{"id":2223076,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2223076/?format=json","project":{"id":70,"url":"http://patchwork.ozlabs.org/api/1.0/projects/70/?format=json","name":"Linux KVM RISC-V","link_name":"kvm-riscv","list_id":"kvm-riscv.lists.infradead.org","list_email":"kvm-riscv@lists.infradead.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260414110212.79526-2-fangyu.yu@linux.alibaba.com>","date":"2026-04-14T11:02:11","name":"[v2,1/2] iommu/riscv: Advertise Svpbmt support to generic page table","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"cbf3f4cf259d8ef54513a87010a9e1dfe1a66c3d","submitter":{"id":91416,"url":"http://patchwork.ozlabs.org/api/1.0/people/91416/?format=json","name":null,"email":"fangyu.yu@linux.alibaba.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/kvm-riscv/patch/20260414110212.79526-2-fangyu.yu@linux.alibaba.com/mbox/","series":[{"id":499817,"url":"http://patchwork.ozlabs.org/api/1.0/series/499817/?format=json","date":"2026-04-14T11:02:10","name":"iommu/riscv: Support Svpbmt memory types in generic_pt","version":2,"mbox":"http://patchwork.ozlabs.org/series/499817/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2223076/checks/","tags":{},"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=e4iQObOX;\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=c4f7/coc;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=temperror (SPF Temporary Error: DNS Timeout)\n smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:3::133;\n 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 4fw1b44SQxz1yDF\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: From: Fangyu Yu The RISC-V\n IOMMU\n can optionally support Svpbmt page-based memory types in its page table\n format.\n When present,the generic page table code can use this capability to encode\n memory attributes (e.g. MMIO [...]\n Content analysis details: (-17.6 points, 5.0 required)\n pts rule name description\n ---- ----------------------\n --------------------------------------------------\n 0.0 RCVD_IN_VALIDITY_SAFE_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to\n Validity was blocked. See\n https://knowledge.validity.com/hc/en-us/articles/20961730681243\n for more information.\n [115.124.30.118 listed in sa-accredit.habeas.com]\n 0.0 RCVD_IN_VALIDITY_CERTIFIED_BLOCKED RBL: ADMINISTRATOR NOTICE: The\n query to Validity was blocked. See\n https://knowledge.validity.com/hc/en-us/articles/20961730681243\n for more information.\n [115.124.30.118 listed in\n sa-trusted.bondedsender.org]\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 -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 -0.1 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_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 -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n [score: 0.0000]\n -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no\n trust\n [115.124.30.118 listed in list.dnswl.org]\n 0.0 RCVD_IN_VALIDITY_RPBL_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to\n Validity was blocked. See\n https://knowledge.validity.com/hc/en-us/articles/20961730681243\n for more information.\n [115.124.30.118 listed in\n bl.score.senderscore.com]\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","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"},"content":"From: Fangyu Yu \n\nThe RISC-V IOMMU can optionally support Svpbmt page-based memory types\nin its page table format. When present,the generic page table code can\nuse this capability to encode memory attributes (e.g. MMIO vs normal\nmemory) in PTEs.\n\nSigned-off-by: Fangyu Yu \nReviewed-by: Jason Gunthorpe \nReviewed-by: Anup Patel \nReviewed-by: Guo Ren \nReviewed-by: Nutty Liu \nReviewed-by: Kevin Tian \n---\n drivers/iommu/riscv/iommu.c | 2 ++\n include/linux/generic_pt/common.h | 4 ++++\n 2 files changed, 6 insertions(+)","diff":"diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c\nindex c7d0342aa747..e53883935563 100644\n--- a/drivers/iommu/riscv/iommu.c\n+++ b/drivers/iommu/riscv/iommu.c\n@@ -1194,6 +1194,8 @@ static struct iommu_domain *riscv_iommu_alloc_paging_domain(struct device *dev)\n \tcfg.common.features = BIT(PT_FEAT_SIGN_EXTEND) |\n \t\t\t BIT(PT_FEAT_FLUSH_RANGE) |\n \t\t\t BIT(PT_FEAT_RISCV_SVNAPOT_64K);\n+\tif (iommu->caps & RISCV_IOMMU_CAPABILITIES_SVPBMT)\n+\t\tcfg.common.features |= BIT(PT_FEAT_RISCV_SVPBMT);\n \tdomain->riscvpt.iommu.nid = dev_to_node(iommu->dev);\n \tdomain->domain.ops = &riscv_iommu_paging_domain_ops;\n \ndiff --git a/include/linux/generic_pt/common.h b/include/linux/generic_pt/common.h\nindex fc5d0b5edadc..2683e5b38998 100644\n--- a/include/linux/generic_pt/common.h\n+++ b/include/linux/generic_pt/common.h\n@@ -188,6 +188,10 @@ enum {\n \t * Support the 64k contiguous page size following the Svnapot extension.\n \t */\n \tPT_FEAT_RISCV_SVNAPOT_64K = PT_FEAT_FMT_START,\n+\t/*\n+\t * Support Svpbmt extension: encode page-based memory type (PBMT) in PTEs.\n+\t */\n+\tPT_FEAT_RISCV_SVPBMT,\n \n };\n \n","prefixes":["v2","1/2"]}