Eventfd can be registered with a zero length when fast_mmio is true.
Handle this case properly when dispatching through QEMU.
Signed-off-by: Elena Afanasova <eafanas...@gmail.com>
---
softmmu/memory.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/softmmu/memory.c b/softmmu/memory.c
index 403ff3abc9..3ca2154a64 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -203,10 +203,17 @@ static bool
memory_region_ioeventfd_before(MemoryRegionIoeventfd *a,
}
static bool memory_region_ioeventfd_equal(MemoryRegionIoeventfd *a,
- MemoryRegionIoeventfd *b)
-{
- return !memory_region_ioeventfd_before(a, b)
- && !memory_region_ioeventfd_before(b, a);
+ MemoryRegionIoeventfd *mrb)
+{
+ if (int128_eq(a->addr.start, mrb->addr.start) &&
+ (!int128_nz(mrb->addr.size) ||
+ int128_eq(a->addr.size, mrb->addr.size)) &&
+ (a->match_data == mrb->match_data) &&
+ ((mrb->match_data && (a->data == mrb->data)) || !mrb->match_data)
&&
+ (a->e == mrb->e))
+ return true;
+
+ return false;
}
/* Range of memory in the global map. Addresses are absolute. */
--
2.25.1
