From patchwork Fri Dec 22 11:57:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guo Ren X-Patchwork-Id: 13503255 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 BAA82C46CD8 for ; Fri, 22 Dec 2023 11:57:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=K2AZlmWIt+bmAma3+PNbI80Rb5mGGBeQxrAnMDcFGf8=; b=tpnHLSx9oPjWyI 2hS1+axkmKRocG81fiSl/GnSoL8ApBl7OfTX1ydRDjbpSVFlQ0qXKc9zhF/dIRDj0kDF9De3Daiob iyCjrEbu53NqtrojZPNDFUk81P3ANS4u7WJDT2QSRByOPP6QljWln9DAZVpgBrmBZ1ByO5wargr/W KZkQeBmhgtNtibuRTmBbBlPQGRIljXnrajd1z/ksm5TO/LpqoQJNwMWqUjL1YlF8a2haru81rItAw LXUXYYwvN/yq8ukLcpEiOYLqobwpAWM0a3Bh7GDZ+cf6yjVeUesJIvXUdWIh197d3iiJYsym9PQSk v+GRgVFDsZWW7U3Buz9A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rGe9i-005sGy-12; Fri, 22 Dec 2023 11:57:30 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rGe9f-005sFn-1n for linux-riscv@lists.infradead.org; Fri, 22 Dec 2023 11:57:28 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 2A59C61B60; Fri, 22 Dec 2023 11:57:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7A7F8C433C8; Fri, 22 Dec 2023 11:57:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1703246245; bh=OMHoJ47sH8QL4h4TQhZ+b4gxch9yOK4WdYt6lzVlcv4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b9qp0VEOGkrFAhxqIe4d6Y9gIs4x6sOfZwhGePIfwsqsVInwDYDn9xyPy0D6jHDf8 l80dp1DCIjiaIdq+5PnC7VMWBk1I1MVo2Kvz3lRX0lS+aStpiAEZpUTJ8a+nK6Cisq NPYiyqFkNnPd8iWk2opA3z9L0YWxKnMqBqifWtQZIoRcJt3hQZ5/8BdK20/JycOtV9 Vbu+Nf5bLXqImKx4F3uGjyRTiWakhBpnEd8OBDrR5Ky3U9rAjZcwI9w4n3wFEDlAUO JZQPQG3kpw5ZQVC2kAlMqOCLgqXJ97JXpA6tIzhx/yl2RMQQcSH9BYkEJx/5wHioZL HHbRAb8qWlz/w== From: guoren@kernel.org To: linux-kernel@vger.kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, alexghiti@rivosinc.com, charlie@rivosinc.com, xiao.w.wang@intel.com, guoren@kernel.org, david@redhat.com, panqinglin2020@iscas.ac.cn, rick.p.edgecombe@intel.com, willy@infradead.org, bjorn@rivosinc.com, conor.dooley@microchip.com, cleger@rivosinc.com, leobras@redhat.com Cc: linux-riscv@lists.infradead.org, Guo Ren , stable@vger.kernel.org Subject: [PATCH V3 1/4] riscv: mm: Fixup compat mode boot failure Date: Fri, 22 Dec 2023 06:57:00 -0500 Message-Id: <20231222115703.2404036-2-guoren@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231222115703.2404036-1-guoren@kernel.org> References: <20231222115703.2404036-1-guoren@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231222_035727_635113_7870C1A7 X-CRM114-Status: UNSURE ( 9.80 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Guo Ren In COMPAT mode, the STACK_TOP is DEFAULT_MAP_WINDOW (0x80000000), but the TASK_SIZE is 0x7fff000. When the user stack is upon 0x7fff000, it will cause a user segment fault. Sometimes, it would cause boot failure when the whole rootfs is rv32. Freeing unused kernel image (initmem) memory: 2236K Run /sbin/init as init process Starting init: /sbin/init exists but couldn't execute it (error -14) Run /etc/init as init process ... Increase the TASK_SIZE to cover STACK_TOP. Cc: stable@vger.kernel.org Fixes: add2cc6b6515 ("RISC-V: mm: Restrict address space for sv39,sv48,sv57") Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Leonardo Bras Reviewed-by: Charlie Jenkins --- arch/riscv/include/asm/pgtable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index ab00235b018f..74ffb2178f54 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -881,7 +881,7 @@ static inline pte_t pte_swp_clear_exclusive(pte_t pte) #define TASK_SIZE_MIN (PGDIR_SIZE_L3 * PTRS_PER_PGD / 2) #ifdef CONFIG_COMPAT -#define TASK_SIZE_32 (_AC(0x80000000, UL) - PAGE_SIZE) +#define TASK_SIZE_32 (_AC(0x80000000, UL)) #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \ TASK_SIZE_32 : TASK_SIZE_64) #else