along side setting host page table to be read-only, the memory regions
are also required to be read-only, so that when guest writes to the
read-only & mmap'd regions, vmexits would happen and region write handlers
are called.
Signed-off-by: Yan Zhao <address@hidden>
Signed-off-by: Xin Zeng <address@hidden>
---
hw/vfio/common.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index fd6ee1fe3e..fc7618e041 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -977,6 +977,10 @@ int vfio_region_mmap(VFIORegion *region)
name, region->mmaps[i].size,
region->mmaps[i].mmap);
g_free(name);
+
+ if (!(region->flags & VFIO_REGION_INFO_FLAG_WRITE)) {
+ memory_region_set_readonly(®ion->mmaps[i].mem, true);
+ }
memory_region_add_subregion(region->mem, region->mmaps[i].offset,
®ion->mmaps[i].mem);