Re: [PATCH v3 01/11] kexec: introduce kexec firmware support

Eric W. Biederman
2012-12-27T04:47:01Z

Daniel Kiper <daniel.kiper@oracle.com> writes:

> Some kexec/kdump implementations (e.g. Xen PVOPS) could not use default
> Linux infrastructure and require some support from firmware and/or hypervisor.
> To cope with that problem kexec firmware infrastructure was introduced.
> It allows a developer to use all kexec/kdump features of given firmware
> or hypervisor.

As this stands this patch is wrong.

You need to pass an additional flag from userspace through /sbin/kexec
that says load the kexec image in the firmware. A global variable here
is not ok.

As I understand it you are loading a kexec on xen panic image. Which
is semantically different from a kexec on linux panic image. It is not
ok to do have a silly global variable kexec_use_firmware.

Furthermore it is not ok to have a conditional code outside of header
files.

Eric