On 16.09.2022 12:55, Marek Marczykowski-Górecki wrote: > On Fri, Sep 16, 2022 at 12:28:46PM +0200, Jan Beulich wrote: >> On 16.09.2022 11:53, Marek Marczykowski-Górecki wrote: >>> On Fri, Sep 16, 2022 at 07:57:59AM +0200, Jan Beulich wrote: >>>> ... this leads to the crash, which effectively tells us that this is >>>> likely yet another system where one needs to override the reboot >>>> method (e.g. reboot=acpi). >>> >>> At least Linux, but also XenServer uses reboot=acpi by default (even on >>> EFI systems), can we make it default in upstream Xen? Issues with >>> reboot=efi are rather common, while reboot=acpi just works. >> >> But rebooting by means other than the EFI runtime service has always been >> against the spirit of EFI. > > I'm afraid firmware developers (apparently) haven't heard of it. Can we > have "works by default" behaviour?
Just like with e.g. the RTC, assuming availability of ACPI reboot is wrong under EFI. A fully conforming implementation may not support the ACPI method, while supporting the EFI runtime service. It is such a (well written) implementation where I want Xen to work correctly by default. Jan
