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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BEE44CDB482 for ; Wed, 18 Oct 2023 14:14:55 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=AXmhYsR9; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4S9Xt638Kfz3cbL for ; Thu, 19 Oct 2023 01:14:54 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=AXmhYsR9; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=2604:1380:4601:e00::1; helo=ams.source.kernel.org; envelope-from=sashal@kernel.org; receiver=lists.ozlabs.org) Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4S9Xs86PF1z3dgN for ; Thu, 19 Oct 2023 01:14:04 +1100 (AEDT) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by ams.source.kernel.org (Postfix) with ESMTP id 545F8B82339; Wed, 18 Oct 2023 14:14:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F11D2C433B7; Wed, 18 Oct 2023 14:13:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1697638441; bh=TCNbTE+6TJoRfpfvUgsHM09kzW+uwZaM2+Gsnc4hXaM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AXmhYsR9kHpJ3f/nVvbuQ9pWe5bsboFSBf3GKjjwQyfQga+r8zMPOy/hfjDKZext3 C98rvV4JFHgDNxK/j2pLQT/gLIlOtHrSLNIacUTFsbbJIsaY2m6vzYyAvLB7YbwK2S SADaoK09FUBk7BFGIvOh090I4aib3aypXkKCaSne824e7Mixn8x5pw/+19pvv82vp4 ZxHKjOk9JUziiP2OjxYqkpqxHkgCg/b/7BhBRTG3w1gw94XMQaaWLeYveNNCqAjub1 lRvbB+8F9hhMq2NdyCxSStAM7LBaYTwkuzf4+MSRzBKu312hHI/PjTYKh4q2pwxeVZ kno1cpqIYCurA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 6.1 16/19] powerpc/85xx: Fix math emulation exception Date: Wed, 18 Oct 2023 10:13:18 -0400 Message-Id: <20231018141323.1334898-16-sashal@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231018141323.1334898-1-sashal@kernel.org> References: <20231018141323.1334898-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.1.58 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , masahiroy@kernel.org, npiggin@gmail.com, sv@linux.ibm.com, linuxppc-dev@lists.ozlabs.org, jpoimboe@kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Christophe Leroy [ Upstream commit 8e8a12ecbc86700b5e1a3596ce2b3c43dafad336 ] Booting mpc85xx_defconfig kernel on QEMU leads to: Bad trap at PC: fe9bab0, SR: 2d000, vector=800 awk[82]: unhandled trap (5) at 0 nip fe9bab0 lr fe9e01c code 5 in libc-2.27.so[fe5a000+17a000] awk[82]: code: 3aa00000 3a800010 4bffe03c 9421fff0 7ca62b78 38a00000 93c10008 83c10008 awk[82]: code: 38210010 4bffdec8 9421ffc0 7c0802a6 d8010008 4815190d 93810030 Trace/breakpoint trap WARNING: no useful console This is because allthough CONFIG_MATH_EMULATION is selected, Exception 800 calls unknown_exception(). Call emulation_assist_interrupt() instead. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/066caa6d9480365da9b8ed83692d7101e10ac5f8.1695657339.git.christophe.leroy@csgroup.eu Signed-off-by: Sasha Levin --- arch/powerpc/kernel/head_85xx.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/head_85xx.S b/arch/powerpc/kernel/head_85xx.S index 52c0ab416326a..0e16aea7853b8 100644 --- a/arch/powerpc/kernel/head_85xx.S +++ b/arch/powerpc/kernel/head_85xx.S @@ -394,7 +394,7 @@ interrupt_base: #ifdef CONFIG_PPC_FPU FP_UNAVAILABLE_EXCEPTION #else - EXCEPTION(0x0800, FP_UNAVAIL, FloatingPointUnavailable, unknown_exception) + EXCEPTION(0x0800, FP_UNAVAIL, FloatingPointUnavailable, emulation_assist_interrupt) #endif /* System Call Interrupt */ -- 2.40.1