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Tue, 30 Jul 2019 17:23:12 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH for-4.2 v10 09/15] virtio-iommu: Implement translate X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tn@semihalf.com, bharat.bhushan@nxp.com, peterx@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" This patch implements the translate callback Signed-off-by: Eric Auger --- v6 -> v7: - implemented bypass-mode v5 -> v6: - replace error_report by qemu_log_mask v4 -> v5: - check the device domain is not NULL - s/printf/error_report - set flags to IOMMU_NONE in case of all translation faults --- hw/virtio/trace-events | 1 + hw/virtio/virtio-iommu.c | 58 +++++++++++++++++++++++++++++++++++++++- 2 files changed, 58 insertions(+), 1 deletion(-) diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events index 25a71b0505..8257065159 100644 --- a/hw/virtio/trace-events +++ b/hw/virtio/trace-events @@ -74,3 +74,4 @@ virtio_iommu_put_domain(uint32_t domain_id) "Free domain= =3D%d" virtio_iommu_unmap_left_interval(uint64_t low, uint64_t high, uint64_t nex= t_low, uint64_t next_high) "Unmap left [0x%"PRIx64",0x%"PRIx64"], new inter= val=3D[0x%"PRIx64",0x%"PRIx64"]" virtio_iommu_unmap_right_interval(uint64_t low, uint64_t high, uint64_t ne= xt_low, uint64_t next_high) "Unmap right [0x%"PRIx64",0x%"PRIx64"], new int= erval=3D[0x%"PRIx64",0x%"PRIx64"]" virtio_iommu_unmap_inc_interval(uint64_t low, uint64_t high) "Unmap inc [0= x%"PRIx64",0x%"PRIx64"]" +virtio_iommu_translate_out(uint64_t virt_addr, uint64_t phys_addr, uint32_= t sid) "0x%"PRIx64" -> 0x%"PRIx64 " for sid=3D%d" diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index 4706b9da6e..a8de583f9a 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -464,19 +464,75 @@ static IOMMUTLBEntry virtio_iommu_translate(IOMMUMemo= ryRegion *mr, hwaddr addr, int iommu_idx) { IOMMUDevice *sdev =3D container_of(mr, IOMMUDevice, iommu_mr); + VirtIOIOMMU *s =3D sdev->viommu; uint32_t sid; + viommu_endpoint *ep; + viommu_mapping *mapping; + viommu_interval interval; + bool bypass_allowed; + + interval.low =3D addr; + interval.high =3D addr + 1; =20 IOMMUTLBEntry entry =3D { .target_as =3D &address_space_memory, .iova =3D addr, .translated_addr =3D addr, - .addr_mask =3D ~(hwaddr)0, + .addr_mask =3D (1 << ctz32(s->config.page_size_mask)) - 1, .perm =3D IOMMU_NONE, }; =20 + bypass_allowed =3D virtio_has_feature(s->acked_features, + VIRTIO_IOMMU_F_BYPASS); + sid =3D virtio_iommu_get_sid(sdev); =20 trace_virtio_iommu_translate(mr->parent_obj.name, sid, addr, flag); + qemu_mutex_lock(&s->mutex); + + ep =3D g_tree_lookup(s->endpoints, GUINT_TO_POINTER(sid)); + if (!ep) { + if (!bypass_allowed) { + error_report("%s sid=3D%d is not known!!", __func__, sid); + } else { + entry.perm =3D flag; + } + goto unlock; + } + + if (!ep->domain) { + if (!bypass_allowed) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s %02x:%02x.%01x not attached to any domain\n", + __func__, PCI_BUS_NUM(sid), + PCI_SLOT(sid), PCI_FUNC(sid)); + } else { + entry.perm =3D flag; + } + goto unlock; + } + + mapping =3D g_tree_lookup(ep->domain->mappings, (gpointer)(&interval)); + if (!mapping) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s no mapping for 0x%"PRIx64" for sid=3D%d\n", + __func__, addr, sid); + goto unlock; + } + + if (((flag & IOMMU_RO) && !(mapping->flags & VIRTIO_IOMMU_MAP_F_READ))= || + ((flag & IOMMU_WO) && !(mapping->flags & VIRTIO_IOMMU_MAP_F_WRITE)= )) { + qemu_log_mask(LOG_GUEST_ERROR, + "Permission error on 0x%"PRIx64"(%d): allowed=3D%d\n= ", + addr, flag, mapping->flags); + goto unlock; + } + entry.translated_addr =3D addr - mapping->virt_addr + mapping->phys_ad= dr; + entry.perm =3D flag; + trace_virtio_iommu_translate_out(addr, entry.translated_addr, sid); + +unlock: + qemu_mutex_unlock(&s->mutex); return entry; } =20 --=20 2.20.1