Hi, > >> In Xen platform, after using upstream qemu, the all of pci devices will > >> show > >> hotplug in the windows guest. In this situation, the windows guest may > occur > >> blue screen when VM' user click the icon of VGA card for trying unplug VGA > >> card. > >> However, we don't hope VM's user can do such dangerous operation, and > >> showing > >> all pci devices inside the guest OS is unfriendly. > >> > >> This is done by runtime patching: > >> - Rename _EJ0 methods for PCI slots in DSDT to EJ0_:note that this has > the > >> same checksum, but is ignored by OSPM. > >> - At compile time, look for these methods in ASL source,find the > matching > >> AML, > >> and store the offsets of these methods in a table named > aml_ej0_data. > >> - At run time, go over aml_ej0_data, check which slots not support > hotplug > >> and > >> patch the ACPI table, replacing _EJ0 with EJ0_. > >> > >> Signed-off-by: Gaowei <gao.gao...@huawei.com> > >> Signed-off-by: Gonglei <arei.gong...@huawei.com> > > Tested-by: Fabio Fantoni <fabio.fant...@m2r.biz> > > Thanks for this very useful patch that avoid that unaware users or as > mistake make windows domUs unusable. > Thanks.
> I tried to quickly look at the patch to understand how to add some > optional components, for example on my case the pv drivers, the audio > card and the spice guest tools (see attachment) but I don't understand > how to do it. > Can someone give me some advices about it please? > Maybe you can hard code at libxl__build_device_model_args_new() in tools/libxl/libxl_dm.c Best regards, -Gonglei
