qemu/ui/spice-display.c
Gerd Hoffmann ab9509ccea spice: make sure we don't overflow ssd->buf
Related spice-only bug.  We have a fixed 16 MB buffer here, being
presented to the spice-server as qxl video memory in case spice is
used with a non-qxl card.  It's also used with qxl in vga mode.

When using display resolutions requiring more than 16 MB of memory we
are going to overflow that buffer.  In theory the guest can write,
indirectly via spice-server.  The spice-server clears the memory after
setting a new video mode though, triggering a segfault in the overflow
case, so qemu crashes before the guest has a chance to do something
evil.

Fix that by switching to dynamic allocation for the buffer.

CVE-2014-3615

Cc: qemu-stable@nongnu.org
Cc: secalert@redhat.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
2014-09-05 12:19:50 +02:00

777 lines
23 KiB
C

/*
* Copyright (C) 2010 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 or
* (at your option) version 3 of the License.
*
* This program is distributed in the hope that 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-common.h"
#include "ui/qemu-spice.h"
#include "qemu/timer.h"
#include "qemu/queue.h"
#include "monitor/monitor.h"
#include "ui/console.h"
#include "sysemu/sysemu.h"
#include "trace.h"
#include "ui/spice-display.h"
static int debug = 0;
static void GCC_FMT_ATTR(2, 3) dprint(int level, const char *fmt, ...)
{
va_list args;
if (level <= debug) {
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
}
}
int qemu_spice_rect_is_empty(const QXLRect* r)
{
return r->top == r->bottom || r->left == r->right;
}
void qemu_spice_rect_union(QXLRect *dest, const QXLRect *r)
{
if (qemu_spice_rect_is_empty(r)) {
return;
}
if (qemu_spice_rect_is_empty(dest)) {
*dest = *r;
return;
}
dest->top = MIN(dest->top, r->top);
dest->left = MIN(dest->left, r->left);
dest->bottom = MAX(dest->bottom, r->bottom);
dest->right = MAX(dest->right, r->right);
}
QXLCookie *qxl_cookie_new(int type, uint64_t io)
{
QXLCookie *cookie;
cookie = g_malloc0(sizeof(*cookie));
cookie->type = type;
cookie->io = io;
return cookie;
}
void qemu_spice_add_memslot(SimpleSpiceDisplay *ssd, QXLDevMemSlot *memslot,
qxl_async_io async)
{
trace_qemu_spice_add_memslot(ssd->qxl.id, memslot->slot_id,
memslot->virt_start, memslot->virt_end,
async);
if (async != QXL_SYNC) {
spice_qxl_add_memslot_async(&ssd->qxl, memslot,
(uintptr_t)qxl_cookie_new(QXL_COOKIE_TYPE_IO,
QXL_IO_MEMSLOT_ADD_ASYNC));
} else {
spice_qxl_add_memslot(&ssd->qxl, memslot);
}
}
void qemu_spice_del_memslot(SimpleSpiceDisplay *ssd, uint32_t gid, uint32_t sid)
{
trace_qemu_spice_del_memslot(ssd->qxl.id, gid, sid);
spice_qxl_del_memslot(&ssd->qxl, gid, sid);
}
void qemu_spice_create_primary_surface(SimpleSpiceDisplay *ssd, uint32_t id,
QXLDevSurfaceCreate *surface,
qxl_async_io async)
{
trace_qemu_spice_create_primary_surface(ssd->qxl.id, id, surface, async);
if (async != QXL_SYNC) {
spice_qxl_create_primary_surface_async(&ssd->qxl, id, surface,
(uintptr_t)qxl_cookie_new(QXL_COOKIE_TYPE_IO,
QXL_IO_CREATE_PRIMARY_ASYNC));
} else {
spice_qxl_create_primary_surface(&ssd->qxl, id, surface);
}
}
void qemu_spice_destroy_primary_surface(SimpleSpiceDisplay *ssd,
uint32_t id, qxl_async_io async)
{
trace_qemu_spice_destroy_primary_surface(ssd->qxl.id, id, async);
if (async != QXL_SYNC) {
spice_qxl_destroy_primary_surface_async(&ssd->qxl, id,
(uintptr_t)qxl_cookie_new(QXL_COOKIE_TYPE_IO,
QXL_IO_DESTROY_PRIMARY_ASYNC));
} else {
spice_qxl_destroy_primary_surface(&ssd->qxl, id);
}
}
void qemu_spice_wakeup(SimpleSpiceDisplay *ssd)
{
trace_qemu_spice_wakeup(ssd->qxl.id);
spice_qxl_wakeup(&ssd->qxl);
}
static void qemu_spice_create_one_update(SimpleSpiceDisplay *ssd,
QXLRect *rect)
{
SimpleSpiceUpdate *update;
QXLDrawable *drawable;
QXLImage *image;
QXLCommand *cmd;
int bw, bh;
struct timespec time_space;
pixman_image_t *dest;
trace_qemu_spice_create_update(
rect->left, rect->right,
rect->top, rect->bottom);
update = g_malloc0(sizeof(*update));
drawable = &update->drawable;
image = &update->image;
cmd = &update->ext.cmd;
bw = rect->right - rect->left;
bh = rect->bottom - rect->top;
update->bitmap = g_malloc(bw * bh * 4);
drawable->bbox = *rect;
drawable->clip.type = SPICE_CLIP_TYPE_NONE;
drawable->effect = QXL_EFFECT_OPAQUE;
drawable->release_info.id = (uintptr_t)(&update->ext);
drawable->type = QXL_DRAW_COPY;
drawable->surfaces_dest[0] = -1;
drawable->surfaces_dest[1] = -1;
drawable->surfaces_dest[2] = -1;
clock_gettime(CLOCK_MONOTONIC, &time_space);
/* time in milliseconds from epoch. */
drawable->mm_time = time_space.tv_sec * 1000
+ time_space.tv_nsec / 1000 / 1000;
drawable->u.copy.rop_descriptor = SPICE_ROPD_OP_PUT;
drawable->u.copy.src_bitmap = (uintptr_t)image;
drawable->u.copy.src_area.right = bw;
drawable->u.copy.src_area.bottom = bh;
QXL_SET_IMAGE_ID(image, QXL_IMAGE_GROUP_DEVICE, ssd->unique++);
image->descriptor.type = SPICE_IMAGE_TYPE_BITMAP;
image->bitmap.flags = QXL_BITMAP_DIRECT | QXL_BITMAP_TOP_DOWN;
image->bitmap.stride = bw * 4;
image->descriptor.width = image->bitmap.x = bw;
image->descriptor.height = image->bitmap.y = bh;
image->bitmap.data = (uintptr_t)(update->bitmap);
image->bitmap.palette = 0;
image->bitmap.format = SPICE_BITMAP_FMT_32BIT;
dest = pixman_image_create_bits(PIXMAN_x8r8g8b8, bw, bh,
(void *)update->bitmap, bw * 4);
pixman_image_composite(PIXMAN_OP_SRC, ssd->surface, NULL, ssd->mirror,
rect->left, rect->top, 0, 0,
rect->left, rect->top, bw, bh);
pixman_image_composite(PIXMAN_OP_SRC, ssd->mirror, NULL, dest,
rect->left, rect->top, 0, 0,
0, 0, bw, bh);
pixman_image_unref(dest);
cmd->type = QXL_CMD_DRAW;
cmd->data = (uintptr_t)drawable;
QTAILQ_INSERT_TAIL(&ssd->updates, update, next);
}
static void qemu_spice_create_update(SimpleSpiceDisplay *ssd)
{
static const int blksize = 32;
int blocks = (surface_width(ssd->ds) + blksize - 1) / blksize;
int dirty_top[blocks];
int y, yoff, x, xoff, blk, bw;
int bpp = surface_bytes_per_pixel(ssd->ds);
uint8_t *guest, *mirror;
if (qemu_spice_rect_is_empty(&ssd->dirty)) {
return;
};
if (ssd->surface == NULL) {
ssd->surface = pixman_image_ref(ssd->ds->image);
ssd->mirror = qemu_pixman_mirror_create(ssd->ds->format,
ssd->ds->image);
}
for (blk = 0; blk < blocks; blk++) {
dirty_top[blk] = -1;
}
guest = surface_data(ssd->ds);
mirror = (void *)pixman_image_get_data(ssd->mirror);
for (y = ssd->dirty.top; y < ssd->dirty.bottom; y++) {
yoff = y * surface_stride(ssd->ds);
for (x = ssd->dirty.left; x < ssd->dirty.right; x += blksize) {
xoff = x * bpp;
blk = x / blksize;
bw = MIN(blksize, ssd->dirty.right - x);
if (memcmp(guest + yoff + xoff,
mirror + yoff + xoff,
bw * bpp) == 0) {
if (dirty_top[blk] != -1) {
QXLRect update = {
.top = dirty_top[blk],
.bottom = y,
.left = x,
.right = x + bw,
};
qemu_spice_create_one_update(ssd, &update);
dirty_top[blk] = -1;
}
} else {
if (dirty_top[blk] == -1) {
dirty_top[blk] = y;
}
}
}
}
for (x = ssd->dirty.left; x < ssd->dirty.right; x += blksize) {
blk = x / blksize;
bw = MIN(blksize, ssd->dirty.right - x);
if (dirty_top[blk] != -1) {
QXLRect update = {
.top = dirty_top[blk],
.bottom = ssd->dirty.bottom,
.left = x,
.right = x + bw,
};
qemu_spice_create_one_update(ssd, &update);
dirty_top[blk] = -1;
}
}
memset(&ssd->dirty, 0, sizeof(ssd->dirty));
}
static SimpleSpiceCursor*
qemu_spice_create_cursor_update(SimpleSpiceDisplay *ssd,
QEMUCursor *c)
{
size_t size = c ? c->width * c->height * 4 : 0;
SimpleSpiceCursor *update;
QXLCursorCmd *ccmd;
QXLCursor *cursor;
QXLCommand *cmd;
update = g_malloc0(sizeof(*update) + size);
ccmd = &update->cmd;
cursor = &update->cursor;
cmd = &update->ext.cmd;
if (c) {
ccmd->type = QXL_CURSOR_SET;
ccmd->u.set.position.x = ssd->ptr_x;
ccmd->u.set.position.y = ssd->ptr_y;
ccmd->u.set.visible = true;
ccmd->u.set.shape = (uintptr_t)cursor;
cursor->header.unique = ssd->unique++;
cursor->header.type = SPICE_CURSOR_TYPE_ALPHA;
cursor->header.width = c->width;
cursor->header.height = c->height;
cursor->header.hot_spot_x = c->hot_x;
cursor->header.hot_spot_y = c->hot_y;
cursor->data_size = size;
cursor->chunk.data_size = size;
memcpy(cursor->chunk.data, c->data, size);
} else {
ccmd->type = QXL_CURSOR_MOVE;
ccmd->u.position.x = ssd->ptr_x;
ccmd->u.position.y = ssd->ptr_y;
}
ccmd->release_info.id = (uintptr_t)(&update->ext);
cmd->type = QXL_CMD_CURSOR;
cmd->data = (uintptr_t)ccmd;
return update;
}
/*
* Called from spice server thread context (via interface_release_resource)
* We do *not* hold the global qemu mutex here, so extra care is needed
* when calling qemu functions. QEMU interfaces used:
* - g_free (underlying glibc free is re-entrant).
*/
void qemu_spice_destroy_update(SimpleSpiceDisplay *sdpy, SimpleSpiceUpdate *update)
{
g_free(update->bitmap);
g_free(update);
}
void qemu_spice_create_host_memslot(SimpleSpiceDisplay *ssd)
{
QXLDevMemSlot memslot;
dprint(1, "%s/%d:\n", __func__, ssd->qxl.id);
memset(&memslot, 0, sizeof(memslot));
memslot.slot_group_id = MEMSLOT_GROUP_HOST;
memslot.virt_end = ~0;
qemu_spice_add_memslot(ssd, &memslot, QXL_SYNC);
}
void qemu_spice_create_host_primary(SimpleSpiceDisplay *ssd)
{
QXLDevSurfaceCreate surface;
uint64_t surface_size;
memset(&surface, 0, sizeof(surface));
surface_size = (uint64_t) surface_width(ssd->ds) *
surface_height(ssd->ds) * 4;
assert(surface_size > 0);
assert(surface_size < INT_MAX);
if (ssd->bufsize < surface_size) {
ssd->bufsize = surface_size;
g_free(ssd->buf);
ssd->buf = g_malloc(ssd->bufsize);
}
dprint(1, "%s/%d: %ux%u (size %" PRIu64 "/%d)\n", __func__, ssd->qxl.id,
surface_width(ssd->ds), surface_height(ssd->ds),
surface_size, ssd->bufsize);
surface.format = SPICE_SURFACE_FMT_32_xRGB;
surface.width = surface_width(ssd->ds);
surface.height = surface_height(ssd->ds);
surface.stride = -surface.width * 4;
surface.mouse_mode = true;
surface.flags = 0;
surface.type = 0;
surface.mem = (uintptr_t)ssd->buf;
surface.group_id = MEMSLOT_GROUP_HOST;
qemu_spice_create_primary_surface(ssd, 0, &surface, QXL_SYNC);
}
void qemu_spice_destroy_host_primary(SimpleSpiceDisplay *ssd)
{
dprint(1, "%s/%d:\n", __func__, ssd->qxl.id);
qemu_spice_destroy_primary_surface(ssd, 0, QXL_SYNC);
}
void qemu_spice_display_init_common(SimpleSpiceDisplay *ssd)
{
qemu_mutex_init(&ssd->lock);
QTAILQ_INIT(&ssd->updates);
ssd->mouse_x = -1;
ssd->mouse_y = -1;
if (ssd->num_surfaces == 0) {
ssd->num_surfaces = 1024;
}
}
/* display listener callbacks */
void qemu_spice_display_update(SimpleSpiceDisplay *ssd,
int x, int y, int w, int h)
{
QXLRect update_area;
dprint(2, "%s/%d: x %d y %d w %d h %d\n", __func__,
ssd->qxl.id, x, y, w, h);
update_area.left = x,
update_area.right = x + w;
update_area.top = y;
update_area.bottom = y + h;
if (qemu_spice_rect_is_empty(&ssd->dirty)) {
ssd->notify++;
}
qemu_spice_rect_union(&ssd->dirty, &update_area);
}
void qemu_spice_display_switch(SimpleSpiceDisplay *ssd,
DisplaySurface *surface)
{
SimpleSpiceUpdate *update;
bool need_destroy;
dprint(1, "%s/%d:\n", __func__, ssd->qxl.id);
memset(&ssd->dirty, 0, sizeof(ssd->dirty));
if (ssd->surface) {
pixman_image_unref(ssd->surface);
ssd->surface = NULL;
pixman_image_unref(ssd->mirror);
ssd->mirror = NULL;
}
qemu_mutex_lock(&ssd->lock);
need_destroy = (ssd->ds != NULL);
ssd->ds = surface;
while ((update = QTAILQ_FIRST(&ssd->updates)) != NULL) {
QTAILQ_REMOVE(&ssd->updates, update, next);
qemu_spice_destroy_update(ssd, update);
}
qemu_mutex_unlock(&ssd->lock);
if (need_destroy) {
qemu_spice_destroy_host_primary(ssd);
}
if (ssd->ds) {
qemu_spice_create_host_primary(ssd);
}
memset(&ssd->dirty, 0, sizeof(ssd->dirty));
ssd->notify++;
}
void qemu_spice_cursor_refresh_unlocked(SimpleSpiceDisplay *ssd)
{
if (ssd->cursor) {
assert(ssd->dcl.con);
dpy_cursor_define(ssd->dcl.con, ssd->cursor);
cursor_put(ssd->cursor);
ssd->cursor = NULL;
}
if (ssd->mouse_x != -1 && ssd->mouse_y != -1) {
assert(ssd->dcl.con);
dpy_mouse_set(ssd->dcl.con, ssd->mouse_x, ssd->mouse_y, 1);
ssd->mouse_x = -1;
ssd->mouse_y = -1;
}
}
void qemu_spice_display_refresh(SimpleSpiceDisplay *ssd)
{
dprint(3, "%s/%d:\n", __func__, ssd->qxl.id);
graphic_hw_update(ssd->dcl.con);
qemu_mutex_lock(&ssd->lock);
if (QTAILQ_EMPTY(&ssd->updates) && ssd->ds) {
qemu_spice_create_update(ssd);
ssd->notify++;
}
qemu_spice_cursor_refresh_unlocked(ssd);
qemu_mutex_unlock(&ssd->lock);
if (ssd->notify) {
ssd->notify = 0;
qemu_spice_wakeup(ssd);
dprint(2, "%s/%d: notify\n", __func__, ssd->qxl.id);
}
}
/* spice display interface callbacks */
static void interface_attach_worker(QXLInstance *sin, QXLWorker *qxl_worker)
{
SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
dprint(1, "%s/%d:\n", __func__, ssd->qxl.id);
ssd->worker = qxl_worker;
}
static void interface_set_compression_level(QXLInstance *sin, int level)
{
dprint(1, "%s/%d:\n", __func__, sin->id);
/* nothing to do */
}
static void interface_set_mm_time(QXLInstance *sin, uint32_t mm_time)
{
dprint(3, "%s/%d:\n", __func__, sin->id);
/* nothing to do */
}
static void interface_get_init_info(QXLInstance *sin, QXLDevInitInfo *info)
{
SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
info->memslot_gen_bits = MEMSLOT_GENERATION_BITS;
info->memslot_id_bits = MEMSLOT_SLOT_BITS;
info->num_memslots = NUM_MEMSLOTS;
info->num_memslots_groups = NUM_MEMSLOTS_GROUPS;
info->internal_groupslot_id = 0;
info->qxl_ram_size = 16 * 1024 * 1024;
info->n_surfaces = ssd->num_surfaces;
}
static int interface_get_command(QXLInstance *sin, struct QXLCommandExt *ext)
{
SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
SimpleSpiceUpdate *update;
int ret = false;
dprint(3, "%s/%d:\n", __func__, ssd->qxl.id);
qemu_mutex_lock(&ssd->lock);
update = QTAILQ_FIRST(&ssd->updates);
if (update != NULL) {
QTAILQ_REMOVE(&ssd->updates, update, next);
*ext = update->ext;
ret = true;
}
qemu_mutex_unlock(&ssd->lock);
return ret;
}
static int interface_req_cmd_notification(QXLInstance *sin)
{
dprint(1, "%s/%d:\n", __func__, sin->id);
return 1;
}
static void interface_release_resource(QXLInstance *sin,
struct QXLReleaseInfoExt rext)
{
SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
SimpleSpiceUpdate *update;
SimpleSpiceCursor *cursor;
QXLCommandExt *ext;
dprint(2, "%s/%d:\n", __func__, ssd->qxl.id);
ext = (void *)(intptr_t)(rext.info->id);
switch (ext->cmd.type) {
case QXL_CMD_DRAW:
update = container_of(ext, SimpleSpiceUpdate, ext);
qemu_spice_destroy_update(ssd, update);
break;
case QXL_CMD_CURSOR:
cursor = container_of(ext, SimpleSpiceCursor, ext);
g_free(cursor);
break;
default:
g_assert_not_reached();
}
}
static int interface_get_cursor_command(QXLInstance *sin, struct QXLCommandExt *ext)
{
SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
int ret;
dprint(3, "%s/%d:\n", __func__, ssd->qxl.id);
qemu_mutex_lock(&ssd->lock);
if (ssd->ptr_define) {
*ext = ssd->ptr_define->ext;
ssd->ptr_define = NULL;
ret = true;
} else if (ssd->ptr_move) {
*ext = ssd->ptr_move->ext;
ssd->ptr_move = NULL;
ret = true;
} else {
ret = false;
}
qemu_mutex_unlock(&ssd->lock);
return ret;
}
static int interface_req_cursor_notification(QXLInstance *sin)
{
dprint(1, "%s:\n", __FUNCTION__);
return 1;
}
static void interface_notify_update(QXLInstance *sin, uint32_t update_id)
{
fprintf(stderr, "%s: abort()\n", __FUNCTION__);
abort();
}
static int interface_flush_resources(QXLInstance *sin)
{
fprintf(stderr, "%s: abort()\n", __FUNCTION__);
abort();
return 0;
}
static void interface_update_area_complete(QXLInstance *sin,
uint32_t surface_id,
QXLRect *dirty, uint32_t num_updated_rects)
{
/* should never be called, used in qxl native mode only */
fprintf(stderr, "%s: abort()\n", __func__);
abort();
}
/* called from spice server thread context only */
static void interface_async_complete(QXLInstance *sin, uint64_t cookie_token)
{
/* should never be called, used in qxl native mode only */
fprintf(stderr, "%s: abort()\n", __func__);
abort();
}
static void interface_set_client_capabilities(QXLInstance *sin,
uint8_t client_present,
uint8_t caps[58])
{
dprint(3, "%s:\n", __func__);
}
static int interface_client_monitors_config(QXLInstance *sin,
VDAgentMonitorsConfig *mc)
{
SimpleSpiceDisplay *ssd = container_of(sin, SimpleSpiceDisplay, qxl);
QemuUIInfo info;
int rc;
if (!mc) {
return 1;
}
/*
* FIXME: multihead is tricky due to the way
* spice has multihead implemented.
*/
memset(&info, 0, sizeof(info));
if (mc->num_of_monitors > 0) {
info.width = mc->monitors[0].width;
info.height = mc->monitors[0].height;
}
rc = dpy_set_ui_info(ssd->dcl.con, &info);
dprint(1, "%s/%d: size %dx%d, rc %d <--- ==========================\n",
__func__, ssd->qxl.id, info.width, info.height, rc);
if (rc != 0) {
return 0; /* == not supported by guest */
} else {
return 1;
}
}
static const QXLInterface dpy_interface = {
.base.type = SPICE_INTERFACE_QXL,
.base.description = "qemu simple display",
.base.major_version = SPICE_INTERFACE_QXL_MAJOR,
.base.minor_version = SPICE_INTERFACE_QXL_MINOR,
.attache_worker = interface_attach_worker,
.set_compression_level = interface_set_compression_level,
.set_mm_time = interface_set_mm_time,
.get_init_info = interface_get_init_info,
/* the callbacks below are called from spice server thread context */
.get_command = interface_get_command,
.req_cmd_notification = interface_req_cmd_notification,
.release_resource = interface_release_resource,
.get_cursor_command = interface_get_cursor_command,
.req_cursor_notification = interface_req_cursor_notification,
.notify_update = interface_notify_update,
.flush_resources = interface_flush_resources,
.async_complete = interface_async_complete,
.update_area_complete = interface_update_area_complete,
.set_client_capabilities = interface_set_client_capabilities,
.client_monitors_config = interface_client_monitors_config,
};
static void display_update(DisplayChangeListener *dcl,
int x, int y, int w, int h)
{
SimpleSpiceDisplay *ssd = container_of(dcl, SimpleSpiceDisplay, dcl);
qemu_spice_display_update(ssd, x, y, w, h);
}
static void display_switch(DisplayChangeListener *dcl,
struct DisplaySurface *surface)
{
SimpleSpiceDisplay *ssd = container_of(dcl, SimpleSpiceDisplay, dcl);
qemu_spice_display_switch(ssd, surface);
}
static void display_refresh(DisplayChangeListener *dcl)
{
SimpleSpiceDisplay *ssd = container_of(dcl, SimpleSpiceDisplay, dcl);
qemu_spice_display_refresh(ssd);
}
static void display_mouse_set(DisplayChangeListener *dcl,
int x, int y, int on)
{
SimpleSpiceDisplay *ssd = container_of(dcl, SimpleSpiceDisplay, dcl);
qemu_mutex_lock(&ssd->lock);
ssd->ptr_x = x;
ssd->ptr_y = x;
if (ssd->ptr_move) {
g_free(ssd->ptr_move);
}
ssd->ptr_move = qemu_spice_create_cursor_update(ssd, NULL);
qemu_mutex_unlock(&ssd->lock);
}
static void display_mouse_define(DisplayChangeListener *dcl,
QEMUCursor *c)
{
SimpleSpiceDisplay *ssd = container_of(dcl, SimpleSpiceDisplay, dcl);
qemu_mutex_lock(&ssd->lock);
if (ssd->ptr_move) {
g_free(ssd->ptr_move);
ssd->ptr_move = NULL;
}
if (ssd->ptr_define) {
g_free(ssd->ptr_define);
}
ssd->ptr_define = qemu_spice_create_cursor_update(ssd, c);
qemu_mutex_unlock(&ssd->lock);
}
static const DisplayChangeListenerOps display_listener_ops = {
.dpy_name = "spice",
.dpy_gfx_update = display_update,
.dpy_gfx_switch = display_switch,
.dpy_refresh = display_refresh,
.dpy_mouse_set = display_mouse_set,
.dpy_cursor_define = display_mouse_define,
};
static void qemu_spice_display_init_one(QemuConsole *con)
{
SimpleSpiceDisplay *ssd = g_new0(SimpleSpiceDisplay, 1);
qemu_spice_display_init_common(ssd);
ssd->qxl.base.sif = &dpy_interface.base;
qemu_spice_add_display_interface(&ssd->qxl, con);
assert(ssd->worker);
qemu_spice_create_host_memslot(ssd);
ssd->dcl.ops = &display_listener_ops;
ssd->dcl.con = con;
register_displaychangelistener(&ssd->dcl);
}
void qemu_spice_display_init(void)
{
QemuConsole *con;
int i;
for (i = 0;; i++) {
con = qemu_console_lookup_by_index(i);
if (!con || !qemu_console_is_graphic(con)) {
break;
}
if (qemu_spice_have_display_interface(con)) {
continue;
}
qemu_spice_display_init_one(con);
}
}