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linux/arch/ia64/kernel
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Xunlei Pang 203e9e4121 kexec: move vmcoreinfo out of the kernel's .bss section 
As Eric said,
 "what we need to do is move the variable vmcoreinfo_note out of the
  kernel's .bss section. And modify the code to regenerate and keep this
  information in something like the control page.

  Definitely something like this needs a page all to itself, and ideally
  far away from any other kernel data structures. I clearly was not
  watching closely the data someone decided to keep this silly thing in
  the kernel's .bss section."

This patch allocates extra pages for these vmcoreinfo_XXX variables, one
advantage is that it enhances some safety of vmcoreinfo, because
vmcoreinfo now is kept far away from other kernel data structures.

Link: http://lkml.kernel.org/r/1493281021-20737-1-git-send-email-xlpang@redhat.com
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Tested-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Suggested-by: Eric Biederman <ebiederm@xmission.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Dave Young <dyoung@redhat.com>
Cc: Hari Bathini <hbathini@linux.vnet.ibm.com>
Cc: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-07-12 16:25:59 -07:00
..
.gitignore
acpi-ext.c ACPICA: Resources: Provide common part for struct acpi_resource_address structures. 2015-01-26 16:09:56 +01:00
acpi.c x86/ACPI: keep x86_cpu_to_acpiid mapping valid on CPU hotplug 2017-02-07 13:34:56 +01:00
asm-offsets.c ia64: Remove unused IA64_TASK_SIGHAND_OFFSET and IA64_SIGHAND_SIGLOCK_OFFSET 2017-04-17 21:53:08 -05:00
audit.c [IA64] Remove COMPAT_IA32 support 2010-02-08 10:42:17 -08:00
brl_emu.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
crash_dump.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
crash.c ia64: reuse append_elf_note() and final_note() functions 2017-05-08 17:15:11 -07:00
cyclone.c clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
dma-mapping.c treewide: Constify most dma_map_ops structures 2017-01-24 12:23:35 -05:00
efi_stub.S
efi.c ia64: efi: use timespec64 for persistent clock 2016-06-17 13:45:05 -07:00
elfcore.c switch elf_core_write_extra_data() to dump_emit() 2013-11-09 00:16:23 -05:00
entry.h
entry.S sched/core: Remove unused prefetch_stack() 2017-03-03 01:45:38 +01:00
err_inject.c ia64/err-inject: Convert to hotplug state machine 2016-11-09 23:45:29 +01:00
esi_stub.S ia64: move exports to definitions 2016-08-07 23:55:50 -04:00
esi.c tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
fsys.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
fsyscall_gtod_data.h clocksource: Use a plain u64 instead of cycle_t 2016-12-25 11:04:12 +01:00
ftrace.c ia64: ftrace: Fix the comments for ftrace_modify_code() 2015-12-23 14:27:23 -05:00
gate-data.S Rename .data.gate to .data..gate. 2010-03-03 11:25:59 +01:00
gate.lds.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
gate.S ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
head.S ia64: Convert vtime to use nsec units directly 2017-02-01 09:14:02 +01:00
ia64_ksyms.c ia64: move exports to definitions 2016-08-07 23:55:50 -04:00
init_task.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
iosapic.c ia64: rename nop->iosapic_nop 2016-01-12 20:46:47 +02:00
irq_ia64.c ia64: remove deprecated cpus_ usage. 2015-03-10 13:54:38 +10:30
irq_lsapic.c ia64: Convert lsapic to new irq_chip functions 2011-03-29 14:48:02 +02:00
irq.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
ivt.S ia64: move exports to definitions 2016-08-07 23:55:50 -04:00
jprobes.S
kprobes.c ia64: ensure exception table search users include extable.h 2017-01-24 12:41:45 -05:00
machine_kexec.c kexec: move vmcoreinfo out of the kernel's .bss section 2017-07-12 16:25:59 -07:00
machvec.c Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
Makefile kbuild: Consolidate header generation from ASM offset information 2017-04-13 05:43:37 +09:00
Makefile.gate ia64: thin archives fix linking 2017-06-30 09:03:04 +09:00
mca_asm.S percpu: make percpu symbols in ia64 unique 2009-10-29 22:34:14 +09:00
mca_drv_asm.S
mca_drv.c Remove cast for kmalloc return value 2013-03-19 16:14:53 -07:00
mca_drv.h
mca.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h> 2017-03-02 08:42:35 +01:00
minstate.h ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
module.c ia64: fix module loading for gcc-5.4 2017-05-01 14:59:04 -07:00
msi_ia64.c ia64/irq: Use access helper irq_data_get_affinity_mask() 2015-07-27 13:36:37 +02:00
nr-irqs.c ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
numa.c ia64: fix up obsolete cpu function usage. 2015-03-05 15:25:04 +10:30
pal.S ia64: move exports to definitions 2016-08-07 23:55:50 -04:00
palinfo.c ia64/palinfo: Convert to hotplug state machine 2016-11-09 23:45:30 +01:00
patch.c ia64: remove paravirt code 2015-06-10 14:26:32 -07:00
pci-dma.c treewide: Constify most dma_map_ops structures 2017-01-24 12:23:35 -05:00
pci-swiotlb.c treewide: Constify most dma_map_ops structures 2017-01-24 12:23:35 -05:00
perfmon_default_smpl.c Fix common misspellings 2011-03-31 11:26:23 -03:00
perfmon_generic.h
perfmon_itanium.h
perfmon_mckinley.h
perfmon_montecito.h
perfmon.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 sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
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
relocate_kernel.S percpu: make percpu symbols in ia64 unique 2009-10-29 22:34:14 +09:00
sal.c
salinfo.c ia64/salinfo: Replace racy task affinity logic 2017-04-15 12:20:53 +02:00
setup.c sched/headers: Move task->mm handling methods to <linux/sched/mm.h> 2017-03-03 01:43:28 +01:00
sigframe.h
signal.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
smp.c ia64: fix up obsolete cpu function usage. 2015-03-05 15:25:04 +10:30
smpboot.c arch/hotplug: Call into idle with a proper state 2016-03-01 20:36:57 +01:00
stacktrace.c [IA64] Add CONFIG_STACKTRACE_SUPPORT 2010-09-23 13:52:07 -07:00
sys_ia64.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
time.c sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h> 2017-03-02 08:42:39 +01:00
topology.c ia64/topology: Remove cpus_allowed manipulation 2017-04-15 12:20:52 +02:00
traps.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/debug.h> 2017-03-02 08:42:34 +01:00
unaligned.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
uncached.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/nmi.h> 2017-03-02 08:42:30 +01:00
unwind_decoder.c
unwind_i.h
unwind.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
vmlinux.lds.S debug: Fix __bug_table[] in arch linker scripts 2017-04-03 10:22:40 +02:00