From patchwork Wed Jan 17 08:02:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 13521456 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 6075DC47422 for ; Wed, 17 Jan 2024 08:05:36 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rQ0ui-0002EE-3q; Wed, 17 Jan 2024 03:04:44 -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 1rQ0ud-000295-Vi for qemu-devel@nongnu.org; Wed, 17 Jan 2024 03:04:40 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rQ0ua-00033B-4h for qemu-devel@nongnu.org; Wed, 17 Jan 2024 03:04:39 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1705478670; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=w3CdxFmDkghBhZU+EeJss4FDl+MilK9UCJU2qsqidD0=; b=GpMn11dGBCGUSSfyNwgozyLcno+gmbZkBNF82LdcLwB750dxfFt8Ud4Fjmi8z1CVrpLWCG Im0+bDfu/KhooDSKLG31gKP+zHs9160euMOfE7rejnwmLYCLwZRTKXuBSZIoSHanbI0NnE itiyb3My8ji8qxYSkPKQPhXn5OtrMTI= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-479-kKPI23l6N-aYcSqG6ds7qQ-1; Wed, 17 Jan 2024 03:04:27 -0500 X-MC-Unique: kKPI23l6N-aYcSqG6ds7qQ-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 379383815F8D; Wed, 17 Jan 2024 08:04:27 +0000 (UTC) Received: from laptop.redhat.com (unknown [10.39.192.75]) by smtp.corp.redhat.com (Postfix) with ESMTP id C666BFFF3; Wed, 17 Jan 2024 08:04:24 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, jean-philippe@linaro.org, alex.williamson@redhat.com, peter.maydell@linaro.org, zhenzhong.duan@intel.com, peterx@redhat.com, yanghliu@redhat.com, pbonzini@redhat.com Cc: mst@redhat.com, clg@redhat.com Subject: [RFC 1/7] hw/pci: Introduce PCIIOMMUOps::set_host_iova_regions Date: Wed, 17 Jan 2024 09:02:05 +0100 Message-ID: <20240117080414.316890-2-eric.auger@redhat.com> In-Reply-To: <20240117080414.316890-1-eric.auger@redhat.com> References: <20240117080414.316890-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.5 Received-SPF: pass client-ip=170.10.129.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -38 X-Spam_score: -3.9 X-Spam_bar: --- X-Spam_report: (-3.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.806, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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 This new callback will be used to convey usable IOVA regions from VFIO-PCI devices to vIOMMUS (esp. virtio-iommu). The advantage is that this callback can be called very early, once the device has is known to be protected by a vIOMMU, after the get_address_space() has been called by the parent device. Current solution to convey IOVA regions relies on IOMMU MR callbacks but this requires an IOMMU MR to be connected with the VFIO-PCI device which generally comes with the enablement of the IOMMU MR (vIOMMU protection activated). The downside is that is comes pretty late and in case of virtio-iommu, after the probe. Signed-off-by: Eric Auger --- include/hw/pci/pci.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index fa6313aabc..63c018b35a 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -385,6 +385,21 @@ typedef struct PCIIOMMUOps { * @devfn: device and function number */ AddressSpace * (*get_address_space)(PCIBus *bus, void *opaque, int devfn); + + /** + * @set_host_iova_ranges: convey the usable iova ranges for a given device + * + * Optional callback which returns 0 on success or an error value if any + * should be called after @get_address_space() + * + * @bus: the #PCIBus being accessed. + * @opaque: the data passed to pci_setup_iommu(). + * @devfn: device and function number + * @iova_ranges: list of IOVA ranges usable by the device + * @errp: error handle + */ + int (*set_host_iova_ranges)(PCIBus *bus, void *opaque, int devfn, + GList *iova_ranges, Error **errp); } PCIIOMMUOps; AddressSpace *pci_device_iommu_address_space(PCIDevice *dev);