From patchwork Fri Mar 26 00:04:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nathan Chancellor X-Patchwork-Id: 410361 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=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 B06CCC433DB for ; Fri, 26 Mar 2021 00:06:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F20A61A13 for ; Fri, 26 Mar 2021 00:06:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229779AbhCZAFd (ORCPT ); Thu, 25 Mar 2021 20:05:33 -0400 Received: from mail.kernel.org ([198.145.29.99]:60224 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230035AbhCZAFC (ORCPT ); Thu, 25 Mar 2021 20:05:02 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3EA7C61A36; Fri, 26 Mar 2021 00:05:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1616717102; bh=9/29N/4yLblEnOYYfPpTSkMrTA51czELTdv1FroKk14=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aB1LzYuEPu8fVe1jy4nf23gaZvjSO/LqgsDj9GjIHg0j7vlEYUJqBjzkFoX/E42Sj 4PvO42XhIEcB/okZVfaDGGd92F9SeTDeXL6HzOqQso/BN4sSRqgVoxjm5d6XHrUbrX QpWfg5CEX648X5IAozxW8CUAuQIINXytnL/wadfsUDQYkGqpNfxBW51u+zeE2hvYJN KlGxOYwuXDtygNl3Zh7FivikovMQ9V34f5U32ChpASgZFu+Qj+LY56wdoo/MoU0B+X h5HqPPQIUElcgvoHTC0OhXUJrprNO2BomAAs7gv8L0meoaqWK9yI/Qml1+9h9dfIwH bK9woXfXsfWag== From: Nathan Chancellor To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, Ard Biesheuvel Cc: Nick Desaulniers , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Nathan Chancellor Subject: [PATCH 2/3] x86/boot: Add $(CLANG_FLAGS) to compressed KBUILD_CFLAGS Date: Thu, 25 Mar 2021 17:04:34 -0700 Message-Id: <20210326000435.4785-3-nathan@kernel.org> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20210326000435.4785-1-nathan@kernel.org> References: <20210326000435.4785-1-nathan@kernel.org> MIME-Version: 1.0 X-Patchwork-Bot: notify Precedence: bulk List-ID: X-Mailing-List: linux-efi@vger.kernel.org When cross compiling x86 on an ARM machine with clang, there are several errors along the lines of: arch/x86/include/asm/string_64.h:27:10: error: invalid output constraint '=&c' in asm This happens because the compressed boot Makefile reassigns KBUILD_CFLAGS and drops the clang flags that set the target architecture ('--target=') and the path to the GNU cross tools ('--prefix='), meaning that the host architecture is targeted. These flags are available as $(CLANG_FLAGS) from the main Makefile so add them to the compressed boot folder's KBUILD_CFLAGS so that cross compiling works as expected. Signed-off-by: Nathan Chancellor --- arch/x86/boot/compressed/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index e0bc3988c3fa..6e5522aebbbd 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -46,6 +46,7 @@ KBUILD_CFLAGS += -D__DISABLE_EXPORTS # Disable relocation relaxation in case the link is not PIE. KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mrelax-relocations=no) KBUILD_CFLAGS += -include $(srctree)/include/linux/hidden.h +KBUILD_CFLAGS += $(CLANG_FLAGS) # sev-es.c indirectly inludes inat-table.h which is generated during # compilation and stored in $(objtree). Add the directory to the includes so