Hi All, This series adds the core support for kexec re-boot and kdump on ARM64. This version of the series combines Takahiro's kdump patches with my kexec patches. Changes since v11: o No changes, rebase to v4.4-rc2. Changes since v10: o Move the flush of the new image from arm64_relocate_new_kernel to machine_kexec. o Pass values to arm64_relocate_new_kernel in registers, not in global variables. o Fixups to setting the sctlr_el1 and sctlr_el2 flags. To load a second stage kernel and execute a kexec re-boot or to work with kdump on ARM64 systems a series of patches to kexec-tools [2], which have not yet been merged upstream, are needed. I have tested kexec with the ARM Foundation model, and Takahiro has reported that kdump is working on the 96boards HiKey developer board. Kexec on EFI systems works 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 & 3 rework the ARM64 hcall mechanism to give the CPU reset routines the ability to switch exception levels from EL1 to EL2 for kernels that were entered in EL2. Patch 4 allows KVM to handle a CPU reset. Patches 5 - 7 add back the ARM64 CPU reset support that was recently removed from the kernel. Patches 8 - 10 add kexec support. Patches 11-16 add kdump 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 -Geoff The following changes since commit 1ec218373b8ebda821aec00bb156a9c94fad9cd4: Linux 4.4-rc2 (2015-11-22 16:45:59 -0800) are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/geoff/linux-kexec.git kexec-v12 for you to fetch changes up to 83db66df70fc1f7cd4da8b580d264b9320991cf0: arm64: kdump: relax BUG_ON() if more than one cpus are still active (2015-11-24 13:59:27 -0800) ---------------------------------------------------------------- AKASHI Takahiro (7): arm64: kvm: allows kvm cpu hotplug arm64: kdump: reserve memory for crash dump kernel arm64: kdump: implement machine_crash_shutdown() arm64: kdump: add kdump support arm64: kdump: update a kernel doc arm64: kdump: enable kdump in the arm64 defconfig arm64: kdump: relax BUG_ON() if more than one cpus are still active Geoff Levand (9): arm64: Fold proc-macros.S into assembler.h arm64: Convert hcalls to use HVC immediate value arm64: Add new hcall HVC_CALL_FUNC arm64: Add back cpu_reset routines Revert "arm64: mm: remove unused cpu_set_idmap_tcr_t0sz function" Revert "arm64: remove dead code" arm64/kexec: Add core kexec support arm64/kexec: Add pr_devel output arm64/kexec: Enable kexec in the arm64 defconfig Documentation/kdump/kdump.txt | 32 ++++- arch/arm/include/asm/kvm_host.h | 10 +- arch/arm/include/asm/kvm_mmu.h | 1 + arch/arm/kvm/arm.c | 79 ++++++----- arch/arm/kvm/mmu.c | 5 + arch/arm64/Kconfig | 22 ++++ arch/arm64/configs/defconfig | 2 + arch/arm64/include/asm/assembler.h | 48 ++++++- arch/arm64/include/asm/kexec.h | 80 +++++++++++ arch/arm64/include/asm/kvm_host.h | 16 ++- arch/arm64/include/asm/kvm_mmu.h | 1 + arch/arm64/include/asm/mmu.h | 1 + arch/arm64/include/asm/mmu_context.h | 35 +++-- arch/arm64/include/asm/virt.h | 49 +++++++ arch/arm64/kernel/Makefile | 3 + arch/arm64/kernel/cpu-reset.S | 84 ++++++++++++ arch/arm64/kernel/cpu-reset.h | 22 ++++ arch/arm64/kernel/crash_dump.c | 71 ++++++++++ arch/arm64/kernel/hyp-stub.S | 43 ++++-- arch/arm64/kernel/machine_kexec.c | 248 +++++++++++++++++++++++++++++++++++ arch/arm64/kernel/relocate_kernel.S | 131 ++++++++++++++++++ arch/arm64/kernel/setup.c | 7 +- arch/arm64/kernel/smp.c | 16 ++- arch/arm64/kvm/hyp-init.S | 34 ++++- arch/arm64/kvm/hyp.S | 44 +++++-- arch/arm64/mm/cache.S | 2 - arch/arm64/mm/init.c | 83 ++++++++++++ arch/arm64/mm/mmu.c | 11 ++ arch/arm64/mm/proc-macros.S | 64 --------- arch/arm64/mm/proc.S | 3 - include/uapi/linux/kexec.h | 1 + 31 files changed, 1097 insertions(+), 151 deletions(-) create mode 100644 arch/arm64/include/asm/kexec.h create mode 100644 arch/arm64/kernel/cpu-reset.S create mode 100644 arch/arm64/kernel/cpu-reset.h create mode 100644 arch/arm64/kernel/crash_dump.c create mode 100644 arch/arm64/kernel/machine_kexec.c create mode 100644 arch/arm64/kernel/relocate_kernel.S delete mode 100644 arch/arm64/mm/proc-macros.S -- 2.5.0
