16c915ba42
The Linux kernel already has a virtio-rng driver, this is the device implementation. When the guest asks for entropy from the virtio hwrng, it puts a buffer in the vq. We then put entropy into that buffer, and push it back to the guest. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> --- aliguori: converted to new RngBackend interface aliguori: remove entropy needed event aliguori: fix migration
103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/*
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* QEMU S390x VirtIO BUS definitions
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*
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* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "virtio-blk.h"
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#include "virtio-net.h"
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#include "virtio-rng.h"
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#include "virtio-serial.h"
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#include "virtio-scsi.h"
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#define VIRTIO_DEV_OFFS_TYPE 0 /* 8 bits */
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#define VIRTIO_DEV_OFFS_NUM_VQ 1 /* 8 bits */
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#define VIRTIO_DEV_OFFS_FEATURE_LEN 2 /* 8 bits */
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#define VIRTIO_DEV_OFFS_CONFIG_LEN 3 /* 8 bits */
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#define VIRTIO_DEV_OFFS_STATUS 4 /* 8 bits */
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#define VIRTIO_DEV_OFFS_CONFIG 5 /* dynamic */
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#define VIRTIO_VQCONFIG_OFFS_TOKEN 0 /* 64 bits */
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#define VIRTIO_VQCONFIG_OFFS_ADDRESS 8 /* 64 bits */
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#define VIRTIO_VQCONFIG_OFFS_NUM 16 /* 16 bits */
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#define VIRTIO_VQCONFIG_LEN 24
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#define VIRTIO_RING_LEN (TARGET_PAGE_SIZE * 3)
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#define VIRTIO_VRING_AVAIL_IDX_OFFS 2
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#define VIRTIO_VRING_USED_IDX_OFFS 2
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#define S390_DEVICE_PAGES 512
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#define VIRTIO_PARAM_MASK 0xff
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#define VIRTIO_PARAM_VRING_INTERRUPT 0x0
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#define VIRTIO_PARAM_CONFIG_CHANGED 0x1
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#define VIRTIO_PARAM_DEV_ADD 0x2
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#define TYPE_VIRTIO_S390_DEVICE "virtio-s390-device"
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#define VIRTIO_S390_DEVICE(obj) \
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OBJECT_CHECK(VirtIOS390Device, (obj), TYPE_VIRTIO_S390_DEVICE)
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#define VIRTIO_S390_DEVICE_CLASS(klass) \
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OBJECT_CLASS_CHECK(VirtIOS390DeviceClass, (klass), TYPE_VIRTIO_S390_DEVICE)
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#define VIRTIO_S390_DEVICE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(VirtIOS390DeviceClass, (obj), TYPE_VIRTIO_S390_DEVICE)
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#define TYPE_S390_VIRTIO_BUS "s390-virtio-bus"
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#define S390_VIRTIO_BUS(obj) \
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OBJECT_CHECK(VirtIOS390Bus, (obj), TYPE_S390_VIRTIO_BUS)
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typedef struct VirtIOS390Device VirtIOS390Device;
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typedef struct VirtIOS390DeviceClass {
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DeviceClass qdev;
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int (*init)(VirtIOS390Device *dev);
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} VirtIOS390DeviceClass;
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struct VirtIOS390Device {
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DeviceState qdev;
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ram_addr_t dev_offs;
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ram_addr_t feat_offs;
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uint8_t feat_len;
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VirtIODevice *vdev;
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VirtIOBlkConf blk;
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NICConf nic;
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uint32_t host_features;
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virtio_serial_conf serial;
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virtio_net_conf net;
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VirtIOSCSIConf scsi;
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VirtIORNGConf rng;
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};
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typedef struct VirtIOS390Bus {
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BusState bus;
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VirtIOS390Device *console;
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ram_addr_t dev_page;
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ram_addr_t dev_offs;
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ram_addr_t next_ring;
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} VirtIOS390Bus;
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void s390_virtio_device_update_status(VirtIOS390Device *dev);
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VirtIOS390Device *s390_virtio_bus_console(VirtIOS390Bus *bus);
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VirtIOS390Bus *s390_virtio_bus_init(ram_addr_t *ram_size);
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VirtIOS390Device *s390_virtio_bus_find_vring(VirtIOS390Bus *bus,
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ram_addr_t mem, int *vq_num);
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VirtIOS390Device *s390_virtio_bus_find_mem(VirtIOS390Bus *bus, ram_addr_t mem);
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void s390_virtio_device_sync(VirtIOS390Device *dev);
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void s390_virtio_reset_idx(VirtIOS390Device *dev);
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