hw/i386/amd_iommu.c seems unmaintained:
After commit 1c7955c450 ("x86-iommu: introduce parent class",
2016-07-14), almost no feature added, 2 bug fixes, other changes
are generic tree-wide API cleanups.

Cc: Roman Kapl <rka@sysgo.com>
Cc: Wei Huang <wei.huang2@amd.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: David Kiarie <davidkiarie4@gmail.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
Following
https://lore.kernel.org/qemu-devel/CACGkMEtjmpX8G9HYZ0r3n5ErhAENKhQ81f4ocfCYrh=XoF=5hw@mail.gmail.com/
---
 MAINTAINERS | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 95c957d587..8badbb01d3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3356,6 +3356,10 @@ F: hw/i386/intel_iommu.c
 F: hw/i386/intel_iommu_internal.h
 F: include/hw/i386/intel_iommu.h
 
+AMD-Vi Emulation
+S: Orphan
+F: hw/i386/amd_iommu.?
+
 OpenSBI Firmware
 M: Bin Meng <bmeng.cn@gmail.com>
 S: Supported
-- 
2.38.1