On 19/03/15 20:35, Geoff Levand wrote: > Hi All, > > This series adds the core support for kexec re-boots on arm64. This v8 of the > series is mainly just a rebase to Linux-4.0-rc3, and a few very minor changes > requested for v7. > > To load a second stage kernel and execute a kexec re-boot on arm64 my patches to > kexec-tools [2], which have not yet been merged upstream, are needed. > > I have tested with the ARM VE fast model, the ARM Base model and the ARM > Foundation model with various kernel config options for both the first and > second stage kernels. Kexec on EFI systems works correctly. With the ACPI > kernel patches from [3] applied, kexec on ACPI systems seeems to work correctly. > More ACPI + kexec testing is needed. > > Patch 1 here moves the macros from proc-macros.S to asm/assembler.h so that the > dcache_line_size macro it defines can be uesd by kexec's relocate kernel > routine. > > Patches 2-4 rework the arm64 hcall mechanism to give the arm64 soft_restart() > routine the ability to switch exception levels from EL1 to EL2 for kernels that > were entered in EL2. > > Patches 5-6 add the actual kexec support. > > Please consider all patches for inclusion. > > [1] https://git.kernel.org/cgit/linux/kernel/git/geoff/linux-kexec.git > [2] https://git.kernel.org/cgit/linux/kernel/git/geoff/kexec-tools.git Btw, I get the following build failure for kexec-tools master branch, with Linaro tool chain (crosstool-NG linaro-1.13.1-4.9-2014.09 - Linaro GCC 4.9-2014.09 ) $ ./configure --host=aarch64-linux-gnu [...] $ make -j4 kexec/arch/arm64/kexec-arm64.c: In function ?machine_verify_elf_rel?: kexec/arch/arm64/kexec-arm64.c:970:29: error: ?EM_AARCH64? undeclared (first use in this function) return (ehdr->e_machine == EM_AARCH64); ^ kexec/arch/arm64/kexec-arm64.c:970:29: note: each undeclared identifier is reported only once for each function it appears in kexec/arch/arm64/kexec-arm64.c:971:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ make: *** [kexec/arch/arm64/kexec-arm64.o] Error 1 make: *** Waiting for unfinished jobs.... ---- You may need to add the definition of EM_AARCH64 to include/elf.h and include that instead of linux/elf.h, like the other archs. Cheers Suzuki
