[{"id":3683472,"web_url":"http://patchwork.ozlabs.org/comment/3683472/","msgid":"<20260428133909.GH849557@ziepe.ca>","list_archive_url":null,"date":"2026-04-28T13:39:09","subject":"Re: [RFC PATCH 10/11] iommupt: Add RISC-V dirty tracking PTE ops","submitter":{"id":73018,"url":"http://patchwork.ozlabs.org/api/people/73018/","name":"Jason Gunthorpe","email":"jgg@ziepe.ca"},"content":"On Tue, Apr 28, 2026 at 09:13:58PM +0800, fangyu.yu@linux.alibaba.com wrote:\n> From: Fangyu Yu \n> \n> Implement the three dirty-tracking hooks required by the generic page\n> table framework for the RISC-V format:\n> \n> pt_entry_is_write_dirty():\n> Check the D bit (bit 7) in the PTE.\n> \n> pt_entry_make_write_clean():\n> Clear the D bit across the full contiguous range.\n> \n> pt_entry_make_write_dirty():\n> Atomically set D via try_cmpxchg64() on a single PTE.\n> \n> Signed-off-by: Fangyu Yu \n> ---\n> drivers/iommu/generic_pt/fmt/riscv.h | 43 ++++++++++++++++++++++++++++\n> 1 file changed, 43 insertions(+)\n\nThis patch should probably go earlier in your series, before adding\nthe alloc_paging flags at least.\n\nJason","headers":{"Return-Path":"\n ","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=lists.infradead.org header.i=@lists.infradead.org\n header.a=rsa-sha256 header.s=bombadil.20210309 header.b=JF3FwbtO;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n secure) header.d=ziepe.ca header.i=@ziepe.ca header.a=rsa-sha256\n header.s=google header.b=A9RydTXI;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=none (no SPF record) smtp.mailfrom=lists.infradead.org\n (client-ip=2607:7c80:54:3::133; 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The original\n message has been attached to this so you can view it or label\n similar future email. If you have any questions, see\n the administrator of that system for details.\n Content preview: On Tue, Apr 28, 2026 at 09:13:58PM +0800,\n fangyu.yu@linux.alibaba.com\n wrote: > From: Fangyu Yu > > Implement the\n three dirty-tracking hooks required by the generic page > [...]\n Content analysis details: (-2.1 points, 5.0 required)\n pts rule name description\n ---- ----------------------\n --------------------------------------------------\n -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no\n trust\n [2607:f8b0:4864:20:0:0:0:733 listed in]\n [list.dnswl.org]\n 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record\n -0.0 SPF_PASS SPF: sender matches SPF record\n -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from\n envelope-from domain\n 0.1 DKIM_SIGNED Message has a DKIM or DK signature,\n not necessarily valid\n -0.1 DKIM_VALID Message has at least one valid DKIM or DK\n signature\n -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from\n author's\n domain\n -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n [score: 0.0000]","X-BeenThere":"kvm-riscv@lists.infradead.org","X-Mailman-Version":"2.1.34","Precedence":"list","List-Id":"","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Sender":"\"kvm-riscv\" ","Errors-To":"kvm-riscv-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org"}},{"id":3683771,"web_url":"http://patchwork.ozlabs.org/comment/3683771/","msgid":"<20260429015227.67909-1-fangyu.yu@linux.alibaba.com>","list_archive_url":null,"date":"2026-04-29T01:52:27","subject":"Re: Re: [RFC PATCH 10/11] iommupt: Add RISC-V dirty tracking PTE ops ","submitter":{"id":91416,"url":"http://patchwork.ozlabs.org/api/people/91416/","name":null,"email":"fangyu.yu@linux.alibaba.com"},"content":">> From: Fangyu Yu \n>> \n>> Implement the three dirty-tracking hooks required by the generic page\n>> table framework for the RISC-V format:\n>> \n>> pt_entry_is_write_dirty():\n>> Check the D bit (bit 7) in the PTE.\n>> \n>> pt_entry_make_write_clean():\n>> Clear the D bit across the full contiguous range.\n>> \n>> pt_entry_make_write_dirty():\n>> Atomically set D via try_cmpxchg64() on a single PTE.\n>> \n>> Signed-off-by: Fangyu Yu \n>> ---\n>> drivers/iommu/generic_pt/fmt/riscv.h | 43 ++++++++++++++++++++++++++++\n>> 1 file changed, 43 insertions(+)\n>\n>This patch should probably go earlier in your series, before adding\n>the alloc_paging flags at least.\n>\n\nAgreed. I will reorder the series and place this patch earlier.\n\nThanks,\nFangyu\n\n>Jason","headers":{"Return-Path":"\n ","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n secure) header.d=lists.infradead.org header.i=@lists.infradead.org\n header.a=rsa-sha256 header.s=bombadil.20210309 header.b=RQMP94Cz;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com\n header.a=rsa-sha256 header.s=default header.b=Ai99fKM1;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=none (no SPF record) smtp.mailfrom=lists.infradead.org\n (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org;\n envelope-from=kvm-riscv-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from bombadil.infradead.org (bombadil.infradead.org\n [IPv6:2607:7c80:54:3::133])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g50gG538hz1xvV\n\tfor ; Wed, 29 Apr 2026 11:52:42 +1000 (AEST)","from localhost ([::1] helo=bombadil.infradead.org)\n\tby bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux))\n\tid 1wHu6S-00000002kY3-3YuP;\n\tWed, 29 Apr 2026 01:52:40 +0000","from out30-100.freemail.mail.aliyun.com ([115.124.30.100])\n\tby bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux))\n\tid 1wHu6Q-00000002kXb-2Fyt;\n\tWed, 29 Apr 2026 01:52:39 +0000","from localhost.localdomain(mailfrom:fangyu.yu@linux.alibaba.com\n fp:SMTPD_---0X1vlR.H_1777427551 cluster:ay36)\n by smtp.aliyun-inc.com;\n Wed, 29 Apr 2026 09:52:33 +0800"],"DKIM-Signature":["v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=lists.infradead.org; s=bombadil.20210309; h=Sender:\n\tContent-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post:\n\tList-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:\n\tMessage-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:\n\tResent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:\n\tList-Owner; bh=1P4j0GHEqhwXaxUqJ4VY1AmqYAG/dakLjnJZiu3wJlc=; b=RQMP94Cz61uF4I\n\tAC2wD6d2/Qr0EYkwOFe0xBdn9OJ5Ns21o8OSgJSndd1Uy79mZh9yH72V8mmpzG50PmPE3CRz6U7/+\n\tfYpvaQ1Fhhiwt2MNdOjGQq9wF9E98qrVKLlJcWKIOSRh+wareWsq7Oaorsh51Xy+g+1lkZFvJ4DJY\n\trci6csXB35SkLwf8Dkj/k4c4++Hp6ojsL/XnCfmv/eFGFqfpBDyjZhZSOAMtdXEqRFyjqZ7aH/leA\n\tjNp1GrIxMFFX6fp8Z4YX+plT8v8/kbo18jX7x/i0o9CAaToli3MrmIGgPml+L4e/BPMr0h2nF7TR2\n\tgsTi3rAumneUsDxdSvbA==;","v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=linux.alibaba.com; s=default;\n\tt=1777427555; h=From:To:Subject:Date:Message-Id:MIME-Version;\n\tbh=M1CcrdQtHn2gSvCSo6JX/03PiEKIGjscS1LiRTMKJVg=;\n\tb=Ai99fKM1fPPwzo0w+6ADN4/4628so65cAD343BfNbsVYirz4p60x5dx/hIUTJcpTugTbFRqoj/22Pid6k//HPYEfpOpTmPXB43NutKyY+8mruXk0YhzK2xGQNpLDSAyV1qcKwhYx4X+YY/dAqcaYUZjMTol5wk3lGh6GeVJOKLI="],"X-Alimail-AntiSpam":"\n AC=PASS;BC=-1|-1;BR=01201311R121e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033032089153;MF=fangyu.yu@linux.alibaba.com;NM=1;PH=DS;RN=22;SR=0;TI=SMTPD_---0X1vlR.H_1777427551;","From":"fangyu.yu@linux.alibaba.com","To":"jgg@ziepe.ca","Cc":"alex@ghiti.fr,\n\tanup@brainfault.org,\n\taou@eecs.berkeley.edu,\n\tatish.patra@linux.dev,\n\tbaolu.lu@linux.intel.com,\n\tfangyu.yu@linux.alibaba.com,\n\tguoren@kernel.org,\n\tiommu@lists.linux.dev,\n\tjoro@8bytes.org,\n\tkevin.tian@intel.com,\n\tkvm-riscv@lists.infradead.org,\n\tkvm@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org,\n\tlinux-riscv@lists.infradead.org,\n\tpalmer@dabbelt.com,\n\tpjw@kernel.org,\n\trobin.murphy@arm.com,\n\tskhawaja@google.com,\n\ttjeznach@rivosinc.com,\n\tvasant.hegde@amd.com,\n\twill@kernel.org","Subject":"Re: Re: [RFC PATCH 10/11] iommupt: Add RISC-V dirty tracking PTE ops ","Date":"Wed, 29 Apr 2026 09:52:27 +0800","Message-Id":"<20260429015227.67909-1-fangyu.yu@linux.alibaba.com>","X-Mailer":"git-send-email 2.39.3 (Apple Git-146)","In-Reply-To":"<20260428133909.GH849557@ziepe.ca>","References":"<20260428133909.GH849557@ziepe.ca>","MIME-Version":"1.0","X-CRM114-Version":"20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ","X-CRM114-CacheID":"sfid-20260428_185238_958723_02DC4DD3 ","X-CRM114-Status":"UNSURE ( 6.47 )","X-CRM114-Notice":"Please train this message.","X-Spam-Score":"-17.6 (-----------------)","X-Spam-Report":"Spam detection software,\n running on the system \"bombadil.infradead.org\",\n has NOT identified this incoming email as spam. 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If you have any questions, see\n the administrator of that system for details.\n Content preview: >> From: Fangyu Yu >> >>\n Implement\n the three dirty-tracking hooks required by the generic page >> table\n framework\n for the RISC-V format: >> >> pt_entry_is_write_dirty(): [...]\n Content analysis details: (-17.6 points, 5.0 required)\n pts rule name description\n ---- ----------------------\n --------------------------------------------------\n -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no\n trust\n [115.124.30.100 listed in list.dnswl.org]\n -7.5 USER_IN_DEF_SPF_WL From: address is in the default SPF welcome-list\n 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record\n -0.0 SPF_PASS SPF: sender matches SPF record\n -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM welcome-list\n -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from\n envelope-from domain\n 0.1 DKIM_SIGNED Message has a DKIM or DK signature,\n not necessarily valid\n -0.1 DKIM_VALID Message has at least one valid DKIM or DK\n signature\n -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from\n author's\n domain\n -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n [score: 0.0000]\n -0.5 ENV_AND_HDR_SPF_MATCH Env and Hdr From used in default SPF WL Match\n 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay\n lines","X-BeenThere":"kvm-riscv@lists.infradead.org","X-Mailman-Version":"2.1.34","Precedence":"list","List-Id":"","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Sender":"\"kvm-riscv\" ","Errors-To":"kvm-riscv-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org"}}]