The current kexec_file ignores kexec_buf.top_down value when call arch_kexec_walk_mem() to allocate memory for loading kernel/initrd stuffs. This is not supposed to be what kexec_buf.top_down is used for. In patch 0001, introduce a new function walk_system_ram_res_rev() which is a variant of walk_system_ram_res(), walks through resources of System RAM from top to down. And patch 0001 is picked from AKASHI's patchset which adds arm64 kexec_file support. His next round of post won't need walk_system_ram_res_rev any more, so I take it into this patchset and use it in patch 0002. In patch 0002, check kexec_buf.top_down in arch_kexec_walk_mem(), if its value is 'true', call walk_system_ram_res_rev(). Otherwise call walk_system_ram_res(). AKASHI Takahiro (1): resource: add walk_system_ram_res_rev() Baoquan He (1): kexec_file: Load kernel at top of system RAM if required include/linux/ioport.h | 3 +++ kernel/kexec_file.c | 2 ++ kernel/resource.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 68 insertions(+) -- 2.13.6 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
