From patchwork Mon Mar 8 18:46:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 12123281 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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 C7A70C433E0 for ; Mon, 8 Mar 2021 18:47:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9129565224 for ; Mon, 8 Mar 2021 18:47:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229701AbhCHSrM (ORCPT ); Mon, 8 Mar 2021 13:47:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56490 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231195AbhCHSrA (ORCPT ); Mon, 8 Mar 2021 13:47:00 -0500 Received: from mail-qk1-x749.google.com (mail-qk1-x749.google.com [IPv6:2607:f8b0:4864:20::749]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AA5B4C06174A for ; Mon, 8 Mar 2021 10:47:00 -0800 (PST) Received: by mail-qk1-x749.google.com with SMTP id h21so8051459qkl.12 for ; Mon, 08 Mar 2021 10:47:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:message-id:mime-version:subject:from:to:cc; bh=Qzw87IjpyPEnnpaW2VW2opErpv1GSjEUj7UuHD/O6I4=; b=a6xeuAP3eXwT8Dwq5ALbVXDnhin4gW/L2S8GMZCTALGiwze1HVRxvy5AOiKBgz7LSD 9Q74FeR/muNa84dAGfprso7rf5tZTSRSpORRUeq8AcGwbqIOzU4gN9yG3R+aoW5PvFLP YiJNzKFnJYE0gBIBZzf/wYKe+4352iECO40TvYoJH6LigNlRBNvDrM1EH5jnN5X90O16 zUkFSBRD1Y+sxJJMbmSAubnPwV7dZfBN4YozGeOeOglTFF+XStp5Wg/ZVa0XP+Iuz532 3LPzlaioezslgSrkgWewg0sB+1bHZEce+4R7oyxzcveyL0N4/8zrQJg7dcjId6twD6FP PJvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:message-id:mime-version:subject:from :to:cc; bh=Qzw87IjpyPEnnpaW2VW2opErpv1GSjEUj7UuHD/O6I4=; b=I3wmACRF4ejN7Pxih5ZuDUeYggX5561MJHSs9eOAaPIhskNtOmNfIELnhFkDJtvEsO BV0fuG/02mLrjVtGBty2IfMPgw2gMKF47brMgngJg0rxo5tUjxs3GSZSKse35Jtt870a MV975Qsfi/8xcb5ccLhcwW9zK9w0ajlWzigUaFu3p2V7RO9Y7WKwWDVgiWB0+bgxJf67 WnFP1FukTZvsuER6cehQp2qEs9u/rYR+tLSjFGeHWlzrz45dbPWLh39nZ/vg+jcqIg9Q IPzi1QB8tEZhs9YVXEBHhDRNwp814XfjsjFsHT9fGJZIR3zcaJY3ucZqpE05h4cgedwu fdEg== X-Gm-Message-State: AOAM532WdlY/NTS3yDLDgowpHqI9O7JbY5mE2OWFT5FlE8MzWIlViSZ6 1KIqIF79xIg+q8nxuDF3h7UkCkhEGf9nNOS0Xc4= X-Google-Smtp-Source: ABdhPJxg4hio5XYPFHLtQ71d/4pZywp6EIOqqNBTmGBHjnMJQFpkBYe/mvvXKQqQCyRDRdf3lWGC2LzWCCuLT3E+L8M= Sender: "samitolvanen via sendgmr" X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:8dbc:8d66:eebd:6d0e]) (user=samitolvanen job=sendgmr) by 2002:a0c:ee89:: with SMTP id u9mr22247920qvr.40.1615229219742; Mon, 08 Mar 2021 10:46:59 -0800 (PST) Date: Mon, 8 Mar 2021 10:46:56 -0800 Message-Id: <20210308184656.1914947-1-samitolvanen@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.30.1.766.gb4fecdf3b7-goog Subject: [PATCH] kbuild: Allow LTO to be selected with KASAN_HW_TAGS From: Sami Tolvanen To: Masahiro Yamada , Kees Cook Cc: Nick Desaulniers , Nathan Chancellor , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, Sami Tolvanen , Alistair Delva Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org While LTO with KASAN is normally not useful, hardware tag-based KASAN can be used also in production kernels with ARM64_MTE. Therefore, allow KASAN_HW_TAGS to be selected together with HAS_LTO_CLANG. Reported-by: Alistair Delva Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- arch/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) base-commit: 144c79ef33536b4ecb4951e07dbc1f2b7fa99d32 diff --git a/arch/Kconfig b/arch/Kconfig index 2bb30673d8e6..2e7139b39e8f 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -638,7 +638,7 @@ config HAS_LTO_CLANG depends on $(success,$(AR) --help | head -n 1 | grep -qi llvm) depends on ARCH_SUPPORTS_LTO_CLANG depends on !FTRACE_MCOUNT_USE_RECORDMCOUNT - depends on !KASAN + depends on !KASAN || KASAN_HW_TAGS depends on !GCOV_KERNEL help The compiler and Kconfig options support building with Clang's