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Tsirkin" Subject: [PULL 22/42] virtio-iommu: Compute host reserved regions Date: Mon, 24 Jun 2024 23:24:36 +0200 Message-ID: <20240624212456.350919-23-clg@redhat.com> In-Reply-To: <20240624212456.350919-1-clg@redhat.com> References: <20240624212456.350919-1-clg@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.129.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: 10 X-Spam_score: 1.0 X-Spam_bar: + X-Spam_report: (1.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.207, 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, 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Eric Auger Compute the host reserved regions in virtio_iommu_set_iommu_device(). The usable IOVA regions are retrieved from the HostIOMMUDevice. The virtio_iommu_set_host_iova_ranges() helper turns usable regions into complementary reserved regions while testing the inclusion into existing ones. virtio_iommu_set_host_iova_ranges() reuse the implementation of virtio_iommu_set_iova_ranges() which will be removed in subsequent patches. rebuild_resv_regions() is just moved. Signed-off-by: Eric Auger Reviewed-by: Zhenzhong Duan Reviewed-by: Michael S. Tsirkin --- hw/virtio/virtio-iommu.c | 147 ++++++++++++++++++++++++++++++--------- 1 file changed, 113 insertions(+), 34 deletions(-) diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index 16c8ec3ca460a6d70e83b28787398f94dd16cc99..a4c0cceb65f2452de186da10be2f449ec45fe672 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -498,11 +498,108 @@ get_host_iommu_device(VirtIOIOMMU *viommu, PCIBus *bus, int devfn) { return g_hash_table_lookup(viommu->host_iommu_devices, &key); } +/** + * rebuild_resv_regions: rebuild resv regions with both the + * info of host resv ranges and property set resv ranges + */ +static int rebuild_resv_regions(IOMMUDevice *sdev) +{ + GList *l; + int i = 0; + + /* free the existing list and rebuild it from scratch */ + g_list_free_full(sdev->resv_regions, g_free); + sdev->resv_regions = NULL; + + /* First add host reserved regions if any, all tagged as RESERVED */ + for (l = sdev->host_resv_ranges; l; l = l->next) { + ReservedRegion *reg = g_new0(ReservedRegion, 1); + Range *r = (Range *)l->data; + + reg->type = VIRTIO_IOMMU_RESV_MEM_T_RESERVED; + range_set_bounds(®->range, range_lob(r), range_upb(r)); + sdev->resv_regions = resv_region_list_insert(sdev->resv_regions, reg); + trace_virtio_iommu_host_resv_regions(sdev->iommu_mr.parent_obj.name, i, + range_lob(®->range), + range_upb(®->range)); + i++; + } + /* + * then add higher priority reserved regions set by the machine + * through properties + */ + add_prop_resv_regions(sdev); + return 0; +} + +static int virtio_iommu_set_host_iova_ranges(VirtIOIOMMU *s, PCIBus *bus, + int devfn, GList *iova_ranges, + Error **errp) +{ + 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) { + error_report("%s no sbus", __func__); + } + + sdev = sbus->pbdev[devfn]; + + current_ranges = sdev->host_resv_ranges; + + g_assert(!sdev->probe_done); + + /* 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; + } + + range_inverse_array(iova_ranges, + &sdev->host_resv_ranges, + 0, UINT64_MAX); + 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 bool virtio_iommu_set_iommu_device(PCIBus *bus, void *opaque, int devfn, HostIOMMUDevice *hiod, Error **errp) { VirtIOIOMMU *viommu = opaque; + HostIOMMUDeviceClass *hiodc = HOST_IOMMU_DEVICE_GET_CLASS(hiod); struct hiod_key *new_key; + GList *host_iova_ranges = NULL; assert(hiod); @@ -511,12 +608,28 @@ static bool virtio_iommu_set_iommu_device(PCIBus *bus, void *opaque, int devfn, return false; } + if (hiodc->get_iova_ranges) { + int ret; + host_iova_ranges = hiodc->get_iova_ranges(hiod, errp); + if (!host_iova_ranges) { + return true; /* some old kernels may not support that capability */ + } + ret = virtio_iommu_set_host_iova_ranges(viommu, hiod->aliased_bus, + hiod->aliased_devfn, + host_iova_ranges, errp); + if (ret) { + g_list_free_full(host_iova_ranges, g_free); + return false; + } + } + new_key = g_malloc(sizeof(*new_key)); new_key->bus = bus; new_key->devfn = devfn; object_ref(hiod); g_hash_table_insert(viommu->host_iommu_devices, new_key, hiod); + g_list_free_full(host_iova_ranges, g_free); return true; } @@ -1238,40 +1351,6 @@ static int virtio_iommu_set_page_size_mask(IOMMUMemoryRegion *mr, return 0; } -/** - * rebuild_resv_regions: rebuild resv regions with both the - * info of host resv ranges and property set resv ranges - */ -static int rebuild_resv_regions(IOMMUDevice *sdev) -{ - GList *l; - int i = 0; - - /* free the existing list and rebuild it from scratch */ - g_list_free_full(sdev->resv_regions, g_free); - sdev->resv_regions = NULL; - - /* First add host reserved regions if any, all tagged as RESERVED */ - for (l = sdev->host_resv_ranges; l; l = l->next) { - ReservedRegion *reg = g_new0(ReservedRegion, 1); - Range *r = (Range *)l->data; - - reg->type = VIRTIO_IOMMU_RESV_MEM_T_RESERVED; - range_set_bounds(®->range, range_lob(r), range_upb(r)); - sdev->resv_regions = resv_region_list_insert(sdev->resv_regions, reg); - trace_virtio_iommu_host_resv_regions(sdev->iommu_mr.parent_obj.name, i, - range_lob(®->range), - range_upb(®->range)); - i++; - } - /* - * then add higher priority reserved regions set by the machine - * through properties - */ - add_prop_resv_regions(sdev); - return 0; -} - /** * virtio_iommu_set_iova_ranges: Conveys the usable IOVA ranges *