From patchwork Fri Jul 9 11:09:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yang Zhong X-Patchwork-Id: 1503038 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4GLrQY2B6Tz9sSs for ; Fri, 9 Jul 2021 21:24:05 +1000 (AEST) Received: from localhost ([::1]:54214 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m1obz-0003ZN-1x for incoming@patchwork.ozlabs.org; Fri, 09 Jul 2021 07:24:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38770) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m1oUR-0001ZQ-Fa for qemu-devel@nongnu.org; Fri, 09 Jul 2021 07:16:15 -0400 Received: from mga06.intel.com ([134.134.136.31]:37177) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m1oUO-0005B7-Dg for qemu-devel@nongnu.org; Fri, 09 Jul 2021 07:16:15 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10039"; a="270800871" X-IronPort-AV: E=Sophos;i="5.84,226,1620716400"; d="scan'208";a="270800871" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Jul 2021 04:15:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,226,1620716400"; d="scan'208";a="428730346" Received: from icx-2s.bj.intel.com ([10.240.192.119]) by orsmga002.jf.intel.com with ESMTP; 09 Jul 2021 04:15:10 -0700 From: Yang Zhong To: qemu-devel@nongnu.org Subject: [PATCH v3 29/33] bitops: Support 32 and 64 bit mask macro Date: Fri, 9 Jul 2021 19:09:51 +0800 Message-Id: <20210709110955.73256-30-yang.zhong@intel.com> X-Mailer: git-send-email 2.29.2.334.gfaefdd61ec In-Reply-To: <20210709110955.73256-1-yang.zhong@intel.com> References: <20210709110955.73256-1-yang.zhong@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=134.134.136.31; envelope-from=yang.zhong@intel.com; helo=mga06.intel.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, 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: yang.zhong@intel.com, seanjc@google.com, kai.huang@intel.com, jarkko@kernel.org, pbonzini@redhat.com, eblake@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The Qemu should enable bit mask macro like Linux did in the kernel, the GENMASK(h, l) and GENMASK_ULL(h, l) will set the bit to 1 from l to h bit in the 32 bit or 64 bit long type. Signed-off-by: Yang Zhong --- include/qemu/bitops.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h index 110c56e099..130d746ba3 100644 --- a/include/qemu/bitops.h +++ b/include/qemu/bitops.h @@ -18,6 +18,7 @@ #define BITS_PER_BYTE CHAR_BIT #define BITS_PER_LONG (sizeof (unsigned long) * BITS_PER_BYTE) +#define BITS_PER_LONG_LONG 64 #define BIT(nr) (1UL << (nr)) #define BIT_ULL(nr) (1ULL << (nr)) @@ -28,6 +29,12 @@ #define MAKE_64BIT_MASK(shift, length) \ (((~0ULL) >> (64 - (length))) << (shift)) +#define GENMASK(h, l) \ + (((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h)))) + +#define GENMASK_ULL(h, l) \ + (((~0ULL) << (l)) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h)))) + /** * set_bit - Set a bit in memory * @nr: the bit to set