linux-toradex.git/arch/arm/kernel/machine_kexec.c, branch v3.2.31

Revert "ARM: 7098/1: kdump: copy kernel relocation code at the kexec prepare stage"

2011-11-07T19:04:36+00:00

This reverts commit 2b034922af2caa19df86f0c502e76cb6f6e910f9.

Will Deacon reports:

This is causing kexec to fail.

The symptoms are that the .init.text section is not loaded as part of the
new kernel image, so when we try to do the SMP/UP fixups we hit a whole sea
of poison left there by the previous kernel.

So my guess is that machine_kexec_prepare *is* too early for preparing the
reboot_code_buffer and, unless anybody has a good reason not to, I'd like to
revert the patch causing these problems.

Reported-by: Will Deacon

ARM: 7098/1: kdump: copy kernel relocation code at the kexec prepare stage

2011-10-17T08:13:41+00:00

This copy really don't need to do at the very second before the kernel
would crash.

Signed-off-by: Lei Wen 
Acked-by: Simon Horman 
Signed-off-by: Russell King

[ARM] add machine-specific hook to machine_kexec

2011-03-03T21:26:55+00:00

Provide the option to call a machine-specific function
before kexec'ing a new kernel.

Signed-off-by: Eric Cooper 
Signed-off-by: Nicolas Pitre

ARM: 6522/1: kexec: Add call to non-crashing cores through IPI

2010-12-04T11:02:04+00:00

When kexec is used to start a crash kernel the other cores
are notified. These non-crashing cores will save their state
in the crash notes and then do nothing.

Signed-off-by: Per Fransson 
Signed-off-by: Russell King

arm: Disable outer (L2) cache in kexec

2010-10-26T06:09:56+00:00

kexec does not disable the outer cache before disabling the inner
caches in cpu_proc_fin(). So L2 is enabled across the kexec jump. When
the new kernel enables chaches again, it randomly crashes.

Disabling L2 before calling cpu_proc_fin() cures the problem.

Disabling L2 requires the following new functions: flush_all(),
inv_all() and disable(). Add them to outer_cache_fns and call them
from the kexec code.

Signed-off-by: Thomas Gleixner 
Acked-by: Catalin Marinas 
Acked-by: Linus Walleij

Merge branch 'misc' into devel

2010-07-31T13:20:02+00:00

Conflicts:
	arch/arm/mm/init.c

ARM: call machine_shutdown() from machine_halt(), etc

2010-07-27T09:48:43+00:00

x86 calls machine_shutdown() from the various machine_*() calls which
take the machine down ready for halting, restarting, etc, and uses
this to bring the system safely to a point where those actions can be
performed.  Such actions are stopping the secondary CPUs.

So, change the ARM implementation of these to reflect what x86 does.

This solves kexec problems on ARM SMP platforms, where the secondary
CPUs were left running across the kexec call.

Signed-off-by: Russell King

ARM: Factor out common code from cpu_proc_fin()

2010-07-27T09:48:42+00:00

All implementations of cpu_proc_fin() start by disabling interrupts
and then flush caches.  Rather than have every processors proc_fin()
implementation do this, move it out into generic code - and move the
cache flush past setup_mm_for_reboot() (so it can benefit from having
caches still enabled.)

This allows cpu_proc_fin() to become independent of the L1/L2 cache
types, and eventually move the L2 cache flushing into the L2 support
code.

Signed-off-by: Russell King

ARM: 6118/1: kdump: implement machine_crash_shutdown()

2010-07-09T14:00:52+00:00

Implement function machine_crash_shutdown() which disables IRQs and
saves machine state to ELF notes structure.

Signed-off-by: Mika Westerberg 
Signed-off-by: Russell King

[ARM] Storage class should be before const qualifier

2009-02-10T09:59:19+00:00

The C99 specification states in section 6.11.5:

The placement of a storage-class specifier other than at the beginning of the
declaration specifiers in a declaration is an obsolescent feature.

Signed-off-by: Tobias Klauser 
Signed-off-by: Russell King