On 9/20/21 12:27 AM, Elliott Mitchell wrote:
On Sun, Sep 19, 2021 at 01:05:56AM -0400, Chuck Zmudzinski wrote:
I suspect the following patch is the culprit for problems
shutting down on the amd64 architecture:
0030-xen-acpi-Rework-acpi_os_map_memory-and-acpi_os_unmap.patch
This patch does affect amd64 acpi code, and is probably causing
the problem on my amd64 system, so my build of the xen-4.14
hypervisor without this patch fixed the problem.
Of the ones listed that is the only one which has any overlap with x86
code. The next reproduction step is `apt-get source xen &&
patch -p1 -R < 0030-xen-acpi-Rework-acpi_os_map_memory-and-acpi_os_unmap.patch
&& dpkg-buildpackage -b`. Then try with this to confirm that patch
is what does it.
Thing is that delta is rather small. I don't have a simulator, but that
is rather small to be the culprit.
I just tested the build with
patch -p1 -R <
0030-xen-acpi-Rework-acpi_os_map_memory-and-acpi_os_unmap.patch
applied before building the package and I can confirm that this is the patch
causing the trouble for dom0 poweroff on x86/amd64. Reverting this patch
fixes it on my amd64 system. But this would probably break the arm build.
I think one possible fix would require modifying
0030-xen-acpi-Rework-acpi_os_map_memory-and-acpi_os_unmap.patch
so it only applies at runtime to the arm architecture. I will try some
modifications to the patch instead of removing it, and if I get something
that works on amd64 and also might work on arm, I will post it
for Elliott to try.
