From nobody Fri Dec 19 22:03:25 2025 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 B8903C04E69 for ; Thu, 3 Aug 2023 18:44:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233941AbjHCSoc (ORCPT ); Thu, 3 Aug 2023 14:44:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59776 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232525AbjHCSnu (ORCPT ); Thu, 3 Aug 2023 14:43:50 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 557DF3581; Thu, 3 Aug 2023 11:43:20 -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 6F67861E97; Thu, 3 Aug 2023 18:42:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2D58CC433CB; Thu, 3 Aug 2023 18:42:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1691088141; bh=VyfjNO5h5r77yO4Y1JW8iCxzkIDFIM1fWR/4Pr5RYRg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=PLCPxIk+rX4tVb1dQWIa7fuSns+Q05eQxvWW1pX9z4siJovRzdIkePyyZFfLatKwg OKjhAo4UeTFFBQl8ZqVXb+hivg4QBExi/Q1qkURhjOL8a9ElJiC1ouwgShjA1i2Fxf jmf/cvlP09V+cY6Jg0DdTJNPRW4GzRP7HwTgv5Cu8KKgRSDsPyEXnDRBwG5z86vwIs bg/NJCZ3hLg4KHoHshygIiVaCbkv2V2pkUBoTSkhzQ9rB+tTywray8lkcpbD2DaiEe X/LApfLG0zs7LmR2cjVTaQ6eu4oo0mRRWWLy/GIL2U1HZ/dTfw9FvKZq9OCLa7kONq aJmqThvOXaYcg== From: Mark Brown Date: Thu, 03 Aug 2023 19:33:22 +0100 Subject: [PATCH 2/3] arm64/fpsimd: Sync FPSIMD state with SVE for SME only systems MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20230803-arm64-fix-ptrace-ssve-no-sve-v1-2-49df214bfb3e@kernel.org> References: <20230803-arm64-fix-ptrace-ssve-no-sve-v1-0-49df214bfb3e@kernel.org> In-Reply-To: <20230803-arm64-fix-ptrace-ssve-no-sve-v1-0-49df214bfb3e@kernel.org> To: Oleg Nesterov , Catalin Marinas , Will Deacon Cc: David Spickett , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Mark Brown , stable@vger.kernel.org X-Mailer: b4 0.13-dev-034f2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1318; i=broonie@kernel.org; h=from:subject:message-id; bh=VyfjNO5h5r77yO4Y1JW8iCxzkIDFIM1fWR/4Pr5RYRg=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBky/UFuHsJ06H3Tw69T76dXRohdyF0xpCyyRI8oCC/ d5fJ7SeJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZMv1BQAKCRAk1otyXVSH0DwkB/ wLdg/UyqGcamMN1NStA3gnuq4KUFkBMnOgGe0MR/DTXqKb4z5c4AXSdU+WQZ8iFVP1nNFtpPERUinw 4ePvcXEwRCtiLVET0UOMyq8C06RslgakCPJJ6OgSXVXA18uKXsNjZVnLorkwhvNay5Xwxi39v1OX/k RhczmRj2zdB9EACANJtldzSkwNjt82ambXoCiQKkUKIXl/AHUOnlNc47v95rO5+Orn+spJUQW6adk9 SjKPRalND+QtLZvjmssYZWZZ95FxdBoVPz1iIosAzsfSRp63NMTXCypaergImIVq+q/079uw4cWLC+ d5oJfnBr7baCUCEDWA7aOHdSUOJrIK X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently we guard FPSIMD/SVE state conversions with a check for the system supporting SVE but SME only systems may need to sync streaming mode SVE state so add a check for SME support too. These functions are only used by the ptrace code. Fixes: e12310a0d30 ("arm64/sme: Implement ptrace support for streaming mode= SVE registers") Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- arch/arm64/kernel/fpsimd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index 520b681a07bb..b4afa0d147cc 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -679,7 +679,7 @@ static void fpsimd_to_sve(struct task_struct *task) void *sst =3D task->thread.sve_state; struct user_fpsimd_state const *fst =3D &task->thread.uw.fpsimd_state; =20 - if (!system_supports_sve()) + if (!system_supports_sve() && !system_supports_sme()) return; =20 vq =3D sve_vq_from_vl(thread_get_cur_vl(&task->thread)); @@ -705,7 +705,7 @@ static void sve_to_fpsimd(struct task_struct *task) unsigned int i; __uint128_t const *p; =20 - if (!system_supports_sve()) + if (!system_supports_sve() && !system_supports_sme()) return; =20 vl =3D thread_get_cur_vl(&task->thread); --=20 2.30.2