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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gLOjt-0000PR-6F; Sat, 10 Nov 2018 08:35:33 +0000 Received: from mail.binarylogic.ch ([2a01:4f8:222:24c1::ff02]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gLOjp-0000No-DO for linux-riscv@lists.infradead.org; Sat, 10 Nov 2018 08:35:31 +0000 Received: from [IPv6:2001:8e0:2002:7300:11c7:1b28:a349:1c6c] (unknown [IPv6:2001:8e0:2002:7300:11c7:1b28:a349:1c6c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.binarylogic.ch (Postfix) with ESMTPSA id AD4B4DF386; Sat, 10 Nov 2018 09:35:15 +0100 (CET) Subject: Re: [PATCH] riscv: add S and U modes to ISA string To: David Abdurachmanov , palmer@sifive.com, aou@eecs.berkeley.edu, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org References: <20181110064543.12411-1-david.abdurachmanov@gmail.com> From: Patrick Staehlin Openpgp: preference=signencrypt Autocrypt: addr=me@packi.ch; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <20181110064543.12411-1-david.abdurachmanov@gmail.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181110_003529_607780_405FA7A0 X-CRM114-Status: GOOD ( 12.12 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org Message-ID: <20181110083515.a6WE9tGGAv8uCLUir7G3hPQZVG8AO29zC60tcaBUBgg@z> On 10.11.18 07:45, David Abdurachmanov wrote: > > The patch adds the missing S and U modes. This is the same patch I submitted earlier (see v2 here [1], based on Palmer's feedback). Palmer stated that the "S" extension should not be exposed to usermode. Since two people arrived at the same solution, I wonder if the supervisor mode should really be hidden from userspace, as it's about the CPU information, not about the environment the calling code is running as. [1] https://lkml.org/lkml/2018/11/10/96 Patrick _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv