[{"id":3683473,"web_url":"http://patchwork.ozlabs.org/comment/3683473/","msgid":"<20260428133942.GI849557@ziepe.ca>","list_archive_url":null,"date":"2026-04-28T13:39:42","subject":"Re: [RFC PATCH 11/11] iommu/riscv: support nested iommu for getting\n iommu hardware information","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 09:13:59PM +0800, fangyu.yu@linux.alibaba.com wrote:\n> From: Zong Li \n> \n> This patch implements .hw_info operation and the related data\n> structures for passing the IOMMU hardware capabilities for iommufd.\n> \n> Signed-off-by: Zong Li \n> Reviewed-by: Jason Gunthorpe \n> Signed-off-by: Fangyu Yu \n> ---\n> drivers/iommu/riscv/iommu.c | 19 +++++++++++++++++++\n> include/uapi/linux/iommufd.h | 18 ++++++++++++++++++\n> 2 files changed, 37 insertions(+)\n\nThis has nothing to do with dirty tracking. It should go with a series\nintroducing viommu.\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=k+77bo4n;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n secure) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256\n header.s=desiato.20200630 header.b=JTVs13kK;\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=jUYmHBTX;\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 4g4hPf6zkDz1xrS\n\tfor ; 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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 09:13:59PM +0800,\n fangyu.yu@linux.alibaba.com\n wrote: > From: Zong Li > > This patch implements\n .hw_info\n operation and the related data > structures for pas [...]\n Content analysis details: (-0.2 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:f29 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_AU Message has a valid DKIM or DK signature from\n author's\n domain\n -0.1 DKIM_VALID Message has at least one valid DKIM or DK\n signature\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","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":3683784,"web_url":"http://patchwork.ozlabs.org/comment/3683784/","msgid":"<20260429023722.79615-1-fangyu.yu@linux.alibaba.com>","list_archive_url":null,"date":"2026-04-29T02:37:22","subject":"Re: Re: [RFC PATCH 11/11] iommu/riscv: support nested iommu for\n getting iommu hardware information ","submitter":{"id":91416,"url":"http://patchwork.ozlabs.org/api/people/91416/","name":null,"email":"fangyu.yu@linux.alibaba.com"},"content":">> From: Zong Li \n>> \n>> This patch implements .hw_info operation and the related data\n>> structures for passing the IOMMU hardware capabilities for iommufd.\n>> \n>> Signed-off-by: Zong Li \n>> Reviewed-by: Jason Gunthorpe \n>> Signed-off-by: Fangyu Yu \n>> ---\n>> drivers/iommu/riscv/iommu.c | 19 +++++++++++++++++++\n>> include/uapi/linux/iommufd.h | 18 ++++++++++++++++++\n>> 2 files changed, 37 insertions(+)\n>\n>This has nothing to do with dirty tracking. It should go with a series\n>introducing viommu.\n>\n\nThanks for pointing that out.\n\nI added the .hw_info-related patch because, during passthrough testing with a\nVM, I observed that QEMU calls iommufd_get_hw_info, so I initially thought it\nwas required. However, it appears that the .hw_info implementation is not\nnecessary for this series. I will remove the .hw_info-related patch from my\ndirty-tracking series in a follow-up revision.\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=Uz5kAOf+;\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=xnyTct9r;\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 4g51gQ2tl0z1xvV\n\tfor ; Wed, 29 Apr 2026 12:37:46 +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 1wHunz-00000002nIm-3YT4;\n\tWed, 29 Apr 2026 02:37:39 +0000","from out30-130.freemail.mail.aliyun.com ([115.124.30.130])\n\tby bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux))\n\tid 1wHunx-00000002nIN-28cL;\n\tWed, 29 Apr 2026 02:37:39 +0000","from localhost.localdomain(mailfrom:fangyu.yu@linux.alibaba.com\n fp:SMTPD_---0X1vzVVG_1777430247 cluster:ay36)\n by smtp.aliyun-inc.com;\n Wed, 29 Apr 2026 10:37:29 +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=fEXBlI6BnYa50ejqXKoM+YxVMMwsv+P+RB68hwP0l+Y=; b=Uz5kAOf+3Jgg7T\n\tNfytN0rrHyac+YGVScMy7fuUMoVeC4CTPAWQRP8XWMc1xW7kkuEG4X7x72nWHN06IpcsPfsLBg0U7\n\tuzA1a3Cii3Pi/VbXWX+VoU7135t7fdrpMLgiZevJA0O2ECNyx5Hdzyi2l8Sc9eQFiMHqOHi964vk9\n\tWT0Iwvj1ERjErA1yQT4HCTSBFGVfs3rUbrC0JPiHuz84W6H+tQmKYCnQ3PPsIrPw9l2hayPfVaDCR\n\tf0whAFNpZFugV3utWJmZiwEACzCg5pMtt40cIOvmAPuR6o4SC2txzFrMw+1Pc5lMfKbh9iFTzHpte\n\t5fXGUzgv7ceqYooTB+SA==;","v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=linux.alibaba.com; s=default;\n\tt=1777430253; h=From:To:Subject:Date:Message-Id:MIME-Version;\n\tbh=9vgeJGi4fIz8c1PAExsDJNL3htFpFy8K6PCAfkBpC84=;\n\tb=xnyTct9rn8qm5vgW3260+7nlnKASyFZ+lQ+3Eq3PiEA56C11peSDgL/tf2JB9m/78/dxFMTrK06HUabhA45xrvfYD3avZkiusd4aaz3PJM6HS8QpCj2cyiSULvFZ4ylP/nxrlcjYjTXyuDFVkedKz+L5haDulWE8aqKRp8z5srM="],"X-Alimail-AntiSpam":"\n AC=PASS;BC=-1|-1;BR=01201311R131e4;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=23;SR=0;TI=SMTPD_---0X1vzVVG_1777430247;","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,\n\tzong.li@sifive.com","Subject":"Re: Re: [RFC PATCH 11/11] iommu/riscv: support nested iommu for\n getting iommu hardware information ","Date":"Wed, 29 Apr 2026 10:37:22 +0800","Message-Id":"<20260429023722.79615-1-fangyu.yu@linux.alibaba.com>","X-Mailer":"git-send-email 2.39.3 (Apple Git-146)","In-Reply-To":"<20260428133942.GI849557@ziepe.ca>","References":"<20260428133942.GI849557@ziepe.ca>","MIME-Version":"1.0","X-CRM114-Version":"20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ","X-CRM114-CacheID":"sfid-20260428_193738_061041_3040E29B ","X-CRM114-Status":"UNSURE ( 9.66 )","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. 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: >> From: Zong Li >> >> This patch\n implements\n .hw_info operation and the related data >> structures for passing the\n IOMMU\n hardware capabilities for iommufd. >> >> Signed-off-by: Zo [...]\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 [115.124.30.130 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 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay\n lines\n -0.5 ENV_AND_HDR_SPF_MATCH Env and Hdr From used in default SPF WL Match\n 0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2)\n [115.124.30.130 listed in wl.mailspike.net]","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"}}]