From patchwork Sat Jan 29 12:17:21 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guo Ren X-Patchwork-Id: 12729478 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 42AFAC433FE for ; Sat, 29 Jan 2022 12:19:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243864AbiA2MTN (ORCPT ); Sat, 29 Jan 2022 07:19:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52504 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345387AbiA2MSx (ORCPT ); Sat, 29 Jan 2022 07:18:53 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC40CC061751; Sat, 29 Jan 2022 04:18:51 -0800 (PST) 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 8B78360B65; Sat, 29 Jan 2022 12:18:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 25475C340EE; Sat, 29 Jan 2022 12:18:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643458731; bh=yfEc7zgR3yCBk8Yfn7aWFLEsFQj0j+xfa9v6cbpF6Vc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pdpjdGlMRcHuKdx8nas7nPKxC+10cSp8Gfll1lqGgxvkbB8YMYFeOfPCOFz0wFp+u 9/wmW0N0MD8TmY+dIFAVv+uY/IExYZRNW0QrxlGzf4RTm0Z6GxFGAc1jqtvqVIIhMp hrqQ5ZFYS2uBzY7I/NxA2chymSofMTj6klfxdNpbbHDT+y+GzHDaiCYfQ+qc2nJ+WK rPN+CcR7X4tlP/Io4QKbVho8BBzc8L27AzR3L8Vx/GRx0Tr9dBKAMH0FhiaM30UbJz TfMy5Ok9Ke1Ki9f6sQIR2w/W22msyhxmfPJYSbES6kdtGlinYTgx6ugDgmejCvK78W oZZH/n08IfzQg== From: guoren@kernel.org To: guoren@kernel.org, palmer@dabbelt.com, arnd@arndb.de, anup@brainfault.org, gregkh@linuxfoundation.org, liush@allwinnertech.com, wefu@redhat.com, drew@beagleboard.org, wangjunqiang@iscas.ac.cn, hch@lst.de, hch@infradead.org Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-csky@vger.kernel.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-parisc@vger.kernel.org, linux-mips@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, Guo Ren Subject: [PATCH V4 10/17] riscv: compat: process: Add UXL_32 support in start_thread Date: Sat, 29 Jan 2022 20:17:21 +0800 Message-Id: <20220129121728.1079364-11-guoren@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220129121728.1079364-1-guoren@kernel.org> References: <20220129121728.1079364-1-guoren@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org From: Guo Ren If the current task is in COMPAT mode, set SR_UXL_32 in status for returning userspace. We need CONFIG _COMPAT to prevent compiling errors with rv32 defconfig. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Arnd Bergmann Cc: Palmer Dabbelt --- arch/riscv/kernel/process.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c index 03ac3aa611f5..1a666ad299b4 100644 --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -97,6 +97,11 @@ void start_thread(struct pt_regs *regs, unsigned long pc, } regs->epc = pc; regs->sp = sp; + +#ifdef CONFIG_COMPAT + if (is_compat_task()) + regs->status |= SR_UXL_32; +#endif } void flush_thread(void)