From patchwork Tue May 7 09:20:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Duan, Zhenzhong" X-Patchwork-Id: 13656465 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 29579C10F1A for ; Tue, 7 May 2024 09:27:08 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1s4H4j-0003XO-P3; Tue, 07 May 2024 05:25:29 -0400 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 1s4H3r-0001DV-Aj for qemu-devel@nongnu.org; Tue, 07 May 2024 05:24:35 -0400 Received: from mgamail.intel.com ([198.175.65.21]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1s4H3k-0000Bi-93 for qemu-devel@nongnu.org; Tue, 07 May 2024 05:24:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715073868; x=1746609868; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=3/+z84KmMKFWfq3QNUgQrXw0OJL3z4Glfwf5rFi/pZE=; b=QqDSArtfCSA2UiRQtJNE4xX+xSmcThM6FGVs9oT9pGqDDf76EEbIRLbZ RjHo/8e7Zc4UryF3fOoGlc3SB8ayi6Lu6YqNvsdyL9xxscVwh0wmQKkAr A+yOk71s+K1UFRgiEEsnXcKSZTPjMFW22rS6vRFD6/+n2w0JoWu9QIhlQ /7FQIbZKFLIJBlh5sg0i/yI2BuQgtp5X8IOSLlsH+RaOCsRmmZtGnFOa9 k2s0TDZLB639qkVWK16KEYkNuX/48rnd2A7lcPJ8Csvh/YFVFQNF68UcQ qzpZqKZqQsc8e0UOO1WgL3lXy96taCjXR9B2SZnK1B6Fvm5/xiUlNZPVu A==; X-CSE-ConnectionGUID: gxDPmfikTTm0E0L5Srd5Bw== X-CSE-MsgGUID: Cu/JfiaLS0Oc5nUMrRCyfA== X-IronPort-AV: E=McAfee;i="6600,9927,11065"; a="10785367" X-IronPort-AV: E=Sophos;i="6.07,260,1708416000"; d="scan'208";a="10785367" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 May 2024 02:24:22 -0700 X-CSE-ConnectionGUID: 8WBviFWnSQWDIpz86d+rQw== X-CSE-MsgGUID: B0srRDbxT1mR+ToAgplihw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,260,1708416000"; d="scan'208";a="28553563" Received: from unknown (HELO SPR-S2600BT.bj.intel.com) ([10.240.192.124]) by fmviesa010-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 May 2024 02:24:17 -0700 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com, peterx@redhat.com, jasowang@redhat.com, jgg@nvidia.com, nicolinc@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 , Marcel Apfelbaum , Paolo Bonzini , Richard Henderson , Eduardo Habkost Subject: [PATCH v4 19/19] intel_iommu: Check compatibility with host IOMMU capabilities Date: Tue, 7 May 2024 17:20:43 +0800 Message-Id: <20240507092043.1172717-20-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240507092043.1172717-1-zhenzhong.duan@intel.com> References: <20240507092043.1172717-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=198.175.65.21; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -49 X-Spam_score: -5.0 X-Spam_bar: ----- X-Spam_report: (-5.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.581, 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 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 If check fails, host device (either VFIO or VDPA device) is not compatible with current vIOMMU config and should not be passed to guest. Only aw_bits is checked for now, we don't care other capabilities before scalable modern mode is introduced. Signed-off-by: Yi Liu Signed-off-by: Zhenzhong Duan Signed-off-by: Yi Liu Signed-off-by: Zhenzhong Duan Signed-off-by: Yi Liu Signed-off-by: Zhenzhong Duan --- hw/i386/intel_iommu.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 747c988bc4..146fde23fc 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -35,6 +35,7 @@ #include "sysemu/kvm.h" #include "sysemu/dma.h" #include "sysemu/sysemu.h" +#include "sysemu/host_iommu_device.h" #include "hw/i386/apic_internal.h" #include "kvm/kvm_i386.h" #include "migration/vmstate.h" @@ -3819,6 +3820,25 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s, PCIBus *bus, return vtd_dev_as; } +static bool vtd_check_hdev(IntelIOMMUState *s, VTDHostIOMMUDevice *vtd_hdev, + Error **errp) +{ + HostIOMMUDevice *hiod = vtd_hdev->dev; + int ret; + + /* Common checks */ + ret = host_iommu_device_get_cap(hiod, HOST_IOMMU_DEVICE_CAP_AW_BITS, errp); + if (ret < 0) { + return false; + } + if (s->aw_bits > ret) { + error_setg(errp, "aw-bits %d > host aw-bits %d", s->aw_bits, ret); + return false; + } + + return true; +} + static bool vtd_dev_set_iommu_device(PCIBus *bus, void *opaque, int devfn, HostIOMMUDevice *hiod, Error **errp) { @@ -3848,6 +3868,12 @@ static bool vtd_dev_set_iommu_device(PCIBus *bus, void *opaque, int devfn, vtd_hdev->iommu_state = s; vtd_hdev->dev = hiod; + if (!vtd_check_hdev(s, vtd_hdev, errp)) { + g_free(vtd_hdev); + vtd_iommu_unlock(s); + return false; + } + new_key = g_malloc(sizeof(*new_key)); new_key->bus = bus; new_key->devfn = devfn;