From patchwork Tue Jul 16 09:45:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 13734236 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 A19D2C3DA49 for ; Tue, 16 Jul 2024 09:47:39 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sTelm-00062A-JV; Tue, 16 Jul 2024 05:46:50 -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 1sTelk-0005tg-Pn for qemu-devel@nongnu.org; Tue, 16 Jul 2024 05:46:48 -0400 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 1sTelj-0000Nb-6c for qemu-devel@nongnu.org; Tue, 16 Jul 2024 05:46:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1721123205; 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=yRrR9cB41kizellih51J2f8d4SksCr5ITTCJbWBauUY=; b=Wz8b3SYTn//lNUDgHC3DfTaOPnfUx97WYK/no1oehQXTz4kNlhkuM0sfjj6BwKoifYLogy Mvjk91Lbj5xHdbKtqQ5XwVcHdLea4oluKlTAklHOPVY1tDYULsbevpOrAoTzRo11qaA3JW lxHhzKyjz1JO3XVx6TFYpeplnnxFrCQ= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-427-uvo_IKcLNuGhf9qru8ralg-1; Tue, 16 Jul 2024 05:46:44 -0400 X-MC-Unique: uvo_IKcLNuGhf9qru8ralg-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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 mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id D2529195608A; Tue, 16 Jul 2024 09:46:42 +0000 (UTC) Received: from laptop.redhat.com (unknown [10.39.192.185]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id E186B3000183; Tue, 16 Jul 2024 09:46:38 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, mst@redhat.com, jean-philippe@linaro.org, peter.maydell@linaro.org, clg@redhat.com, zhenzhong.duan@intel.com, alex.williamson@redhat.com, jasowang@redhat.com Cc: yanghliu@redhat.com Subject: [PATCH 3/6] virtio-iommu: Free [host_]resv_ranges on unset_iommu_devices Date: Tue, 16 Jul 2024 11:45:05 +0200 Message-ID: <20240716094619.1713905-4-eric.auger@redhat.com> In-Reply-To: <20240716094619.1713905-1-eric.auger@redhat.com> References: <20240716094619.1713905-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 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: 12 X-Spam_score: 1.2 X-Spam_bar: + X-Spam_report: (1.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_SBL_CSS=3.335, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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 We are currently missing the deallocation of the [host_]resv_regions in case of hot unplug. Also to make things more simple let's rule out the case where multiple HostIOMMUDevices would be aliased and attached to the same IOMMUDevice. This allows to remove the handling of conflicting Host reserved regions. Anyway this is not properly supported at guest kernel level. On hotunplug the reserved regions are reset to the ones set by virtio-iommu property. Signed-off-by: Eric Auger Reviewed-by: Cédric Le Goater Reviewed-by: Zhenzhong Duan --- hw/virtio/virtio-iommu.c | 62 ++++++++++++++++++---------------------- 1 file changed, 28 insertions(+), 34 deletions(-) diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index 2c54c0d976..2de41ab412 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -538,8 +538,6 @@ static int virtio_iommu_set_host_iova_ranges(VirtIOIOMMU *s, PCIBus *bus, { IOMMUPciBus *sbus = g_hash_table_lookup(s->as_by_busptr, bus); IOMMUDevice *sdev; - GList *current_ranges; - GList *l, *tmp, *new_ranges = NULL; int ret = -EINVAL; if (!sbus) { @@ -553,33 +551,10 @@ static int virtio_iommu_set_host_iova_ranges(VirtIOIOMMU *s, PCIBus *bus, return ret; } - current_ranges = sdev->host_resv_ranges; - - /* check that each new resv region is included in an existing one */ if (sdev->host_resv_ranges) { - range_inverse_array(iova_ranges, - &new_ranges, - 0, UINT64_MAX); - - for (tmp = new_ranges; tmp; tmp = tmp->next) { - Range *newr = (Range *)tmp->data; - bool included = false; - - for (l = current_ranges; l; l = l->next) { - Range * r = (Range *)l->data; - - if (range_contains_range(r, newr)) { - included = true; - break; - } - } - if (!included) { - goto error; - } - } - /* all new reserved ranges are included in existing ones */ - ret = 0; - goto out; + error_setg(errp, "%s virtio-iommu does not support aliased BDF", + __func__); + return ret; } range_inverse_array(iova_ranges, @@ -588,14 +563,31 @@ static int virtio_iommu_set_host_iova_ranges(VirtIOIOMMU *s, PCIBus *bus, rebuild_resv_regions(sdev); return 0; -error: - error_setg(errp, "%s Conflicting host reserved ranges set!", - __func__); -out: - g_list_free_full(new_ranges, g_free); - return ret; } +static void virtio_iommu_unset_host_iova_ranges(VirtIOIOMMU *s, PCIBus *bus, + int devfn) +{ + IOMMUPciBus *sbus = g_hash_table_lookup(s->as_by_busptr, bus); + IOMMUDevice *sdev; + + if (!sbus) { + return; + } + + sdev = sbus->pbdev[devfn]; + if (!sdev) { + return; + } + + g_list_free_full(g_steal_pointer(&sdev->host_resv_ranges), g_free); + g_list_free_full(sdev->resv_regions, g_free); + sdev->host_resv_ranges = NULL; + sdev->resv_regions = NULL; + add_prop_resv_regions(sdev); +} + + static bool check_page_size_mask(VirtIOIOMMU *viommu, uint64_t new_mask, Error **errp) { @@ -704,6 +696,8 @@ virtio_iommu_unset_iommu_device(PCIBus *bus, void *opaque, int devfn) if (!hiod) { return; } + virtio_iommu_unset_host_iova_ranges(viommu, hiod->aliased_bus, + hiod->aliased_devfn); g_hash_table_remove(viommu->host_iommu_devices, &key); }