From patchwork Fri Sep 27 09:00:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juergen Gross X-Patchwork-Id: 11164103 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D0B3114DB for ; Fri, 27 Sep 2019 09:02:41 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B633A2146E for ; Fri, 27 Sep 2019 09:02:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B633A2146E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1iDm7d-0005UJ-Op; Fri, 27 Sep 2019 09:01:05 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1iDm7b-0005SW-Vv for xen-devel@lists.xenproject.org; Fri, 27 Sep 2019 09:01:04 +0000 X-Inumbo-ID: 4ec16aa4-e105-11e9-9671-12813bfff9fa Received: from mx1.suse.de (unknown [195.135.220.15]) by localhost (Halon) with ESMTPS id 4ec16aa4-e105-11e9-9671-12813bfff9fa; Fri, 27 Sep 2019 09:00:52 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id D716CAFE8; Fri, 27 Sep 2019 09:00:51 +0000 (UTC) From: Juergen Gross To: xen-devel@lists.xenproject.org Date: Fri, 27 Sep 2019 11:00:47 +0200 Message-Id: <20190927090048.28872-6-jgross@suse.com> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190927090048.28872-1-jgross@suse.com> References: <20190927090048.28872-1-jgross@suse.com> Subject: [Xen-devel] [PATCH v1 5/6] xen: add /buildinfo/config entry to hypervisor filesystem X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Juergen Gross , Stefano Stabellini , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , Tim Deegan , Julien Grall , Jan Beulich MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Add the /buildinfo/config entry to the hypervisor filesystem. This entry contains the .config file used to build the hypervisor. Signed-off-by: Juergen Gross --- .gitignore | 2 ++ docs/misc/hypfs-paths.pandoc | 9 +++++++++ xen/common/Makefile | 9 +++++++++ xen/common/hypfs.c | 17 +++++++++++++++++ xen/include/xen/kernel.h | 2 ++ xen/tools/Makefile | 9 +++++++-- xen/tools/bin2c.c | 28 ++++++++++++++++++++++++++++ 7 files changed, 74 insertions(+), 2 deletions(-) create mode 100644 xen/tools/bin2c.c diff --git a/.gitignore b/.gitignore index 954c1da2cb..16dfbb8302 100644 --- a/.gitignore +++ b/.gitignore @@ -295,6 +295,7 @@ xen/arch/*/efi/boot.c xen/arch/*/efi/compat.c xen/arch/*/efi/efi.h xen/arch/*/efi/runtime.c +xen/common/config_data.c xen/include/headers*.chk xen/include/asm xen/include/asm-*/asm-offsets.h @@ -312,6 +313,7 @@ xen/test/livepatch/xen_bye_world.livepatch xen/test/livepatch/xen_hello_world.livepatch xen/test/livepatch/xen_nop.livepatch xen/test/livepatch/xen_replace_world.livepatch +xen/tools/bin2c xen/tools/kconfig/.tmp_gtkcheck xen/tools/kconfig/.tmp_qtcheck xen/tools/symbols diff --git a/docs/misc/hypfs-paths.pandoc b/docs/misc/hypfs-paths.pandoc index 2fe5455e6f..56ebdcd8be 100644 --- a/docs/misc/hypfs-paths.pandoc +++ b/docs/misc/hypfs-paths.pandoc @@ -53,3 +53,12 @@ tags enclosed in square brackets. #### / The root of the hypervisor file system. + +#### /buildinfo/ + +A directory containing static information generated while building the +hypervisor. + +#### /buildinfo/config = STRING + +The contents of the `xen/.config` file at the time of the hypervisor build. diff --git a/xen/common/Makefile b/xen/common/Makefile index a3f66aa0c0..de7e0fa645 100644 --- a/xen/common/Makefile +++ b/xen/common/Makefile @@ -1,6 +1,7 @@ obj-$(CONFIG_ARGO) += argo.o obj-y += bitmap.o obj-y += bsearch.o +obj-y += config_data.o obj-$(CONFIG_CORE_PARKING) += core_parking.o obj-y += cpu.o obj-y += cpupool.o @@ -79,3 +80,11 @@ subdir-$(CONFIG_UBSAN) += ubsan subdir-$(CONFIG_NEEDS_LIBELF) += libelf subdir-$(CONFIG_HAS_DEVICE_TREE) += libfdt + +config_data.c: ../.config + ( echo "char xen_config_data[] ="; \ + ../tools/bin2c <$<; \ + echo ";" ) > $@ + +clean:: + rm config_data.c 2>/dev/null || true diff --git a/xen/common/hypfs.c b/xen/common/hypfs.c index 7d9595dfa7..11b7b36e56 100644 --- a/xen/common/hypfs.c +++ b/xen/common/hypfs.c @@ -25,6 +25,10 @@ static struct hypfs_entry hypfs_root_entry = { .dir = &hypfs_root, }; +static struct hypfs_dir hypfs_buildinfo = { + .list = LIST_HEAD_INIT(hypfs_buildinfo.list), +}; + static int hypfs_add_entry(struct hypfs_dir *parent, struct hypfs_entry *new) { int ret = -ENOENT; @@ -312,3 +316,16 @@ long do_hypfs_op(unsigned int cmd, return ret; } + +static int __init hypfs_init(void) +{ + int ret; + + ret = hypfs_new_dir(&hypfs_root, "buildinfo", &hypfs_buildinfo); + BUG_ON(ret); + ret = hypfs_new_entry_string(&hypfs_buildinfo, "config", xen_config_data); + BUG_ON(ret); + + return 0; +} +__initcall(hypfs_init); diff --git a/xen/include/xen/kernel.h b/xen/include/xen/kernel.h index 548b64da9f..5ff2280b0f 100644 --- a/xen/include/xen/kernel.h +++ b/xen/include/xen/kernel.h @@ -100,5 +100,7 @@ extern enum system_state { bool_t is_active_kernel_text(unsigned long addr); +extern char xen_config_data[]; + #endif /* _LINUX_KERNEL_H */ diff --git a/xen/tools/Makefile b/xen/tools/Makefile index e940939d61..cd2bbbf647 100644 --- a/xen/tools/Makefile +++ b/xen/tools/Makefile @@ -1,13 +1,18 @@ include $(XEN_ROOT)/Config.mk +PROGS = symbols bin2c + .PHONY: default default: - $(MAKE) symbols + $(MAKE) $(PROGS) .PHONY: clean clean: - rm -f *.o symbols + rm -f *.o $(PROGS) symbols: symbols.c $(HOSTCC) $(HOSTCFLAGS) -o $@ $< + +bin2c: bin2c.c + $(HOSTCC) $(HOSTCFLAGS) -o $@ $< diff --git a/xen/tools/bin2c.c b/xen/tools/bin2c.c new file mode 100644 index 0000000000..c332399b70 --- /dev/null +++ b/xen/tools/bin2c.c @@ -0,0 +1,28 @@ +/* + * Unloved program to convert a binary on stdin to a C include on stdout + * + * Jan 1999 Matt Mackall + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + */ + +#include + +int main(int argc, char *argv[]) +{ + int ch, total = 0; + + do { + printf("\t\""); + while ((ch = getchar()) != EOF) { + total++; + printf("\\x%02x", ch); + if (total % 16 == 0) + break; + } + printf("\"\n"); + } while (ch != EOF); + + return 0; +}