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bh=RjPP19z/KvGMAKG0s3g3XiM7abjfQKXhB02y3pd5ND8=; b=Bx52wrT1K8CQ0mem3UHeKjxtlPNsBV74lQJLOZpm0WYmNkO0ZDr3mp7FYtRDQMRHNYKhaC yvceJ6K0dKUWkG8bzDJWyXkuU9GXwZQt4A3zk5kC4VqTOgBIhqszdrFUJaGf7ZpddHhGKH wQ7K+2c5ahsuOh985A1F3D7oJ6u3vLg= X-MC-Unique: zU0zkbqlMxSjAr_Elb1zGQ-1 From: Cindy Lu To: lulu@redhat.com, jasowang@redhat.com, mst@redhat.com Cc: qemu-devel@nongnu.org Subject: [PATCH v12 1/1] vhost-vdpa: add support for vIOMMU Date: Fri, 9 Dec 2022 21:08:05 +0800 Message-Id: <20221209130805.3614970-2-lulu@redhat.com> In-Reply-To: <20221209130805.3614970-1-lulu@redhat.com> References: <20221209130805.3614970-1-lulu@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.6 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=lulu@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, DKIM_INVALID=0.1, DKIM_SIGNED=0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1670591351736100003 Content-Type: text/plain; charset="utf-8" 1.Skip the check in vhost_vdpa_listener_skipped_section() while MR is IOMMU, Move this check to vhost_vdpa_iommu_map_notify() 2.Add support for vIOMMU. Add the new function to deal with iommu MR. - during iommu_region_add register a specific IOMMU notifier, and store all notifiers in a list. - during iommu_region_del, compare and delete the IOMMU notifier from the l= ist Verified in vp_vdpa and vdpa_sim_net driver Signed-off-by: Cindy Lu --- hw/virtio/vhost-vdpa.c | 162 ++++++++++++++++++++++++++++++--- include/hw/virtio/vhost-vdpa.h | 10 ++ 2 files changed, 161 insertions(+), 11 deletions(-) diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index 7468e44b87..2b3920c2a1 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -26,6 +26,7 @@ #include "cpu.h" #include "trace.h" #include "qapi/error.h" +#include "hw/virtio/virtio-access.h" =20 /* * Return one past the end of the end of section. Be careful with uint64_t @@ -60,15 +61,22 @@ static bool vhost_vdpa_listener_skipped_section(MemoryR= egionSection *section, iova_min, section->offset_within_address_space); return true; } + /* + * While using vIOMMU, Sometimes the section will be larger than iova_= max + * but the memory that actually mapping is smaller, So skip the check + * here. Will add the check in vhost_vdpa_iommu_map_notify, + *There is the real size that maps to the kernel + */ =20 - llend =3D vhost_vdpa_section_end(section); - if (int128_gt(llend, int128_make64(iova_max))) { - error_report("RAM section out of device range (max=3D0x%" PRIx64 - ", end addr=3D0x%" PRIx64 ")", - iova_max, int128_get64(llend)); - return true; + if (!memory_region_is_iommu(section->mr)) { + llend =3D vhost_vdpa_section_end(section); + if (int128_gt(llend, int128_make64(iova_max))) { + error_report("RAM section out of device range (max=3D0x%" PRIx= 64 + ", end addr=3D0x%" PRIx64 ")", + iova_max, int128_get64(llend)); + return true; + } } - return false; } =20 @@ -173,6 +181,115 @@ static void vhost_vdpa_listener_commit(MemoryListener= *listener) v->iotlb_batch_begin_sent =3D false; } =20 +static void vhost_vdpa_iommu_map_notify(IOMMUNotifier *n, IOMMUTLBEntry *i= otlb) +{ + struct vdpa_iommu *iommu =3D container_of(n, struct vdpa_iommu, n); + + hwaddr iova =3D iotlb->iova + iommu->iommu_offset; + struct vhost_vdpa *v =3D iommu->dev; + void *vaddr; + int ret; + Int128 llend; + + if (iotlb->target_as !=3D &address_space_memory) { + error_report("Wrong target AS \"%s\", only system memory is allowe= d", + iotlb->target_as->name ? iotlb->target_as->name : "no= ne"); + return; + } + RCU_READ_LOCK_GUARD(); + /* check if RAM section out of device range */ + llend =3D int128_add(int128_makes64(iotlb->addr_mask), int128_makes64(= iova)); + if (int128_gt(llend, int128_make64(v->iova_range.last))) { + error_report("RAM section out of device range (max=3D0x%" PRIx64 + ", end addr=3D0x%" PRIx64 ")", + v->iova_range.last, int128_get64(llend)); + return; + } + + vhost_vdpa_iotlb_batch_begin_once(v); + + if ((iotlb->perm & IOMMU_RW) !=3D IOMMU_NONE) { + bool read_only; + + if (!memory_get_xlat_addr(iotlb, &vaddr, NULL, &read_only, NULL)) { + return; + } + + ret =3D vhost_vdpa_dma_map(v, iova, iotlb->addr_mask + 1, vaddr, + read_only); + if (ret) { + error_report("vhost_vdpa_dma_map(%p, 0x%" HWADDR_PRIx ", " + "0x%" HWADDR_PRIx ", %p) =3D %d (%m)", + v, iova, iotlb->addr_mask + 1, vaddr, ret); + } + } else { + ret =3D vhost_vdpa_dma_unmap(v, iova, iotlb->addr_mask + 1); + if (ret) { + error_report("vhost_vdpa_dma_unmap(%p, 0x%" HWADDR_PRIx ", " + "0x%" HWADDR_PRIx ") =3D %d (%m)", + v, iova, iotlb->addr_mask + 1, ret); + } + } +} + +static void vhost_vdpa_iommu_region_add(MemoryListener *listener, + MemoryRegionSection *section) +{ + struct vhost_vdpa *v =3D container_of(listener, struct vhost_vdpa, lis= tener); + + struct vdpa_iommu *iommu; + Int128 end; + int iommu_idx; + IOMMUMemoryRegion *iommu_mr; + int ret; + + iommu_mr =3D IOMMU_MEMORY_REGION(section->mr); + + iommu =3D g_malloc0(sizeof(*iommu)); + end =3D int128_add(int128_make64(section->offset_within_region), + section->size); + end =3D int128_sub(end, int128_one()); + iommu_idx =3D memory_region_iommu_attrs_to_index(iommu_mr, + MEMTXATTRS_UNSPECIFIED); + iommu->iommu_mr =3D iommu_mr; + iommu_notifier_init(&iommu->n, vhost_vdpa_iommu_map_notify, + IOMMU_NOTIFIER_IOTLB_EVENTS, + section->offset_within_region, int128_get64(end), iommu_idx); + iommu->iommu_offset =3D section->offset_within_address_space - + section->offset_within_region; + iommu->dev =3D v; + + ret =3D memory_region_register_iommu_notifier(section->mr, &iommu->n, = NULL); + if (ret) { + g_free(iommu); + return; + } + + QLIST_INSERT_HEAD(&v->iommu_list, iommu, iommu_next); + memory_region_iommu_replay(iommu->iommu_mr, &iommu->n); + + return; +} + +static void vhost_vdpa_iommu_region_del(MemoryListener *listener, + MemoryRegionSection *section) +{ + struct vhost_vdpa *v =3D container_of(listener, struct vhost_vdpa, lis= tener); + + struct vdpa_iommu *iommu; + + QLIST_FOREACH(iommu, &v->iommu_list, iommu_next) + { + if (MEMORY_REGION(iommu->iommu_mr) =3D=3D section->mr && + iommu->n.start =3D=3D section->offset_within_region) { + memory_region_unregister_iommu_notifier(section->mr, &iommu->n= ); + QLIST_REMOVE(iommu, iommu_next); + g_free(iommu); + break; + } + } +} + static void vhost_vdpa_listener_region_add(MemoryListener *listener, MemoryRegionSection *section) { @@ -187,6 +304,10 @@ static void vhost_vdpa_listener_region_add(MemoryListe= ner *listener, v->iova_range.last)) { return; } + if (memory_region_is_iommu(section->mr)) { + vhost_vdpa_iommu_region_add(listener, section); + return; + } =20 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK= ) !=3D (section->offset_within_region & ~TARGET_PAGE_MASK))) { @@ -266,6 +387,9 @@ static void vhost_vdpa_listener_region_del(MemoryListen= er *listener, v->iova_range.last)) { return; } + if (memory_region_is_iommu(section->mr)) { + vhost_vdpa_iommu_region_del(listener, section); + } =20 if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK= ) !=3D (section->offset_within_region & ~TARGET_PAGE_MASK))) { @@ -276,7 +400,8 @@ static void vhost_vdpa_listener_region_del(MemoryListen= er *listener, iova =3D TARGET_PAGE_ALIGN(section->offset_within_address_space); llend =3D vhost_vdpa_section_end(section); =20 - trace_vhost_vdpa_listener_region_del(v, iova, int128_get64(llend)); + trace_vhost_vdpa_listener_region_del(v, iova, + int128_get64(int128_sub(llend, int128_one()))); =20 if (int128_ge(int128_make64(iova), llend)) { return; @@ -303,9 +428,24 @@ static void vhost_vdpa_listener_region_del(MemoryListe= ner *listener, vhost_iova_tree_remove(v->iova_tree, *result); } vhost_vdpa_iotlb_batch_begin_once(v); + /* + * The unmap ioctl doesn't accept a full 64-bit. need to check it + */ + if (int128_eq(llsize, int128_2_64())) { + llsize =3D int128_rshift(llsize, 1); + ret =3D vhost_vdpa_dma_unmap(v, iova, int128_get64(llsize)); + if (ret) { + error_report("vhost_vdpa_dma_unmap(%p, 0x%" HWADDR_PRIx ", " + "0x%" HWADDR_PRIx ") =3D %d (%m)", + v, iova, int128_get64(llsize), ret); + } + iova +=3D int128_get64(llsize); + } ret =3D vhost_vdpa_dma_unmap(v, iova, int128_get64(llsize)); if (ret) { - error_report("vhost_vdpa dma unmap error!"); + error_report("vhost_vdpa_dma_unmap(%p, 0x%" HWADDR_PRIx ", " + "0x%" HWADDR_PRIx ") =3D %d (%m)", + v, iova, int128_get64(llsize), ret); } =20 memory_region_unref(section->mr); @@ -597,7 +737,6 @@ static int vhost_vdpa_cleanup(struct vhost_dev *dev) v =3D dev->opaque; trace_vhost_vdpa_cleanup(dev, v); vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs); - memory_listener_unregister(&v->listener); vhost_vdpa_svq_cleanup(dev); =20 dev->opaque =3D NULL; @@ -1115,7 +1254,8 @@ static int vhost_vdpa_dev_start(struct vhost_dev *dev= , bool started) } =20 if (started) { - memory_listener_register(&v->listener, &address_space_memory); + memory_listener_register(&v->listener, dev->vdev->dma_as); + return vhost_vdpa_add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK); } else { vhost_vdpa_reset_device(dev); diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h index 1111d85643..0d5b2c9508 100644 --- a/include/hw/virtio/vhost-vdpa.h +++ b/include/hw/virtio/vhost-vdpa.h @@ -40,8 +40,18 @@ typedef struct vhost_vdpa { void *shadow_vq_ops_opaque; struct vhost_dev *dev; VhostVDPAHostNotifier notifier[VIRTIO_QUEUE_MAX]; + QLIST_HEAD(, vdpa_iommu) iommu_list; + IOMMUNotifier n; } VhostVDPA; =20 +typedef struct vdpa_iommu { + struct vhost_vdpa *dev; + IOMMUMemoryRegion *iommu_mr; + hwaddr iommu_offset; + IOMMUNotifier n; + QLIST_ENTRY(vdpa_iommu) iommu_next; +} VDPAIOMMUState; + int vhost_vdpa_dma_map(struct vhost_vdpa *v, hwaddr iova, hwaddr size, void *vaddr, bool readonly); int vhost_vdpa_dma_unmap(struct vhost_vdpa *v, hwaddr iova, hwaddr size); --=20 2.34.3