee3ab12eeb89d3984d303a1 ] The current signal handling tests for SME do not account for the fact that unlike SVE all SME vector lengths are optional so we can't guarantee that we will encounter the minimum possible VL, they will hang enumerating VLs on such systems. Abort enumeration when we find the lowest VL. Fixes: 4963aeb35a9e ("kselftest/arm64: signal: Add SME signal handling tests") Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20230131-arm64-kselftest-sig-sme-no-128-v1-1-d47c13dc8e1e@kernel.org Signed-off-by: Catalin Marinas Signed-off-by: Sasha Levin --- tools/testing/selftests/arm64/signal/testcases/ssve_regs.c | 4 ++++ tools/testing/selftests/arm64/signal/testcases/za_regs.c | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c b/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c index d0a178945b1a8..c6b17c47cac4c 100644 --- a/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c @@ -34,6 +34,10 @@ static bool sme_get_vls(struct tdescr *td) vl &= PR_SME_VL_LEN_MASK; + /* Did we find the lowest supported VL? */ + if (vq < sve_vq_from_vl(vl)) + break; + /* Skip missing VLs */ vq = sve_vq_from_vl(vl); diff --git a/tools/testing/selftests/arm64/signal/testcases/za_regs.c b/tools/testing/selftests/arm64/signal/testcases/za_regs.c index ea45acb115d5b..174ad66566964 100644 --- a/tools/testing/selftests/arm64/signal/testcases/za_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/za_regs.c @@ -34,6 +34,10 @@ static bool sme_get_vls(struct tdescr *td) vl &= PR_SME_VL_LEN_MASK; + /* Did we find the lowest supported VL? */ + if (vq < sve_vq_from_vl(vl)) + break; + /* Skip missing VLs */ vq = sve_vq_from_vl(vl); -- 2.39.2