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 F3CD2C43334 for ; Mon, 13 Jun 2022 10:49:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348046AbiFMKtJ (ORCPT ); Mon, 13 Jun 2022 06:49:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47420 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244542AbiFMKpc (ORCPT ); Mon, 13 Jun 2022 06:45:32 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BAAE423BEB; Mon, 13 Jun 2022 03:25:43 -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 ams.source.kernel.org (Postfix) with ESMTPS id D318EB80E95; Mon, 13 Jun 2022 10:25:41 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 34ED1C34114; Mon, 13 Jun 2022 10:25:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1655115940; bh=gDSkScukX2LSRwr4jVmPp/iYJ8xZ1NW+aQPq8tGwEL4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qTyHgK3Lfnh4Mby0QlvIlGQNPVjpRili4Pqz0gjk9w6k5OAnzrezMp+AyjV4IZBmc w9nIF4YCQTRWLZKnijHaXd4PyVOGhr9lkMdViye/tkaH3e1TrXBPAxiQUVwiEFWoFQ D0GOvyqg2Ncx92sg8xTi2NYCo5way6HAIHsBBrGk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, kernel test robot , Geert Uytterhoeven , Greg Ungerer , Sasha Levin Subject: [PATCH 4.14 076/218] m68k: math-emu: Fix dependencies of math emulation support Date: Mon, 13 Jun 2022 12:08:54 +0200 Message-Id: <20220613094922.723214296@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220613094908.257446132@linuxfoundation.org> References: <20220613094908.257446132@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Geert Uytterhoeven [ Upstream commit ed6bc6bf0a7d75e80eb1df883c09975ebb74e590 ] If CONFIG_M54xx=y, CONFIG_MMU=y, and CONFIG_M68KFPU_EMU=y: {standard input}:272: Error: invalid instruction for this architecture; needs 68000 or higher (68000 [68ec000, 68hc000, 68hc001, 68008, 68302, 68306, 68307, 68322, 68356], 68010, 68020 [68k, 68ec020], 68030 [68ec030], 68040 [68ec040], 68060 [68ec060], cpu32 [68330, 68331, 68332, 68333, 68334, 68336, 68340, 68341, 68349, 68360], fidoa [fido]) -- statement `sub.b %d1,%d3' ignored {standard input}:609: Error: invalid instruction for this architecture; needs 68020 or higher (68020 [68k, 68ec020], 68030 [68ec030], 68040 [68ec040], 68060 [68ec060]) -- statement `bfextu 4(%a1){%d0,#8},%d0' ignored {standard input}:752: Error: operands mismatch -- statement `mulu.l 4(%a0),%d3:%d0' ignored {standard input}:1155: Error: operands mismatch -- statement `divu.l %d0,%d3:%d7' ignored The math emulation support code is intended for 68020 and higher, and uses several instructions or instruction modes not available on coldfire or 68000. Originally, the dependency of M68KFPU_EMU on MMU was fine, as MMU support was only available on 68020 or higher. But this assumption was broken by the introduction of MMU support for M547x and M548x. Drop the dependency on MMU, as the code should work fine on 68020 and up without MMU (which are not yet supported by Linux, though). Add dependencies on M68KCLASSIC (to rule out Coldfire) and FPU (kernel has some type of floating-point support --- be it hardware or software emulated, to rule out anything below 68020). Fixes: 1f7034b9616e6f14 ("m68k: allow ColdFire 547x and 548x CPUs to be built with MMU enabled") Reported-by: kernel test robot Signed-off-by: Geert Uytterhoeven Reviewed-by: Greg Ungerer Link: https://lore.kernel.org/r/18c34695b7c95107f60ccca82a4ff252f3edf477.1652446117.git.geert@linux-m68k.org Signed-off-by: Sasha Levin --- arch/m68k/Kconfig.cpu | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu index ff5f0896318b..6f13c53c8dc7 100644 --- a/arch/m68k/Kconfig.cpu +++ b/arch/m68k/Kconfig.cpu @@ -308,7 +308,7 @@ comment "Processor Specific Options" config M68KFPU_EMU bool "Math emulation support" - depends on MMU + depends on M68KCLASSIC && FPU help At some point in the future, this will cause floating-point math instructions to be emulated by the kernel on machines that lack a -- 2.35.1