From patchwork Thu Mar 1 10:31:53 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Liu, Yi L" X-Patchwork-Id: 10250883 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 738F86037D for ; Thu, 1 Mar 2018 10:50:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 608E4204FB for ; Thu, 1 Mar 2018 10:50:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5562728F53; Thu, 1 Mar 2018 10:50:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A169128FA0 for ; Thu, 1 Mar 2018 10:50:13 +0000 (UTC) Received: from localhost ([::1]:55502 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1erLmu-00057v-SX for patchwork-qemu-devel@patchwork.kernel.org; Thu, 01 Mar 2018 05:50:12 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52677) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1erLli-00048d-7T for qemu-devel@nongnu.org; Thu, 01 Mar 2018 05:49:00 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1erLlg-0007iF-LY for qemu-devel@nongnu.org; Thu, 01 Mar 2018 05:48:58 -0500 Received: from mga14.intel.com ([192.55.52.115]:7314) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1erLlg-0007fT-8o for qemu-devel@nongnu.org; Thu, 01 Mar 2018 05:48:56 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Mar 2018 02:48:55 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,408,1515484800"; d="scan'208";a="31611614" Received: from sky-dev.bj.intel.com ([10.238.144.105]) by orsmga003.jf.intel.com with ESMTP; 01 Mar 2018 02:48:53 -0800 From: "Liu, Yi L" To: qemu-devel@nongnu.org, mst@redhat.com, david@gibson.dropbear.id.au Date: Thu, 1 Mar 2018 18:31:53 +0800 Message-Id: <1519900322-30263-4-git-send-email-yi.l.liu@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1519900322-30263-1-git-send-email-yi.l.liu@linux.intel.com> References: <1519900322-30263-1-git-send-email-yi.l.liu@linux.intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.115 Subject: [Qemu-devel] [PATCH v3 03/12] hw/core: introduce IOMMUSVAContext for virt-SVA X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, alex.williamson@redhat.com, "Liu, Yi L" , eric.auger.pro@gmail.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Peter Xu This patch adds IOMMUSVAContext as an abstract for virt-SVA in Qemu. IOMMUSVAContext is per-PASID(Process Address Space Identity). A PASID Tagged AddressSpace should have an IOMMUSVAContext created for it. virt-SVA emulation for emulated SVA capable devices would use IOMMUSVAContext. And for assigned devices, Qemu also needs to propagate guest tlb flush to host through the sva_notifer based on IOMMUSVAContext. This patch proposes to include a sva_notifier list and an IOMMUSVAContextOps in IOMMUSVAContext. * The sva_notifier list would include tlb invalidate nofitifer to propagate guest's iotlb flush to host. * The first callback in IOMMUSVAContextOps would be an address translation callback. For the SVA aware DMAs issued by emulated SVA capable devices, it requires Qemu to emulate data read/write to guest process address space. Qemu needs to do address translation with guest process page table. So the IOMMUSVAContextOps.translate() callback would be helpful for emulating SVA capable devices. Note: to fulfill the IOMMUSVAContext based address translation framework, may duplicate quite a few existing MemoryRegion based translation code in Qemu. As this patchset is mainly to support assigned SVA capable devices. So this patchset hasn't done the duplication. In future, if any requirement for emulating SVA capable device, it would require a separate patchset to fulfill the translation framework. Signed-off-by: Peter Xu Signed-off-by: Liu, Yi L --- hw/core/Makefile.objs | 1 + hw/core/pasid.c | 64 ++++++++++++++++++++++++++++ include/hw/core/pasid.h | 110 ++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 175 insertions(+) create mode 100644 hw/core/pasid.c create mode 100644 include/hw/core/pasid.h diff --git a/hw/core/Makefile.objs b/hw/core/Makefile.objs index 1240728..01989d2 100644 --- a/hw/core/Makefile.objs +++ b/hw/core/Makefile.objs @@ -6,6 +6,7 @@ common-obj-$(CONFIG_SOFTMMU) += fw-path-provider.o # irq.o needed for qdev GPIO handling: common-obj-y += irq.o common-obj-y += hotplug.o +common-obj-y += pasid.o common-obj-$(CONFIG_SOFTMMU) += nmi.o common-obj-$(CONFIG_EMPTY_SLOT) += empty_slot.o diff --git a/hw/core/pasid.c b/hw/core/pasid.c new file mode 100644 index 0000000..c4b0c5d --- /dev/null +++ b/hw/core/pasid.c @@ -0,0 +1,64 @@ +/* + * QEMU abstract of Shared Virtual Memory logic + * + * Copyright (C) 2018 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/core/pasid.h" + +void iommu_sva_notifier_register(IOMMUSVAContext *sva_ctx, + IOMMUSVANotifier *n, + IOMMUSVANotifyFn fn, + IOMMUSVAEvent event) +{ + n->event = event; + n->sva_notify = fn; + QLIST_INSERT_HEAD(&sva_ctx->sva_notifiers, n, node); + return; +} + +void iommu_sva_notifier_unregister(IOMMUSVAContext *sva_ctx, + IOMMUSVANotifier *notifier) +{ + IOMMUSVANotifier *cur, *next; + + QLIST_FOREACH_SAFE(cur, &sva_ctx->sva_notifiers, node, next) { + if (cur == notifier) { + QLIST_REMOVE(cur, node); + break; + } + } +} + +void iommu_sva_notify(IOMMUSVAContext *sva_ctx, IOMMUSVAEventData *event_data) +{ + IOMMUSVANotifier *cur; + + QLIST_FOREACH(cur, &sva_ctx->sva_notifiers, node) { + if ((cur->event == event_data->event) && cur->sva_notify) { + cur->sva_notify(cur, event_data); + } + } +} + +void iommu_sva_ctx_init(IOMMUSVAContext *sva_ctx) +{ + QLIST_INIT(&sva_ctx->sva_notifiers); +} diff --git a/include/hw/core/pasid.h b/include/hw/core/pasid.h new file mode 100644 index 0000000..4c7dccb --- /dev/null +++ b/include/hw/core/pasid.h @@ -0,0 +1,110 @@ +/* + * QEMU abstraction of Shared Virtual Memory + * + * Copyright (C) 2018 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 IOMMUSVAContext IOMMUSVAContext; + +enum IOMMUSVAEvent { + IOMMU_SVA_EVENT_TLB_INV, +}; +typedef enum IOMMUSVAEvent IOMMUSVAEvent; + +struct IOMMUSVAEventData { + IOMMUSVAEvent event; + uint64_t length; + void *data; +}; +typedef struct IOMMUSVAEventData IOMMUSVAEventData; + +typedef struct IOMMUSVANotifier IOMMUSVANotifier; + +typedef void (*IOMMUSVANotifyFn)(IOMMUSVANotifier *notifier, + IOMMUSVAEventData *event_data); + +typedef struct IOMMUSVATLBEntry IOMMUSVATLBEntry; + +/* See address_space_translate: bit 0 is read, bit 1 is write. */ +typedef enum { + IOMMU_SVA_NONE = 0, + IOMMU_SVA_RO = 1, + IOMMU_SVA_WO = 2, + IOMMU_SVA_RW = 3, +} IOMMUSVAAccessFlags; + +#define IOMMU_SVA_ACCESS_FLAG(r, w) (((r) ? IOMMU_SVA_RO : 0) | \ + ((w) ? IOMMU_SVA_WO : 0)) + +struct IOMMUSVATLBEntry { + AddressSpace *target_as; + hwaddr va; + hwaddr translated_addr; + hwaddr addr_mask; /* 0xfff = 4k translation */ + IOMMUSVAAccessFlags perm; +}; + +typedef struct IOMMUSVAContextOps IOMMUSVAContextOps; +struct IOMMUSVAContextOps { + /* Return a TLB entry that contains a given address. */ + IOMMUSVATLBEntry (*translate)(IOMMUSVAContext *sva_ctx, + hwaddr addr, bool is_write); +}; + +struct IOMMUSVANotifier { + IOMMUSVANotifyFn sva_notify; + /* + * What events we are listening to. Let's allow multiple event + * registrations from beginning. + */ + IOMMUSVAEvent event; + QLIST_ENTRY(IOMMUSVANotifier) node; +}; + +/* + * This stands for an IOMMU unit. Any translation device should have + * this struct inside its own structure to make sure it can leverage + * common IOMMU functionalities. + */ +struct IOMMUSVAContext { + uint32_t pasid; + QLIST_HEAD(, IOMMUSVANotifier) sva_notifiers; + const IOMMUSVAContextOps *sva_ctx_ops; +}; + +void iommu_sva_notifier_register(IOMMUSVAContext *sva_ctx, + IOMMUSVANotifier *n, + IOMMUSVANotifyFn fn, + IOMMUSVAEvent event); +void iommu_sva_notifier_unregister(IOMMUSVAContext *sva_ctx, + IOMMUSVANotifier *notifier); +void iommu_sva_notify(IOMMUSVAContext *sva_ctx, + IOMMUSVAEventData *event_data); + +void iommu_sva_ctx_init(IOMMUSVAContext *sva_ctx); + +#endif