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 1E90BED7BBE for ; Tue, 14 Apr 2026 11:02:38 +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-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Ot5r22s7nSjQYQUw7qrL9GBLGwSsBtcAiLp5nRWhbPk=; b=ZJ0qh42yIs2RCP S27HdshQiRUVtwr46feczxFOTusWhT55wgbcyD3yR59Qc7Y20+jxa7Nm21Mzw5/e98b45jUHewHKx utuFwlbNKGYQ/W/ya9boVGUzom5JtCO4PGdwYReRdb+kSDzqlAG6y1zZ5xJJY+9sbl9uzf1NT0Q39 rRaQbMdlnqqSnC70TrMXmJ+KNJZESpof54ZfcDiQggC8H25GXSLkIqm0USyMIYNbgEtFHd+9CKsMQ 4x9ZLnyRwfR2r4aQay7qYhXpcDHVwTe6ZSETmjUdTXL9Q1Ti62jxDIjJl1NHUorGzn3tRV0mPf/YS 09DSf5p7SZXCPRjxMqLg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCbXI-0000000HBn6-3SGt; Tue, 14 Apr 2026 11:02:28 +0000 Received: from out30-118.freemail.mail.aliyun.com ([115.124.30.118]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCbXF-0000000HBlV-1cal; Tue, 14 Apr 2026 11:02:26 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1776164541; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=rfB7a0xDWMYyCV9WZVJBD2hFjqsh3+EdQUgOYTQc0+w=; b=c4f7/coc9lv94vqE57DY5Ox9jOcQ5k6rybYTKdpl8n5Nrqsym+Wy0/r/e09FjG4WUehbSCoy7uC1ChCtFZkcg/RUfZHtktNVz5ZIc1cSJPFDjw0n/3SObEX/XdM58zeyUnPc8Dy/A7y9IQY1kHL8fKU/jfLymi08c7bDSHDfZEA= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R111e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037033178;MF=fangyu.yu@linux.alibaba.com;NM=1;PH=DS;RN=21;SR=0;TI=SMTPD_---0X11DRT3_1776164537; Received: from localhost.localdomain(mailfrom:fangyu.yu@linux.alibaba.com fp:SMTPD_---0X11DRT3_1776164537 cluster:ay36) by smtp.aliyun-inc.com; Tue, 14 Apr 2026 19:02:18 +0800 From: fangyu.yu@linux.alibaba.com To: joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, tjeznach@rivosinc.com, jgg@ziepe.ca, kevin.tian@intel.com, baolu.lu@linux.intel.com, vasant.hegde@amd.com, anup@brainfault.org, nutty.liu@hotmail.com, jgg@nvidia.com Cc: guoren@kernel.org, iommu@lists.linux.dev, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Fangyu Yu Subject: [PATCH v2 1/2] iommu/riscv: Advertise Svpbmt support to generic page table Date: Tue, 14 Apr 2026 19:02:11 +0800 Message-Id: <20260414110212.79526-2-fangyu.yu@linux.alibaba.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20260414110212.79526-1-fangyu.yu@linux.alibaba.com> References: <20260414110212.79526-1-fangyu.yu@linux.alibaba.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260414_040225_616852_2C32CE35 X-CRM114-Status: UNSURE ( 8.14 ) X-CRM114-Notice: Please train this message. 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-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Fangyu Yu The RISC-V IOMMU can optionally support Svpbmt page-based memory types in its page table format. When present,the generic page table code can use this capability to encode memory attributes (e.g. MMIO vs normal memory) in PTEs. Signed-off-by: Fangyu Yu Reviewed-by: Jason Gunthorpe Reviewed-by: Anup Patel Reviewed-by: Guo Ren Reviewed-by: Nutty Liu Reviewed-by: Kevin Tian --- drivers/iommu/riscv/iommu.c | 2 ++ include/linux/generic_pt/common.h | 4 ++++ 2 files changed, 6 insertions(+) diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c index c7d0342aa747..e53883935563 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -1194,6 +1194,8 @@ static struct iommu_domain *riscv_iommu_alloc_paging_domain(struct device *dev) cfg.common.features = BIT(PT_FEAT_SIGN_EXTEND) | BIT(PT_FEAT_FLUSH_RANGE) | BIT(PT_FEAT_RISCV_SVNAPOT_64K); + if (iommu->caps & RISCV_IOMMU_CAPABILITIES_SVPBMT) + cfg.common.features |= BIT(PT_FEAT_RISCV_SVPBMT); domain->riscvpt.iommu.nid = dev_to_node(iommu->dev); domain->domain.ops = &riscv_iommu_paging_domain_ops; diff --git a/include/linux/generic_pt/common.h b/include/linux/generic_pt/common.h index fc5d0b5edadc..2683e5b38998 100644 --- a/include/linux/generic_pt/common.h +++ b/include/linux/generic_pt/common.h @@ -188,6 +188,10 @@ enum { * Support the 64k contiguous page size following the Svnapot extension. */ PT_FEAT_RISCV_SVNAPOT_64K = PT_FEAT_FMT_START, + /* + * Support Svpbmt extension: encode page-based memory type (PBMT) in PTEs. + */ + PT_FEAT_RISCV_SVPBMT, }; -- 2.50.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv