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 2CF52C43334 for ; Thu, 7 Jul 2022 10:38:43 +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:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=i+R2aath+Bm2t36wNTd2q+pda1a5S13DH4XwwzG/voM=; b=siZXSda7XBgA99 g+uwv5YxFlenuU2xR1mQgq8z0G/aYv4/yDhwHTP3obvN1Ml9ER8zx6w8ptjdNlAF/+O/BhBBDK0qx Hy1oYNdqa7XKtm6mYCMVE9UkM9sRiuMd3vptH8YpCDl0O0IuOkPee4/dApv872VfsUgJXqSwzx0ur o3Fik633Cdrk6ueMNkcit56hLqp4Fw4JZOe/AWOR9CD2wcYAYcNckCtxajt6WS2VX81L816vTtFew 9/ke9DjH4MXkycCHTkiI/ipSb6OpLG9ZUNwEZS4jIQi5Mgc7fd/g9+aBld/iiq0t0+ArlXA+ac7lS dHqsmEBEbsOQXo0KJKGg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o9OtI-00FbLf-4L; Thu, 07 Jul 2022 10:37:48 +0000 Received: from ams.source.kernel.org ([2604:1380:4601:e00::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o9Ot7-00FbI1-Hv for linux-arm-kernel@lists.infradead.org; Thu, 07 Jul 2022 10:37:38 +0000 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 3C674B82104; Thu, 7 Jul 2022 10:37:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 93A5DC341C6; Thu, 7 Jul 2022 10:37:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1657190255; bh=Dup2zd+7F9qyzJprPEoD6DhCHE2Fp1DZCa06Zet3eQs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=O73L2A1n/NgQKISSz5lPEF7Lw/SD7T/W/rCtTGl9JnYd8xnH5ehHwN03IZ8UQ+Nm6 jq4an+6MZtaxxjICbM61la8njaagtySHoO372QqDR8WdSzOZhwVBgrM03fcH6B+wwp kFBH3HXOJUjHFE7PI2BtNUsH7h/VfKWQLgUVGT54vgofpz5S7ZcQ7rYhaEUQ7z0l/h 4z7Z1Jd0PLY11sakzzo4VTzLPewweRC5xbd5ziZoWdNKBXwAQ+pZlrm686/QAkANsj OLRMkm3APRrMsG27UOscIjsVxSzYgcUvR9dJJQjZX2+i5TUs4cviP7VksMHiVdqjym NJdznA6X+RVdg== From: Mark Brown To: Catalin Marinas , Will Deacon Cc: Suzuki K Poulose , Szabolcs Nagy , linux-arm-kernel@lists.infradead.org, Mark Brown Subject: [PATCH v5 1/3] arm64/hwcap: Document allocation of upper bits of AT_HWCAP Date: Thu, 7 Jul 2022 11:36:30 +0100 Message-Id: <20220707103632.12745-2-broonie@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220707103632.12745-1-broonie@kernel.org> References: <20220707103632.12745-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=783; h=from:subject; bh=Dup2zd+7F9qyzJprPEoD6DhCHE2Fp1DZCa06Zet3eQs=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBixrcsUZEqf+xFxr5rtXZlPiCIbhm3aeGfI8EteV77 VC76pjGJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYsa3LAAKCRAk1otyXVSH0HDBB/ 40uH9OQ2gLf8TgzxAMCarmCrAR+CSLxbY8rUvBXeWz+ap4dukbfPjEHzyYveCN76oLjYbqAKqor03a F0n76TyoeGiPiKGYk2L5zhPirzzKITUyh7MgTYgapujTdYq5sD/88VwKOmwihtZeCgh77nP/qJ/hfO 09CEjFB6WfDPgByzQhAnSkoRUCYp1tA4Q8tEsXTeyUcG+8SNd2UWY11stwGuJcxgMG4LVrXLarDFZT NAQ14Yf+npkYLA69/7Zp53HYYFh5fWeCP9vV5Ywbz93Qj6mmOtIRqBj4HmYfI+3tWTUb3h1qM2sxeM G/+Kgfg6bciWXrDYgivoH7TqYQiAgi 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-20220707_033737_794916_DEBB3288 X-CRM114-Status: GOOD ( 11.01 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The top two bits of AT_HWCAP are reserved for use by glibc and the rest of the top 32 bits are being kept unallocated for potential use by glibc. Document this in the header. Signed-off-by: Mark Brown --- arch/arm64/include/uapi/asm/hwcap.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h index 4bb2cc8ac446..fd7577cf8e77 100644 --- a/arch/arm64/include/uapi/asm/hwcap.h +++ b/arch/arm64/include/uapi/asm/hwcap.h @@ -19,6 +19,9 @@ /* * HWCAP flags - for AT_HWCAP + * + * Bits 62 and 63 are reserved for use by libc. + * Bits 32-61 are unallocated for potential use by libc. */ #define HWCAP_FP (1 << 0) #define HWCAP_ASIMD (1 << 1) -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel