linux-toradex.git/arch/x86/kernel/machine_kexec_32.c, branch v3.0.63

Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-12-08T21:27:33+00:00

* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (36 commits)
  x86, mm: Correct the implementation of is_untracked_pat_range()
  x86/pat: Trivial: don't create debugfs for memtype if pat is disabled
  x86, mtrr: Fix sorting of mtrr after subtracting
  x86: Move find_smp_config() earlier and avoid bootmem usage
  x86, platform: Change is_untracked_pat_range() to bool; cleanup init
  x86: Change is_ISA_range() into an inline function
  x86, mm: is_untracked_pat_range() takes a normal semiclosed range
  x86, mm: Call is_untracked_pat_range() rather than is_ISA_range()
  x86: UV SGI: Don't track GRU space in PAT
  x86: SGI UV: Fix BAU initialization
  x86, numa: Use near(er) online node instead of roundrobin for NUMA
  x86, numa, bootmem: Only free bootmem on NUMA failure path
  x86: Change crash kernel to reserve via reserve_early()
  x86: Eliminate redundant/contradicting cache line size config options
  x86: When cleaning MTRRs, do not fold WP into UC
  x86: remove "extern" from function prototypes in 
  x86, mm: Report state of NX protections during boot
  x86, mm: Clean up and simplify NX enablement
  x86, pageattr: Make set_memory_(x|nx) aware of NX support
  x86, sleep: Always save the value of EFER
  ...

Fix up conflicts (added both iommu_shutdown and is_untracked_pat_range)
to 'struct x86_platform_ops') in
	arch/x86/include/asm/x86_init.h
	arch/x86/kernel/x86_init.c

x86, pageattr: Make set_memory_(x|nx) aware of NX support

2009-11-16T21:44:58+00:00

Make set_memory_x/set_memory_nx directly aware of if NX is supported
in the system or not, rather than requiring that every caller assesses
that support independently.

Signed-off-by: H. Peter Anvin 
Cc: Huang Ying 
Cc: Venkatesh Pallipadi 
Cc: Suresh Siddha 
Cc: Tejun Heo 
Cc: Tim Starling 
Cc: Hannes Eder 
LKML-Reference: <1258154897-6770-4-git-send-email-hpa@zytor.com>
Acked-by: Kees Cook

hw-breakpoints: cleanup HW Breakpoint registers before kexec

2009-06-02T20:47:00+00:00

This patch disables Hardware breakpoints before doing a 'kexec' on the machine
so that the cpu doesn't keep debug registers values which would be out of
sync for the new image.

Original-patch-by: Alan Stern 
Signed-off-by: K.Prasad 
Reviewed-by: Alan Stern 
Signed-off-by: Frederic Weisbecker

x86, kexec: fix crashdump panic with CONFIG_KEXEC_JUMP

2009-05-08T05:01:05+00:00

Tim Starling reported that crashdump will panic with kernel compiled
with CONFIG_KEXEC_JUMP due to null pointer deference in
machine_kexec_32.c: machine_kexec(), when deferencing
kexec_image. Refering to:

http://bugzilla.kernel.org/show_bug.cgi?id=13265

This patch fixes the BUG via replacing global variable reference:
kexec_image in machine_kexec() with local variable reference: image,
which is more appropriate, and will not be null.

Same BUG is in machine_kexec_64.c too, so fixed too in the same way.

[ Impact: fix crash on kexec ]

Reported-by: Tim Starling 
Signed-off-by: Huang Ying 
LKML-Reference: <1241751101.6259.85.camel@yhuang-dev.sh.intel.com>
Signed-off-by: H. Peter Anvin

x86, kexec: fix kexec x86 coding style

2009-03-11T01:13:25+00:00

Impact: Cleanup

Fix some coding style issue for kexec x86.

Signed-off-by: Huang Ying 
Signed-off-by: H. Peter Anvin

x86: kexec/i386: fix sparse warnings: Using plain integer as NULL pointer

2009-02-22T08:27:11+00:00

Fix these sparse warnings:

  arch/x86/kernel/machine_kexec_32.c:124:22: warning: Using plain integer as NULL pointer
  arch/x86/kernel/traps.c:950:24: warning: Using plain integer as NULL pointer

Signed-off-by: Hannes Eder 
Cc: trivial@kernel.org
Signed-off-by: Ingo Molnar

kexec/i386: setup kexec page table in C

2008-10-31T09:01:57+00:00

Impact: change the kexec bootstrap code implementation from assembly to C

This patch transforms the kexec page tables setup code from assembler
code to C code in machine_kexec_prepare. This improves readability and
reduces code line number.

Signed-off-by: Huang Ying 
Signed-off-by: Ingo Molnar

kexec/i386: allocate page table pages dynamically

2008-10-31T09:01:56+00:00

Impact: save .text size when kexec is built in but not loaded

This patch adds an architecture specific struct kimage_arch into
struct kimage. The pointers to page table pages used by kexec are
added to struct kimage_arch. The page tables pages are dynamically
allocated in machine_kexec_prepare instead of statically from BSS
segment. This will save up to 20k memory when kexec image is not
loaded.

Signed-off-by: Huang Ying 
Signed-off-by: Ingo Molnar

x86, kdump: fix invalid access on i386 sparsemem

2008-10-28T15:48:24+00:00

Impact: fix kdump crash on 32-bit sparsemem kernels

Since linux-2.6.27, kdump has failed on i386 sparsemem kernel.
1st-kernel gets a panic just before switching to 2nd-kernel.

The cause is that a kernel accesses invalid mem_section by
page_to_pfn(image->swap_page) at machine_kexec().
image->swap_page is allocated if kexec for hibernation, but
it is not allocated if kdump. So if kdump, a kernel should
not access the mem_section corresponding to image->swap_page.

The attached patch fixes this invalid access.

Signed-off-by: Ken'ichi Ohmichi 
Cc: kexec-ml 
Cc: Andrew Morton 
Signed-off-by: Ingo Molnar

kexec jump: fix for ftrace

2008-08-15T15:35:43+00:00

Ftrace depends on some processor state that we destroyed during kexec and
restored by restore_processor_state().  So save_processor_state() and
restore_processor_state() are moved into machine_kexec() and ftrace is
restored after restore_processor_state().

Signed-off-by: Huang Ying 
Cc: Pavel Machek 
Cc: "Rafael J. Wysocki" 
Cc: "Eric W. Biederman" 
Cc: Vivek Goyal 
Cc: Ingo Molnar 
Cc: Steven Rostedt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds