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qxl: bugfixes. 

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Merge remote-tracking branch 'remotes/kraxel/tags/pull-fixes-20170411-1' into staging

qxl: bugfixes.

# gpg: Signature made Tue 11 Apr 2017 08:00:00 BST
# gpg:                using RSA key 0x4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>"
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>"
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>"
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/pull-fixes-20170411-1:
  qxl: add migration blocker to avoid pre-save assert
  qxl: switch display on entering VGA

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2017-04-11 10:03:51 +01:00
parent c322fdd41a 86dbcdd9c7
commit 17fa24b79c
2 changed files with 33 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
hw/display/qxl.c
View File

@ -26,6 +26,7 @@
#include "qemu/queue.h"
#include "qemu/atomic.h"
#include "sysemu/sysemu.h"
#include "migration/migration.h"
#include "trace.h"
#include "qxl.h"
@ -639,6 +640,30 @@ static int interface_get_command(QXLInstance *sin, struct QXLCommandExt *ext)
qxl->guest_primary.commands++;
qxl_track_command(qxl, ext);
qxl_log_command(qxl, "cmd", ext);
{
/*
* Windows 8 drivers place qxl commands in the vram
* (instead of the ram) bar. We can't live migrate such a
* guest, so add a migration blocker in case we detect
* this, to avoid triggering the assert in pre_save().
*
* https://cgit.freedesktop.org/spice/win32/qxl-wddm-dod/commit/?id=f6e099db39e7d0787f294d5fd0dce328b5210faa
*/
void *msg = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id);
if (msg != NULL && (
msg < (void *)qxl->vga.vram_ptr ||
msg > ((void *)qxl->vga.vram_ptr + qxl->vga.vram_size))) {
if (!qxl->migration_blocker) {
Error *local_err = NULL;
error_setg(&qxl->migration_blocker,
"qxl: guest bug: command not in ram bar");
migrate_add_blocker(qxl->migration_blocker, &local_err);
if (local_err) {
error_report_err(local_err);
}
}
}
}
trace_qxl_ring_command_get(qxl->id, qxl_mode_to_string(qxl->mode));
return true;
default:
@ -1146,6 +1171,7 @@ static void qxl_enter_vga_mode(PCIQXLDevice *d)
update_displaychangelistener(&d->ssd.dcl, GUI_REFRESH_INTERVAL_DEFAULT);
qemu_spice_create_host_primary(&d->ssd);
d->mode = QXL_MODE_VGA;
qemu_spice_display_switch(&d->ssd, d->ssd.ds);
vga_dirty_log_start(&d->vga);
graphic_hw_update(d->vga.con);
}
@ -1235,6 +1261,12 @@ static void qxl_hard_reset(PCIQXLDevice *d, int loadvm)
qemu_spice_create_host_memslot(&d->ssd);
qxl_soft_reset(d);
if (d->migration_blocker) {
migrate_del_blocker(d->migration_blocker);
error_free(d->migration_blocker);
d->migration_blocker = NULL;
}
if (startstop) {
qemu_spice_display_start();
}

1
hw/display/qxl.h
View File

@ -40,6 +40,7 @@ typedef struct PCIQXLDevice {
uint32_t cmdlog;
uint32_t guest_bug;
Error *migration_blocker;
enum qxl_mode mode;
uint32_t cmdflags;