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 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 57818C3ABC0 for ; Thu, 8 May 2025 14:17:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=BobD5BhKMIqHX7UdhpnmPHxBN7MIZLYeqhA/PchGjkM=; b=mIqNNcGXQFAXw5d7HKNjNIQsay IdJdI0BlHb83E32FmB3CNZ/645+5TQph9IykhcAcwhIMvUq3XIp0geqsiU0+dL2cm4Jijl73LKLSj ekQPpCJSKMn0y76LEIL9peO0CCFtvKeDMRtkwWfNdLnZVmUSUdoKZBBTrw7KsMQ+RAh1Ytml0+tr/ Cqby+T/kfVlPj2Iv78Ds/oEYrd6dvyAinvtbc8lqUCCqnama3+3pnJKSv8tLM5D0jvWOLojE9GCor xo13cpt8AH3juKKDASIRgtNxyHvHur/t8ePBn/2J4DW7LNcK9tlNujQk34DypB1T7/53xLD031xcc /nHBPumw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uD23p-00000000t1N-3k4v; Thu, 08 May 2025 14:17:17 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uD1IU-00000000kaw-2Tal for linux-arm-kernel@bombadil.infradead.org; Thu, 08 May 2025 13:28:22 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=BobD5BhKMIqHX7UdhpnmPHxBN7MIZLYeqhA/PchGjkM=; b=ioHqT0Xd5E/IYwGtG+nt65fmJH FyBAYHs9i8Ob/aaHY7mR1NJeHs4S8re73Ec4P4P5aX9K/gkGqPzTox0HLt2YKGP65mlgQkCI3ipdv fOHKFBUuW8ujsRhHvPzzGRk6Y+Y9nnlD0hexrZvLfiJw52VgUEa3LivLtuYpcWMGbu5363DoLnNcT 7uWlHhIe5qfjse3HDme+oMAb+5fIxNPB6t6OU92vu2zpXplUsXUw7MGRjAmeiGbUV16nqDJv4eXb8 n2pe3DCWb9QDZdzsnfpqz29SQo0MUm4QO1BM8ZKUfp0CSf0t+vFG8+vW7+IvLgbBgiRS2fOtVPnTl uUljCS/g==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.98.1 #2 (Red Hat Linux)) id 1uD1IR-0000000G3vj-2tAh for linux-arm-kernel@lists.infradead.org; Thu, 08 May 2025 13:28:21 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 94EA6106F; Thu, 8 May 2025 06:28:08 -0700 (PDT) Received: from lakrids.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 942733F58B; Thu, 8 May 2025 06:28:16 -0700 (PDT) From: Mark Rutland To: linux-arm-kernel@lists.infradead.org Cc: broonie@kernel.org, catalin.marinas@arm.com, daniel.kiss@arm.com, david.spickett@arm.com, luis.machado@arm.com, mark.rutland@arm.com, maz@kernel.org, richard.sandiford@arm.com, sander.desmalen@arm.com, tabba@google.com, tamas.petz@arm.com, tkjos@google.com, will@kernel.org, yury.khrustalev@arm.com Subject: [PATCH v2 23/24] kselftest/arm64: fp-ptrace: Adjust to new VL change behaviour Date: Thu, 8 May 2025 14:26:43 +0100 Message-Id: <20250508132644.1395904-24-mark.rutland@arm.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20250508132644.1395904-1-mark.rutland@arm.com> References: <20250508132644.1395904-1-mark.rutland@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250508_142819_982541_5B836D40 X-CRM114-Status: GOOD ( 10.96 ) 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 In order to fix an ABI problem, we recently changed the way that changing the SVE/SME vector length affects PSTATE.SM. Historically, changing the SME vector length would clear PSTATE.SM. Now, changing the SME vector length preserves PSTATE.SM. Update the fp-ptrace test for the new behaviour. Signed-off-by: Mark Rutland Cc: Catalin Marinas Cc: David Spickett Cc: Luis Machado Cc: Marc Zyngier Cc: Mark Brown Cc: Will Deacon --- tools/testing/selftests/arm64/fp/fp-ptrace.c | 18 +++--------------- 1 file changed, 3 insertions(+), 15 deletions(-) diff --git a/tools/testing/selftests/arm64/fp/fp-ptrace.c b/tools/testing/selftests/arm64/fp/fp-ptrace.c index 762048eb354ff..c2882a5a5cc0a 100644 --- a/tools/testing/selftests/arm64/fp/fp-ptrace.c +++ b/tools/testing/selftests/arm64/fp/fp-ptrace.c @@ -1183,18 +1183,8 @@ static void sve_write(pid_t child, struct test_config *config) static bool za_write_supported(struct test_config *config) { - if (config->sme_vl_in != config->sme_vl_expected) { - /* Changing the SME VL exits streaming mode. */ - if (config->svcr_expected & SVCR_SM) { - return false; - } - } else { - /* Otherwise we can't change streaming mode */ - if ((config->svcr_in & SVCR_SM) != - (config->svcr_expected & SVCR_SM)) { - return false; - } - } + if ((config->svcr_in & SVCR_SM) != (config->svcr_expected & SVCR_SM)) + return false; return true; } @@ -1212,10 +1202,8 @@ static void za_write_expected(struct test_config *config) memset(zt_expected, 0, sizeof(zt_expected)); } - /* Changing the SME VL flushes ZT, SVE state and exits SM */ + /* Changing the SME VL flushes ZT, SVE state */ if (config->sme_vl_in != config->sme_vl_expected) { - svcr_expected &= ~SVCR_SM; - sve_vq = __sve_vq_from_vl(vl_expected(config)); memset(z_expected, 0, __SVE_ZREGS_SIZE(sve_vq)); memset(p_expected, 0, __SVE_PREGS_SIZE(sve_vq)); -- 2.30.2