From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CBF2E18E0C for ; Wed, 14 Feb 2024 21:47:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707947251; cv=none; b=ncHeaUW+ScDHvykKkD40mvgv8rxx11LdGyeZxJ+s05Eg6wfd0F3jPUGoUGYBYFF93CYRHUfL/IyMnjHu/hmnOvkA8wEBBQYQboxVCmVm/MqMM3zdkMOgr1A1kzGlv3u9sMeSAVqiIgpOz4c+ESxTiRwfhXUJSxNoti5bNFqx1y8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707947251; c=relaxed/simple; bh=vFBM2F2A9I1qO4nMCigy3x7IwAGUGa7Swx0qaWY1OkE=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Tu/vttvyafHuQ4hbiv5n2lrLcGaHa8MYYbuWJa9v0+kntOfECSyM18JRcJLIpBlbpK4C6f0jzKj2Uyh7QBe8bCDh0JIYdq3Do8zK2W0UaSStK/xyquEWwx3RpyCuVlXiE7a2SzJlYc5FM+RZfhH0+dJ4jfXj3vGSIyRee10obOw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Ap5mWWwr; arc=none smtp.client-ip=192.198.163.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Ap5mWWwr" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1707947249; x=1739483249; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=vFBM2F2A9I1qO4nMCigy3x7IwAGUGa7Swx0qaWY1OkE=; b=Ap5mWWwrBAgztqYpKeVmTt0rmXGBnsyybvwf3LC2yyo1KZ746h7ueNJ+ zGArcz51b1c46BAiWmZbesqzTCb9Ny/+Cz33Da4mxjvrZWhSyx7OXHMeQ 5L58jW3Gx3senzq+8lLnGFJ0aJ1NL9puXVUM8w89zrKh0KTjV9IGbGXfo 5grgq7gC9hRpR1QduLnqC5EiJlaD91Eq/hZa0GHtYH9nncLyWnpAPrty8 bYfVaZy78QoQtj7thFML3eeDTzUjBZoC+fkm2qlGj7NNzYqXJgYzSmjmy KDKlg9kp9tG5RWRdvoM9Hg6JfH7cAPjp1aM5qSBeQLqa8Np5fGOyGy8Bw w==; X-IronPort-AV: E=McAfee;i="6600,9927,10984"; a="1895078" X-IronPort-AV: E=Sophos;i="6.06,160,1705392000"; d="scan'208";a="1895078" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa111.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Feb 2024 13:47:29 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,160,1705392000"; d="scan'208";a="7932105" Received: from mwajdecz-mobl.ger.corp.intel.com ([10.249.138.241]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Feb 2024 13:47:27 -0800 From: Michal Wajdeczko To: linux-kernel@vger.kernel.org Cc: Michal Wajdeczko , Kees Cook , Andy Shevchenko , Alexey Dobriyan , Jani Nikula Subject: [PATCH 1/2] wordpart.h: Helpers for making u16/u32/u64 values Date: Wed, 14 Feb 2024 22:46:53 +0100 Message-Id: <20240214214654.1700-1-michal.wajdeczko@intel.com> X-Mailer: git-send-email 2.21.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit It is quite common practice to make u16, u32 or u64 values from smaller words. Add simple helpers for that. Signed-off-by: Michal Wajdeczko --- v2: new macro names due to conflict with crypto/aria.h explicit cast and truncation everywhere (Alexey) moved to wordpart.h (Andy) --- Cc: Kees Cook Cc: Andy Shevchenko Cc: Alexey Dobriyan Cc: Jani Nikula --- include/linux/wordpart.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/include/linux/wordpart.h b/include/linux/wordpart.h index f6f8f83b15b0..8c75a5355112 100644 --- a/include/linux/wordpart.h +++ b/include/linux/wordpart.h @@ -31,6 +31,38 @@ */ #define lower_16_bits(n) ((u16)((n) & 0xffff)) +/** + * make_u16_from_u8 - make u16 value from two u8 values + * @hi: value representing upper 8 bits + * @lo: value representing lower 8 bits + */ +#define make_u16_from_u8(hi, lo) ((u16)((u16)(u8)(hi) << 8 | (u8)(lo))) + +/** + * make_u32_from_u16 - make u32 value from two u16 values + * @hi: value representing upper 16 bits + * @lo: value representing lower 16 bits + */ +#define make_u32_from_u16(hi, lo) ((u32)((u32)(u16)(hi) << 16 | (u16)(lo))) + +/** + * make_u32_from_u8 - make u32 value from u8 values + * @a: value representing bits 31-24 + * @b: value representing bits 23-16 + * @c: value representing bits 15-8 + * @d: value representing bits 7-0 + */ +#define make_u32_from_u8(a, b, c, d) \ + make_u32_from_u16(make_u16_from_u8((a), (b)), \ + make_u16_from_u8((c), (d))) + +/** + * make_u64_from_u32 - make u64 value from two u32 values + * @hi: value representing upper 32 bits + * @lo: value representing lower 32 bits + */ +#define make_u64_from_u32(hi, lo) ((u64)((u64)(u32)(hi) << 32 | (u32)(lo))) + /** * REPEAT_BYTE - repeat the value @x multiple times as an unsigned long value * @x: value to repeat -- 2.43.0