On Thu, 2014-11-13 at 16:37 +0800, Dave Young wrote: > In your kexec-tools code, by default it will create dtb1 from procfs, as for external > --dtb it will be dtb2 for comparing with dtb1. > > Since dtb1 is a must so it will not work without /proc/device-tree. I changed that to allow for no /proc/device-tree if --dtb is passed since it will also allow a kernel built with CONFIG_PROC_FS=n to do kexec re-boot. Please try it and let me know. > There had some discussion about this in the thread. But I think we have no > conclusion where to go. > > There maybe below possibilities: > 1) unflattern dtb both for EFI/acpi booting even if acpi boot does not need it. > > 2) copy the bootloader passed dtb stub to somewhere, and export the stub to > userspace ie. in debugfs or procfs > like /proc/saved_dtb > > Thoughts to continue the discuss? Some progress has been made, let's see what they come up with. -Geoff
