Hi, Russell On 04/28/16 at 10:26am, Russell King - ARM Linux wrote: > These changes are required for TI Keystone2 kexec to be functional. TI > Keystone2 has the run-time view of physical memory above 4GiB, but with > a boot time alias below 4GiB which can only be used during the early > boot. > > This means we need to translate run-time physical addresses (which the > kernel uses) to boot-time physical addresses, which, having discussed > with Eric, is what the kexec tools and kexec kernel API requires. > > We publish a special set of boot time resources in /proc/iomem, which > the (modified) kexec tools look for in preference to the normal resources. > Hence, if these are found, the kexec tools make use of these resources, > and thus kexec tools use the boot-time view of physical memory. I think getting memory ranges from device tree will be better than adding more stuff to /proc/iomem. Geoff's arm64 kexec patches is using dtb you can refer to the patchset. Thanks Dave
