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qxl: qxl_add_memslot: remove guest trigerrable panics 

Signed-off-by: Alon Levy <alevy@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Alon Levy 2012-04-25 12:13:24 +03:00 committed by Gerd Hoffmann
parent baeae407e6
commit e954ea2873
1 changed files with 20 additions and 7 deletions
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27
hw/qxl.c
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@ -1038,8 +1038,8 @@ static const MemoryRegionPortio qxl_vga_portio_list[] = {
PORTIO_END_OF_LIST(),
};
static void qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta,
qxl_async_io async)
static int qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta,
qxl_async_io async)
{
static const int regions[] = {
QXL_RAM_RANGE_INDEX,
@ -1060,8 +1060,16 @@ static void qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta,
trace_qxl_memslot_add_guest(d->id, slot_id, guest_start, guest_end);
PANIC_ON(slot_id >= NUM_MEMSLOTS);
PANIC_ON(guest_start > guest_end);
if (slot_id >= NUM_MEMSLOTS) {
qxl_guest_bug(d, "%s: slot_id >= NUM_MEMSLOTS %d >= %d", __func__,
slot_id, NUM_MEMSLOTS);
return 1;
}
if (guest_start > guest_end) {
qxl_guest_bug(d, "%s: guest_start > guest_end 0x%" PRIx64
" > 0x%" PRIx64, __func__, guest_start, guest_end);
return 1;
}
for (i = 0; i < ARRAY_SIZE(regions); i++) {
pci_region = regions[i];
@ -1082,7 +1090,10 @@ static void qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta,
/* passed */
break;
}
PANIC_ON(i == ARRAY_SIZE(regions)); /* finished loop without match */
if (i == ARRAY_SIZE(regions)) {
qxl_guest_bug(d, "%s: finished loop without match", __func__);
return 1;
}
switch (pci_region) {
case QXL_RAM_RANGE_INDEX:
@ -1094,7 +1105,8 @@ static void qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta,
break;
default:
/* should not happen */
abort();
qxl_guest_bug(d, "%s: pci_region = %d", __func__, pci_region);
return 1;
}
memslot.slot_id = slot_id;
@ -1110,6 +1122,7 @@ static void qxl_add_memslot(PCIQXLDevice *d, uint32_t slot_id, uint64_t delta,
d->guest_slots[slot_id].size = memslot.virt_end - memslot.virt_start;
d->guest_slots[slot_id].delta = delta;
d->guest_slots[slot_id].active = 1;
return 0;
}
static void qxl_del_memslot(PCIQXLDevice *d, uint32_t slot_id)
@ -1250,7 +1263,7 @@ static void qxl_set_mode(PCIQXLDevice *d, int modenr, int loadvm)
}
d->guest_slots[0].slot = slot;
qxl_add_memslot(d, 0, devmem, QXL_SYNC);
assert(qxl_add_memslot(d, 0, devmem, QXL_SYNC) == 0);
d->guest_primary.surface = surface;
qxl_create_guest_primary(d, 0, QXL_SYNC);