From nobody Tue Feb 10 05:45:42 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1627072545; cv=none; d=zohomail.com; s=zohoarc; b=EBXIEj6jNRCykAwoDXmfrCVcAFkbc6/MQ83JZQQQtO+xAZLOyYD91udbM0tBA0F/f17kGDPQFgOxQ1TnWfkWf9qB6Ic4HgRiQuF7IWxMpPMOZsGD0rrg0GRsfXyiMPlW+o4P0qxiZdyytInhqNanucFPYpg0jMJYnrYNup+S7p4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1627072545; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=GpJUCaic20diw7TGpsJ1YjJDDOjkpwMa5Bhf6kyWxKY=; b=KtVfVVdSVwjfzLTuLS5RVwJVrG/sZlstNhQwLVMK4HWuqNw5cn41xrbnrmSzgOv2Guc63qssYdyzxlQjlFAKQPCUKfUavEdCmLQJbns8nZwYOjtRjxsRl08uRY0Wo+BlE+oClmJCLvAAA1ZEednJ0HcwJBUDyDguMOqjoeHQQpo= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1627072545003522.6775199074057; Fri, 23 Jul 2021 13:35:45 -0700 (PDT) Received: from localhost ([::1]:53536 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m71tW-0002Iy-Vo for importer@patchew.org; Fri, 23 Jul 2021 16:35:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48620) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m71rj-00005L-W7 for qemu-devel@nongnu.org; Fri, 23 Jul 2021 16:33:52 -0400 Received: from mail-pj1-x1033.google.com ([2607:f8b0:4864:20::1033]:52047) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1m71rh-0008B7-RG for qemu-devel@nongnu.org; Fri, 23 Jul 2021 16:33:51 -0400 Received: by mail-pj1-x1033.google.com with SMTP id mt6so3902569pjb.1 for ; Fri, 23 Jul 2021 13:33:49 -0700 (PDT) Received: from localhost.localdomain (204-210-126-223.res.spectrum.com. [204.210.126.223]) by smtp.gmail.com with ESMTPSA id v23sm6904754pje.33.2021.07.23.13.33.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Jul 2021 13:33:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=GpJUCaic20diw7TGpsJ1YjJDDOjkpwMa5Bhf6kyWxKY=; b=oOqj8eRD1N3a8xjK7sYpF0jLDrg42jdWzZBxRXqh1OuGhIUn5ue3lvXmOpWmgp+KXQ yPpeSr+JcVR/11W+KZhv7u1o+p3MdPv5SCJdkFxPUdZM8hStVwwjlQuD2HyN8By7Ud/a E7fFImyi9Zg2hWTYCUOecTCNDdRa9kkOV7gIDkrgA8j5hPAEbRKWD/z/HUkNe+9ySU3V NpvvfW9gkZ8AcqriP+vTjjEcGpFsgoaOf2meP2reS8fq4ENaPfTH6UmZFLm8j7sgXkLV ustrzEHpZs+EtTA7C2g7rn6Y0MFRi+XFUhrzqlxAca20LmSdyaFF5XBivEwDNkKQInXv /pKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=GpJUCaic20diw7TGpsJ1YjJDDOjkpwMa5Bhf6kyWxKY=; b=taXiBGaL2CzHpjnbp9tuzV1W8q3b4xxjv3StIpp3Q5xX+aKEtH5jTbe2xdYZKZMX43 okK/gEHgv88ETKkaD5+T59sd8+tFuTeMnOPK2W4ShgZwYzj/eR9FA/APHfemmrZrEOhA 7b8S904LAP05/zgw4lJ06Cb/lJZvG1FuqK42ZsplZWJBzyNX3PuiaKkoUtOGY2soQhq4 c9gQp/P22HuYk36nMCapGI/bBfUjDToO0AQRvJRQ9c93PHCRzvx+OehGkPR/0PXS/v3e m20uaEc64jMCvL+jA+GvCRrw3eP+hhA/IqJFYbaLiearkMEGhUX5Mvs8HLwplL1ehD1s SQsQ== X-Gm-Message-State: AOAM530rCk7GeJTnjLvg3Z3kmB1j0wQFrPOxo3mVnHXNx3xOFbOUEaO9 m8kc86513CVo3GrnXOQooKHvBXfU6ZVqIA== X-Google-Smtp-Source: ABdhPJw7BKAm88jBsDRgiS8ruoMO5hkbinZEvNrIyZ1TGjiYILJlLMXmud5lyvViUTtrqe8EPKJV9A== X-Received: by 2002:a17:90a:f293:: with SMTP id fs19mr5483966pjb.212.1627072428681; Fri, 23 Jul 2021 13:33:48 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 1/3] target/arm: Correctly bound length in sve_zcr_get_valid_len Date: Fri, 23 Jul 2021 10:33:42 -1000 Message-Id: <20210723203344.968563-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210723203344.968563-1-richard.henderson@linaro.org> References: <20210723203344.968563-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1033; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1033.google.com X-Spam_score_int: -1 X-Spam_score: -0.2 X-Spam_bar: / X-Spam_report: (-0.2 / 5.0 requ) DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1627072545844100001 Content-Type: text/plain; charset="utf-8" Currently, our only caller is sve_zcr_len_for_el, which has already masked the length extracted from ZCR_ELx, so the masking done here is a nop. But we will shortly have uses from other locations, where the length will be unmasked. Saturate the length to ARM_MAX_VQ instead of truncating to the low 4 bits. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- target/arm/helper.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/target/arm/helper.c b/target/arm/helper.c index 0c07ca9837..8c1d8dbce3 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -6461,7 +6461,9 @@ static uint32_t sve_zcr_get_valid_len(ARMCPU *cpu, ui= nt32_t start_len) { uint32_t end_len; =20 - end_len =3D start_len &=3D 0xf; + start_len =3D MIN(start_len, ARM_MAX_VQ - 1); + end_len =3D start_len; + if (!test_bit(start_len, cpu->sve_vq_map)) { end_len =3D find_last_bit(cpu->sve_vq_map, start_len); assert(end_len < start_len); --=20 2.25.1