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 7DCB3CD4F26 for ; Tue, 12 May 2026 07:42:21 +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=NUkuDrE+bP5ABz8XBmrl7I4ksIpFyCg4RSZtLYrNldQ=; b=Bctpd0j3UTbaK5 +AEKvxWPUsZD0MDSvEqvFWvNvqcOFOGo/YcC4PsHZN+UYZdsym0In/iKeeps1Wwk0kqJeUzTAsLGr h8lfh660kksgfOEYpyTibgO7jWlpmTXGJAOkpA9qaPv0D3z+jlHK9tuOLTfX2Du4L5eAtV4ZKSJ2I lv16Vxw0L+F6yaYneLIVyCOPWzH7zY3Wtk3EbjTh/rjgINRLA6YpIOq0TYT9y33tzkb5FiC47cQOX i5GP9uwf5lqiCLhbORVL0iBf4bkb9MAEAPBSZEjD8HWS0aOYSFDUL1Kr6s/KYXkWuOeNNqERjRDpw 9cGbiKH7CxAoKtHM+FiQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wMhkj-0000000FxkR-08Rd; Tue, 12 May 2026 07:42:05 +0000 Received: from out30-101.freemail.mail.aliyun.com ([115.124.30.101]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wMhkf-0000000FxiJ-3k3h; Tue, 12 May 2026 07:42:03 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1778571716; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=i04ZuxIi3jt4m8VWianwNO2YFQpZ5BInIfUiKWtaoro=; b=opfCsCYITa20PfnCeeFY4R40+pjN8lEYQ90TEDK5CTD/T5uTi0/NaB9L2io10X9N8Wi/LKJNBybANI9OR1If/7yFLHrliCHsVRXLu4xSZR6daOiplNZfoeQFdFYdPRHqhfASPJzggzqDU6t+zvD6jXnC1Yfk8WeHMzeOtfO7w7A= 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-contentspam011083073210;MF=fangyu.yu@linux.alibaba.com;NM=1;PH=DS;RN=25;SR=0;TI=SMTPD_---0X2puQMt_1778571712; Received: from localhost.localdomain(mailfrom:fangyu.yu@linux.alibaba.com fp:SMTPD_---0X2puQMt_1778571712 cluster:ay36) by smtp.aliyun-inc.com; Tue, 12 May 2026 15:41:53 +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, atish.patra@linux.dev, skhawaja@google.com, jgg@nvidia.com, nutty.liu@hotmail.com Cc: guoren@kernel.org, andrew.jones@oss.qualcomm.com, kvm@vger.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 v4 1/2] iommu/riscv: Advertise Svpbmt support to generic page table Date: Tue, 12 May 2026 15:41:41 +0800 Message-Id: <20260512074142.16356-2-fangyu.yu@linux.alibaba.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20260512074142.16356-1-fangyu.yu@linux.alibaba.com> References: <20260512074142.16356-1-fangyu.yu@linux.alibaba.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260512_004202_405681_61B9EC38 X-CRM114-Status: UNSURE ( 8.53 ) 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. Reviewed-by: Jason Gunthorpe Reviewed-by: Anup Patel Reviewed-by: Guo Ren Reviewed-by: Nutty Liu Reviewed-by: Kevin Tian Signed-off-by: Fangyu Yu --- 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 a31f50bbad35..6c324f9fdc53 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -1268,6 +1268,8 @@ 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