cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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virtio-gpu-gl.c (4695B)

      1/*
      2 * Virtio GPU Device
      3 *
      4 * Copyright Red Hat, Inc. 2013-2014
      5 *
      6 * Authors:
      7 *     Dave Airlie <airlied@redhat.com>
      8 *     Gerd Hoffmann <kraxel@redhat.com>
      9 *
     10 * This work is licensed under the terms of the GNU GPL, version 2 or later.
     11 * See the COPYING file in the top-level directory.
     12 */
     13
     14#include "qemu/osdep.h"
     15#include "qemu/iov.h"
     16#include "qemu/module.h"
     17#include "qemu/error-report.h"
     18#include "qapi/error.h"
     19#include "sysemu/sysemu.h"
     20#include "hw/virtio/virtio.h"
     21#include "hw/virtio/virtio-gpu.h"
     22#include "hw/virtio/virtio-gpu-bswap.h"
     23#include "hw/virtio/virtio-gpu-pixman.h"
     24#include "hw/qdev-properties.h"
     25
     26#include <virglrenderer.h>
     27
     28static void virtio_gpu_gl_update_cursor_data(VirtIOGPU *g,
     29                                             struct virtio_gpu_scanout *s,
     30                                             uint32_t resource_id)
     31{
     32    uint32_t width, height;
     33    uint32_t pixels, *data;
     34
     35    data = virgl_renderer_get_cursor_data(resource_id, &width, &height);
     36    if (!data) {
     37        return;
     38    }
     39
     40    if (width != s->current_cursor->width ||
     41        height != s->current_cursor->height) {
     42        free(data);
     43        return;
     44    }
     45
     46    pixels = s->current_cursor->width * s->current_cursor->height;
     47    memcpy(s->current_cursor->data, data, pixels * sizeof(uint32_t));
     48    free(data);
     49}
     50
     51static void virtio_gpu_gl_flushed(VirtIOGPUBase *b)
     52{
     53    VirtIOGPU *g = VIRTIO_GPU(b);
     54
     55    virtio_gpu_process_cmdq(g);
     56}
     57
     58static void virtio_gpu_gl_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
     59{
     60    VirtIOGPU *g = VIRTIO_GPU(vdev);
     61    VirtIOGPUGL *gl = VIRTIO_GPU_GL(vdev);
     62    struct virtio_gpu_ctrl_command *cmd;
     63
     64    if (!virtio_queue_ready(vq)) {
     65        return;
     66    }
     67
     68    if (!gl->renderer_inited) {
     69        virtio_gpu_virgl_init(g);
     70        gl->renderer_inited = true;
     71    }
     72    if (gl->renderer_reset) {
     73        gl->renderer_reset = false;
     74        virtio_gpu_virgl_reset(g);
     75    }
     76
     77    cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
     78    while (cmd) {
     79        cmd->vq = vq;
     80        cmd->error = 0;
     81        cmd->finished = false;
     82        QTAILQ_INSERT_TAIL(&g->cmdq, cmd, next);
     83        cmd = virtqueue_pop(vq, sizeof(struct virtio_gpu_ctrl_command));
     84    }
     85
     86    virtio_gpu_process_cmdq(g);
     87    virtio_gpu_virgl_fence_poll(g);
     88}
     89
     90static void virtio_gpu_gl_reset(VirtIODevice *vdev)
     91{
     92    VirtIOGPU *g = VIRTIO_GPU(vdev);
     93    VirtIOGPUGL *gl = VIRTIO_GPU_GL(vdev);
     94
     95    virtio_gpu_reset(vdev);
     96
     97    /*
     98     * GL functions must be called with the associated GL context in main
     99     * thread, and when the renderer is unblocked.
    100     */
    101    if (gl->renderer_inited && !gl->renderer_reset) {
    102        virtio_gpu_virgl_reset_scanout(g);
    103        gl->renderer_reset = true;
    104    }
    105}
    106
    107static void virtio_gpu_gl_device_realize(DeviceState *qdev, Error **errp)
    108{
    109    VirtIOGPU *g = VIRTIO_GPU(qdev);
    110
    111#if defined(HOST_WORDS_BIGENDIAN)
    112    error_setg(errp, "virgl is not supported on bigendian platforms");
    113    return;
    114#endif
    115
    116    if (!object_resolve_path_type("", TYPE_VIRTIO_GPU_GL, NULL)) {
    117        error_setg(errp, "at most one %s device is permitted", TYPE_VIRTIO_GPU_GL);
    118        return;
    119    }
    120
    121    if (!display_opengl) {
    122        error_setg(errp, "opengl is not available");
    123        return;
    124    }
    125
    126    g->parent_obj.conf.flags |= (1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED);
    127    VIRTIO_GPU_BASE(g)->virtio_config.num_capsets =
    128        virtio_gpu_virgl_get_num_capsets(g);
    129
    130    virtio_gpu_device_realize(qdev, errp);
    131}
    132
    133static Property virtio_gpu_gl_properties[] = {
    134    DEFINE_PROP_BIT("stats", VirtIOGPU, parent_obj.conf.flags,
    135                    VIRTIO_GPU_FLAG_STATS_ENABLED, false),
    136    DEFINE_PROP_END_OF_LIST(),
    137};
    138
    139static void virtio_gpu_gl_class_init(ObjectClass *klass, void *data)
    140{
    141    DeviceClass *dc = DEVICE_CLASS(klass);
    142    VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
    143    VirtIOGPUBaseClass *vbc = VIRTIO_GPU_BASE_CLASS(klass);
    144    VirtIOGPUClass *vgc = VIRTIO_GPU_CLASS(klass);
    145
    146    vbc->gl_flushed = virtio_gpu_gl_flushed;
    147    vgc->handle_ctrl = virtio_gpu_gl_handle_ctrl;
    148    vgc->process_cmd = virtio_gpu_virgl_process_cmd;
    149    vgc->update_cursor_data = virtio_gpu_gl_update_cursor_data;
    150
    151    vdc->realize = virtio_gpu_gl_device_realize;
    152    vdc->reset = virtio_gpu_gl_reset;
    153    device_class_set_props(dc, virtio_gpu_gl_properties);
    154}
    155
    156static const TypeInfo virtio_gpu_gl_info = {
    157    .name = TYPE_VIRTIO_GPU_GL,
    158    .parent = TYPE_VIRTIO_GPU,
    159    .instance_size = sizeof(VirtIOGPUGL),
    160    .class_init = virtio_gpu_gl_class_init,
    161};
    162module_obj(TYPE_VIRTIO_GPU_GL);
    163
    164static void virtio_register_types(void)
    165{
    166    type_register_static(&virtio_gpu_gl_info);
    167}
    168
    169type_init(virtio_register_types)
    170
    171module_dep("hw-display-virtio-gpu");