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 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 9105EC4345F for ; Fri, 3 May 2024 12:20:19 +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-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=LpEbwSR3g8XfjiB+6l1h61CamN3rwa2589KYOAKo/Mg=; b=JWo7fZrGmCwEk2 ePqDdhxGxIwUMi7yygpITH5L6nnx29W6Pdq9OroB0cMHA1aBLJB1kOZxInJgyO94GY5Cr1mBeCjqz YgJDTdImIGTYjTqHdiiw/seCcUmsm9iuvQIK5SGDmC3Ojlk7XaVMwpt7gRiujFcLxvmRHCaq5oK/I l12rLnKO2xmEGie7QU1pe/0YGZoCxymVOdUJzXWwHYjK+6SPf+LRjLuEJnH1viwORd4wkockn7cti nf/Xi+1MeFwDHAh22yWWCEu/ROPuB/NNDv/A+evZGLIzSsIn7wP80VgJvJwXx5fp4BrsUY25QKSm8 zOvpu0TBtCOErSX7i6YA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s2rte-0000000GP1F-0OfS; Fri, 03 May 2024 12:20:14 +0000 Received: from imap4.hz.codethink.co.uk ([188.40.203.114]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s2rta-0000000GOxF-474c for linux-riscv@lists.infradead.org; Fri, 03 May 2024 12:20:12 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=codethink.co.uk; s=imap4-20230908; h=Sender:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=nrKtj6pAhuqpN++t5oFkqusThl46U1xzi7qk6r4wSuM=; b=S9xoFgyUSJE2p/2JBqE0YpGBpJ QwckRrBl9cBYy++fD+wFfHSF0GCtxPDsRg4xnpytbcvoe516loFGg7raYIKeXvDuM1EQgUw3qrqe8 EfWtriskAQF3S74PnEmsfAxleewBbxj8Iz7NbuMysAaplmm8VnYDJYJNBiLp0hqsb1oJSdyY0XQWg jVlqTxSh6An7dE8fpUpMRcaR6r5Lb9TMNhpZt1Z2mXW/nTGyA1jaRgw9ivWAhFudkbe7nPQ4sZFa1 ToiFSN9VqVjPIW0W/y1HxEgPmICmwLXTUznruhbxW+cjpx0o6iDMJPz9qBdKAISACcXcVsWqGPG1L We43Catw==; Received: from [167.98.27.226] (helo=[10.35.6.244]) by imap4.hz.codethink.co.uk with esmtpsa (Exim 4.94.2 #2 (Debian)) id 1s2rtE-004KaJ-2W; Fri, 03 May 2024 13:19:48 +0100 Message-ID: <4bc238eb-410b-46b1-98e1-4aaa35e34404@codethink.co.uk> Date: Fri, 3 May 2024 13:19:47 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] riscv: uaccess: Allow the last potential unrolled copy Content-Language: en-GB To: Alexandre Ghiti , Xiao Wang , paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu Cc: jerry.shih@sifive.com, nick.knight@sifive.com, ajones@ventanamicro.com, bjorn@rivosinc.com, andy.chiu@sifive.com, viro@zeniv.linux.org.uk, cleger@rivosinc.com, alexghiti@rivosinc.com, haicheng.li@intel.com, akira.tsukamoto@gmail.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org References: <20240313103334.4036554-1-xiao.w.wang@intel.com> <7ebc5b28-7115-494f-a607-e46c71214cce@ghiti.fr> From: Ben Dooks Organization: Codethink Limited. In-Reply-To: <7ebc5b28-7115-494f-a607-e46c71214cce@ghiti.fr> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240503_052011_209557_D3B0A54A X-CRM114-Status: GOOD ( 15.97 ) 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: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org T24gMDMvMDUvMjAyNCAxMzoxNiwgQWxleGFuZHJlIEdoaXRpIHdyb3RlOgo+IEhpIFhpYW8sCj4g Cj4gT24gMTMvMDMvMjAyNCAxMTozMywgWGlhbyBXYW5nIHdyb3RlOgo+PiBXaGVuIHRoZSBkc3Qg YnVmZmVyIHBvaW50ZXIgcG9pbnRzIHRvIHRoZSBsYXN0IGFjY2Vzc2libGUgYWxpZ25lZCAKPj4g YWRkciwgd2UKPj4gY291bGQgc3RpbGwgcnVuIGFub3RoZXIgaXRlcmF0aW9uIG9mIHVucm9sbGVk IGNvcHkuCj4+Cj4+IFNpZ25lZC1vZmYtYnk6IFhpYW8gV2FuZyA8eGlhby53LndhbmdAaW50ZWwu Y29tPgo+PiAtLS0KPj4gwqAgYXJjaC9yaXNjdi9saWIvdWFjY2Vzcy5TIHwgMiArLQo+PiDCoCAx IGZpbGUgY2hhbmdlZCwgMSBpbnNlcnRpb24oKyksIDEgZGVsZXRpb24oLSkKPj4KPj4gZGlmZiAt LWdpdCBhL2FyY2gvcmlzY3YvbGliL3VhY2Nlc3MuUyBiL2FyY2gvcmlzY3YvbGliL3VhY2Nlc3Mu Uwo+PiBpbmRleCAyZTY2NWY4ZjhmY2MuLjEzOTlkNzk3ZDgxYiAxMDA2NDQKPj4gLS0tIGEvYXJj aC9yaXNjdi9saWIvdWFjY2Vzcy5TCj4+ICsrKyBiL2FyY2gvcmlzY3YvbGliL3VhY2Nlc3MuUwo+ PiBAQCAtMTAzLDcgKzEwMyw3IEBAIFNZTV9GVU5DX1NUQVJUKGZhbGxiYWNrX3NjYWxhcl91c2Vy Y29weSkKPj4gwqDCoMKgwqDCoCBmaXh1cCBSRUdfU8KgwqAgdDQswqAgNypTWlJFRyhhMCksIDEw Zgo+PiDCoMKgwqDCoMKgIGFkZGnCoMKgwqAgYTAsIGEwLCA4KlNaUkVHCj4+IMKgwqDCoMKgwqAg YWRkacKgwqDCoCBhMSwgYTEsIDgqU1pSRUcKPj4gLcKgwqDCoCBibHR1wqDCoMKgIGEwLCB0MCwg MmIKPj4gK8KgwqDCoCBibGV1wqDCoMKgIGEwLCB0MCwgMmIKPj4gwqDCoMKgwqDCoCBhZGRpwqDC oMKgIHQwLCB0MCwgOCpTWlJFRyAvKiByZXZlcnQgdG8gb3JpZ2luYWwgdmFsdWUgKi8KPj4gwqDC oMKgwqDCoCBqwqDCoMKgIC5MYnl0ZV9jb3B5X3RhaWwKPiAKPiAKPiBJIGFncmVlIGl0IGlzIHN0 aWxsIHNhZmUgdG8gY29udGludWUgZm9yIGFub3RoZXIgd29yZF9jb3B5IGhlcmUuCj4gCj4gUmV2 aWV3ZWQtYnk6IEFsZXhhbmRyZSBHaGl0aSA8YWxleGdoaXRpQHJpdm9zaW5jLmNvbT4KCk91dCBv ZiBpbnRlcmVzdCwgaGFzIGFueW9uZSBjaGVja2VkIGlmIGNhdXNpbmcgYSBzY2hlZHVsZSBldmVu dCBkdXJpbmcKdGhpcyBjb2RlIGJyZWFrcyBsaWtlIHRoZSBsYXN0IHRpbWUgd2UgaGFkIGlzc3Vl cyB3aXRoIHRoZSB1cHN0cmVhbQp0ZXN0aW5nPwoKSSBkaWQgcHJvcG9zZSBzYXZpbmcgdGhlIHN0 YXRlIG9mIHRoZSB1c2VyLWFjY2VzcyBmbGFnIGluIHRoZSB0YXNrCnN0cnVjdCBidXQgd2UgbW9z dGx5IHNvbHZlZCBpdCBieSBtYWtpbmcgc2xlZXBpbmcgZnVuY3Rpb25zIHN0YXkKYXdheSBmcm9t IHRoZSBhZGRyZXNzIGNhbGN1bGF0aW9uLiBUaGlzIG9mIGNvdXJzZSBtYXkgaGF2ZSBiZWVuIGRv bmUKYWxyZWFkeSBvciBuZWVkIHRvIGJlIGRvbmUgaWYgdGhyZWUncyBsb25nIGFyZWFzIHdoZXJl IHRoZSB1c2VyLWFjY2VzcwpmbGFncyBjYW4gYmUgZGlzYWJsZWQgKGdlbmVyYWxseSBvbmx5IGEg ZmV3IGRyaXZlcnMgZGlkIHRoaXMsIHNvIHdlCm1heSBub3QgaGF2ZSBjb21lIGFjcm9zcyB0aGUg cHJvYmxlbSkKCi0tIApCZW4gRG9va3MJCQkJaHR0cDovL3d3dy5jb2RldGhpbmsuY28udWsvClNl bmlvciBFbmdpbmVlcgkJCQlDb2RldGhpbmsgLSBQcm92aWRpbmcgR2VuaXVzCgpodHRwczovL3d3 dy5jb2RldGhpbmsuY28udWsvcHJpdmFjeS5odG1sCgoKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KbGludXgtcmlzY3YgbWFpbGluZyBsaXN0CmxpbnV4LXJp c2N2QGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1h bi9saXN0aW5mby9saW51eC1yaXNjdgo=