From patchwork Thu Feb 1 07:28:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Duan, Zhenzhong" X-Patchwork-Id: 13540739 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 1F90CC47DDB for ; Thu, 1 Feb 2024 07:33:48 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rVRXs-0006ST-QI; Thu, 01 Feb 2024 02:31:36 -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 1rVRXp-0006HV-B5 for qemu-devel@nongnu.org; Thu, 01 Feb 2024 02:31:33 -0500 Received: from mgamail.intel.com ([192.55.52.120]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rVRXl-0001hD-Mo for qemu-devel@nongnu.org; Thu, 01 Feb 2024 02:31:32 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1706772689; x=1738308689; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Idmve9hI3M5yptuDUtlLrnV5peWHH6TGUubN6UCkLTk=; b=BBYYiSRWEizSLO01xrEc3EKKfUxAenLp46LpDg941Q0bPfMukQYkaFZj 84XDzm1B6SBLr892ZMZQLLzLHvDeYtnH4hAxg3D5csfV+Q1NF1UeDtnFq /Lsut2yX+ttc6dSSQ4ktYiRo/C+z/+mdCASYq6dZBczheIQVnNwcxJklg FVKO6yVdXrKGvAY02qz36ZG+apqknoyXoXLTxdxmK6Uc4iRIlHZQ15HWv YOwq/8Hj2ScBj5O1EqorZfSQlvtcNxZmh7X0cM0COujuJ++tGwVKV+hzP tDpXmN9SC/gx3Q3V0QPQdkFj8LdHVGru4Pzlwjy2K61ttzYIy9Ko+lAVF w==; X-IronPort-AV: E=McAfee;i="6600,9927,10969"; a="402676889" X-IronPort-AV: E=Sophos;i="6.05,234,1701158400"; d="scan'208";a="402676889" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jan 2024 23:31:28 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,234,1701158400"; d="scan'208";a="4443363" Received: from spr-s2600bt.bj.intel.com ([10.240.192.124]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jan 2024 23:31:23 -0800 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, peterx@redhat.com, jasowang@redhat.com, mst@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, joao.m.martins@oracle.com, kevin.tian@intel.com, yi.l.liu@intel.com, yi.y.sun@intel.com, chao.p.peng@intel.com, Yi Sun , Zhenzhong Duan , Paolo Bonzini , Richard Henderson , Eduardo Habkost , Marcel Apfelbaum Subject: [PATCH rfcv2 14/18] intel_iommu: Add a framework to check and sync host IOMMU cap/ecap Date: Thu, 1 Feb 2024 15:28:14 +0800 Message-Id: <20240201072818.327930-15-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240201072818.327930-1-zhenzhong.duan@intel.com> References: <20240201072818.327930-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.120; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -56 X-Spam_score: -5.7 X-Spam_bar: ----- X-Spam_report: (-5.7 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.292, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 From: Yi Liu Add a framework to check and synchronize host IOMMU cap/ecap with vIOMMU cap/ecap. The sequence will be: vtd_cap_init() initializes iommu->cap/ecap. vtd_check_hdev() update iommu->cap/ecap based on host cap/ecap. iommu->cap_frozen set when machine create done, iommu->cap/ecap become readonly. Implementation details for different backends will be in following patches. Signed-off-by: Yi Liu Signed-off-by: Yi Sun Signed-off-by: Zhenzhong Duan --- include/hw/i386/intel_iommu.h | 1 + hw/i386/intel_iommu.c | 41 ++++++++++++++++++++++++++++++++++- 2 files changed, 41 insertions(+), 1 deletion(-) diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h index bbc7b96add..c71a133820 100644 --- a/include/hw/i386/intel_iommu.h +++ b/include/hw/i386/intel_iommu.h @@ -283,6 +283,7 @@ struct IntelIOMMUState { uint64_t cap; /* The value of capability reg */ uint64_t ecap; /* The value of extended capability reg */ + bool cap_frozen; /* cap/ecap become read-only after frozen */ uint32_t context_cache_gen; /* Should be in [1,MAX] */ GHashTable *iotlb; /* IOTLB */ diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index ffa1ad6429..7ed2b79669 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -3819,6 +3819,31 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, return vtd_dev_as; } +static int vtd_check_legacy_hdev(IntelIOMMUState *s, + IOMMULegacyDevice *ldev, + Error **errp) +{ + return 0; +} + +static int vtd_check_iommufd_hdev(IntelIOMMUState *s, + IOMMUFDDevice *idev, + Error **errp) +{ + return 0; +} + +static int vtd_check_hdev(IntelIOMMUState *s, VTDHostIOMMUDevice *vtd_hdev, + Error **errp) +{ + HostIOMMUDevice *base_dev = vtd_hdev->dev; + + if (base_dev->type == HID_LEGACY) { + return vtd_check_legacy_hdev(s, vtd_hdev->ldev, errp); + } + return vtd_check_iommufd_hdev(s, vtd_hdev->idev, errp); +} + static int vtd_dev_set_iommu_device(PCIBus *bus, void *opaque, int devfn, HostIOMMUDevice *base_dev, Error **errp) { @@ -3829,6 +3854,7 @@ static int vtd_dev_set_iommu_device(PCIBus *bus, void *opaque, int devfn, .devfn = devfn, }; struct vtd_as_key *new_key; + int ret; assert(base_dev); @@ -3848,6 +3874,13 @@ static int vtd_dev_set_iommu_device(PCIBus *bus, void *opaque, int devfn, vtd_hdev->iommu_state = s; vtd_hdev->dev = base_dev; + ret = vtd_check_hdev(s, vtd_hdev, errp); + if (ret) { + g_free(vtd_hdev); + vtd_iommu_unlock(s); + return ret; + } + new_key = g_malloc(sizeof(*new_key)); new_key->bus = bus; new_key->devfn = devfn; @@ -4083,7 +4116,9 @@ static void vtd_init(IntelIOMMUState *s) s->iq_dw = false; s->next_frcd_reg = 0; - vtd_cap_init(s); + if (!s->cap_frozen) { + vtd_cap_init(s); + } /* * Rsvd field masks for spte @@ -4254,6 +4289,10 @@ static int vtd_machine_done_notify_one(Object *child, void *unused) static void vtd_machine_done_hook(Notifier *notifier, void *unused) { + IntelIOMMUState *iommu = INTEL_IOMMU_DEVICE(x86_iommu_get_default()); + + iommu->cap_frozen = true; + object_child_foreach_recursive(object_get_root(), vtd_machine_done_notify_one, NULL); }