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 2D52FC433F5 for ; Thu, 20 Jan 2022 07:49:41 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4JfZR76Cqqz3fCy for ; Thu, 20 Jan 2022 18:49:39 +1100 (AEDT) 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=ohPrm6Rh; 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=guoren@kernel.org; receiver=) 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=ohPrm6Rh; dkim-atps=neutral Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4JfZFh3jp9z3cYN for ; Thu, 20 Jan 2022 18:41:28 +1100 (AEDT) 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 98F63B81CF8; Thu, 20 Jan 2022 07:41:25 +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 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 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: linux-s390@vger.kernel.org, Guo Ren , x86@kernel.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-mips@vger.kernel.org, sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, inux-parisc@vger.kernel.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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