From patchwork Sat Jan 23 08:00:13 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shannon Zhao X-Patchwork-Id: 60235 Delivered-To: patch@linaro.org Received: by 10.112.130.2 with SMTP id oa2csp326413lbb; Sat, 23 Jan 2016 00:03:09 -0800 (PST) X-Received: by 10.194.113.165 with SMTP id iz5mr7123038wjb.4.1453536185625; Sat, 23 Jan 2016 00:03:05 -0800 (PST) Return-Path: Received: from lists.xen.org (lists.xenproject.org. [50.57.142.19]) by mx.google.com with ESMTPS id yt7si543156wjc.245.2016.01.23.00.03.05 (version=TLS1 cipher=AES128-SHA bits=128/128); Sat, 23 Jan 2016 00:03:05 -0800 (PST) Received-SPF: neutral (google.com: 50.57.142.19 is neither permitted nor denied by best guess record for domain of xen-devel-bounces@lists.xen.org) client-ip=50.57.142.19; Authentication-Results: mx.google.com; spf=neutral (google.com: 50.57.142.19 is neither permitted nor denied by best guess record for domain of xen-devel-bounces@lists.xen.org) smtp.mailfrom=xen-devel-bounces@lists.xen.org Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aMt8a-00025I-88; Sat, 23 Jan 2016 08:01:36 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aMt8Y-00024M-Eh for xen-devel@lists.xen.org; Sat, 23 Jan 2016 08:01:34 +0000 Received: from [85.158.139.211] by server-12.bemta-5.messagelabs.com id 90/AA-17089-D5333A65; Sat, 23 Jan 2016 08:01:33 +0000 X-Env-Sender: zhaoshenglong@huawei.com X-Msg-Ref: server-7.tower-206.messagelabs.com!1453536086!17424448!1 X-Originating-IP: [58.251.152.64] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 32729 invoked from network); 23 Jan 2016 08:01:32 -0000 Received: from szxga01-in.huawei.com (HELO szxga01-in.huawei.com) (58.251.152.64) by server-7.tower-206.messagelabs.com with RC4-SHA encrypted SMTP; 23 Jan 2016 08:01:32 -0000 Received: from 172.24.1.49 (EHLO szxeml433-hub.china.huawei.com) ([172.24.1.49]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DDP78219; Sat, 23 Jan 2016 16:00:49 +0800 (CST) Received: from HGHY1Z002260041.china.huawei.com (10.177.16.142) by szxeml433-hub.china.huawei.com (10.82.67.210) with Microsoft SMTP Server id 14.3.235.1; Sat, 23 Jan 2016 16:00:37 +0800 From: Shannon Zhao To: Date: Sat, 23 Jan 2016 16:00:13 +0800 Message-ID: <1453536020-16196-2-git-send-email-zhaoshenglong@huawei.com> X-Mailer: git-send-email 1.9.0.msysgit.0 In-Reply-To: <1453536020-16196-1-git-send-email-zhaoshenglong@huawei.com> References: <1453536020-16196-1-git-send-email-zhaoshenglong@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.177.16.142] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090203.56A33332.000B, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 66e690d026f12119a18e89adb68a4242 Cc: ian.campbell@citrix.com, Doug Goldstein , peter.huangpeng@huawei.com, julien.grall@citrix.com, stefano.stabellini@citrix.com, shannon.zhao@linaro.org Subject: [Xen-devel] [PATCH v5 1/8] Kconfig: import kconfig.h from Linux 4.3 X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org From: Shannon Zhao To support using CONFIG_ options in C/CPP expressions, import kconfig.h from the Linux v4.3 tag (commit id 6a13feb9c82803e2b815eca72fa7a9f5561d7861). CC: Doug Goldstein Signed-off-by: Shannon Zhao --- xen/include/xen/config.h | 2 +- xen/include/xen/kconfig.h | 54 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 55 insertions(+), 1 deletion(-) create mode 100644 xen/include/xen/kconfig.h -- 2.0.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel diff --git a/xen/include/xen/config.h b/xen/include/xen/config.h index 7595599..eeb49db 100644 --- a/xen/include/xen/config.h +++ b/xen/include/xen/config.h @@ -7,7 +7,7 @@ #ifndef __XEN_CONFIG_H__ #define __XEN_CONFIG_H__ -#include +#include #ifndef __ASSEMBLY__ #include diff --git a/xen/include/xen/kconfig.h b/xen/include/xen/kconfig.h new file mode 100644 index 0000000..d68a7ed --- /dev/null +++ b/xen/include/xen/kconfig.h @@ -0,0 +1,54 @@ +#ifndef __XEN_KCONFIG_H +#define __XEN_KCONFIG_H + +#include + +/* + * Helper macros to use CONFIG_ options in C/CPP expressions. Note that + * these only work with boolean and tristate options. + */ + +/* + * Getting something that works in C and CPP for an arg that may or may + * not be defined is tricky. Here, if we have "#define CONFIG_BOOGER 1" + * we match on the placeholder define, insert the "0," for arg1 and generate + * the triplet (0, 1, 0). Then the last step cherry picks the 2nd arg (a one). + * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when + * the last step cherry picks the 2nd arg, we get a zero. + */ +#define __ARG_PLACEHOLDER_1 0, +#define config_enabled(cfg) _config_enabled(cfg) +#define _config_enabled(value) __config_enabled(__ARG_PLACEHOLDER_##value) +#define __config_enabled(arg1_or_junk) ___config_enabled(arg1_or_junk 1, 0) +#define ___config_enabled(__ignored, val, ...) val + +/* + * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0 + * otherwise. For boolean options, this is equivalent to + * IS_ENABLED(CONFIG_FOO). + */ +#define IS_BUILTIN(option) config_enabled(option) + +/* + * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0 + * otherwise. + */ +#define IS_MODULE(option) config_enabled(option##_MODULE) + +/* + * IS_REACHABLE(CONFIG_FOO) evaluates to 1 if the currently compiled + * code can call a function defined in code compiled based on CONFIG_FOO. + * This is similar to IS_ENABLED(), but returns false when invoked from + * built-in code when CONFIG_FOO is set to 'm'. + */ +#define IS_REACHABLE(option) (config_enabled(option) || \ + (config_enabled(option##_MODULE) && config_enabled(MODULE))) + +/* + * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm', + * 0 otherwise. + */ +#define IS_ENABLED(option) \ + (IS_BUILTIN(option) || IS_MODULE(option)) + +#endif /* __XEN_KCONFIG_H */