From nobody Mon Feb 9 17:05:29 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1571923297; cv=none; d=zoho.com; s=zohoarc; b=M+oMCjEI5A5ZCg+Hc5ud8RzQ61oUGX9/HOSqx2XVInX+h9JZuHoVZ3N9QHhmW1mcDg1oD3vAaZNFDUeV/y0w5sUqWq/fsLO2dNnDSawuhKBswCSOzCJ8z5oqzX+IziWviyFp9CDxvyJF7qJinXBE3lDMeX8nsMj3+7lBk05C3T8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1571923297; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=mw1J+RUCLgji/dWtB9+VCxH5SLNUYvjXclpzoMQRhTU=; b=kDHg9lf0dh+N2Hz0gpq5c9ldg28dmUYRkGzjhcxqcWGOwsng/TsLWTVm+f7OyWs093eznhjh1A6mw1OrnbZm3/YFmsRUhfJV8dx5DFP8F67vfqViMNHCF63AyJkij161hH2nEl5yWVT7LYiliiNgDDsHkKxQarfgJoJCKjEaLpU= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1571923297452145.8159761418965; Thu, 24 Oct 2019 06:21:37 -0700 (PDT) Received: from localhost ([::1]:42424 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iNd3X-0002Js-MF for importer@patchew.org; Thu, 24 Oct 2019 09:21:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51406) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iNckI-0005FS-Em for qemu-devel@nongnu.org; Thu, 24 Oct 2019 09:01:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iNckG-0002SO-Cr for qemu-devel@nongnu.org; Thu, 24 Oct 2019 09:01:42 -0400 Received: from mga11.intel.com ([192.55.52.93]:40494) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iNckF-0002O1-GA for qemu-devel@nongnu.org; Thu, 24 Oct 2019 09:01:39 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Oct 2019 06:01:21 -0700 Received: from iov.bj.intel.com ([10.238.145.67]) by fmsmga001.fm.intel.com with ESMTP; 24 Oct 2019 06:01:18 -0700 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,224,1569308400"; d="scan'208";a="210156175" From: Liu Yi L To: qemu-devel@nongnu.org, mst@redhat.com, pbonzini@redhat.com, alex.williamson@redhat.com, peterx@redhat.com Subject: [RFC v2 04/22] hw/iommu: introduce IOMMUContext Date: Thu, 24 Oct 2019 08:34:25 -0400 Message-Id: <1571920483-3382-5-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1571920483-3382-1-git-send-email-yi.l.liu@intel.com> References: <1571920483-3382-1-git-send-email-yi.l.liu@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.93 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tianyu.lan@intel.com, kevin.tian@intel.com, yi.l.liu@intel.com, Yi Sun , kvm@vger.kernel.org, jun.j.tian@intel.com, eric.auger@redhat.com, yi.y.sun@intel.com, jacob.jun.pan@linux.intel.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Peter Xu This patch adds IOMMUContext as an abstract layer of IOMMU related operations. The current usage of this abstract layer is setup dual- stage IOMMU translation (vSVA) for vIOMMU. To setup dual-stage IOMMU translation, vIOMMU needs to propagate guest changes to host via passthru channels (e.g. VFIO). To have a better abstraction, it is better to avoid direct calling between vIOMMU and VFIO. So we have this new structure to act as abstract layer between VFIO and vIOMMU. So far, it is proposed to provide a notifier mechanism, which registered by VFIO and fired by vIOMMU. For more background, may refer to the discussion below: https://lists.gnu.org/archive/html/qemu-devel/2019-07/msg05022.html Cc: Kevin Tian Cc: Jacob Pan Cc: Peter Xu Cc: Eric Auger Cc: Yi Sun Cc: David Gibson Signed-off-by: Peter Xu Signed-off-by: Liu Yi L --- hw/Makefile.objs | 1 + hw/iommu/Makefile.objs | 1 + hw/iommu/iommu.c | 66 ++++++++++++++++++++++++++++++++++++++++ include/hw/iommu/iommu.h | 79 ++++++++++++++++++++++++++++++++++++++++++++= ++++ 4 files changed, 147 insertions(+) create mode 100644 hw/iommu/Makefile.objs create mode 100644 hw/iommu/iommu.c create mode 100644 include/hw/iommu/iommu.h diff --git a/hw/Makefile.objs b/hw/Makefile.objs index ece6cc3..ac19f9c 100644 --- a/hw/Makefile.objs +++ b/hw/Makefile.objs @@ -39,6 +39,7 @@ devices-dirs-y +=3D xen/ devices-dirs-$(CONFIG_MEM_DEVICE) +=3D mem/ devices-dirs-y +=3D semihosting/ devices-dirs-y +=3D smbios/ +devices-dirs-y +=3D iommu/ endif =20 common-obj-y +=3D $(devices-dirs-y) diff --git a/hw/iommu/Makefile.objs b/hw/iommu/Makefile.objs new file mode 100644 index 0000000..0484b79 --- /dev/null +++ b/hw/iommu/Makefile.objs @@ -0,0 +1 @@ +obj-y +=3D iommu.o diff --git a/hw/iommu/iommu.c b/hw/iommu/iommu.c new file mode 100644 index 0000000..2391b0d --- /dev/null +++ b/hw/iommu/iommu.c @@ -0,0 +1,66 @@ +/* + * QEMU abstract of IOMMU context + * + * Copyright (C) 2019 Red Hat Inc. + * + * Authors: Peter Xu , + * Liu Yi L + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License along + * with this program; if not, see . + */ + +#include "qemu/osdep.h" +#include "hw/iommu/iommu.h" + +void iommu_ctx_notifier_register(IOMMUContext *iommu_ctx, + IOMMUCTXNotifier *n, + IOMMUCTXNotifyFn fn, + IOMMUCTXEvent event) +{ + n->event =3D event; + n->iommu_ctx_event_notify =3D fn; + QLIST_INSERT_HEAD(&iommu_ctx->iommu_ctx_notifiers, n, node); + return; +} + +void iommu_ctx_notifier_unregister(IOMMUContext *iommu_ctx, + IOMMUCTXNotifier *notifier) +{ + IOMMUCTXNotifier *cur, *next; + + QLIST_FOREACH_SAFE(cur, &iommu_ctx->iommu_ctx_notifiers, node, next) { + if (cur =3D=3D notifier) { + QLIST_REMOVE(cur, node); + break; + } + } +} + +void iommu_ctx_event_notify(IOMMUContext *iommu_ctx, + IOMMUCTXEventData *event_data) +{ + IOMMUCTXNotifier *cur; + + QLIST_FOREACH(cur, &iommu_ctx->iommu_ctx_notifiers, node) { + if ((cur->event =3D=3D event_data->event) && + cur->iommu_ctx_event_notify) { + cur->iommu_ctx_event_notify(cur, event_data); + } + } +} + +void iommu_context_init(IOMMUContext *iommu_ctx) +{ + QLIST_INIT(&iommu_ctx->iommu_ctx_notifiers); +} diff --git a/include/hw/iommu/iommu.h b/include/hw/iommu/iommu.h new file mode 100644 index 0000000..c22c442 --- /dev/null +++ b/include/hw/iommu/iommu.h @@ -0,0 +1,79 @@ +/* + * QEMU abstraction of IOMMU Context + * + * Copyright (C) 2019 Red Hat Inc. + * + * Authors: Peter Xu , + * Liu, Yi L + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License along + * with this program; if not, see . + */ + +#ifndef HW_PCI_PASID_H +#define HW_PCI_PASID_H + +#include "qemu/queue.h" +#ifndef CONFIG_USER_ONLY +#include "exec/hwaddr.h" +#endif + +typedef struct IOMMUContext IOMMUContext; + +enum IOMMUCTXEvent { + IOMMU_CTX_EVENT_NUM, +}; +typedef enum IOMMUCTXEvent IOMMUCTXEvent; + +struct IOMMUCTXEventData { + IOMMUCTXEvent event; + uint64_t length; + void *data; +}; +typedef struct IOMMUCTXEventData IOMMUCTXEventData; + +typedef struct IOMMUCTXNotifier IOMMUCTXNotifier; + +typedef void (*IOMMUCTXNotifyFn)(IOMMUCTXNotifier *notifier, + IOMMUCTXEventData *event_data); + +struct IOMMUCTXNotifier { + IOMMUCTXNotifyFn iommu_ctx_event_notify; + /* + * What events we are listening to. Let's allow multiple event + * registrations from beginning. + */ + IOMMUCTXEvent event; + QLIST_ENTRY(IOMMUCTXNotifier) node; +}; + +/* + * This is an abstraction of IOMMU context. + */ +struct IOMMUContext { + uint32_t pasid; + QLIST_HEAD(, IOMMUCTXNotifier) iommu_ctx_notifiers; +}; + +void iommu_ctx_notifier_register(IOMMUContext *iommu_ctx, + IOMMUCTXNotifier *n, + IOMMUCTXNotifyFn fn, + IOMMUCTXEvent event); +void iommu_ctx_notifier_unregister(IOMMUContext *iommu_ctx, + IOMMUCTXNotifier *notifier); +void iommu_ctx_event_notify(IOMMUContext *iommu_ctx, + IOMMUCTXEventData *event_data); + +void iommu_context_init(IOMMUContext *iommu_ctx); + +#endif --=20 2.7.4