From nobody Sat Apr 27 03:40:40 2024 Delivered-To: importer@patchew.org Received-SPF: none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1565261685; cv=none; d=zoho.com; s=zohoarc; b=Vdq3u87QbzGw9xSfkVnKcDLshyvtXBv2lJPmN2s6fGVDRGQPQ5fT/KmelD6fYELc3ptWyBtPtfxLZlH01qi6GH3pNNLcUVwDUfvmAEdbwQXd7KREZVkO1/mTRRUBZeBl0pqvxWOmjszn5aeg4uWtjwhYv7GKIiWh30Pr2v5ykUI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1565261685; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:To:ARC-Authentication-Results; bh=p5q96b2fYi0D1Pftp7TG7qtG0ZQKnH7cNJCi3yywXBo=; b=g0gt/lSsDNxv1VrOodwp/owIT45rLCLfwTsilnpNVZk8thPbSSCDDHOLO7Y+nZ9Z6/Rp802aRXB+NOZnVcGmkRNODDxVBpoKxFxt4DWsXSzYFy6JsB2a02RMqIvAtgKgbswHpJOOtTi8R5VzsEggZ+zTZjBu7y9hh9BacOm3gTw= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=fail; spf=none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1565261685826349.12890185466915; Thu, 8 Aug 2019 03:54:45 -0700 (PDT) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hvg35-0004kU-Go; Thu, 08 Aug 2019 10:53:35 +0000 Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hvg34-0004kP-7q for xen-devel@lists.xenproject.org; Thu, 08 Aug 2019 10:53:34 +0000 Received: from mail-lf1-x144.google.com (unknown [2a00:1450:4864:20::144]) by us1-rack-dfw2.inumbo.com (Halon) with ESMTPS id c33b47e5-b9ca-11e9-8980-bc764e045a96; Thu, 08 Aug 2019 10:53:33 +0000 (UTC) Received: by mail-lf1-x144.google.com with SMTP id b17so66497315lff.7 for ; Thu, 08 Aug 2019 03:53:32 -0700 (PDT) Received: from otyshchenko.kyiv.epam.com (ll-22.209.223.85.sovam.net.ua. [85.223.209.22]) by smtp.gmail.com with ESMTPSA id k27sm18476194lfm.90.2019.08.08.03.53.30 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 08 Aug 2019 03:53:31 -0700 (PDT) X-Inumbo-ID: c33b47e5-b9ca-11e9-8980-bc764e045a96 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=uvOnSc3Xt5y6r2YY3KMXL1DgVa0dZrUp/NOg5YZRDIY=; b=BeJ8eS7HF26NWaXJMuNJI0ltnipA5/9wAf1NOyMAmqwF/wevnNkIe5kxX8hg3wO+4O gutVjQ6T62axg1eAcEs4bBm9Yu3XYD1gTMywoLGbsTcPSDbWs+p2Xq6dFumFiZvNYGls OLkL3x2kCyiO6kvr+jG1Km4XXbudCh3pPxH9GkzRlaDY2YGPSB75zbUvj2LTJdeXmG0A /tOiPvJASzs6sI7DZ9MZ6uIbWcL97SQZv+8AOpdyOw8gmzDt0qc7uo3tPecvsu29Kfi0 yFzTlirq/dImGNk1E1a9JEpInbiKM847a0n0TDrpi/23sxookHXywPFleBnW+Cs2ny/K 5jkg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=uvOnSc3Xt5y6r2YY3KMXL1DgVa0dZrUp/NOg5YZRDIY=; b=cegtXkCRtYfidXNP6usEVBQp+WntF4pREKXkCN57pAAiHlmLxJfOe9b6ybhnuD+Wp9 Y0+uQ8WYs7k0wwrm8+bPX3fm2oRiW2x8ZA/+KtQWexrszYEWL2dXNWUZw5vMhiwtwU1A BCMqbIDT063kAK0dtKUOhgN0MuAqPRrm78WPkHx/6x/qEhWjTOLl1h5jE+Nsea88rP82 lkIetLxWAE/ezaemhmURquDoCjAEGLjLdpQB7hxTyQylhpY3iQo61AK5ec7ytA133lt3 zDdqLhRjaCqVOJALhKpAILshj9KmjkdCs4WPWHJCFqswjecqNeU2BV5DFe2shBR4T3w+ 2A/Q== X-Gm-Message-State: APjAAAURsp09jPbyAc9E7G1fysVxWyrsDBPOZI1j96jMC/ZvwXqYNIn+ JpPAr3CFk9b/64Guw+awmYBM0fayOC4= X-Google-Smtp-Source: APXvYqwfx7Ky9kleMP+qFT4llxMthzmKBM3pt9K0658ye/SDfidOpgJ0NK/Z5VttCzVHPpFFLY2wiw== X-Received: by 2002:ac2:44ac:: with SMTP id c12mr205631lfm.33.1565261611568; Thu, 08 Aug 2019 03:53:31 -0700 (PDT) From: Oleksandr Tyshchenko To: xen-devel@lists.xenproject.org Date: Thu, 8 Aug 2019 13:53:23 +0300 Message-Id: <1565261603-9632-1-git-send-email-olekstysh@gmail.com> X-Mailer: git-send-email 2.7.4 Subject: [Xen-devel] [PATCH] xen/arm: Let the IOMMU be accessible by Dom0 if forcibly disabled in Xen X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Oleksandr Tyshchenko , julien.grall@arm.com, sstabellini@kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) From: Oleksandr Tyshchenko Don't skip IOMMU nodes when creating DT for Dom0 if IOMMU has been forcibly disabled in bootargs (e.g. "iommu=3D0") in order to let the IOMMU be accessible by DOM0. Signed-off-by: Oleksandr Tyshchenko --- I have heard there is a "possible" case when the IOMMU could be accessible = by DOM0. So, I think, for this to work we need to create corresponding DT nodes in t= he DT at least. --- xen/arch/arm/domain_build.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index d67f7d4..ff88099 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -1403,9 +1403,11 @@ static int __init handle_node(struct domain *d, stru= ct kernel_info *kinfo, =20 /* * Even if the IOMMU device is not used by Xen, it should not be - * passthrough to DOM0 + * passthrough to DOM0. The exception here is the fact that IOMMU + * has been forcibly disabled in bootargs "iommu=3D0" in order to let + * the IOMMU be accessible by DOM0. */ - if ( device_get_class(node) =3D=3D DEVICE_IOMMU ) + if ( device_get_class(node) =3D=3D DEVICE_IOMMU && iommu_enable ) { dt_dprintk(" IOMMU, skip it\n"); return 0; --=20 2.7.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel