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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 DDCB5C10F11 for ; Wed, 10 Apr 2019 20:13:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B44342077C for ; Wed, 10 Apr 2019 20:13:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726635AbfDJUNP (ORCPT ); Wed, 10 Apr 2019 16:13:15 -0400 Received: from mout.kundenserver.de ([212.227.126.130]:36257 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726014AbfDJUNO (ORCPT ); Wed, 10 Apr 2019 16:13:14 -0400 Received: from wuerfel.lan ([149.172.19.189]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.129]) with ESMTPA (Nemesis) id 1MlNYj-1gTSBm1LDx-00lmDM; Wed, 10 Apr 2019 22:13:03 +0200 From: Arnd Bergmann To: Martin Schwidefsky , Heiko Carstens , Vasily Gorbik Cc: clang-built-linux@googlegroups.com, Nick Desaulniers , Nathan Chancellor , linux-s390@vger.kernel.org, Arnd Bergmann , Masahiro Yamada , Philipp Rudo , Tony Krowiak , linux-kernel@vger.kernel.org Subject: [PATCH 1/2] s390: only build for new CPUs with clang Date: Wed, 10 Apr 2019 22:12:40 +0200 Message-Id: <20190410201300.3528984-1-arnd@arndb.de> X-Mailer: git-send-email 2.20.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:YFRyT6qgQvR+qhv9mS8yRRrUceXDy65GVtgAlXxGmTGhW0mDZ+G sI/5jMlMr9MwxKef2jS8TKnJ35YjTPZiEl5+ul6LZtq5sYpgcpjtrdmOGN+kYg5Yf5+YfpG +w2AA30VLJNmhdTbBnuHrUJ4K5zwSGeU5ZShR3lWtHUZJuPOjblN5alLhDr6d0JDiD1uz6b GgBiBUG+OU4uh4bsgH7Bw== X-UI-Out-Filterresults: notjunk:1;V03:K0:jjrGWuM0PD8=:IlJsEhIuRgSxnbYHMlwwo0 nd30BGZEK74vNeQuI/ufq5rl1AIJohJA4P2XKvdQ3If1ZZRxy+o83hx+oe5yPPy4aO6I4HT5J TGjN/S6DQzQuoWZK9DdfL5p2+E8l/LloGpxH3pWhOLun0GQKmDswrA6fTPkatx7SIsDRC+sri /aUWngk3I9cxPYzZ7PAvhAZbYJf0zEIafKTbNGt9gZ1gYVjix660Q/9z6nzd01e3oP/mLnSEb FoApA+gTSBOjl//k6tyKnhb2JVzOVoNYZk+gkxqiKVxxdheSRvz2h55H4hzc5FZM8UwYqPCVK 330bxP+a9vKOTmY7+Df4z4v0zmczImwk2XZwFblLh4G9NGhPq+ryz6MTdUylJn+Nicy4h482c +T2ZX7WHUB2rZkU4sr7vn7EkMSEUdlcpiup3DT9U+JYoxCrJ4ntQC7nEYt36Krf3bXrbXy2T+ uGG8tCPkZ/GYb6W5hIQUl9KSl8turbEFevbh0G+F36XL9bD7ZYBBbQvyOooTHDPCpjcCMn6wG wxR0bd00C4O+jSm25UF5c2eu0joELQOK5wi1738vh2cjK9OZFvkYwDnL5tWPsFl4Ov3Ta33ow nUOkGf+CGuD/jRhS0EH8XyI1/MuAH+Ma4x/769f746b12wdDgdXkDEVBOi5PsJw4j/T/mQXiD jBRpEgRna3UtJwAcORKoCglo8oeBzTL5WUm3BA3dmdHhJgSpDijFbilRaVYj2TvTLEFStPWF4 O43oURSkRqt2BUOyJnElK/3e58ow1BEOZXPEwQ== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org llvm does does not understand -march=z9-109 and older target specifiers, so disable the respective Kconfig settings and the logic to make the boot code work on old systems when building with clang. Signed-off-by: Arnd Bergmann --- arch/s390/Kconfig | 6 ++++++ arch/s390/boot/Makefile | 2 ++ 2 files changed, 8 insertions(+) diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 8cd860cba4d1..1a2eec61196d 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -240,6 +240,7 @@ choice config MARCH_Z900 bool "IBM zSeries model z800 and z900" + depends on !CC_IS_CLANG select HAVE_MARCH_Z900_FEATURES help Select this to enable optimizations for model z800/z900 (2064 and @@ -248,6 +249,7 @@ config MARCH_Z900 config MARCH_Z990 bool "IBM zSeries model z890 and z990" + depends on !CC_IS_CLANG select HAVE_MARCH_Z990_FEATURES help Select this to enable optimizations for model z890/z990 (2084 and @@ -256,6 +258,7 @@ config MARCH_Z990 config MARCH_Z9_109 bool "IBM System z9" + depends on !CC_IS_CLANG select HAVE_MARCH_Z9_109_FEATURES help Select this to enable optimizations for IBM System z9 (2094 and @@ -347,12 +350,15 @@ config TUNE_DEFAULT config TUNE_Z900 bool "IBM zSeries model z800 and z900" + depends on !CC_IS_CLANG config TUNE_Z990 bool "IBM zSeries model z890 and z990" + depends on !CC_IS_CLANG config TUNE_Z9_109 bool "IBM System z9" + depends on !CC_IS_CLANG config TUNE_Z10 bool "IBM System z10" diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile index c844eaf24ed7..953a74d04990 100644 --- a/arch/s390/boot/Makefile +++ b/arch/s390/boot/Makefile @@ -11,6 +11,7 @@ KASAN_SANITIZE := n KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR) KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR) +ifndef CONFIG_CC_IS_CLANG # # Use -march=z900 for als.c to be able to print an error # message if the kernel is started on a machine which is too old @@ -25,6 +26,7 @@ CFLAGS_als.o += -march=z900 CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH) CFLAGS_sclp_early_core.o += -march=z900 endif +endif CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char -- 2.20.0