From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=115.124.30.124 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792489293; b=pP9hXYLevIV6f7k1uBeiMJyr5TN+mq3kNJslO2Q1tiUoroEwqP535H9odHXJbs89KcUs p6u8rN87Uxd5kAuKWbcAuNFHGoBTsWR3j5X5ebUY9/6hBXSrCGW4w1JNFekxbk8+7lm95 ei061VFTEj6Vem9Gh4qlRWYVHcJ7VKYjG0Di4/EGH6hL5STyL0eEWL4rVLks3RT2+NWll TaBCWnt77coIyEQp3eY60inAOFEMGAAe8xWH8msdN+19Juf7UodHkDd6pYKW91d8yN+qM sQHBT0Mmodqb/+h6x7ck3wBZu9DZfhk704Me0G8M1LGHjA1wjnvd4uVUDvSK0jaNRWw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792489293; h=DMARC-Filter:DKIM-Signature:X-Alimail-AntiSpam:Received:From:To:Cc: Subject:Date:Message-Id:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=crbsqOOgnhRFlp5vGQbpIuIqp1ZflBhbEHzP/8ruz5w=; b=riGFCAeQ3rup9O9oX+wd3m6rRjcHrxsPmYrr8VXZURkSByKcoGQ0XWxuZZN8r92OZjjt HxNrZOtyaBChJa/b6q8jlPt0NSZcxibGrZDYt5dpsKBAZzZKxcHKkPRGTL4/dq/05Ijyj dmcmN3n03+GYcbeVQ3ioxp7UAs5bUDCQRrumCZziSwV+y3CB13YsAnXHQmMM86Nrn5l6W uF1LFkC+3ZivLhPcshimG+W88FT8VqEtZwTmnnMTWEF5v2PoS6FShG8rsgvTOn6q/bsrP GbOWyJPL42qA+fKBSsnvgCphNpmqennB2hr53pzyQO/3jIgJgWeRBr8IljVBui/l57g== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=Qmps347e; arc=none smtp.remote-ip=115.124.30.124 Received: from out30-124.freemail.mail.aliyun.com (out30-124.freemail.mail.aliyun.com [115.124.30.124]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E615760A261C for ; Tue, 20 Oct 2026 09:41:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org E615760A261C Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=Qmps347e DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1792489285; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=crbsqOOgnhRFlp5vGQbpIuIqp1ZflBhbEHzP/8ruz5w=; b=Qmps347edMSBvEp/6fYkw6fIAqqRRPicfyFMf1vm7H491/5k7PUr2wQDMLV7DRKY/0wdxMp999uoSmRD9r8q/vMTOjSJ/T+t23aS7vNv/V6WlzTO06n4iF3gf5wLPUe95S7lxUsVj9q8DnYQfMg9jg58kUMeBdPvhHrc6oacjb8= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R491e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037026112;MF=fangyu.yu@linux.alibaba.com;NM=1;PH=DS;RN=30;SR=0;TI=SMTPD_---0XDCspU0_1792489279; Received: from localhost.localdomain(mailfrom:fangyu.yu@linux.alibaba.com fp:SMTPD_---0XDCspU0_1792489279 cluster:ay36) by smtp.aliyun-inc.com; Tue, 20 Oct 2026 17:41:22 +0800 From: fangyu.yu@linux.alibaba.com To: tomasz.jeznach@linux.dev, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, baolu.lu@linux.intel.com, jroedel@suse.de, zong.li@sifive.com, andrew.jones@linux.dev, anup@brainfault.org, jgg@nvidia.com, jgg@ziepe.ca, kevin.tian@intel.com, atish.patra@linux.dev, skhawaja@google.com, vasant.hegde@amd.com, joerg.roedel@amd.com, tanchi25@mails.ucas.ac.cn, gong.shuai@sanechips.com.cn Cc: fangyu.yu@linux.alibaba.com, guoren@kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, kvm-riscv@lists.infradead.org, Tomasz Jeznach , Nutty Liu Subject: [RFC PATCH v5 03/10] iommu/riscv: report iommu capabilities Date: Tue, 20 Oct 2026 17:40:59 +0800 Message-Id: <20261020094106.92722-4-fangyu.yu@linux.alibaba.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20261020094106.92722-1-fangyu.yu@linux.alibaba.com> References: <20261020094106.92722-1-fangyu.yu@linux.alibaba.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Tomasz Jeznach Report RISC-V IOMMU capabilities required by VFIO subsystem to enable PCIe device assignment. Signed-off-by: Tomasz Jeznach Signed-off-by: Fangyu Yu Reviewed-by: Nutty Liu --- drivers/iommu/riscv/iommu.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c index fe8e6d0f8a23..40beccedd39f 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -1444,6 +1444,16 @@ static struct iommu_group *riscv_iommu_device_group(struct device *dev) return generic_device_group(dev); } +static bool riscv_iommu_capable(struct device *dev, enum iommu_cap cap) +{ + switch (cap) { + case IOMMU_CAP_CACHE_COHERENCY: + return true; + default: + return false; + } +} + static int riscv_iommu_of_xlate(struct device *dev, const struct of_phandle_args *args) { return iommu_fwspec_add_ids(dev, args->args, 1); @@ -1505,6 +1515,7 @@ static void riscv_iommu_release_device(struct device *dev) static const struct iommu_ops riscv_iommu_ops = { .of_xlate = riscv_iommu_of_xlate, + .capable = riscv_iommu_capable, .identity_domain = &riscv_iommu_identity_domain, .blocked_domain = &riscv_iommu_blocking_domain, .release_domain = &riscv_iommu_blocking_domain, -- 2.50.1