From: Gerd Hoffmann <kra...@redhat.com>
Add qxl_guest_bug() function which is supposed to be called in case
sanity checks of guest requests fail. It raises an error IRQ and
logs a message in case guest debugging is enabled.
Make PANIC_ON() abort instead of exit. That macro should be used
for qemu bugs only, any guest-triggerable stuff should use the new
qxl_guest_bug() function instead.
Convert a few easy cases from PANIC_ON() to qxl_guest_bug() to
show intended usage.
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
---
hw/qxl.c | 32 ++++++++++++++++++++++++++++----
hw/qxl.h | 3 ++-
2 files changed, 30 insertions(+), 5 deletions(-)
diff --git a/hw/qxl.c b/hw/qxl.c
index 2ecc932..3d1f108 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -124,6 +124,14 @@ static void qxl_reset_memslots(PCIQXLDevice *d);
static void qxl_reset_surfaces(PCIQXLDevice *d);
static void qxl_ring_set_dirty(PCIQXLDevice *qxl);
+void qxl_guest_bug(PCIQXLDevice *qxl, const char *msg)
+{
+ qxl_send_events(qxl, QXL_INTERRUPT_ERROR);
+ if (qxl->guestdebug) {
+ fprintf(stderr, "qxl-%d: guest bug: %s\n", qxl->id, msg);
+ }
+}
+
void qxl_spice_update_area(PCIQXLDevice *qxl, uint32_t surface_id,
struct QXLRect *area, struct QXLRect *dirty_rects,
@@ -1111,22 +1119,38 @@ static void ioport_write(void *opaque, uint32_t addr,
uint32_t val)
qxl_hard_reset(d, 0);
break;
case QXL_IO_MEMSLOT_ADD:
- PANIC_ON(val >= NUM_MEMSLOTS);
- PANIC_ON(d->guest_slots[val].active);
+ if (val >= NUM_MEMSLOTS) {
+ qxl_guest_bug(d, "QXL_IO_MEMSLOT_ADD: val out of range");
+ break;
+ }
+ if (d->guest_slots[val].active) {
+ qxl_guest_bug(d, "QXL_IO_MEMSLOT_ADD: memory slot already active");
+ break;
+ }
d->guest_slots[val].slot = d->ram->mem_slot;
qxl_add_memslot(d, val, 0);
break;
case QXL_IO_MEMSLOT_DEL:
+ if (val >= NUM_MEMSLOTS) {
+ qxl_guest_bug(d, "QXL_IO_MEMSLOT_DEL: val out of range");
+ break;
+ }
qxl_del_memslot(d, val);
break;
case QXL_IO_CREATE_PRIMARY:
- PANIC_ON(val != 0);
+ if (val != 0) {
+ qxl_guest_bug(d, "QXL_IO_CREATE_PRIMARY: val != 0");
+ break;
+ }
dprint(d, 1, "QXL_IO_CREATE_PRIMARY\n");
d->guest_primary.surface = d->ram->create_surface;
qxl_create_guest_primary(d, 0);
break;
case QXL_IO_DESTROY_PRIMARY:
- PANIC_ON(val != 0);
+ if (val != 0) {
+ qxl_guest_bug(d, "QXL_IO_DESTROY_PRIMARY: val != 0");
+ break;
+ }
dprint(d, 1, "QXL_IO_DESTROY_PRIMARY (%s)\n",
qxl_mode_to_string(d->mode));
if (d->mode != QXL_MODE_UNDEFINED) {
d->mode = QXL_MODE_UNDEFINED;
diff --git a/hw/qxl.h b/hw/qxl.h
index 5d0e85e..5db9aae 100644
--- a/hw/qxl.h
+++ b/hw/qxl.h
@@ -86,7 +86,7 @@ typedef struct PCIQXLDevice {
#define PANIC_ON(x) if ((x)) { \
printf("%s: PANIC %s failed\n", __FUNCTION__, #x); \
- exit(-1); \
+ abort(); \
}
#define dprint(_qxl, _level, _fmt, ...) \
@@ -99,6 +99,7 @@ typedef struct PCIQXLDevice {
/* qxl.c */
void *qxl_phys2virt(PCIQXLDevice *qxl, QXLPHYSICAL phys, int group_id);
+void qxl_guest_bug(PCIQXLDevice *qxl, const char *msg);
void qxl_spice_update_area(PCIQXLDevice *qxl, uint32_t surface_id,
struct QXLRect *area, struct QXLRect *dirty_rects,
--
1.7.6
