From patchwork Tue Feb 1 15:05:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guo Ren X-Patchwork-Id: 12731885 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 A60ACC433EF for ; Tue, 1 Feb 2022 15:16:13 +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=k4cY3Zp0QzXr0ZD6Y3FonMfw/Dlko5y7r5YBt4RnW8g=; b=SWeyoh/VmHyuSv zdXDyIxLO0usgcbnMqGwwHjO2AdFTlMWmR9ZV+ZXeYX/btWfmHxNYd+DCopbcpVnRa08d4q6KlbHT KzUSsOrwztCXECDFPl0RDM81gjLqXzjfZwQ7xP13SYuZ7sDMvZ+7Iwa5S4diECi/MXttGHrKXkkmp JRFqht1KCJ6LBYlnKtQsgBGK3saY/PNuoEbKDWReRR+WftPvOTC07RjuXBk6XyufX0YD1vw9BcNBD niS4t9EXhGgg+PIAjrpZ6hwjdseOr5qqwnYf7UNB/1jGdIlDM45CZihpARVKDYGGfk52T295Jvqc1 tU/nDuR7HhIBd38MwC+w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nEut3-00Cap2-CX; Tue, 01 Feb 2022 15:16:05 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nEuka-00CWH0-OH; Tue, 01 Feb 2022 15:07:22 +0000 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 1B52C6166B; Tue, 1 Feb 2022 15:07:20 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DDDA7C340F2; Tue, 1 Feb 2022 15:07:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643728039; bh=yfEc7zgR3yCBk8Yfn7aWFLEsFQj0j+xfa9v6cbpF6Vc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XijAuT9bnUGuYuCUmoALNBnEHlhZtDhCRON0RFO4F+1ePEy+7up2ymK2Ee3ugl35d Yaj4xeZMW1Asnh8eo46/EAvXu1I0vZizvuVgx83fqUzo8RsmbK6A0q/tKOhnA0InKi 07WJFqfZsdSh5B1iKRzKqYFRDDFUKI41b/wd93Vpr0zWE29Vemj8+KymSC4bYkkMlK JB4JE4rW7JwmWjGG1DiEeSWyBj2hf6gCDG2iHi5SRLLhWJ8QP9q8kXMniqKjs6zzoA 8r9gJx1Nsox9ck34CBiPhkdvtWJWJEwJ5CP7vktOGRnnlpclGdvMSGvdk6RShWn2ie QD1vkrdlU+wZQ== 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 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 V5 13/21] riscv: compat: process: Add UXL_32 support in start_thread Date: Tue, 1 Feb 2022 23:05:37 +0800 Message-Id: <20220201150545.1512822-14-guoren@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220201150545.1512822-1-guoren@kernel.org> References: <20220201150545.1512822-1-guoren@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220201_070720_872841_B9E2395A X-CRM114-Status: GOOD ( 10.28 ) 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 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)