Hi, Here is the 1st version for supporting kexec kernel efi runtime. Per pervious discussion I pass the 1st kernel efi runtime mapping via setup_data to 2nd kernel. Besides of the runtime mapping info I also pass the fw_vendor, runtime, config table, smbios physical address in setup_data. EFI spec mentioned fw_vendor, runtime, config table addresses will be converted to virt address after entering virtual mode, but we will use it as physical address in efi_init. For smbios EFI spec did not mention about the address updating, but during my test on a HP workstation, the bios will convert it to Virt addr, thus pass it in setup_data as well. For fw_vendor, runtime, config table, I export them in /sys/firmware/ efi/systab, smbios is already in that file. For efi runtime mapping I add a new directory /sys/firmware/efi/ efi-runtime-map/ like below [dave at darkstar ~]$ tree /sys/firmware/efi/efi-runtime-map/ /sys/firmware/efi/efi-runtime-map/ ????????? 0 ??????? ????????? attribute ??????? ????????? num_pages ??????? ????????? phys_addr ??????? ????????? type ??????? ????????? virt_addr ????????? 1 ??????? ????????? attribute ??????? ????????? num_pages ??????? ????????? phys_addr ??????? ????????? type ??????? ????????? virt_addr [snip] kexec-tools will assemble them as setup_data and pass to 2nd kernel. I will send userspace patches as well. Limitation is I only write support for x86_64, test on below machines: Lenovo thinkpad t420 Dell inspiron 14 - 3421 HP Z420 workstation Qemu + OVMF Please help to review the patches. The patches are based on linus tree (3.12.0-rc6+) + matt's next tree + bp's efi mapping patches Boris's last patch can not directly apply, need a little line shifting. -- Thanks Dave
