[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [RFC v2 3/8] virtio_iommu: add skeleton
From: |
Eric Auger |
Subject: |
[Qemu-devel] [RFC v2 3/8] virtio_iommu: add skeleton |
Date: |
Wed, 7 Jun 2017 18:01:22 +0200 |
This patchs adds the skeleton for the virtio-iommu device.
Signed-off-by: Eric Auger <address@hidden>
---
hw/virtio/Makefile.objs | 1 +
hw/virtio/virtio-iommu.c | 247 +++++++++++++++++++++++++++++++++++++++
include/hw/virtio/virtio-iommu.h | 60 ++++++++++
3 files changed, 308 insertions(+)
create mode 100644 hw/virtio/virtio-iommu.c
create mode 100644 include/hw/virtio/virtio-iommu.h
diff --git a/hw/virtio/Makefile.objs b/hw/virtio/Makefile.objs
index 765d363..8967a4a 100644
--- a/hw/virtio/Makefile.objs
+++ b/hw/virtio/Makefile.objs
@@ -6,6 +6,7 @@ common-obj-y += virtio-mmio.o
obj-y += virtio.o virtio-balloon.o
obj-$(CONFIG_LINUX) += vhost.o vhost-backend.o vhost-user.o
+obj-$(CONFIG_LINUX) += virtio-iommu.o
obj-$(CONFIG_VHOST_VSOCK) += vhost-vsock.o
obj-y += virtio-crypto.o
obj-$(CONFIG_VIRTIO_PCI) += virtio-crypto-pci.o
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
new file mode 100644
index 0000000..86129ef
--- /dev/null
+++ b/hw/virtio/virtio-iommu.c
@@ -0,0 +1,247 @@
+/*
+ * virtio-iommu device
+ *
+ * Copyright (c) 2017 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/iov.h"
+#include "qemu-common.h"
+#include "hw/virtio/virtio.h"
+#include "sysemu/kvm.h"
+#include "qapi-event.h"
+#include "trace.h"
+
+#include "standard-headers/linux/virtio_ids.h"
+#include <linux/virtio_iommu.h>
+
+#include "hw/virtio/virtio-bus.h"
+#include "hw/virtio/virtio-access.h"
+#include "hw/virtio/virtio-iommu.h"
+
+/* Max size */
+#define VIOMMU_DEFAULT_QUEUE_SIZE 256
+
+static int virtio_iommu_handle_attach(VirtIOIOMMU *s,
+ struct iovec *iov,
+ unsigned int iov_cnt)
+{
+ return -ENOENT;
+}
+static int virtio_iommu_handle_detach(VirtIOIOMMU *s,
+ struct iovec *iov,
+ unsigned int iov_cnt)
+{
+ return -ENOENT;
+}
+static int virtio_iommu_handle_map(VirtIOIOMMU *s,
+ struct iovec *iov,
+ unsigned int iov_cnt)
+{
+ return -ENOENT;
+}
+static int virtio_iommu_handle_unmap(VirtIOIOMMU *s,
+ struct iovec *iov,
+ unsigned int iov_cnt)
+{
+ return -ENOENT;
+}
+
+static void virtio_iommu_handle_command(VirtIODevice *vdev, VirtQueue *vq)
+{
+ VirtIOIOMMU *s = VIRTIO_IOMMU(vdev);
+ VirtQueueElement *elem;
+ struct virtio_iommu_req_head head;
+ struct virtio_iommu_req_tail tail;
+ unsigned int iov_cnt;
+ struct iovec *iov;
+ size_t sz;
+
+ for (;;) {
+ elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
+ if (!elem) {
+ return;
+ }
+
+ if (iov_size(elem->in_sg, elem->in_num) < sizeof(tail) ||
+ iov_size(elem->out_sg, elem->out_num) < sizeof(head)) {
+ virtio_error(vdev, "virtio-iommu erroneous head or tail");
+ virtqueue_detach_element(vq, elem, 0);
+ g_free(elem);
+ break;
+ }
+
+ iov_cnt = elem->out_num;
+ iov = g_memdup(elem->out_sg, sizeof(struct iovec) * elem->out_num);
+ sz = iov_to_buf(iov, iov_cnt, 0, &head, sizeof(head));
+ if (sz != sizeof(head)) {
+ tail.status = VIRTIO_IOMMU_S_UNSUPP;
+ }
+ qemu_mutex_lock(&s->mutex);
+ switch (head.type) {
+ case VIRTIO_IOMMU_T_ATTACH:
+ tail.status = virtio_iommu_handle_attach(s, iov, iov_cnt);
+ break;
+ case VIRTIO_IOMMU_T_DETACH:
+ tail.status = virtio_iommu_handle_detach(s, iov, iov_cnt);
+ break;
+ case VIRTIO_IOMMU_T_MAP:
+ tail.status = virtio_iommu_handle_map(s, iov, iov_cnt);
+ break;
+ case VIRTIO_IOMMU_T_UNMAP:
+ tail.status = virtio_iommu_handle_unmap(s, iov, iov_cnt);
+ break;
+ default:
+ tail.status = VIRTIO_IOMMU_S_UNSUPP;
+ }
+ qemu_mutex_unlock(&s->mutex);
+
+ sz = iov_from_buf(elem->in_sg, elem->in_num, 0,
+ &tail, sizeof(tail));
+ assert(sz == sizeof(tail));
+
+ virtqueue_push(vq, elem, sizeof(tail));
+ virtio_notify(vdev, vq);
+ g_free(elem);
+ }
+}
+
+static void virtio_iommu_get_config(VirtIODevice *vdev, uint8_t *config_data)
+{
+ VirtIOIOMMU *dev = VIRTIO_IOMMU(vdev);
+
+ memcpy(config_data, &dev->config, sizeof(struct virtio_iommu_config));
+}
+
+static void virtio_iommu_set_config(VirtIODevice *vdev,
+ const uint8_t *config_data)
+{
+ VirtIOIOMMU *dev = VIRTIO_IOMMU(vdev);
+ struct virtio_iommu_config config;
+
+ memcpy(&config, config_data, sizeof(struct virtio_iommu_config));
+
+ dev->config.page_sizes = le64_to_cpu(config.page_sizes);
+ dev->config.input_range.end = le64_to_cpu(config.input_range.end);
+}
+
+static uint64_t virtio_iommu_get_features(VirtIODevice *vdev, uint64_t f,
+ Error **errp)
+{
+ VirtIOIOMMU *dev = VIRTIO_IOMMU(vdev);
+ f |= dev->host_features;
+ virtio_add_feature(&f, VIRTIO_RING_F_EVENT_IDX);
+ virtio_add_feature(&f, VIRTIO_RING_F_INDIRECT_DESC);
+ virtio_add_feature(&f, VIRTIO_IOMMU_F_INPUT_RANGE);
+ return f;
+}
+
+static int virtio_iommu_post_load_device(void *opaque, int version_id)
+{
+ return 0;
+}
+
+static const VMStateDescription vmstate_virtio_iommu_device = {
+ .name = "virtio-iommu-device",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .post_load = virtio_iommu_post_load_device,
+ .fields = (VMStateField[]) {
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
+{
+ VirtIODevice *vdev = VIRTIO_DEVICE(dev);
+ VirtIOIOMMU *s = VIRTIO_IOMMU(dev);
+
+ virtio_init(vdev, "virtio-iommu", VIRTIO_ID_IOMMU,
+ sizeof(struct virtio_iommu_config));
+
+ s->vq = virtio_add_queue(vdev, VIOMMU_DEFAULT_QUEUE_SIZE,
+ virtio_iommu_handle_command);
+
+ s->config.page_sizes = ~((1ULL << 12) - 1);
+ s->config.input_range.end = -1UL;
+}
+
+static void virtio_iommu_device_unrealize(DeviceState *dev, Error **errp)
+{
+ VirtIODevice *vdev = VIRTIO_DEVICE(dev);
+
+ virtio_cleanup(vdev);
+}
+
+static void virtio_iommu_device_reset(VirtIODevice *vdev)
+{
+}
+
+static void virtio_iommu_set_status(VirtIODevice *vdev, uint8_t status)
+{
+}
+
+static void virtio_iommu_instance_init(Object *obj)
+{
+}
+
+static const VMStateDescription vmstate_virtio_iommu = {
+ .name = "virtio-iommu",
+ .minimum_version_id = 1,
+ .version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_VIRTIO_DEVICE,
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+static Property virtio_iommu_properties[] = {
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void virtio_iommu_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
+
+ dc->props = virtio_iommu_properties;
+ dc->vmsd = &vmstate_virtio_iommu;
+
+ set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+ vdc->realize = virtio_iommu_device_realize;
+ vdc->unrealize = virtio_iommu_device_unrealize;
+ vdc->reset = virtio_iommu_device_reset;
+ vdc->get_config = virtio_iommu_get_config;
+ vdc->set_config = virtio_iommu_set_config;
+ vdc->get_features = virtio_iommu_get_features;
+ vdc->set_status = virtio_iommu_set_status;
+ vdc->vmsd = &vmstate_virtio_iommu_device;
+}
+
+static const TypeInfo virtio_iommu_info = {
+ .name = TYPE_VIRTIO_IOMMU,
+ .parent = TYPE_VIRTIO_DEVICE,
+ .instance_size = sizeof(VirtIOIOMMU),
+ .instance_init = virtio_iommu_instance_init,
+ .class_init = virtio_iommu_class_init,
+};
+
+static void virtio_register_types(void)
+{
+ type_register_static(&virtio_iommu_info);
+}
+
+type_init(virtio_register_types)
diff --git a/include/hw/virtio/virtio-iommu.h b/include/hw/virtio/virtio-iommu.h
new file mode 100644
index 0000000..2259413
--- /dev/null
+++ b/include/hw/virtio/virtio-iommu.h
@@ -0,0 +1,60 @@
+/*
+ * virtio-iommu device
+ *
+ * Copyright (c) 2017 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef QEMU_VIRTIO_IOMMU_H
+#define QEMU_VIRTIO_IOMMU_H
+
+#include "standard-headers/linux/virtio_iommu.h"
+#include "hw/virtio/virtio.h"
+#include "hw/pci/pci.h"
+
+#define TYPE_VIRTIO_IOMMU "virtio-iommu-device"
+#define VIRTIO_IOMMU(obj) \
+ OBJECT_CHECK(VirtIOIOMMU, (obj), TYPE_VIRTIO_IOMMU)
+
+#define IOMMU_PCI_BUS_MAX 256
+#define IOMMU_PCI_DEVFN_MAX 256
+
+typedef struct IOMMUDevice {
+ void *viommu;
+ PCIBus *bus;
+ int devfn;
+ MemoryRegion iommu_mr;
+ AddressSpace as;
+} IOMMUDevice;
+
+typedef struct IOMMUPciBus {
+ PCIBus *bus;
+ IOMMUDevice *pbdev[0]; /* Parent array is sparse, so dynamically alloc */
+} IOMMUPciBus;
+
+typedef struct VirtIOIOMMU {
+ VirtIODevice parent_obj;
+ VirtQueue *vq;
+ struct virtio_iommu_config config;
+ MemoryRegionIOMMUOps iommu_ops;
+ uint32_t host_features;
+ GHashTable *as_by_busptr;
+ IOMMUPciBus *as_by_bus_num[IOMMU_PCI_BUS_MAX];
+ GTree *address_spaces;
+ QemuMutex mutex;
+ GTree *devices;
+} VirtIOIOMMU;
+
+#endif
--
2.5.5
- [Qemu-devel] [RFC v2 0/8] VIRTIO-IOMMU device, Eric Auger, 2017/06/07
- [Qemu-devel] [RFC v2 1/8] update-linux-headers: import virtio_iommu.h, Eric Auger, 2017/06/07
- [Qemu-devel] [RFC v2 2/8] linux-headers: Update for virtio-iommu, Eric Auger, 2017/06/07
- [Qemu-devel] [RFC v2 3/8] virtio_iommu: add skeleton,
Eric Auger <=
- [Qemu-devel] [RFC v2 5/8] virtio_iommu: Add the iommu regions, Eric Auger, 2017/06/07
- [Qemu-devel] [RFC v2 4/8] virtio-iommu: Decode the command payload, Eric Auger, 2017/06/07
- [Qemu-devel] [RFC v2 6/8] virtio-iommu: Implement the translation and commands, Eric Auger, 2017/06/07
- [Qemu-devel] [RFC v2 7/8] hw/arm/virt: Add 2.10 machine type, Eric Auger, 2017/06/07
- [Qemu-devel] [RFC v2 8/8] hw/arm/virt: Add virtio-iommu the virt board, Eric Auger, 2017/06/07
- Re: [Qemu-devel] [RFC v2 0/8] VIRTIO-IOMMU device, Bharat Bhushan, 2017/06/09