[PATCH v12 00/16] arm64 kexec kernel patches v12
Geoff Levand
geoff at infradead.org
Tue Nov 24 14:25:33 PST 2015
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
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