Takahiro Akashi 98d2e1539b arm64: kdump: protect crash dump kernel memory ...

arch_kexec_protect_crashkres() and arch_kexec_unprotect_crashkres()
are meant to be called by kexec_load() in order to protect the memory
allocated for crash dump kernel once the image is loaded.

The protection is implemented by unmapping the relevant segments in crash
dump kernel memory, rather than making it read-only as other archs do,
to prevent coherency issues due to potential cache aliasing (with
mismatched attributes).

Page-level mappings are consistently used here so that we can change
the attributes of segments in page granularity as well as shrink the region
also in page granularity through /sys/kernel/kexec_crash_size, putting
the freed memory back to buddy system.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

2017-04-05 18:28:35 +01:00

..

probes

arm64: kprobes: remove kprobe_exceptions_notify

2017-03-10 17:41:19 +00:00

vdso

arm64: Add support for CLOCK_MONOTONIC_RAW in clock_gettime() vDSO

2016-07-12 16:06:32 +01:00

.gitignore

arm64: Build infrastructure

2012-09-17 13:42:21 +01:00

acpi_numa.c

arm64/numa: avoid inconsistent information to be printed

2016-09-09 14:59:08 +01:00

acpi_parking_protocol.c

arm64: Use __pa_symbol for kernel symbols

2017-01-12 15:05:39 +00:00

acpi.c

ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() users

2016-12-21 02:36:38 +01:00

alternative.c

arm64: alternatives: apply boot time fixups via the linear mapping

2017-03-23 13:54:19 +00:00

arm64ksyms.c

arm: kernel: Add SMC structure parameter

2017-02-03 18:46:33 +00:00

armv8_deprecated.c

kprobes: move kprobe declarations to asm-generic/kprobes.h

2017-02-27 18:43:45 -08:00

asm-offsets.c

arm: kernel: Add SMC structure parameter

2017-02-03 18:46:33 +00:00

cacheinfo.c

arm64: cacheinfo: Remove CCSIDR-based cache information probing

2017-03-20 16:16:54 +00:00

cpu_errata.c

arm64: Work around Falkor erratum 1003

2017-02-10 11:22:12 +00:00

cpu_ops.c

arm64: apply __ro_after_init to some objects

2016-08-22 12:32:29 +01:00

cpu-reset.h

arm64: Use __pa_symbol for kernel symbols

2017-01-12 15:05:39 +00:00

cpu-reset.S

arm64: Add back cpu reset routines

2016-06-27 16:31:25 +01:00

cpufeature.c

arm64: cpufeature: Make ID reg accessor naming less counterintuitive

2017-04-04 16:55:41 +01:00

cpuidle.c

arm64: kernel: Update kerneldoc for cpu_suspend() rename

2017-03-10 18:06:24 +00:00

cpuinfo.c

arm64: v8.3: Support for weaker release consistency

2017-03-20 16:30:22 +00:00

debug-monitors.c

arm64: cpufeature: Make ID reg accessor naming less counterintuitive

2017-04-04 16:55:41 +01:00

efi-entry.S

arm64: efi-entry.S: avoid open-coded adr_l

2017-01-17 17:41:14 +00:00

efi-header.S

arm64: efi: split Image code and data into separate PE/COFF sections

2017-04-04 17:50:59 +01:00

efi.c

arm64: mm: replace 'block_mappings_allowed' with 'page_mappings_only'

2016-11-07 18:15:04 +00:00

entry32.S

arm64: entry32: remove pointless register assignment

2015-07-10 16:47:13 +01:00

entry-fpsimd.S

arm64: fpsimd: fix a typo in fpsimd_save_partial_state ENDPROC

2014-07-31 11:42:42 +01:00

entry-ftrace.S

arm64: include asm/assembler.h in entry-ftrace.S

2017-02-15 11:34:25 +00:00

entry.S

arm64: avoid returning from bad_mode

2017-01-19 15:38:22 +00:00

fpsimd.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>

2017-03-02 08:42:29 +01:00

ftrace.c

ftrace: Add return address pointer to ftrace_ret_stack

2016-08-24 12:15:14 +02:00

head.S

Merge branch 'arm64/common-sysreg' of git://git.kernel.org/pub/scm/linux/kernel/git/mark/linux into for-next/core

2017-04-04 18:08:47 +01:00

hibernate-asm.S

arm64: Introduce raw_{d,i}cache_line_size

2016-09-09 15:03:29 +01:00

hibernate.c

arm64: Use __pa_symbol for kernel symbols

2017-01-12 15:05:39 +00:00

hw_breakpoint.c

cpu/hotplug: Cleanup state names

2016-12-25 10:47:44 +01:00

hyp-stub.S

arm64: Add back cpu reset routines

2016-06-27 16:31:25 +01:00

image.h

arm64 updates for 4.7:

2016-05-16 17:17:24 -07:00

insn.c

kprobes: move kprobe declarations to asm-generic/kprobes.h

2017-02-27 18:43:45 -08:00

io.c

arm64: optimize memcpy_{from,to}io() and memset_io()

2014-11-06 17:25:27 +00:00

irq.c

arm64: remove irq_count and do_softirq_own_stack()

2015-12-21 17:26:01 +00:00

jump_label.c

jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP}

2015-08-03 11:34:12 +02:00

kaslr.c

arm64: apply __ro_after_init to some objects

2016-08-22 12:32:29 +01:00

kgdb.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

kuser32.S

arm64: Add __NR_* definitions for compat syscalls

2014-07-10 11:02:40 +01:00

machine_kexec.c

arm64: kdump: protect crash dump kernel memory

2017-04-05 18:28:35 +01:00

Makefile

arm64: relocation testing module

2017-04-04 17:03:32 +01:00

module-plts.c

arm64: add support for module PLTs

2016-02-24 14:57:24 +00:00

module.c

arm64: add support for kernel ASLR

2016-02-24 14:57:27 +00:00

module.lds

arm64: add support for module PLTs

2016-02-24 14:57:24 +00:00

paravirt.c

arm64: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops

2015-12-21 14:40:54 +00:00

pci.c

PCI/ACPI: Extend pci_mcfg_lookup() to return ECAM config accessors

2016-12-06 13:45:48 -06:00

perf_callchain.c

perf core: Add a 'nr' field to perf_event_callchain_context

2016-05-16 23:11:51 -03:00

perf_event.c

KVM: arm64: Fix the issues when guest PMCCFILTR is configured

2016-11-18 09:06:58 +00:00

perf_regs.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

process.c

arm64: drop unnecessary newlines in show_regs()

2017-03-23 14:20:41 +00:00

psci.c

arm64: Use __pa_symbol for kernel symbols

2017-01-12 15:05:39 +00:00

ptrace.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

reloc_test_core.c

arm64: relocation testing module

2017-04-04 17:03:32 +01:00

reloc_test_syms.S

arm64: relocation testing module

2017-04-04 17:03:32 +01:00

relocate_kernel.S

arm64: Introduce raw_{d,i}cache_line_size

2016-09-09 15:03:29 +01:00

return_address.c

arm64: factor out current_stack_pointer

2016-11-11 18:25:43 +00:00

setup.c

arm64: kdump: reserve memory for crash dump kernel

2017-04-05 18:26:57 +01:00

signal32.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

signal.c

arm64: Add uprobe support

2016-11-07 18:15:21 +00:00

sleep.S

arm64: move sp_el0 and tpidr_el1 into cpu_suspend_ctx

2016-11-11 18:25:44 +00:00

smccc-call.S

firmware: qcom: scm: Fix interrupted SCM calls

2017-02-03 18:46:33 +00:00

smp_spin_table.c

arm64: Use __pa_symbol for kernel symbols

2017-01-12 15:05:39 +00:00

smp.c

arm64: alternatives: apply boot time fixups via the linear mapping

2017-03-23 13:54:19 +00:00

stacktrace.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

suspend.c

arm64: move sp_el0 and tpidr_el1 into cpu_suspend_ctx

2016-11-11 18:25:44 +00:00

sys32.c

arm64: fix implementation of mmap2 compat syscall

2015-03-19 10:43:51 +00:00

sys_compat.c

sched/headers: Prepare for the reduction of <linux/sched.h>'s signal API dependency

2017-03-02 08:42:37 +01:00

sys.c

arm64: compat: Check for AArch32 state

2016-04-20 12:22:42 +01:00

time.c

arm64: ftrace: fix a stack tracer's output under function graph tracer

2015-12-21 17:26:02 +00:00

topology.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/topology.h>

2017-03-02 08:42:26 +01:00

trace-events-emulation.h

arm64: Trace emulation of AArch32 legacy instructions

2014-11-20 16:35:02 +00:00

traps.c

sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>

2017-03-02 08:42:37 +01:00

vdso.c

arm64: Use __pa_symbol for kernel symbols

2017-01-12 15:05:39 +00:00

vmlinux.lds.S

arm64: efi: split Image code and data into separate PE/COFF sections

2017-04-04 17:50:59 +01:00