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 F129DC433EF for ; Thu, 20 Jan 2022 07:41:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358139AbiATHlr (ORCPT ); Thu, 20 Jan 2022 02:41:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50684 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357767AbiATHl0 (ORCPT ); Thu, 20 Jan 2022 02:41:26 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EDC1AC06175A; Wed, 19 Jan 2022 23:41:25 -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 ams.source.kernel.org (Postfix) with ESMTPS id B78A9B81CEE; Thu, 20 Jan 2022 07:41:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5E956C340E0; Thu, 20 Jan 2022 07:41:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642664483; bh=0DWs5iJTfzb/AG7lBwtZhAg40maM1nWs2s2i8EajS74=; h=From:To:Cc:Subject:Date:From; b=ohPrm6RhMpzE4PJlBhzIO3QqmUDGTsZfaWa3yx7kYhp77CPkEpEvQD0hxMOddg/sI X+Vh7CX4N/iTsOYZ8VrjPyRGbHwGVnaEcJ+C3ylQMe3oumyRaD65kUkajfLyGkd8UK ZvG57y7Zcx4obNSxVmqlUHQkUgaI3unxJA4Xh6WlaJ3+toi+3veYV5AezAWsrDh/PE 8DkpJz5RmxyeX3aH1XLDkYOgusQRgiAVZ2TMieh7eVtq0MhRiXfC/XDCAfV9T1e5Cr TLw2nQmDhnUcV1kzzLVWqm2XfVt7PjqZZIaLUKc7iknEOJTJ+Q+n9RJ1uzH4Y3FIwr AFlRcf0qvQeeg== 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-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, inux-parisc@vger.kernel.org, linux-mips@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, Guo Ren Subject: [PATCH V3 15/17] riscv: compat: Add UXL_32 support in start_thread Date: Thu, 20 Jan 2022 15:39:08 +0800 Message-Id: <20220120073911.99857-16-guoren@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guo Ren If the current task is in COMPAT mode, set SR_UXL_32 in status for returning userspace. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Cc: Arnd Bergmann --- 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) -- 2.25.1