[Qemu-devel] [RFC PATCH qemu v2 2/5] vfio: Skip PCI BARs in memory listener

[Alexey Kardashevskiy <aik@ozlabs.ru>]

In some cases PCI BARs are registered as RAM via
memory_region_init_ram_ptr() and the vfio_memory_listener will be called
on them too. However DMA will not be performed to/from these regions so
just skip them.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
 hw/vfio/common.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index d115ec9..225cdc7 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -248,7 +248,8 @@ static bool vfio_listener_skipped_section(MemoryRegionSection *section)
             * are never accessed by the CPU and beyond the address width of
             * some IOMMU hardware.  TODO: VFIO should tell us the IOMMU width.
             */
-           section->offset_within_address_space & (1ULL << 63);
+           section->offset_within_address_space & (1ULL << 63) ||
+           memory_region_is_skip_dump(section->mr);
 }
 
 static void vfio_iommu_map_notify(Notifier *n, void *data)
-- 
2.4.0.rc3.8.gfb3e7d5