Hi, This is the v3 patchset for adding efi runtime support on kexec kernel kernel patches was sent a while ago, not yet updated in archive. in kexec-tools, this patchset will do below: 1. retrieve efi_info from sysfs boot_params, and fill the x86 setup header. If kernel does not export sysfs boot_params, still try to find them in debugfs. 2. collect data efi runtime needed: /sys/firmware/efi/systab: smbios /sys/firmware/efi/fw_vendor /sys/firmware/efi/runtime /sys/firmware/efi/config_table /sys/firmware/efi/runtime-map/*, the phys-virt mappings in 1st kernel 3. assemble setup_data based on data get in 2) then pass it to 2nd kernel Tested on OVMF, dell laptop, lenovo laptop and HP workstation TODO: add functions for easily adding setup_data, arrange them as link list because we probably will add e820 memory ranges as setup_data as well. I do not prefer to bloat this patchset anymore, so I'd likt to address this issue after the efi runtime issue finished unless people request. V2 changelog: Address comments from Simon: coding style, fixed a mem leak HPA: use type uint64_t instead of __uint64_t mjg: do not cause regression for loading old kernel use xloadflags to check the bzImage support for efi. in case old kernel, do not pass efi_info and setup_data for new kernel, do not pass acpi_rsdp Vivek: suggest to export a value in bzImage probe for efi support so it can be used to check if we should pass acpi_rsdp. V3 changelog: 01/04: new patch of a building fix try sysfs firstly for boot params add checking of efi memory range description version, bail out if it's not 1 error handling improvement and some cleanups -- Thanks Dave
