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 EAB7FCAC5A5 for ; Sat, 20 Sep 2025 20:39:16 +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=wXZF+Pxkclv2+7fjjT8MZxmC7lrDx6P6/WMOdHE0x1I=; b=yb2btPiiy9UfoF 9JVnGvjnmABXJLJ2ACDJqSRNSCvU3oYJ7EXVDh1Fl9youE1YGhA+duhFfMbyjlSaVbT3TX4XApvkb ilDJXMg5PZFvoVbje56wMG0E5bxsHFYshEHZChqtngfPkbbeFsJa5sknOger37x1dYTQpRXHj8w9f KtLAm7Sne8KlNh2r+2bN2LJXWGe30Tr5ClQ2DSES0a/ljmnzpgJWpkowfBRlM9ObYCg4h9V75gHnn 7v6iF6yWnx9NUJ5zoTbEhvoEK5ps+S/0tYl0wZxjRyastSlqXydXkLrNa01IDw2tG2duev9EmzFJr Ff1Cpx0aZcnfdhQTfXVQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v04MW-00000005tk0-2Ig3; Sat, 20 Sep 2025 20:39:16 +0000 Received: from mail-il1-x132.google.com ([2607:f8b0:4864:20::132]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v04MQ-00000005tXw-1yIg for kvm-riscv@lists.infradead.org; Sat, 20 Sep 2025 20:39:12 +0000 Received: by mail-il1-x132.google.com with SMTP id e9e14a558f8ab-4256f0fac67so5297885ab.2 for ; Sat, 20 Sep 2025 13:39:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1758400750; x=1759005550; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=tiJg8ON0boDhCQorG+j+Xw5gw12MCBbaI74+jnmrMFk=; b=DihRN6J7Do4hIOOlELuEGv12GkELBadJCuznenHaXFw37qQfxoXMCL58YX3qEIVzVa hsa16WpMmJQGgr8rwa4CUghYkq3E4nqpBh9cnC8Tl1aUpYzp6TYf6soXVp9u6bO/et9+ t/BiZr+Y6PgrGJaWOXotBYEinfB9ExbXVXSa3mXlHl588UoxEnUt/oIK3btqEotp0iXa eyQ6KxpGZZj7ZZsLgMQB1s9inXhwHFcrxA3voOI5aVqGq1ka5/bqhMMY/ZaN8k7/YI0e 08c9UPVQaaYf0ugPg6fSPB+JrLTlbLLigvbCgUXXJYNBHwh7MvhGtnn0erXq+rmSBl/v EvTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758400750; x=1759005550; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=tiJg8ON0boDhCQorG+j+Xw5gw12MCBbaI74+jnmrMFk=; b=iP6sGgzsNVv4ldq1/jss7Y+xLKzrws014ZFmlvKBLpUmvDPzeQPDkKovecmEhZoRo0 skSL49mAIel82+qQ6zbrhZqQa8oRYDTWxVXECP2zZlJ+sLvZsUb2NuAvffjs+AnBztlO GQHl5yxAkYf206O6+xpgNFes/JL1Qw9pxgT5Dl7shl0UalyhWcIyxKVTGRKxz3GzWdOk dT4dV+TJ8ue6KLbq3bCF0vwxAdPiQEK90jtRAGyoWyO6biUTIDHE/psCHw8XS9kYWSZ/ 32XvvWanepTZDoehwbFaOeoJpjWO58ki0qMTTwPBVpEFfzkQg1xqxALvPlWy/PLP0CPW 1FxA== X-Forwarded-Encrypted: i=1; AJvYcCX69uhNMBDSCte2y7SNTUb+qw1kzzFJVgM/7PJFedje9sPUBcXIGl+oaE+k1rCoZkyA5lqvyGG8w4Q=@lists.infradead.org X-Gm-Message-State: AOJu0YxFuylkvqe0D/fPAApHddccOI0aAaELA97IkfN2O2VBXXpo/rES MCxnp0C+usfChCTG08ipM54X13kCRF2rLzP6zzzb0cmwRvGIbI355sCB1ePMlQyU0cg= X-Gm-Gg: ASbGnct7lY9Qpy8edHLfA61NshnhU59wCPU5Mb6oI/0ascUBPuaQa8/2CV6fcOIGTUW JdD/b9xuEiztYgwagBpUxUdtYEUUZoQULwShNc4nZfDSP3fXE/NUBfAfzqWuedHjpF15PjKBlVY capgoiiC4kh6nXquZ3sZanLxkgUwHFFAmyFkDKA6YZ/UVS8CwsMMxFQGQ24grepHNhVlbf3Vekn k3qa3fOk6172VabXnzoCgBkHl2lWTCkG6+ZSxDJAtUJumqIQkNoEt7+ecI/4EEp9hxsjeauXz/3 PZ93NIevKMaMXiYmmD8Dfo/FI02VzUzYtog7ph6BFF/fksNdlSL5AYmGkTQov/Qvsghl74gbLOA BKYQjuA7ECYw2rFA7yWiX4OjF X-Google-Smtp-Source: AGHT+IFsmriwC7sM1H4SekuoxTk4S0bUk4TUqEUdLP6mEpfm4K0KojSVb0TkIY/Q7lu1c7nixhkmrw== X-Received: by 2002:a92:c24c:0:b0:40c:410d:dc35 with SMTP id e9e14a558f8ab-424819709a7mr96072735ab.21.1758400749673; Sat, 20 Sep 2025 13:39:09 -0700 (PDT) Received: from localhost ([140.82.166.162]) by smtp.gmail.com with ESMTPSA id e9e14a558f8ab-4248a975078sm17095365ab.17.2025.09.20.13.39.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 20 Sep 2025 13:39:09 -0700 (PDT) From: Andrew Jones To: iommu@lists.linux.dev, kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: jgg@nvidia.com, zong.li@sifive.com, tjeznach@rivosinc.com, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, anup@brainfault.org, atish.patra@linux.dev, tglx@linutronix.de, alex.williamson@redhat.com, paul.walmsley@sifive.com, palmer@dabbelt.com, alex@ghiti.fr Subject: [RFC PATCH v2 13/18] iommu/riscv: report iommu capabilities Date: Sat, 20 Sep 2025 15:39:03 -0500 Message-ID: <20250920203851.2205115-33-ajones@ventanamicro.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250920203851.2205115-20-ajones@ventanamicro.com> References: <20250920203851.2205115-20-ajones@ventanamicro.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250920_133910_541862_9EE5F10D X-CRM114-Status: UNSURE ( 9.70 ) X-CRM114-Notice: Please train this message. X-BeenThere: kvm-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: "kvm-riscv" Errors-To: kvm-riscv-bounces+kvm-riscv=archiver.kernel.org@lists.infradead.org From: Tomasz Jeznach Report RISC-V IOMMU capability required by the VFIO subsystem to enable PCIe device assignment. Signed-off-by: Tomasz Jeznach Signed-off-by: Andrew Jones --- drivers/iommu/riscv/iommu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c index 02f38aa0b231..5a0dd99f07d0 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -1452,6 +1452,17 @@ 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: + /* The RISC-V IOMMU is always DMA cache coherent. */ + 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); @@ -1531,6 +1542,7 @@ 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, -- 2.49.0 -- kvm-riscv mailing list kvm-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kvm-riscv From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f176.google.com (mail-il1-f176.google.com [209.85.166.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9E1372E2296 for ; Sat, 20 Sep 2025 20:39:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758400752; cv=none; b=Mzmm6ZADLMkJWaZSUcCRcO0UkxaW3ZX7J5F9KXV2L1qR59UycUWv21mAQY4FesZUwa9yTzrwFwF/niVeW332Bp9/808n0cuT88BPAopbal0AoeD4gwrulxnlV9r81Hur52s9dUWfzsi3QQ8NB1qwPapgVNbRaPLf0HPTpvp4AJk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758400752; c=relaxed/simple; bh=Hg34JU7YAR3ovVopvNeMy/UYrJOofzU+xpM0EejLzeI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QImxCT73ZVaqqPS6mKDknvPGEPxa57shrxwQVa7s19wa3tDxvYKYfx+Hv8hFy1Oe2kZEKYyVY3RgoH31a7CjyEqRS4Uyt2sYULwncOCMRf7biZBhb9sN7LzdtfnAoCJwSLoWzvEci5pcBG1UowLGhz4DFPbGoBvu9QXfFL0Bcds= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com; spf=pass smtp.mailfrom=ventanamicro.com; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b=oZExTUWr; arc=none smtp.client-ip=209.85.166.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b="oZExTUWr" Received: by mail-il1-f176.google.com with SMTP id e9e14a558f8ab-4256f0fac67so5297875ab.2 for ; Sat, 20 Sep 2025 13:39:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1758400750; x=1759005550; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=tiJg8ON0boDhCQorG+j+Xw5gw12MCBbaI74+jnmrMFk=; b=oZExTUWrER6X/OgXrV7rlHfqqm468bDvvF0DIk1x9k77GCBQdVwSxk7ox+TIBVHnwY Dx57sU1muoIj86ADKODQB29H8gYgqUgkKsb60coYVAnUKxhbUhP3h9JSbbblphlE5MXD JNvsRqAJWlhoT5vQnT4F1rdq9jgiwHI3xHGkfRVDl8oahLIUCM/T0TGrdrvUL+ViOykv t23gOLG/g8ZCP25/+j7WpUchyyIwf8bau8tpTxYgxIYNFbIkawCsP+aWP9Zqzy7hpej+ ZxxOkInWm/0R0PAvfYgUByS1RJt5cJ9Fs181Qpq1Tbpif2o3+J3NCtXEo9q14/+pG6OL QXcg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758400750; x=1759005550; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=tiJg8ON0boDhCQorG+j+Xw5gw12MCBbaI74+jnmrMFk=; b=XzjCC49OiqnfJ8n94weJ08CuAXkuyi7kAh6nfDapXNLt0dtz96fthuiDFRI6+Ompoz kBmplbYcz/IjCrUdBAzuVEAfijhD9zutFZelzkkrI4tucu0ICE9xi2Vsca3YlmBz6Iyz ea7Qv3hp7YrRl9mYgPImsruo3j9Hb0tZjP1kr5NDVmpaZGfC0q+1CWoujFoR4mwQPbp5 dZXD7UzUran0ueW6qkBM1Oo9g7TPXjQK/CmXo1V63IMomXyGAqeuAUJU1oWcQuiOvSa9 cp0891x0WRzv3nTTUjMgkar3mma30UcQtchz1cjEO1o1Jb6AsBgn+1V3mBL0F2HV9gk/ rPsA== X-Forwarded-Encrypted: i=1; AJvYcCX/REEuLnOyLWhgX4pcu6S83WBA0IzZGjbfvZAGKHmuuG95au119qTb6jmr5+XHZUAiyAE=@vger.kernel.org X-Gm-Message-State: AOJu0YywkdsJ+O8TbFR1Q5rDKT+PU1scO/ljvx6AcuJZZUmpqw+2Io4C 3/hCKJHHAZO3Ka4lbJZIA44rH+QTZhA+U9UO8ILwGdbFifOOEDBy4a4N4ATpPn1H7Qs= X-Gm-Gg: ASbGncuEWrJJ7r/dHXVGWTRFOg66halb4rby/5wBWjw6t9XcNb+xoRiv7QltcPT1CJn HmYtm3JUIKTwtzFlDr4X2CjPMLHFcvtaIrsD6g4cEn2N9C3iMg/61yB2qlPgzhgDekHbIynMZG6 nujADU9M8J7p4VCFkdI2eWTNLn5MDCZ1bAapa439O6t9RfKH63x6Jm+QJjHWEn2RoTC3DTLN4bm txU4eGY39syOMzzLgt+/V7pHK77XMGsmefv71QmCLBxnmvj2dDG37B4yMRDohj2WXJYKFxoQpss S6HTFRGGEHtCDNc89odYt79oMImGSkAqwztG04CG158hiS+iNuAlAH+2abmPkTyiHjpOXmZLDFF Go07mXUiGCsNxq2jy98XPOCx9 X-Google-Smtp-Source: AGHT+IFsmriwC7sM1H4SekuoxTk4S0bUk4TUqEUdLP6mEpfm4K0KojSVb0TkIY/Q7lu1c7nixhkmrw== X-Received: by 2002:a92:c24c:0:b0:40c:410d:dc35 with SMTP id e9e14a558f8ab-424819709a7mr96072735ab.21.1758400749673; Sat, 20 Sep 2025 13:39:09 -0700 (PDT) Received: from localhost ([140.82.166.162]) by smtp.gmail.com with ESMTPSA id e9e14a558f8ab-4248a975078sm17095365ab.17.2025.09.20.13.39.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 20 Sep 2025 13:39:09 -0700 (PDT) From: Andrew Jones To: iommu@lists.linux.dev, kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: jgg@nvidia.com, zong.li@sifive.com, tjeznach@rivosinc.com, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, anup@brainfault.org, atish.patra@linux.dev, tglx@linutronix.de, alex.williamson@redhat.com, paul.walmsley@sifive.com, palmer@dabbelt.com, alex@ghiti.fr Subject: [RFC PATCH v2 13/18] iommu/riscv: report iommu capabilities Date: Sat, 20 Sep 2025 15:39:03 -0500 Message-ID: <20250920203851.2205115-33-ajones@ventanamicro.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250920203851.2205115-20-ajones@ventanamicro.com> References: <20250920203851.2205115-20-ajones@ventanamicro.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Tomasz Jeznach Report RISC-V IOMMU capability required by the VFIO subsystem to enable PCIe device assignment. Signed-off-by: Tomasz Jeznach Signed-off-by: Andrew Jones --- drivers/iommu/riscv/iommu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c index 02f38aa0b231..5a0dd99f07d0 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -1452,6 +1452,17 @@ 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: + /* The RISC-V IOMMU is always DMA cache coherent. */ + 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); @@ -1531,6 +1542,7 @@ 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, -- 2.49.0 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 365D7CAC5A7 for ; Sat, 20 Sep 2025 20:39:26 +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=PiXdJwAl7rsjX5eTT1JTViUk4a5MVbAIIfd6HhhN748=; b=ReOl3zIPhFjb/4 DvZjAhSyHHwfj9i6T3T3OCAWh9EYdk1HKnTH8f+G/sQwRdsEzP+xbkRT9XBXtYT5kv5p8qFhy/YmF muAiJlXB3769nEputQrLYZW9tIUIDuBrdjqGy4gYqLLX4wfWl6yuFBUss/37DEIWm+KKuifRF1RI2 Nu+gkerCHopm0Jp4dmcyH8/uEbRkg0yBHlXd7KnDXdjHYx11xsLKP33UJIpEXOoCiQC16S/Kct9vY /6Amv2hS9cHqYiqkOtQYR7ppkfH80VqlseUn13fg1aG/hoTnuKsFj+dj7gCAIgCd6B+EmB26pVOe8 xwAnjsYBRbMQU2siF8rg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v04MY-00000005tox-47w0; Sat, 20 Sep 2025 20:39:19 +0000 Received: from mail-il1-x131.google.com ([2607:f8b0:4864:20::131]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v04MQ-00000005tXz-2pSk for linux-riscv@lists.infradead.org; Sat, 20 Sep 2025 20:39:13 +0000 Received: by mail-il1-x131.google.com with SMTP id e9e14a558f8ab-4248062c973so22987535ab.3 for ; Sat, 20 Sep 2025 13:39:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1758400750; x=1759005550; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=tiJg8ON0boDhCQorG+j+Xw5gw12MCBbaI74+jnmrMFk=; b=DihRN6J7Do4hIOOlELuEGv12GkELBadJCuznenHaXFw37qQfxoXMCL58YX3qEIVzVa hsa16WpMmJQGgr8rwa4CUghYkq3E4nqpBh9cnC8Tl1aUpYzp6TYf6soXVp9u6bO/et9+ t/BiZr+Y6PgrGJaWOXotBYEinfB9ExbXVXSa3mXlHl588UoxEnUt/oIK3btqEotp0iXa eyQ6KxpGZZj7ZZsLgMQB1s9inXhwHFcrxA3voOI5aVqGq1ka5/bqhMMY/ZaN8k7/YI0e 08c9UPVQaaYf0ugPg6fSPB+JrLTlbLLigvbCgUXXJYNBHwh7MvhGtnn0erXq+rmSBl/v EvTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758400750; x=1759005550; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=tiJg8ON0boDhCQorG+j+Xw5gw12MCBbaI74+jnmrMFk=; b=hTo1NmegGm5wUML40wArmjiEkSdIPI3UpJ6UlTRaVfGdNV5d869p8Nl+GIJprl+Igg CGwzA3zkgsv3LWD+OyyfJGEQGAMdhAH/G3P22jOB7taLx3QlVfh3bdS5nln5nrdiLZOy V720sCHfFMdBS3t+nAhswDnJSUGbsIVjIB7nEONmq2IOoDSntHw/Zt+4znyI9KMbizi7 YSkMow5R+D7Nhg/vtOsrcdUPetCDl+hUcv7LZPnJP6Kl16jgweGW2PkoPC0rQc/GPwx/ eamRWJmGBBcPG8gbGIZc6TY4JAvcFCnAuYY2TMMnaYWm+Ysmn0+HyyGdB8X5ilOQ9NBt KUTA== X-Forwarded-Encrypted: i=1; AJvYcCXOZGCz36qxUJIoRAoL8qIbB59gMDZwlInzjMafoHxDDfs8YTf8JTHqSllPWRmT3uROq+oAZuJzPhWWxA==@lists.infradead.org X-Gm-Message-State: AOJu0Yx1yOTs6TvKpfzZ4GGYUSJv0dUYPyDMaqQ8YL6zwqEEKspN5tM8 /+n1krSgfAF9tWoC7xE0iSFMEci6nJ0p6MljuUdNN2RpSQUjuJNpgdBLY+LavVpm1d0= X-Gm-Gg: ASbGncuFDSJBvG+beih5fRpbVTnXz6cyq22KKqAx1b5szbWiG2eAoTh6G+3FEmk2zz1 e0b6yOBNSuue7DAaZw8NO8PjcVihJvebO64x93zgpzbYTekIZkAudULwABdwYvwVFTzXjehQcUR 8Dl94HzLprUmTtO05832c74aJ+7brocmOHDMazc9x69BOet7AEutUU0aVNEA+e5mXlu2OhagRhn wY0RngklRBVl+jUROoETkv/DUKmFiVKLc8ViUvEQ5A0Udf0i7x7UkQzAH7P4czpkDMeI4Twg33E SxZrakfN0L2p8fY/O7u2xoXyxXYMO8AYv3r62AQyFk+zGA/r2B94M2IGvAy+ffh0hFbRB2m/IoV BIQpkd3IeHBT5ztSa/3J8NZbf X-Google-Smtp-Source: AGHT+IFsmriwC7sM1H4SekuoxTk4S0bUk4TUqEUdLP6mEpfm4K0KojSVb0TkIY/Q7lu1c7nixhkmrw== X-Received: by 2002:a92:c24c:0:b0:40c:410d:dc35 with SMTP id e9e14a558f8ab-424819709a7mr96072735ab.21.1758400749673; Sat, 20 Sep 2025 13:39:09 -0700 (PDT) Received: from localhost ([140.82.166.162]) by smtp.gmail.com with ESMTPSA id e9e14a558f8ab-4248a975078sm17095365ab.17.2025.09.20.13.39.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 20 Sep 2025 13:39:09 -0700 (PDT) From: Andrew Jones To: iommu@lists.linux.dev, kvm-riscv@lists.infradead.org, kvm@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: jgg@nvidia.com, zong.li@sifive.com, tjeznach@rivosinc.com, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, anup@brainfault.org, atish.patra@linux.dev, tglx@linutronix.de, alex.williamson@redhat.com, paul.walmsley@sifive.com, palmer@dabbelt.com, alex@ghiti.fr Subject: [RFC PATCH v2 13/18] iommu/riscv: report iommu capabilities Date: Sat, 20 Sep 2025 15:39:03 -0500 Message-ID: <20250920203851.2205115-33-ajones@ventanamicro.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250920203851.2205115-20-ajones@ventanamicro.com> References: <20250920203851.2205115-20-ajones@ventanamicro.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250920_133910_730671_9D46AD17 X-CRM114-Status: UNSURE ( 9.70 ) 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: Tomasz Jeznach Report RISC-V IOMMU capability required by the VFIO subsystem to enable PCIe device assignment. Signed-off-by: Tomasz Jeznach Signed-off-by: Andrew Jones --- drivers/iommu/riscv/iommu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c index 02f38aa0b231..5a0dd99f07d0 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -1452,6 +1452,17 @@ 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: + /* The RISC-V IOMMU is always DMA cache coherent. */ + 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); @@ -1531,6 +1542,7 @@ 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, -- 2.49.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv