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 5922DC433F5 for ; Wed, 22 Dec 2021 07:08:27 +0000 (UTC) Received: from localhost ([::1]:58270 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mzvje-0004PN-BE for qemu-devel@archiver.kernel.org; Wed, 22 Dec 2021 02:08:26 -0500 Received: from eggs.gnu.org ([209.51.188.92]:57412) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mzvIh-0008Fc-RG for qemu-devel@nongnu.org; Wed, 22 Dec 2021 01:40:35 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:33217) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mzvIa-0003B9-Eu for qemu-devel@nongnu.org; Wed, 22 Dec 2021 01:40:34 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1640155226; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=GCsShkGNTOHYe/jzI4mAbQV4tOhTyhlj3BBfbJymxV8=; b=Y/7wSTokkyu/EBvtGkfWy8/J9Kk15hoEgJlT8VIELGQoEvCill3/nGFvimIsB/0A6VqPB6 n2ZbtNkswR5QvWVNIc2HuewA7LJqgfoVNFLVYtAGgXhn0YmnbJRy1bfHLqMoGW6G3DuhjV Xxwfqp7y7akWtCOlVMou0nGig834ICc= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-517-mtSbW_AOOwiwQ5RHwqc7jQ-1; Wed, 22 Dec 2021 01:40:23 -0500 X-MC-Unique: mtSbW_AOOwiwQ5RHwqc7jQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 306BF39381; Wed, 22 Dec 2021 06:40:22 +0000 (UTC) Received: from localhost.localdomain (ovpn-13-219.pek2.redhat.com [10.72.13.219]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9D8BB838F1; Wed, 22 Dec 2021 06:39:59 +0000 (UTC) From: Jason Wang To: mst@redhat.com, peterx@redhat.com Subject: [PATCH] intel-iommu: correctly check passthrough during translation Date: Wed, 22 Dec 2021 14:39:56 +0800 Message-Id: <20211222063956.2871-1-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Received-SPF: pass client-ip=170.10.129.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, DKIM_INVALID=0.1, DKIM_SIGNED=0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=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: , Cc: Jason Wang , yi.l.liu@intel.com, yi.y.sun@linux.intel.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" When scsalable mode is enabled, the passthrough more is not determined by the context entry but PASID entry, so switch to use the logic of vtd_dev_pt_enabled() to determine the passthrough mode in vtd_do_iommu_translate(). Signed-off-by: Jason Wang --- hw/i386/intel_iommu.c | 38 +++++++++++++++++++++++--------------- 1 file changed, 23 insertions(+), 15 deletions(-) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index f584449d8d..f346a82652 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -1512,11 +1512,29 @@ static int vtd_sync_shadow_page_table(VTDAddressSpace *vtd_as) * 1st-level translation or 2nd-level translation, it depends * on PGTT setting. */ -static bool vtd_dev_pt_enabled(VTDAddressSpace *as) +static bool vtd_dev_pt_enabled(IntelIOMMUState *s, VTDContextEntry *ce) +{ + VTDPASIDEntry pe; + int ret; + + if (s->root_scalable) { + ret = vtd_ce_get_rid2pasid_entry(s, ce, &pe); + if (ret) { + error_report_once("%s: vtd_ce_get_rid2pasid_entry error: %"PRId32, + __func__, ret); + return false; + } + return (VTD_PE_GET_TYPE(&pe) == VTD_SM_PASID_ENTRY_PT); + } + + return (vtd_ce_get_type(ce) == VTD_CONTEXT_TT_PASS_THROUGH); + +} + +static bool vtd_as_pt_enabled(VTDAddressSpace *as) { IntelIOMMUState *s; VTDContextEntry ce; - VTDPASIDEntry pe; int ret; assert(as); @@ -1534,17 +1552,7 @@ static bool vtd_dev_pt_enabled(VTDAddressSpace *as) return false; } - if (s->root_scalable) { - ret = vtd_ce_get_rid2pasid_entry(s, &ce, &pe); - if (ret) { - error_report_once("%s: vtd_ce_get_rid2pasid_entry error: %"PRId32, - __func__, ret); - return false; - } - return (VTD_PE_GET_TYPE(&pe) == VTD_SM_PASID_ENTRY_PT); - } - - return (vtd_ce_get_type(&ce) == VTD_CONTEXT_TT_PASS_THROUGH); + return vtd_dev_pt_enabled(s, &ce); } /* Return whether the device is using IOMMU translation. */ @@ -1556,7 +1564,7 @@ static bool vtd_switch_address_space(VTDAddressSpace *as) assert(as); - use_iommu = as->iommu_state->dmar_enabled && !vtd_dev_pt_enabled(as); + use_iommu = as->iommu_state->dmar_enabled && !vtd_as_pt_enabled(as); trace_vtd_switch_address_space(pci_bus_num(as->bus), VTD_PCI_SLOT(as->devfn), @@ -1749,7 +1757,7 @@ static bool vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus, * We don't need to translate for pass-through context entries. * Also, let's ignore IOTLB caching as well for PT devices. */ - if (vtd_ce_get_type(&ce) == VTD_CONTEXT_TT_PASS_THROUGH) { + if (vtd_dev_pt_enabled(s, &ce)) { entry->iova = addr & VTD_PAGE_MASK_4K; entry->translated_addr = entry->iova; entry->addr_mask = ~VTD_PAGE_MASK_4K; -- 2.25.1