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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 5860DCEBF96 for ; Mon, 17 Nov 2025 09:41:54 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vKvj7-0006Ef-Sz; Mon, 17 Nov 2025 04:40:49 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vKviI-0005BL-Ty for qemu-devel@nongnu.org; Mon, 17 Nov 2025 04:40:06 -0500 Received: from mgamail.intel.com ([192.198.163.9]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vKviF-0006HR-VN for qemu-devel@nongnu.org; Mon, 17 Nov 2025 04:39:58 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1763372396; x=1794908396; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=F/UlVir0CPbKiBxFTUK1dLBiSRa0vktrD+oJw9HyZT0=; b=g/3eNsBO2igncWG9UL76BCw5diQfEzTJlBCGfVXn8zeGDss2he/2iIFA 4LEYR/W1Ljwaan0yHX6LBsdvDO2JiFeaude1SZjXaT+k+8esEbcj3aphA akVt7LnQs46Pa/RxqBJiv3qVIyJ/VYG53MUi3voqWsLPeZ/35W09QlHBA XgMKZuKNzR4Alb4AQBCPy9OAn8aZMm3BrT7A/GbIsKZ44ls4SXqibj5mH WlUr+GwvaIbxyQwM1VbMLNZWOwfCRvTDJaZ+Q9U2whs1fyeQo6eMgkDfj KRuZf14DnBmOLwQi2YXsvJHCqpbwo3AUD9LsAMr06muD5mnthOJZb+vz7 A==; X-CSE-ConnectionGUID: YxRGx4xiQ2S5SdpG+MD9jg== X-CSE-MsgGUID: nBTHY5xDQn64jwBkBv9nfA== X-IronPort-AV: E=McAfee;i="6800,10657,11615"; a="76046064" X-IronPort-AV: E=Sophos;i="6.19,311,1754982000"; d="scan'208";a="76046064" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2025 01:39:44 -0800 X-CSE-ConnectionGUID: t/DiLwDIRNW/fW4ZYlBRgA== X-CSE-MsgGUID: pWgY1I2bRCeseY8sgrwcQA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,311,1754982000"; d="scan'208";a="190070978" Received: from unknown (HELO gnr-sp-2s-612.sh.intel.com) ([10.112.230.229]) by fmviesa007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2025 01:39:40 -0800 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex@shazbot.org, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com, jasowang@redhat.com, peterx@redhat.com, ddutile@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, skolothumtho@nvidia.com, joao.m.martins@oracle.com, clement.mathieu--drif@eviden.com, kevin.tian@intel.com, yi.l.liu@intel.com, chao.p.peng@intel.com, Zhenzhong Duan Subject: [PATCH v8 18/23] intel_iommu: Add migration support with x-flts=on Date: Mon, 17 Nov 2025 04:37:21 -0500 Message-ID: <20251117093729.1121324-19-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20251117093729.1121324-1-zhenzhong.duan@intel.com> References: <20251117093729.1121324-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=192.198.163.9; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org When x-flts=on, we set up bindings to nested HWPT in host, after migration, VFIO device binds to nesting parent HWPT by default. We need to re-establish the bindings to nested HWPT, or else device DMA will break. Signed-off-by: Zhenzhong Duan Reviewed-by: Eric Auger --- hw/i386/intel_iommu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 42c1bf48f1..269b7da958 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -4091,6 +4091,13 @@ static int vtd_post_load(void *opaque, int version_id) */ vtd_switch_address_space_all(iommu); + /* + * Bindings to nested HWPT in host is set up dynamically depending + * on pasid entry configuration from guest. After migration, we + * need to re-establish the bindings before restoring device's DMA. + */ + vtd_replay_pasid_bindings_all(iommu); + return 0; } -- 2.47.1