From: Alexander Duyck <alexander.h.du...@linux.intel.com>
According to the documentation in memory.h a ROM memory region will be
backed by RAM for reads, but is supposed to go through a callback for
writes. Currently we were not checking for the existence of the rom_device
flag when determining if we could perform a direct write or not.
To correct that add a check to memory_region_is_direct so that if the
memory region has the rom_device flag set we will return false for all
checks where is_write is set.
Signed-off-by: Alexander Duyck <alexander.h.du...@linux.intel.com>
---
include/exec/memory.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 1614d9a02c0c..e000bd2f97b2 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -2351,8 +2351,8 @@ void address_space_write_cached_slow(MemoryRegionCache
*cache,
static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write)
{
if (is_write) {
- return memory_region_is_ram(mr) &&
- !mr->readonly && !memory_region_is_ram_device(mr);
+ return memory_region_is_ram(mr) && !mr->readonly &&
+ !mr->rom_device && !memory_region_is_ram_device(mr);
} else {
return (memory_region_is_ram(mr) && !memory_region_is_ram_device(mr))
||
memory_region_is_romd(mr);
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