From patchwork Wed Jan 20 17:37:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Julien Thierry X-Patchwork-Id: 368205 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6CC87C433E0 for ; Wed, 20 Jan 2021 19:21:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3EFE923403 for ; Wed, 20 Jan 2021 19:21:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390691AbhATSqf (ORCPT ); Wed, 20 Jan 2021 13:46:35 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:22477 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733264AbhATRjh (ORCPT ); Wed, 20 Jan 2021 12:39:37 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611164288; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=veDG5mWnaW2Ixi8XXsaq9WVUVN6IJdn0R3qA8goBbxk=; b=B6555LsRqYWm5SinOKfSQlleULzeG6eSsesT8D2nze6+2fByiemUtK9mWKEmm125dHaxoJ x78ZbpZ8gTRHwWwPsKS+AXq9mLBghUnc9KYnvWMdSc7Mhy7e/TJjdncflGxhqoNMR+fMjp cU2v+9oS5UtKVrD539Y1F55jpSCOXBI= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-210-YudkiPCMOjmk3vUurLlSfg-1; Wed, 20 Jan 2021 12:38:06 -0500 X-MC-Unique: YudkiPCMOjmk3vUurLlSfg-1 Received: by mail-wr1-f71.google.com with SMTP id q18so11965932wrc.20 for ; Wed, 20 Jan 2021 09:38:06 -0800 (PST) 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=veDG5mWnaW2Ixi8XXsaq9WVUVN6IJdn0R3qA8goBbxk=; b=novqXbASCDH0uKo19eSwRoNIzWFpK8w6StylYdvWUz1i7cdlnw9MJ3svJ1GHelRbCN 1YiETlRnreCfK6RyTstvwPYBmyjPLq5kwqkL5MGc6PRt3IJ0duw8pLKK+iq51n0aB76E HBzUx+3QQMFbcOE5bI+aB8bEcDQ72xM3X6lBKBeTKjdi17N8IZCn21E92sQcD8vAojJX fEBnTTlnFjqhOoskwLiZD5H3IpHOwtNP1iG5WDfkI0FiZOw9KFIBo2xp9J0YgeA9Pw2k w9z8mjeRsn5p4xYwhre1k/iyCludRp+cpYH7UW9S2ZPmD5S6lPPndiNOZqvufDmUuOIX o2iQ== X-Gm-Message-State: AOAM530g54HeWTvqGA2uXiADq9KHe3QGwtZhikaOVJ4Urjpi6jbiYAuv WDojJRNUBA4d69Ph2MonpfihFnPbz1nFFfHyc5LvYzqI38jVvUR+fIIffuhtuSUpcusLk74D9kh 7CwwhPeHiN6z1bzUSMqQq X-Received: by 2002:adf:e8c5:: with SMTP id k5mr10771814wrn.242.1611164285589; Wed, 20 Jan 2021 09:38:05 -0800 (PST) X-Google-Smtp-Source: ABdhPJylft7yf7rgmFXUNRqNfNmGJKkqmx1XjdDH0fdpJqZZDyViFfZloLRO9kL6mc2iiU5PzrlGuw== X-Received: by 2002:adf:e8c5:: with SMTP id k5mr10771802wrn.242.1611164285463; Wed, 20 Jan 2021 09:38:05 -0800 (PST) Received: from redfedo.redhat.com ([2a01:cb14:499:3d00:cd47:f651:9d80:157a]) by smtp.gmail.com with ESMTPSA id x11sm4948325wmi.4.2021.01.20.09.38.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Jan 2021 09:38:05 -0800 (PST) From: Julien Thierry To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: catalin.marinas@arm.com, will@kernel.org, ardb@kernel.org, masahiroy@kernel.org, keescook@chromium.org, michal.lkml@markovi.net, jpoimboe@redhat.com, peterz@infradead.org, mark.rutland@arm.com, broonie@kernel.org, linux-efi@vger.kernel.org, linux-hardening@vger.kernel.org, Julien Thierry Subject: [RFC PATCH 01/17] tools: Add some generic functions and headers Date: Wed, 20 Jan 2021 18:37:44 +0100 Message-Id: <20210120173800.1660730-2-jthierry@redhat.com> X-Mailer: git-send-email 2.25.4 In-Reply-To: <20210120173800.1660730-1-jthierry@redhat.com> References: <20210120173800.1660730-1-jthierry@redhat.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-efi@vger.kernel.org These will be needed to be able to use arm64 instruction decoder in userland tools. Signed-off-by: Julien Thierry --- tools/include/asm-generic/bitops/__ffs.h | 11 +++++++ tools/include/linux/kernel.h | 21 +++++++++++++ tools/include/linux/printk.h | 40 ++++++++++++++++++++++++ 3 files changed, 72 insertions(+) create mode 100644 tools/include/linux/printk.h diff --git a/tools/include/asm-generic/bitops/__ffs.h b/tools/include/asm-generic/bitops/__ffs.h index 9d1310519497..963f8a22212f 100644 --- a/tools/include/asm-generic/bitops/__ffs.h +++ b/tools/include/asm-generic/bitops/__ffs.h @@ -42,4 +42,15 @@ static __always_inline unsigned long __ffs(unsigned long word) return num; } +static inline unsigned long __ffs64(u64 word) +{ +#if BITS_PER_LONG == 32 + if (((u32)word) == 0UL) + return __ffs((u32)(word >> 32)) + 32; +#elif BITS_PER_LONG != 64 +#error BITS_PER_LONG not 32 or 64 +#endif + return __ffs((unsigned long)word); +} + #endif /* _TOOLS_LINUX_ASM_GENERIC_BITOPS___FFS_H_ */ diff --git a/tools/include/linux/kernel.h b/tools/include/linux/kernel.h index a7e54a08fb54..e748982ed5c1 100644 --- a/tools/include/linux/kernel.h +++ b/tools/include/linux/kernel.h @@ -114,6 +114,27 @@ int scnprintf_pad(char * buf, size_t size, const char * fmt, ...); #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) #define round_down(x, y) ((x) & ~__round_mask(x, y)) +/** + * upper_32_bits - return bits 32-63 of a number + * @n: the number we're accessing + * + * A basic shift-right of a 64- or 32-bit quantity. Use this to suppress + * the "right shift count >= width of type" warning when that quantity is + * 32-bits. + */ +#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16)) + +/** + * lower_32_bits - return bits 0-31 of a number + * @n: the number we're accessing + */ +#define lower_32_bits(n) ((u32)(n)) + +/* Inspired from ALIGN_*_KERNEL */ +#define __ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask)) +#define __ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a) - 1) +#define ALIGN_DOWN(x, a) __ALIGN((x) - ((a) - 1), (a)) + #define current_gfp_context(k) 0 #define synchronize_rcu() diff --git a/tools/include/linux/printk.h b/tools/include/linux/printk.h new file mode 100644 index 000000000000..515ebdc47e6e --- /dev/null +++ b/tools/include/linux/printk.h @@ -0,0 +1,40 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _TOOLS_LINUX_KERNEL_PRINTK_H_ +#define _TOOLS_LINUX_KERNEL_PRINTK_H_ + +#include +#include +#include + +#define printk(fmt, ...) fprintf(stdout, fmt, ##__VA_ARGS__) +#define pr_info printk +#define pr_notice printk +#define pr_cont printk + +#define pr_warn(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__) +#define pr_err pr_warn +#define pr_alert pr_warn +#define pr_emerg pr_warn +#define pr_crit pr_warn + +/* + * Dummy printk for disabled debugging statements to use whilst maintaining + * gcc's format checking. + */ +#define no_printk(fmt, ...) \ +({ \ + if (0) \ + printk(fmt, ##__VA_ARGS__); \ + 0; \ +}) + +/* pr_devel() should produce zero code unless DEBUG is defined */ +#ifdef DEBUG +#define pr_devel(fmt, ...) printk +#else +#define pr_devel(fmt, ...) no_printk +#endif + +#define pr_debug pr_devel + +#endif /* _TOOLS_LINUX_KERNEL_PRINTK_H_ */