virtio-iommu: Add skeleton
This patchs adds the skeleton for the virtio-iommu device. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <20200214132745.23392-2-eric.auger@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Eric Auger
Michael S. Tsirkin
parent
abdd16f468
commit
22c37a10f3
@ -9,6 +9,11 @@ config VIRTIO_RNG
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default y
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depends on VIRTIO
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config VIRTIO_IOMMU
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bool
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default y
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depends on VIRTIO
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config VIRTIO_PCI
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bool
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default y if PCI_DEVICES
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@ -16,6 +16,7 @@ obj-$(call land,$(CONFIG_VIRTIO_CRYPTO),$(CONFIG_VIRTIO_PCI)) += virtio-crypto-p
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obj-$(CONFIG_VIRTIO_PMEM) += virtio-pmem.o
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common-obj-$(call land,$(CONFIG_VIRTIO_PMEM),$(CONFIG_VIRTIO_PCI)) += virtio-pmem-pci.o
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obj-$(call land,$(CONFIG_VHOST_USER_FS),$(CONFIG_VIRTIO_PCI)) += vhost-user-fs-pci.o
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obj-$(CONFIG_VIRTIO_IOMMU) += virtio-iommu.o
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obj-$(CONFIG_VHOST_VSOCK) += vhost-vsock.o
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ifeq ($(CONFIG_VIRTIO_PCI),y)
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@ -53,3 +53,10 @@ virtio_mmio_write_offset(uint64_t offset, uint64_t value) "virtio_mmio_write off
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virtio_mmio_guest_page(uint64_t size, int shift) "guest page size 0x%" PRIx64 " shift %d"
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virtio_mmio_queue_write(uint64_t value, int max_size) "mmio_queue write 0x%" PRIx64 " max %d"
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virtio_mmio_setting_irq(int level) "virtio_mmio setting IRQ %d"
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# hw/virtio/virtio-iommu.c
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virtio_iommu_device_reset(void) "reset!"
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virtio_iommu_get_features(uint64_t features) "device supports features=0x%"PRIx64
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virtio_iommu_device_status(uint8_t status) "driver status = %d"
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virtio_iommu_get_config(uint64_t page_size_mask, uint64_t start, uint64_t end, uint32_t domain_range, uint32_t probe_size) "page_size_mask=0x%"PRIx64" start=0x%"PRIx64" end=0x%"PRIx64" domain_range=%d probe_size=0x%x"
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virtio_iommu_set_config(uint64_t page_size_mask, uint64_t start, uint64_t end, uint32_t domain_range, uint32_t probe_size) "page_size_mask=0x%"PRIx64" start=0x%"PRIx64" end=0x%"PRIx64" domain_bits=%d probe_size=0x%x"
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265
hw/virtio/virtio-iommu.c
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265
hw/virtio/virtio-iommu.c
Normal file
@ -0,0 +1,265 @@
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/*
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* virtio-iommu device
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*
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* Copyright (c) 2020 Red Hat, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2 or later, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "qemu/osdep.h"
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#include "qemu/iov.h"
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#include "qemu-common.h"
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#include "hw/qdev-properties.h"
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#include "hw/virtio/virtio.h"
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#include "sysemu/kvm.h"
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#include "trace.h"
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#include "standard-headers/linux/virtio_ids.h"
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#include "hw/virtio/virtio-bus.h"
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#include "hw/virtio/virtio-access.h"
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#include "hw/virtio/virtio-iommu.h"
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/* Max size */
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#define VIOMMU_DEFAULT_QUEUE_SIZE 256
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static int virtio_iommu_handle_attach(VirtIOIOMMU *s,
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struct iovec *iov,
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unsigned int iov_cnt)
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{
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return VIRTIO_IOMMU_S_UNSUPP;
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}
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static int virtio_iommu_handle_detach(VirtIOIOMMU *s,
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struct iovec *iov,
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unsigned int iov_cnt)
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{
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return VIRTIO_IOMMU_S_UNSUPP;
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}
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static int virtio_iommu_handle_map(VirtIOIOMMU *s,
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struct iovec *iov,
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unsigned int iov_cnt)
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{
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return VIRTIO_IOMMU_S_UNSUPP;
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}
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static int virtio_iommu_handle_unmap(VirtIOIOMMU *s,
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struct iovec *iov,
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unsigned int iov_cnt)
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{
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return VIRTIO_IOMMU_S_UNSUPP;
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}
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static void virtio_iommu_handle_command(VirtIODevice *vdev, VirtQueue *vq)
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{
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VirtIOIOMMU *s = VIRTIO_IOMMU(vdev);
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struct virtio_iommu_req_head head;
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struct virtio_iommu_req_tail tail = {};
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VirtQueueElement *elem;
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unsigned int iov_cnt;
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struct iovec *iov;
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size_t sz;
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for (;;) {
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elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
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if (!elem) {
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return;
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}
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if (iov_size(elem->in_sg, elem->in_num) < sizeof(tail) ||
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iov_size(elem->out_sg, elem->out_num) < sizeof(head)) {
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virtio_error(vdev, "virtio-iommu bad head/tail size");
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virtqueue_detach_element(vq, elem, 0);
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g_free(elem);
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break;
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}
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iov_cnt = elem->out_num;
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iov = elem->out_sg;
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sz = iov_to_buf(iov, iov_cnt, 0, &head, sizeof(head));
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if (unlikely(sz != sizeof(head))) {
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tail.status = VIRTIO_IOMMU_S_DEVERR;
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goto out;
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}
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qemu_mutex_lock(&s->mutex);
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switch (head.type) {
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case VIRTIO_IOMMU_T_ATTACH:
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tail.status = virtio_iommu_handle_attach(s, iov, iov_cnt);
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break;
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case VIRTIO_IOMMU_T_DETACH:
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tail.status = virtio_iommu_handle_detach(s, iov, iov_cnt);
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break;
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case VIRTIO_IOMMU_T_MAP:
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tail.status = virtio_iommu_handle_map(s, iov, iov_cnt);
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break;
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case VIRTIO_IOMMU_T_UNMAP:
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tail.status = virtio_iommu_handle_unmap(s, iov, iov_cnt);
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break;
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default:
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tail.status = VIRTIO_IOMMU_S_UNSUPP;
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}
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qemu_mutex_unlock(&s->mutex);
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out:
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sz = iov_from_buf(elem->in_sg, elem->in_num, 0,
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&tail, sizeof(tail));
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assert(sz == sizeof(tail));
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virtqueue_push(vq, elem, sizeof(tail));
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virtio_notify(vdev, vq);
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g_free(elem);
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}
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}
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static void virtio_iommu_get_config(VirtIODevice *vdev, uint8_t *config_data)
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{
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VirtIOIOMMU *dev = VIRTIO_IOMMU(vdev);
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struct virtio_iommu_config *config = &dev->config;
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trace_virtio_iommu_get_config(config->page_size_mask,
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config->input_range.start,
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config->input_range.end,
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config->domain_range.end,
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config->probe_size);
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memcpy(config_data, &dev->config, sizeof(struct virtio_iommu_config));
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}
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static void virtio_iommu_set_config(VirtIODevice *vdev,
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const uint8_t *config_data)
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{
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struct virtio_iommu_config config;
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memcpy(&config, config_data, sizeof(struct virtio_iommu_config));
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trace_virtio_iommu_set_config(config.page_size_mask,
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config.input_range.start,
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config.input_range.end,
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config.domain_range.end,
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config.probe_size);
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}
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static uint64_t virtio_iommu_get_features(VirtIODevice *vdev, uint64_t f,
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Error **errp)
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{
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VirtIOIOMMU *dev = VIRTIO_IOMMU(vdev);
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f |= dev->features;
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trace_virtio_iommu_get_features(f);
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return f;
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}
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/*
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* Migration is not yet supported: most of the state consists
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* of balanced binary trees which are not yet ready for getting
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* migrated
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*/
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static const VMStateDescription vmstate_virtio_iommu_device = {
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.name = "virtio-iommu-device",
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.unmigratable = 1,
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};
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static void virtio_iommu_device_realize(DeviceState *dev, Error **errp)
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{
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VirtIODevice *vdev = VIRTIO_DEVICE(dev);
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VirtIOIOMMU *s = VIRTIO_IOMMU(dev);
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virtio_init(vdev, "virtio-iommu", VIRTIO_ID_IOMMU,
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sizeof(struct virtio_iommu_config));
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s->req_vq = virtio_add_queue(vdev, VIOMMU_DEFAULT_QUEUE_SIZE,
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virtio_iommu_handle_command);
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s->event_vq = virtio_add_queue(vdev, VIOMMU_DEFAULT_QUEUE_SIZE, NULL);
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s->config.page_size_mask = TARGET_PAGE_MASK;
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s->config.input_range.end = -1UL;
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s->config.domain_range.end = 32;
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virtio_add_feature(&s->features, VIRTIO_RING_F_EVENT_IDX);
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virtio_add_feature(&s->features, VIRTIO_RING_F_INDIRECT_DESC);
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virtio_add_feature(&s->features, VIRTIO_F_VERSION_1);
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virtio_add_feature(&s->features, VIRTIO_IOMMU_F_INPUT_RANGE);
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virtio_add_feature(&s->features, VIRTIO_IOMMU_F_DOMAIN_RANGE);
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virtio_add_feature(&s->features, VIRTIO_IOMMU_F_MAP_UNMAP);
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virtio_add_feature(&s->features, VIRTIO_IOMMU_F_BYPASS);
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virtio_add_feature(&s->features, VIRTIO_IOMMU_F_MMIO);
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qemu_mutex_init(&s->mutex);
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}
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static void virtio_iommu_device_unrealize(DeviceState *dev, Error **errp)
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{
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VirtIODevice *vdev = VIRTIO_DEVICE(dev);
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virtio_cleanup(vdev);
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}
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static void virtio_iommu_device_reset(VirtIODevice *vdev)
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{
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trace_virtio_iommu_device_reset();
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}
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static void virtio_iommu_set_status(VirtIODevice *vdev, uint8_t status)
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{
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trace_virtio_iommu_device_status(status);
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}
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static void virtio_iommu_instance_init(Object *obj)
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{
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}
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static const VMStateDescription vmstate_virtio_iommu = {
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.name = "virtio-iommu",
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.minimum_version_id = 1,
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.version_id = 1,
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.fields = (VMStateField[]) {
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VMSTATE_VIRTIO_DEVICE,
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VMSTATE_END_OF_LIST()
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},
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};
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static Property virtio_iommu_properties[] = {
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DEFINE_PROP_LINK("primary-bus", VirtIOIOMMU, primary_bus, "PCI", PCIBus *),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void virtio_iommu_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
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device_class_set_props(dc, virtio_iommu_properties);
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dc->vmsd = &vmstate_virtio_iommu;
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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vdc->realize = virtio_iommu_device_realize;
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vdc->unrealize = virtio_iommu_device_unrealize;
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vdc->reset = virtio_iommu_device_reset;
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vdc->get_config = virtio_iommu_get_config;
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vdc->set_config = virtio_iommu_set_config;
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vdc->get_features = virtio_iommu_get_features;
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vdc->set_status = virtio_iommu_set_status;
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vdc->vmsd = &vmstate_virtio_iommu_device;
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}
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static const TypeInfo virtio_iommu_info = {
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.name = TYPE_VIRTIO_IOMMU,
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.parent = TYPE_VIRTIO_DEVICE,
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.instance_size = sizeof(VirtIOIOMMU),
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.instance_init = virtio_iommu_instance_init,
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.class_init = virtio_iommu_class_init,
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};
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static void virtio_register_types(void)
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{
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type_register_static(&virtio_iommu_info);
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}
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type_init(virtio_register_types)
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57
include/hw/virtio/virtio-iommu.h
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57
include/hw/virtio/virtio-iommu.h
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@ -0,0 +1,57 @@
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/*
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* virtio-iommu device
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*
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* Copyright (c) 2020 Red Hat, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2 or later, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef QEMU_VIRTIO_IOMMU_H
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#define QEMU_VIRTIO_IOMMU_H
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#include "standard-headers/linux/virtio_iommu.h"
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#include "hw/virtio/virtio.h"
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#include "hw/pci/pci.h"
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#define TYPE_VIRTIO_IOMMU "virtio-iommu-device"
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#define VIRTIO_IOMMU(obj) \
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OBJECT_CHECK(VirtIOIOMMU, (obj), TYPE_VIRTIO_IOMMU)
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typedef struct IOMMUDevice {
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void *viommu;
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PCIBus *bus;
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int devfn;
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IOMMUMemoryRegion iommu_mr;
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AddressSpace as;
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} IOMMUDevice;
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typedef struct IOMMUPciBus {
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PCIBus *bus;
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IOMMUDevice *pbdev[0]; /* Parent array is sparse, so dynamically alloc */
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} IOMMUPciBus;
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typedef struct VirtIOIOMMU {
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VirtIODevice parent_obj;
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VirtQueue *req_vq;
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VirtQueue *event_vq;
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struct virtio_iommu_config config;
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uint64_t features;
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GHashTable *as_by_busptr;
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PCIBus *primary_bus;
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GTree *domains;
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QemuMutex mutex;
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GTree *endpoints;
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} VirtIOIOMMU;
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#endif
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