From patchwork Fri Mar 25 02:13:29 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 601893 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3qWRkZ5Q8Qz9sC3 for ; Fri, 25 Mar 2016 13:16:38 +1100 (AEDT) Received: from localhost ([::1]:53733 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ajHIi-0001hK-PT for incoming@patchwork.ozlabs.org; Thu, 24 Mar 2016 22:16:36 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50577) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ajHGB-0005cb-P1 for qemu-devel@nongnu.org; Thu, 24 Mar 2016 22:14:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ajHG9-0008Gi-Bx for qemu-devel@nongnu.org; Thu, 24 Mar 2016 22:13:59 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34992) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ajHG8-0008GW-TH for qemu-devel@nongnu.org; Thu, 24 Mar 2016 22:13:57 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (Postfix) with ESMTPS id 9CA7E804EB; Fri, 25 Mar 2016 02:13:56 +0000 (UTC) Received: from jason-ThinkPad-T430s.redhat.com (vpn1-7-152.pek2.redhat.com [10.72.7.152]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u2P2DUX7032064; Thu, 24 Mar 2016 22:13:53 -0400 From: Jason Wang To: mst@redhat.com, qemu-devel@nongnu.org Date: Fri, 25 Mar 2016 10:13:29 +0800 Message-Id: <1458872009-13342-9-git-send-email-jasowang@redhat.com> In-Reply-To: <1458872009-13342-1-git-send-email-jasowang@redhat.com> References: <1458872009-13342-1-git-send-email-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: cornelia.huck@de.ibm.com, pbonzini@redhat.com, Jason Wang , peterx@redhat.com Subject: [Qemu-devel] [RFC PATCH 8/8] vhost_net: device IOTLB support X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 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 This patches implements Device IOTLB support for vhost kernel. This is done through: 1) switch to use dma helpers when map/unmap vrings from vhost codes 2) kernel support for Device IOTLB API: - allow vhost-net to query the IOMMU IOTLB entry through eventfd - enable the ability for qemu to update a specified mapping of vhost - through ioctl. - enable the ability to invalidate a specified range of iova for the device IOTLB of vhost through ioctl. In x86/intel_iommu case this is triggered through iommu memory region notifier from device IOTLB invalidation descriptor processing routine. With all the above, kernel vhost_net can co-operate with IOMMU. Cc: Michael S. Tsirkin Signed-off-by: Jason Wang --- hw/virtio/vhost-backend.c | 33 +++++++ hw/virtio/vhost.c | 203 +++++++++++++++++++++++++++++++++----- include/hw/virtio/vhost-backend.h | 14 +++ include/hw/virtio/vhost.h | 6 ++ include/hw/virtio/virtio-access.h | 22 +++++ linux-headers/linux/vhost.h | 35 +++++++ 6 files changed, 290 insertions(+), 23 deletions(-) diff --git a/hw/virtio/vhost-backend.c b/hw/virtio/vhost-backend.c index b358902..a1e4848 100644 --- a/hw/virtio/vhost-backend.c +++ b/hw/virtio/vhost-backend.c @@ -167,6 +167,35 @@ static int vhost_kernel_get_vq_index(struct vhost_dev *dev, int idx) return idx - dev->vq_index; } +static int vhost_kernel_set_vring_iotlb_request(struct vhost_dev *dev, + struct + vhost_vring_iotlb_entry + *entry) +{ + int r = vhost_kernel_call(dev, VHOST_SET_VRING_IOTLB_REQUEST, entry); + return r; +} + +static int vhost_kernel_update_iotlb(struct vhost_dev *dev, + struct vhost_iotlb_entry *entry) +{ + int r = vhost_kernel_call(dev, VHOST_UPDATE_IOTLB, entry); + return r; +} + +static int vhost_kernel_run_iotlb(struct vhost_dev *dev, + int *enabled) +{ + int r = vhost_kernel_call(dev, VHOST_RUN_IOTLB, enabled); + return r; +} + +static int vhost_kernel_set_vring_iotlb_call(struct vhost_dev *dev, + struct vhost_vring_file *file) +{ + return vhost_kernel_call(dev, VHOST_SET_VRING_IOTLB_CALL, file); +} + static const VhostOps kernel_ops = { .backend_type = VHOST_BACKEND_TYPE_KERNEL, .vhost_backend_init = vhost_kernel_init, @@ -190,6 +219,10 @@ static const VhostOps kernel_ops = { .vhost_set_owner = vhost_kernel_set_owner, .vhost_reset_device = vhost_kernel_reset_device, .vhost_get_vq_index = vhost_kernel_get_vq_index, + .vhost_set_vring_iotlb_request = vhost_kernel_set_vring_iotlb_request, + .vhost_update_iotlb = vhost_kernel_update_iotlb, + .vhost_set_vring_iotlb_call = vhost_kernel_set_vring_iotlb_call, + .vhost_run_iotlb = vhost_kernel_run_iotlb, }; int vhost_set_backend_type(struct vhost_dev *dev, VhostBackendType backend_type) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 392d848..653b210 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -22,6 +22,7 @@ #include "qemu/memfd.h" #include #include "exec/address-spaces.h" +#include "exec/ram_addr.h" #include "hw/virtio/virtio-bus.h" #include "hw/virtio/virtio-access.h" #include "migration/migration.h" @@ -407,6 +408,7 @@ static int vhost_verify_ring_mappings(struct vhost_dev *dev, uint64_t start_addr, uint64_t size) { + #if 0 int i; int r = 0; @@ -419,7 +421,7 @@ static int vhost_verify_ring_mappings(struct vhost_dev *dev, continue; } l = vq->ring_size; - p = cpu_physical_memory_map(vq->ring_phys, &l, 1); + p = virtio_memory_map(dev->vdev, vq->ring_phys, &l, 1); if (!p || l != vq->ring_size) { fprintf(stderr, "Unable to map ring buffer for ring %d\n", i); r = -ENOMEM; @@ -428,9 +430,11 @@ static int vhost_verify_ring_mappings(struct vhost_dev *dev, fprintf(stderr, "Ring buffer relocated for ring %d\n", i); r = -EBUSY; } - cpu_physical_memory_unmap(p, l, 0, 0); + virtio_memory_unmap(dev->vdev, p, l, 0, 0); } return r; + #endif + return 0; } static struct vhost_memory_region *vhost_dev_find_reg(struct vhost_dev *dev, @@ -662,6 +666,22 @@ static int vhost_dev_set_features(struct vhost_dev *dev, bool enable_log) return r < 0 ? -errno : 0; } +static int vhost_dev_update_iotlb(struct vhost_dev *dev, + struct vhost_iotlb_entry *entry) +{ + int r; + r = dev->vhost_ops->vhost_update_iotlb(dev, entry); + return r < 0 ? -errno : 0; +} + +static int vhost_run_iotlb(struct vhost_dev *dev, + int *enabled) +{ + int r; + r = dev->vhost_ops->vhost_run_iotlb(dev, enabled); + return r < 0 ? -errno : 0; +} + static int vhost_dev_set_log(struct vhost_dev *dev, bool enable_log) { int r, t, i, idx; @@ -798,6 +818,73 @@ static int vhost_virtqueue_set_vring_endian_legacy(struct vhost_dev *dev, return -errno; } +static int vhost_memory_region_lookup(struct vhost_dev *hdev, + __u64 gpa, __u64 *uaddr, __u64 *len) +{ + int i; + + for (i = 0; i < hdev->mem->nregions; i++) { + struct vhost_memory_region *reg = hdev->mem->regions + i; + + if (gpa >= reg->guest_phys_addr && + reg->guest_phys_addr + reg->memory_size > gpa) { + *uaddr = reg->userspace_addr + gpa - reg->guest_phys_addr; + *len = reg->guest_phys_addr + reg->memory_size - gpa; + return 0; + } + } + + return -EFAULT; +} + +static void vhost_device_iotlb_request(void *opaque) +{ + IOMMUTLBEntry iotlb; + struct vhost_virtqueue *vq = opaque; + struct vhost_dev *hdev = vq->dev; + struct vhost_iotlb_entry *request = vq->iotlb_req; + struct vhost_iotlb_entry reply = *request; + + rcu_read_lock(); + + event_notifier_test_and_clear(&vq->iotlb_notifier); + + reply.flags.type = VHOST_IOTLB_UPDATE; + reply.flags.valid = VHOST_IOTLB_INVALID; + + if (request->flags.type != VHOST_IOTLB_MISS) { + goto done; + } + + iotlb = address_space_get_iotlb_entry(virtio_get_dma_as(hdev->vdev), + request->iova, + false); + if (iotlb.target_as != NULL) { + if (vhost_memory_region_lookup(hdev, iotlb.translated_addr, + &reply.userspace_addr, + &reply.size)) { + goto done; + } + reply.iova = reply.iova & ~iotlb.addr_mask; + reply.size = MIN(iotlb.addr_mask + 1, reply.size); + if (iotlb.perm == IOMMU_RO) { + reply.flags.perm = VHOST_ACCESS_RO; + } else if (iotlb.perm == IOMMU_WO) { + reply.flags.perm = VHOST_ACCESS_WO; + } else if (iotlb.perm == IOMMU_RW) { + reply.flags.perm = VHOST_ACCESS_RW; + } else { + fprintf(stderr, "unknown iotlb perm!\n"); + } + reply.flags.type = VHOST_IOTLB_UPDATE; + reply.flags.valid = VHOST_IOTLB_VALID; + } + +done: + vhost_dev_update_iotlb(hdev, &reply); + rcu_read_unlock(); +} + static int vhost_virtqueue_start(struct vhost_dev *dev, struct VirtIODevice *vdev, struct vhost_virtqueue *vq, @@ -838,21 +925,21 @@ static int vhost_virtqueue_start(struct vhost_dev *dev, s = l = virtio_queue_get_desc_size(vdev, idx); a = virtio_queue_get_desc_addr(vdev, idx); - vq->desc = cpu_physical_memory_map(a, &l, 0); + vq->desc = virtio_memory_map(vdev, a, &l, 0); if (!vq->desc || l != s) { r = -ENOMEM; goto fail_alloc_desc; } s = l = virtio_queue_get_avail_size(vdev, idx); a = virtio_queue_get_avail_addr(vdev, idx); - vq->avail = cpu_physical_memory_map(a, &l, 0); + vq->avail = virtio_memory_map(vdev, a, &l, 0); if (!vq->avail || l != s) { r = -ENOMEM; goto fail_alloc_avail; } vq->used_size = s = l = virtio_queue_get_used_size(vdev, idx); vq->used_phys = a = virtio_queue_get_used_addr(vdev, idx); - vq->used = cpu_physical_memory_map(a, &l, 1); + vq->used = virtio_memory_map(vdev, a, &l, 1); if (!vq->used || l != s) { r = -ENOMEM; goto fail_alloc_used; @@ -860,7 +947,7 @@ static int vhost_virtqueue_start(struct vhost_dev *dev, vq->ring_size = s = l = virtio_queue_get_ring_size(vdev, idx); vq->ring_phys = a = virtio_queue_get_ring_addr(vdev, idx); - vq->ring = cpu_physical_memory_map(a, &l, 1); + vq->ring = virtio_memory_map(vdev, a, &l, 1); if (!vq->ring || l != s) { r = -ENOMEM; goto fail_alloc_ring; @@ -891,20 +978,19 @@ static int vhost_virtqueue_start(struct vhost_dev *dev, } return 0; - fail_kick: fail_alloc: - cpu_physical_memory_unmap(vq->ring, virtio_queue_get_ring_size(vdev, idx), - 0, 0); + virtio_memory_unmap(vdev, vq->ring, virtio_queue_get_ring_size(vdev, idx), + 0, 0); fail_alloc_ring: - cpu_physical_memory_unmap(vq->used, virtio_queue_get_used_size(vdev, idx), - 0, 0); + virtio_memory_unmap(vdev, vq->used, virtio_queue_get_used_size(vdev, idx), + 0, 0); fail_alloc_used: - cpu_physical_memory_unmap(vq->avail, virtio_queue_get_avail_size(vdev, idx), - 0, 0); + virtio_memory_unmap(vdev, vq->avail, virtio_queue_get_avail_size(vdev, idx), + 0, 0); fail_alloc_avail: - cpu_physical_memory_unmap(vq->desc, virtio_queue_get_desc_size(vdev, idx), - 0, 0); + virtio_memory_unmap(vdev, vq->desc, virtio_queue_get_desc_size(vdev, idx), + 0, 0); fail_alloc_desc: return r; } @@ -941,14 +1027,14 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev, } assert (r >= 0); - cpu_physical_memory_unmap(vq->ring, virtio_queue_get_ring_size(vdev, idx), - 0, virtio_queue_get_ring_size(vdev, idx)); - cpu_physical_memory_unmap(vq->used, virtio_queue_get_used_size(vdev, idx), - 1, virtio_queue_get_used_size(vdev, idx)); - cpu_physical_memory_unmap(vq->avail, virtio_queue_get_avail_size(vdev, idx), - 0, virtio_queue_get_avail_size(vdev, idx)); - cpu_physical_memory_unmap(vq->desc, virtio_queue_get_desc_size(vdev, idx), - 0, virtio_queue_get_desc_size(vdev, idx)); + virtio_memory_unmap(vdev, vq->ring, virtio_queue_get_ring_size(vdev, idx), + 0, virtio_queue_get_ring_size(vdev, idx)); + virtio_memory_unmap(vdev, vq->used, virtio_queue_get_used_size(vdev, idx), + 1, virtio_queue_get_used_size(vdev, idx)); + virtio_memory_unmap(vdev, vq->avail, virtio_queue_get_avail_size(vdev, idx), + 0, virtio_queue_get_avail_size(vdev, idx)); + virtio_memory_unmap(vdev, vq->desc, virtio_queue_get_desc_size(vdev, idx), + 0, virtio_queue_get_desc_size(vdev, idx)); } static void vhost_eventfd_add(MemoryListener *listener, @@ -970,6 +1056,9 @@ static int vhost_virtqueue_init(struct vhost_dev *dev, struct vhost_vring_file file = { .index = vhost_vq_index, }; + struct vhost_vring_iotlb_entry request = { + .index = vhost_vq_index, + }; int r = event_notifier_init(&vq->masked_notifier, 0); if (r < 0) { return r; @@ -981,7 +1070,37 @@ static int vhost_virtqueue_init(struct vhost_dev *dev, r = -errno; goto fail_call; } + + r = event_notifier_init(&vq->iotlb_notifier, 0); + if (r < 0) { + r = -errno; + goto fail_call; + } + + file.fd = event_notifier_get_fd(&vq->iotlb_notifier); + r = dev->vhost_ops->vhost_set_vring_iotlb_call(dev, &file); + if (r) { + r = -errno; + goto fail_iotlb; + } + qemu_set_fd_handler(event_notifier_get_fd(&vq->iotlb_notifier), + vhost_device_iotlb_request, NULL, vq); + + vq->iotlb_req = g_malloc0(sizeof(*vq->iotlb_req)); + request.userspace_addr = (uint64_t)(unsigned long)vq->iotlb_req; + r = dev->vhost_ops->vhost_set_vring_iotlb_request(dev, &request); + if (r) { + r = -errno; + goto fail_req; + } + + vq->dev = dev; + return 0; +fail_req: + qemu_set_fd_handler(file.fd, NULL, NULL, NULL); +fail_iotlb: + event_notifier_cleanup(&vq->iotlb_notifier); fail_call: event_notifier_cleanup(&vq->masked_notifier); return r; @@ -989,7 +1108,24 @@ fail_call: static void vhost_virtqueue_cleanup(struct vhost_virtqueue *vq) { + qemu_set_fd_handler(event_notifier_get_fd(&vq->iotlb_notifier), + NULL, NULL, NULL); event_notifier_cleanup(&vq->masked_notifier); + event_notifier_cleanup(&vq->iotlb_notifier); + g_free(vq->iotlb_req); +} + +static void vhost_iommu_unmap_notify(Notifier *n, void *data) +{ + struct vhost_dev *hdev = container_of(n, struct vhost_dev, n); + IOMMUTLBEntry *iotlb = data; + struct vhost_iotlb_entry inv = { + .flags.type = VHOST_IOTLB_INVALIDATE, + .iova = iotlb->iova, + .size = iotlb->addr_mask + 1, + }; + + vhost_dev_update_iotlb(hdev, &inv); } int vhost_dev_init(struct vhost_dev *hdev, void *opaque, @@ -998,6 +1134,7 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque, uint64_t features; int i, r; + hdev->vdev = NULL; hdev->migration_blocker = NULL; if (vhost_set_backend_type(hdev, backend_type) < 0) { @@ -1052,6 +1189,8 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque, .priority = 10 }; + hdev->n.notify = vhost_iommu_unmap_notify; + if (hdev->migration_blocker == NULL) { if (!(hdev->features & (0x1ULL << VHOST_F_LOG_ALL))) { error_setg(&hdev->migration_blocker, @@ -1231,6 +1370,10 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) if (r < 0) { goto fail_features; } + + memory_region_register_iommu_notifier(virtio_get_dma_as(vdev)->root, + &hdev->n); + r = hdev->vhost_ops->vhost_set_mem_table(hdev, hdev->mem); if (r < 0) { r = -errno; @@ -1262,7 +1405,18 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) } } + /* FIXME: conditionally */ + r = vhost_run_iotlb(hdev, NULL); + if (r < 0) { + goto fail_iotlb; + } + + hdev->vdev = vdev; return 0; +fail_iotlb: + if (hdev->vhost_ops->vhost_set_vring_enable) { + hdev->vhost_ops->vhost_set_vring_enable(hdev, 0); + } fail_log: vhost_log_put(hdev, false); fail_vq: @@ -1273,6 +1427,7 @@ fail_vq: hdev->vq_index + i); } i = hdev->nvqs; + fail_mem: fail_features: @@ -1292,9 +1447,11 @@ void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev) hdev->vq_index + i); } + memory_region_unregister_iommu_notifier(&hdev->n); vhost_log_put(hdev, true); hdev->started = false; hdev->log = NULL; hdev->log_size = 0; + hdev->vdev = NULL; } diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-backend.h index 95fcc96..db2931c 100644 --- a/include/hw/virtio/vhost-backend.h +++ b/include/hw/virtio/vhost-backend.h @@ -22,9 +22,11 @@ typedef enum VhostBackendType { struct vhost_dev; struct vhost_log; struct vhost_memory; +struct vhost_iotlb_entry; struct vhost_vring_file; struct vhost_vring_state; struct vhost_vring_addr; +struct vhost_vring_iotlb_entry; struct vhost_scsi_target; typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque); @@ -72,6 +74,14 @@ typedef int (*vhost_migration_done_op)(struct vhost_dev *dev, typedef bool (*vhost_backend_can_merge_op)(struct vhost_dev *dev, uint64_t start1, uint64_t size1, uint64_t start2, uint64_t size2); +typedef int (*vhost_set_vring_iotlb_request_op)(struct vhost_dev *dev, + struct vhost_vring_iotlb_entry *entry); +typedef int (*vhost_update_iotlb_op)(struct vhost_dev *dev, + struct vhost_iotlb_entry *entry); +typedef int (*vhost_set_vring_iotlb_call_op)(struct vhost_dev *dev, + struct vhost_vring_file *file); +typedef int (*vhost_run_iotlb_op)(struct vhost_dev *dev, + int *enalbed); typedef struct VhostOps { VhostBackendType backend_type; @@ -100,6 +110,10 @@ typedef struct VhostOps { vhost_requires_shm_log_op vhost_requires_shm_log; vhost_migration_done_op vhost_migration_done; vhost_backend_can_merge_op vhost_backend_can_merge; + vhost_set_vring_iotlb_request_op vhost_set_vring_iotlb_request; + vhost_update_iotlb_op vhost_update_iotlb; + vhost_set_vring_iotlb_call_op vhost_set_vring_iotlb_call; + vhost_run_iotlb_op vhost_run_iotlb; } VhostOps; extern const VhostOps user_ops; diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index b60d758..60d0706 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -20,6 +20,9 @@ struct vhost_virtqueue { unsigned long long ring_phys; unsigned ring_size; EventNotifier masked_notifier; + EventNotifier iotlb_notifier; + struct vhost_iotlb_entry *iotlb_req; + struct vhost_dev *dev; }; typedef unsigned long vhost_log_chunk_t; @@ -36,7 +39,9 @@ struct vhost_log { }; struct vhost_memory; +struct vhost_iotlb_entry; struct vhost_dev { + VirtIODevice *vdev; MemoryListener memory_listener; struct vhost_memory *mem; int n_mem_sections; @@ -61,6 +66,7 @@ struct vhost_dev { void *opaque; struct vhost_log *log; QLIST_ENTRY(vhost_dev) entry; + Notifier n; }; int vhost_dev_init(struct vhost_dev *hdev, void *opaque, diff --git a/include/hw/virtio/virtio-access.h b/include/hw/virtio/virtio-access.h index 967cc75..6b4b45a 100644 --- a/include/hw/virtio/virtio-access.h +++ b/include/hw/virtio/virtio-access.h @@ -16,6 +16,7 @@ #define _QEMU_VIRTIO_ACCESS_H #include "hw/virtio/virtio.h" #include "hw/virtio/virtio-bus.h" +#include "sysemu/dma.h" #include "exec/address-spaces.h" static inline AddressSpace *virtio_get_dma_as(VirtIODevice *vdev) @@ -193,4 +194,25 @@ static inline void virtio_tswap64s(VirtIODevice *vdev, uint64_t *s) { *s = virtio_tswap64(vdev, *s); } + +static inline void *virtio_memory_map(VirtIODevice *vdev, hwaddr addr, + hwaddr *plen, int is_write) +{ + AddressSpace *dma_as = virtio_get_dma_as(vdev); + + return dma_memory_map(dma_as, addr, plen, is_write ? + DMA_DIRECTION_FROM_DEVICE : DMA_DIRECTION_TO_DEVICE); +} + +static inline void virtio_memory_unmap(VirtIODevice *vdev, void *buffer, + hwaddr len, int is_write, + hwaddr access_len) +{ + AddressSpace *dma_as = virtio_get_dma_as(vdev); + + dma_memory_unmap(dma_as, buffer, len, is_write ? + DMA_DIRECTION_FROM_DEVICE : DMA_DIRECTION_TO_DEVICE, + access_len); +} + #endif /* _QEMU_VIRTIO_ACCESS_H */ diff --git a/linux-headers/linux/vhost.h b/linux-headers/linux/vhost.h index ead86db..0987c87 100644 --- a/linux-headers/linux/vhost.h +++ b/linux-headers/linux/vhost.h @@ -27,6 +27,32 @@ struct vhost_vring_file { }; +struct vhost_iotlb_entry { + __u64 iova; + __u64 size; + __u64 userspace_addr; + struct { +#define VHOST_ACCESS_RO 0x1 +#define VHOST_ACCESS_WO 0x2 +#define VHOST_ACCESS_RW 0x3 + __u8 perm; +#define VHOST_IOTLB_MISS 1 +#define VHOST_IOTLB_UPDATE 2 +#define VHOST_IOTLB_INVALIDATE 3 + __u8 type; +#define VHOST_IOTLB_INVALID 0x1 +#define VHOST_IOTLB_VALID 0x2 + __u8 valid; + __u8 u8_padding; + __u32 padding; + } flags; +}; + +struct vhost_vring_iotlb_entry { + unsigned int index; + __u64 userspace_addr; +}; + struct vhost_vring_addr { unsigned int index; /* Option flags. */ @@ -127,6 +153,15 @@ struct vhost_memory { /* Set eventfd to signal an error */ #define VHOST_SET_VRING_ERR _IOW(VHOST_VIRTIO, 0x22, struct vhost_vring_file) +/* IOTLB */ +/* Specify an eventfd file descriptor to signle on IOTLB miss */ +#define VHOST_SET_VRING_IOTLB_CALL _IOW(VHOST_VIRTIO, 0x23, struct \ + vhost_vring_file) +#define VHOST_SET_VRING_IOTLB_REQUEST _IOW(VHOST_VIRTIO, 0x25, struct \ + vhost_vring_iotlb_entry) +#define VHOST_UPDATE_IOTLB _IOW(VHOST_VIRTIO, 0x24, struct vhost_iotlb_entry) +#define VHOST_RUN_IOTLB _IOW(VHOST_VIRTIO, 0x26, int) + /* VHOST_NET specific defines */ /* Attach virtio net ring to a raw socket, or tap device.