[PATCH v15 00/20] arm64 kexec kernel patches v15

Geoff Levand
2016-03-14T17:47:59Z

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.
Please consider all patches for inclusion.

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. Please update to the latest if you have been using
an older version.

To examine vmcore (/proc/vmcore), you should use
- gdb v7.7 or later
- crash v7.1.1 or later

[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

Changes for v15 (Mar 14, 2016, 22m):

o Rebase to Linux-4.5.
o Remove DEBUG conditional in 'Add pr_debug output'.

Changes for v14 (Mar 4, 2016, 22m):

o Rebase to Linux-4.5-rc6.
o Rename setup_mm_for_reboot to cpu_install_idmap.
o kdump: leave non-boot cpus online at crash dump
As we don't have to make non-boot (crashed) cpus offline at crash dump,
this patch adds a variant of smp_send_stop().
o kdump: use a new device-tree property, "linux,elfcorehdr", instead of
traditional "elfcorehdr=" kernel parameter
o limit memory regions based on DT property, "usable-memory", instead of
"mem=" kernel parameter
o kdump: fix a build error when !CONFIG_KEXEC_CORE
o kvm: use generic kvm_call_hyp() interface instead of kvm_cpu_reset()
o kvm: initialize only a primary cpu at init_hyp_mode()

Changes for v13 (Jan 15, 2016, 20m):

o Rebase to Linux-4.4.
o Remove align directive from cpu_reset.c.
o Use inline C wrapper for cpu_soft_restart.
o Revert the new image d-cache flush changes of v10.
o Add SCTLR cleanup patch.
o Change pr_devel to pr_debug.
o Call flush_icache_range() for reboot_code_buffer.
o Add .ltorg directive to arm64_relocate_new_kernel.
o Make new asm macro copy_page.
o Change cache maintenence from inner-shareable to non-shareable.
o Rename KEXEC_ARCH_ARM64 to KEXEC_ARCH_AARCH64.

o arm64: kvm: allows kvm cpu hotplug
- remove some garbage code from kvm_host.h
o arm64: kdump: reserve memory for crash dump kernel
- change CONFIG_KEXEC to CONFIG_KEXEC_CORE
- don't panic on crash kernel alloc failure
(thanks to Mark Salter, RH)
o arm64: kdump: implement machine_crash_shutdown()
- change "boot/non-boot cpu" to "crashing/non-crashing cpu"
- introduce is_in_crash_kexec() for readability
- re-introduce machine_kexec_mask_interrupts(), as arch/arm has,
to discard unexpected interrupts
- call crash_save_cpu() before making cpus offline to avoid a possible race
(thanks to Pratyush Anand/Mark Salter, RH)
o arm64: kdump: update a kernel doc
- clarify that we support "Image" format as well as vmlinux in kdump.txt
o arm64: kdump: relax BUG_ON() if more than one cpus are still active
- change a warning message at the failure of shooting down non-crahsing cpus

Changes for v12 (Nov 24, 2015, 18m):

o No changes, rebase to Linux-4.4-rc2.

Changes for v11 (Nov 6, 2015, 18m):

o Rebase to Linux-4.3.
o Move the new image d-cache flush 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.

Changes for v10 (Oct 18, 2015, 17m):

o Rebase to Linux-4.3-rc6.
o Move tcr_set_idmap_t0sz to assembler.h.
o Add back simplified cpu_reset routines.
o Combine kexec + kdump patches.

Changes for v9 (Apr 7, 2015, 11m):

o Use new upstream flag IND_FLAGS.

Changes for v8 (Mar 19, 2015, 10m):

o Rebase to Linux-4.0-rc4.
o Re-boot using purgatory only.

Changes for v7 (Jan 16, 2015, 8m):

o Rebase to Linux-3.19-rc4.
o Change from ESR_EL2_ to ESR_ELx_.
o Remove work-arounds for EFI systems.

Changes for v6 (Dec 2, 2014, 7m):

o Rebase to Linux-3.18-rc2

Changes for v5 (Nov 16, 2014, 6m):

Changes for v4 (Oct 3, 2014, 5m):

Changes for v3 (Sept 23, 2014, 4m):

Changes for v2 (Sep 9, 2014, 4m):

o Rebase to Linux-3.17-rc4.
o Move macros from proc-macros.S to assembler.h.
o Convert hcalls to use ISS field.
o Add new hcall HVC_CALL_FUNC.
o Add EL2 switch to soft_restart.

First submission v1 (May 13, 2014):

o Based on Linux-3.15-rc4.

-Geoff

The following changes since commit b562e44f507e863c6792946e4e1b1449fbbac85d:

Linux 4.5 (2016-03-13 21:28:54 -0700)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/geoff/linux-kexec.git kexec-v15

for you to fetch changes up to 906d185a6451d3349669bcf4b080129dfaa7359f:

arm64: kdump: update a kernel doc (2016-03-14 10:29:13 -0700)

----------------------------------------------------------------
AKASHI Takahiro (7):
arm64: kvm: allows kvm cpu hotplug
arm64: kdump: reserve memory for crash dump kernel
arm64: limit memory regions based on DT property, usable-memory
arm64: kdump: implement machine_crash_shutdown()
arm64: kdump: add kdump support
arm64: kdump: enable kdump in the arm64 defconfig
arm64: kdump: update a kernel doc

Geoff Levand (11):
arm64: Fold proc-macros.S into assembler.h
arm64: Cleanup SCTLR flags
arm64: Convert hcalls to use HVC immediate value
arm64: Add new hcall HVC_CALL_FUNC
arm64: Add new asm macro copy_page
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: Enable kexec in the arm64 defconfig
arm64/kexec: Add pr_debug output

James Morse (2):
arm64: kernel: Include _AC definition in page.h
arm64: Promote KERNEL_START/KERNEL_END definitions to a header file

Documentation/kdump/kdump.txt | 15 +-
arch/arm/include/asm/kvm_host.h | 10 +-
arch/arm/include/asm/kvm_mmu.h | 1 +
arch/arm/kvm/arm.c | 104 +++++++++-----
arch/arm/kvm/mmu.c | 5 +
arch/arm64/Kconfig | 21 +++
arch/arm64/configs/defconfig | 2 +
arch/arm64/include/asm/assembler.h | 101 ++++++++++++-
arch/arm64/include/asm/hardirq.h | 2 +-
arch/arm64/include/asm/kexec.h | 82 +++++++++++
arch/arm64/include/asm/kvm_arm.h | 11 --
arch/arm64/include/asm/kvm_asm.h | 1 +
arch/arm64/include/asm/kvm_host.h | 12 +-
arch/arm64/include/asm/kvm_mmu.h | 1 +
arch/arm64/include/asm/memory.h | 3 +
arch/arm64/include/asm/mmu.h | 1 +
arch/arm64/include/asm/mmu_context.h | 35 +++--
arch/arm64/include/asm/page.h | 2 +
arch/arm64/include/asm/smp.h | 5 +
arch/arm64/include/asm/sysreg.h | 19 ++-
arch/arm64/include/asm/virt.h | 40 ++++++
arch/arm64/kernel/Makefile | 3 +
arch/arm64/kernel/cpu-reset.S | 57 ++++++++
arch/arm64/kernel/cpu-reset.h | 29 ++++
arch/arm64/kernel/crash_dump.c | 71 +++++++++
arch/arm64/kernel/head.S | 3 -
arch/arm64/kernel/hyp-stub.S | 49 +++++--
arch/arm64/kernel/machine_kexec.c | 270 +++++++++++++++++++++++++++++++++++
arch/arm64/kernel/relocate_kernel.S | 131 +++++++++++++++++
arch/arm64/kernel/setup.c | 7 +-
arch/arm64/kernel/smp.c | 56 ++++++++
arch/arm64/kvm/hyp-init.S | 47 +++++-
arch/arm64/kvm/hyp.S | 3 +-
arch/arm64/kvm/hyp/hyp-entry.S | 9 +-
arch/arm64/kvm/reset.c | 14 ++
arch/arm64/mm/cache.S | 2 -
arch/arm64/mm/init.c | 151 ++++++++++++++++++++
arch/arm64/mm/mmu.c | 11 ++
arch/arm64/mm/proc-macros.S | 98 -------------
arch/arm64/mm/proc.S | 3 -
include/uapi/linux/kexec.h | 1 +
41 files changed, 1291 insertions(+), 197 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