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 E5CD5C433F5 for ; Tue, 5 Apr 2022 07:22:15 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KXfGt3DT0z3c9N for ; Tue, 5 Apr 2022 17:22:14 +1000 (AEST) 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=RJWOm7M3; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=139.178.84.217; helo=dfw.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=RJWOm7M3; dkim-atps=neutral Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) (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 4KXf6J3ngHz3bs2 for ; Tue, 5 Apr 2022 17:14:48 +1000 (AEST) 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 D349E615FE; Tue, 5 Apr 2022 07:14:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65104C34115; Tue, 5 Apr 2022 07:14:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1649142886; bh=czcF1B6lamA2QE0/pzTN2aNL2pufxwZMl+tVG9rkf3I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RJWOm7M3XXGmDosd3qRUX35iFS117oeOyg0m88AcYGHci3soFwkrSnRJkYjLyvBZl BtVhGrOs08GluxiCoLUt3DNWb2a6bdJNfZnZSUmKiTlJKpQJuHNyZtd3UqS80e90Ls aqHLZ0DaYiuEN3aqiOI6n1kQqV/eMeXkopBndYHDnS7tWb8i8xDf0+xh/5jHPpv1UE GjeZk5QASjUzv5VcVqM8QUJfjNTJGaSU4JYxZvjL1dqRqgn6z1MAnjDUyrm898lRdr QZliXcoWVqmMrdJ3VWEErBTHQc7sADJpMGtJVqrDwPQqmu0emi8jBrf9FovTGheWjw /N8GgOqJw9MDQ== From: guoren@kernel.org To: guoren@kernel.org, palmer@dabbelt.com, arnd@arndb.de, gregkh@linuxfoundation.org, hch@lst.de, nathan@kernel.org, naresh.kamboju@linaro.org Subject: [PATCH V12 13/20] riscv: compat: process: Add UXL_32 support in start_thread Date: Tue, 5 Apr 2022 15:13:07 +0800 Message-Id: <20220405071314.3225832-14-guoren@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220405071314.3225832-1-guoren@kernel.org> References: <20220405071314.3225832-1-guoren@kernel.org> 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-arch@vger.kernel.org, linux-s390@vger.kernel.org, Guo Ren , heiko@sntech.de, linux-parisc@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org, linuxppc-dev@lists.ozlabs.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. We need CONFIG _COMPAT to prevent compiling errors with rv32 defconfig. Signed-off-by: Guo Ren Signed-off-by: Guo Ren Tested-by: Heiko Stuebner Cc: Arnd Bergmann Cc: Palmer Dabbelt --- arch/riscv/kernel/process.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c index 504b496787aa..b4421c16198c 100644 --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -98,6 +98,15 @@ void start_thread(struct pt_regs *regs, unsigned long pc, } regs->epc = pc; regs->sp = sp; + +#ifdef CONFIG_64BIT + regs->status &= ~SR_UXL; + + if (is_compat_task()) + regs->status |= SR_UXL_32; + else + regs->status |= SR_UXL_64; +#endif } void flush_thread(void) -- 2.25.1