cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

virtio-blk.h (2257B)

      1/*
      2 * Virtio Block Device
      3 *
      4 * Copyright IBM, Corp. 2007
      5 *
      6 * Authors:
      7 *  Anthony Liguori   <aliguori@us.ibm.com>
      8 *
      9 * This work is licensed under the terms of the GNU GPL, version 2.  See
     10 * the COPYING file in the top-level directory.
     11 *
     12 */
     13
     14#ifndef QEMU_VIRTIO_BLK_H
     15#define QEMU_VIRTIO_BLK_H
     16
     17#include "standard-headers/linux/virtio_blk.h"
     18#include "hw/virtio/virtio.h"
     19#include "hw/block/block.h"
     20#include "sysemu/iothread.h"
     21#include "sysemu/block-backend.h"
     22#include "qom/object.h"
     23
     24#define TYPE_VIRTIO_BLK "virtio-blk-device"
     25OBJECT_DECLARE_SIMPLE_TYPE(VirtIOBlock, VIRTIO_BLK)
     26
     27/* This is the last element of the write scatter-gather list */
     28struct virtio_blk_inhdr
     29{
     30    unsigned char status;
     31};
     32
     33#define VIRTIO_BLK_AUTO_NUM_QUEUES UINT16_MAX
     34
     35struct VirtIOBlkConf
     36{
     37    BlockConf conf;
     38    IOThread *iothread;
     39    char *serial;
     40    uint32_t request_merging;
     41    uint16_t num_queues;
     42    uint16_t queue_size;
     43    bool seg_max_adjust;
     44    bool report_discard_granularity;
     45    uint32_t max_discard_sectors;
     46    uint32_t max_write_zeroes_sectors;
     47    bool x_enable_wce_if_config_wce;
     48};
     49
     50struct VirtIOBlockDataPlane;
     51
     52struct VirtIOBlockReq;
     53struct VirtIOBlock {
     54    VirtIODevice parent_obj;
     55    BlockBackend *blk;
     56    void *rq;
     57    QEMUBH *bh;
     58    VirtIOBlkConf conf;
     59    unsigned short sector_mask;
     60    bool original_wce;
     61    VMChangeStateEntry *change;
     62    bool dataplane_disabled;
     63    bool dataplane_started;
     64    struct VirtIOBlockDataPlane *dataplane;
     65    uint64_t host_features;
     66    size_t config_size;
     67};
     68
     69typedef struct VirtIOBlockReq {
     70    VirtQueueElement elem;
     71    int64_t sector_num;
     72    VirtIOBlock *dev;
     73    VirtQueue *vq;
     74    IOVDiscardUndo inhdr_undo;
     75    IOVDiscardUndo outhdr_undo;
     76    struct virtio_blk_inhdr *in;
     77    struct virtio_blk_outhdr out;
     78    QEMUIOVector qiov;
     79    size_t in_len;
     80    struct VirtIOBlockReq *next;
     81    struct VirtIOBlockReq *mr_next;
     82    BlockAcctCookie acct;
     83} VirtIOBlockReq;
     84
     85#define VIRTIO_BLK_MAX_MERGE_REQS 32
     86
     87typedef struct MultiReqBuffer {
     88    VirtIOBlockReq *reqs[VIRTIO_BLK_MAX_MERGE_REQS];
     89    unsigned int num_reqs;
     90    bool is_write;
     91} MultiReqBuffer;
     92
     93bool virtio_blk_handle_vq(VirtIOBlock *s, VirtQueue *vq);
     94void virtio_blk_process_queued_requests(VirtIOBlock *s, bool is_bh);
     95
     96#endif