From mboxrd@z Thu Jan 1 00:00:00 1970 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=-12.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 47BEBC433DF for ; Fri, 9 Oct 2020 16:21:12 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 BBE922225D for ; Fri, 9 Oct 2020 16:21:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="IJQiN3r7"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="AhkHxYzR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BBE922225D Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:To:From:Subject:References:Mime-Version:Message-Id: In-Reply-To:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=t2oWMeExGkAFehUQlDC3I+o5B+bq7U29Qci1G+kXMYk=; b=IJQiN3r7r+tb1dgBvFE1UxaIE hKH9MqoWz6aFElAMkwJy5vjSxBdvV/F9T03dcRETuLKAyQk9Kg8Rh3F1VnQA/D5qOsBpQk6SS0soA H2TBcsvDUSHunbEPMIVPte5KfBqHtY72AiHz+NyiF03/DFIqEy9vTJvjAeMIr5bNeNHjl8irLVIM1 XCVf1hNat2GN6ZVvZ2jEUL7RTKNYm1Ykb9j20TEK7qBeHcXXyorxxXCt0sWh/lD/sJyvvRIPxL+t8 j2ZE6bCfx0W9LAmbCaKZhQNgg3N5u2sfqmBGMmn02asXQMvrT8NS0CG73Fbh1L4D6LiTLRZw6fxOt jz3y6jsrA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kQv6e-0005YJ-Bi; Fri, 09 Oct 2020 16:18:56 +0000 Received: from mail-yb1-xb49.google.com ([2607:f8b0:4864:20::b49]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kQv2Y-0002uY-1u for linux-arm-kernel@lists.infradead.org; Fri, 09 Oct 2020 16:14:46 +0000 Received: by mail-yb1-xb49.google.com with SMTP id p187so9502216ybg.14 for ; Fri, 09 Oct 2020 09:14:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=NB4DqWz6+fIfMXcokXEeMggmgfFph8OJ/Hk6TSxy9cU=; b=AhkHxYzRBPj/XJc+I+tSr0RiU0OcKXhG858USQ2XCMZuaxZyiy+g6jLac1sKgPZkmQ IpfxzQBVHjJbu7XyXKnwuU3h2iDU3Qo9Q9riCIuYsiJStNj7+zP6DobDo6JUsTt/uU5X sS/Ud4WqyktJlMHCohe00S3oN1qQnvtTIGMf5PjJ/AebsJSm5HJAmbK3jI1/r22MsS8j aBycGq29qN3837fJuinfVGidbF61PWBOcwM8avPXijIUbf320rf5bPez6o8eyG4GJcqo 8GrTNB9eNsr7XmafE+UUkeoqI72v1L7GOJR8z8Dl93xKDV5FHpCenkhAfBV/XfH7Ojhe Qy+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=NB4DqWz6+fIfMXcokXEeMggmgfFph8OJ/Hk6TSxy9cU=; b=H1jCiedK7ZR9/1J64Ms6VxazFiKXVKNa/xScbn+p2RVDeicgdmFxE89ue+yeDgAv7+ llfHD9JfqDlmTrZ+/v9/8BbiDBavjS84DRNGOkBm5wfLdggMcYYgDpXZTBCQ48Z9975h UGcZtchlM00mk4nCXQ4JlBcbuK3D+G8i9vMzy+Oqk1ibUv0We0CjCxPbmLmCLNdgvE4s TpIiQqvyoISof7rdjGQ3bTvjqqSpyN/AMP3YsaDz9zlFqHzlZt/UK48YPizwd+5pPrdN S3NFu6TZrHyIgHT0Ffn284mqDCOxwh3PyMCPnQPx4tPo7oqHAP+chd77cX7m4+A+m1rx 4TUw== X-Gm-Message-State: AOAM530RcmDBFMeEO9HMw7C/FXJGKzk8szff6JZ/2Av5Ht2gtuE9QFTJ Gyh2K7KK4QcfQCjDFKaBr6vk4Y8xgv7eO2/tajw= X-Google-Smtp-Source: ABdhPJxaJS43CCLL31/jkDf8wz6tkxfGqxkaqI+Vp1g2cuChf4yD2OTPN2MaVCPnWOi9s9tnyrnkwRjGNGy9G2wlsVE= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:a25:df91:: with SMTP id w139mr1273962ybg.13.1602260078214; Fri, 09 Oct 2020 09:14:38 -0700 (PDT) Date: Fri, 9 Oct 2020 09:13:38 -0700 In-Reply-To: <20201009161338.657380-1-samitolvanen@google.com> Message-Id: <20201009161338.657380-30-samitolvanen@google.com> Mime-Version: 1.0 References: <20201009161338.657380-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.1011.ga647a8990f-goog Subject: [PATCH v5 29/29] x86, build: allow LTO_CLANG and THINLTO to be selected From: Sami Tolvanen To: Masahiro Yamada , Will Deacon , Steven Rostedt X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201009_121442_163614_F0A68A91 X-CRM114-Status: GOOD ( 11.18 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, x86@kernel.org, Kees Cook , "Paul E. McKenney" , kernel-hardening@lists.openwall.com, Peter Zijlstra , Greg Kroah-Hartman , linux-kbuild@vger.kernel.org, Nick Desaulniers , linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Sami Tolvanen , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Pass code model and stack alignment to the linker as these are not stored in LLVM bitcode, and allow both CONFIG_LTO_CLANG and CONFIG_THINLTO to be selected. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- arch/x86/Kconfig | 2 ++ arch/x86/Makefile | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 6d67646153bc..c579d7000b67 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -92,6 +92,8 @@ config X86 select ARCH_SUPPORTS_ACPI select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 + select ARCH_SUPPORTS_LTO_CLANG if X86_64 + select ARCH_SUPPORTS_THINLTO if X86_64 select ARCH_USE_BUILTIN_BSWAP select ARCH_USE_QUEUED_RWLOCKS select ARCH_USE_QUEUED_SPINLOCKS diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 154259f18b8b..774a7debb27c 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -173,6 +173,11 @@ ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,) endif +ifdef CONFIG_LTO_CLANG +KBUILD_LDFLAGS += -plugin-opt=-code-model=kernel \ + -plugin-opt=-stack-alignment=$(if $(CONFIG_X86_32),4,8) +endif + # Workaround for a gcc prelease that unfortunately was shipped in a suse release KBUILD_CFLAGS += -Wno-sign-compare # -- 2.28.0.1011.ga647a8990f-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel