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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2921AC6FD1D for ; Mon, 20 Mar 2023 15:35:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232994AbjCTPfN (ORCPT ); Mon, 20 Mar 2023 11:35:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56584 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233067AbjCTPek (ORCPT ); Mon, 20 Mar 2023 11:34:40 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2ED2736FC8 for ; Mon, 20 Mar 2023 08:27:23 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 3AC476157F for ; Mon, 20 Mar 2023 15:27:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4EB3EC433EF; Mon, 20 Mar 2023 15:27:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1679326041; bh=JGoVHzgVWqTkRaEk8LYC+vjk6fqlImbqLIvIF5tP868=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IdoTTTmPQuqnZf5dm86EeroEq7nRQfV7w8RJZgVPzZggZ9aD107fEsWRoJDBr2Trx J9InQOieV5v/2+xR4+G/WR/F7Wlhsv2/FTDlNjcru2TO1da43Myv9LyrtxBoCR3Tq5 xXFwgv43ZxyuxsO+vSb1YCBaou7YLAuYnwkjjw4w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jan-Benedict Glaw , Christophe Leroy , =?UTF-8?q?Pali=20Roh=C3=A1r?= , Michael Ellerman Subject: [PATCH 6.1 190/198] powerpc: Pass correct CPU reference to assembler Date: Mon, 20 Mar 2023 15:55:28 +0100 Message-Id: <20230320145515.427843068@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230320145507.420176832@linuxfoundation.org> References: <20230320145507.420176832@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Christophe Leroy commit bfb03af71a3798b5a88a945a9c19ad67e1c4986d upstream. Jan-Benedict reported issue with building ppc64e_defconfig with mainline GCC work: powerpc64-linux-gcc -Wp,-MMD,arch/powerpc/kernel/vdso/.gettimeofday-64.o.d -nostdinc -I./arch/powerpc/include -I./arch/powerpc/include/generated -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/compiler-version.h -include ./include/linux/kconfig.h -D__KERNEL__ -I ./arch/powerpc -DHAVE_AS_ATHIGH=1 -fmacro-prefix-map=./= -D__ASSEMBLY__ -fno-PIE -m64 -Wl,-a64 -mabi=elfv1 -Wa,-me500 -Wa,-me500mc -mabi=elfv1 -mbig-endian -Wl,-soname=linux-vdso64.so.1 -D__VDSO64__ -s -c -o arch/powerpc/kernel/vdso/gettimeofday-64.o arch/powerpc/kernel/vdso/gettimeofday.S arch/powerpc/kernel/vdso/gettimeofday.S: Assembler messages: arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode: `stdu' arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode: `stdu' arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode: `std' arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode: `std' arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode: `ld' arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode: `ld' ... make[1]: *** [arch/powerpc/kernel/vdso/Makefile:76: arch/powerpc/kernel/vdso/gettimeofday-64.o] Error 1 make: *** [arch/powerpc/Makefile:387: vdso_prepare] Error 2 This is due to assembler being called with -me500mc which is a 32 bits target. The problem comes from the fact that CONFIG_PPC_E500MC is selected for both the e500mc (32 bits) and the e5500 (64 bits), and therefore the following makefile rule is wrong: cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) Today we have CONFIG_TARGET_CPU which provides the identification of the expected CPU, it is used for GCC. Once GCC knows the target CPU, it adds the correct CPU option to assembler, no need to add it explicitly. With that change (And also commit 45f7091aac35 ("powerpc/64: Set default CPU in Kconfig")), it now is: powerpc64-linux-gcc -Wp,-MMD,arch/powerpc/kernel/vdso/.gettimeofday-64.o.d -nostdinc -I./arch/powerpc/include -I./arch/powerpc/include/generated -I./include -I./arch/powerpc/include/uapi -I./arch/powerpc/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/compiler-version.h -include ./include/linux/kconfig.h -D__KERNEL__ -I ./arch/powerpc -DHAVE_AS_ATHIGH=1 -fmacro-prefix-map=./= -D__ASSEMBLY__ -fno-PIE -m64 -Wl,-a64 -mabi=elfv1 -mcpu=e500mc64 -mabi=elfv1 -mbig-endian -Wl,-soname=linux-vdso64.so.1 -D__VDSO64__ -s -c -o arch/powerpc/kernel/vdso/gettimeofday-64.o arch/powerpc/kernel/vdso/gettimeofday.S Reported-by: Jan-Benedict Glaw Signed-off-by: Christophe Leroy Acked-by: Pali Rohár [mpe: Retain -Wa,-mpower4 -Wa,-many for Book3S 64 builds for now] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/758ad54128fa9dd2fdedc4c511592111cbded900.1671475543.git.christophe.leroy@csgroup.eu Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/Makefile | 4 ---- 1 file changed, 4 deletions(-) --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -201,10 +201,7 @@ KBUILD_CFLAGS += -fno-asynchronous-unwin # often slow when they are implemented at all KBUILD_CFLAGS += $(call cc-option,-mno-string) -cpu-as-$(CONFIG_40x) += -Wa,-m405 -cpu-as-$(CONFIG_44x) += -Wa,-m440 cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) -cpu-as-$(CONFIG_PPC_E500) += -Wa,-me500 # When using '-many -mpower4' gas will first try and find a matching power4 # mnemonic and failing that it will allow any valid mnemonic that GAS knows @@ -212,7 +209,6 @@ cpu-as-$(CONFIG_PPC_E500) += -Wa,-me500 # LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675 # but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway... cpu-as-$(CONFIG_PPC_BOOK3S_64) += $(call as-option,-Wa$(comma)-mpower4) $(call as-option,-Wa$(comma)-many) -cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) KBUILD_AFLAGS += $(cpu-as-y) KBUILD_CFLAGS += $(cpu-as-y)