BMC/Intel-BMC/linux.git/arch/arm/mm/alignment.c, branch dev

ARM: 8322/1: keep .text and .fixup regions closer together

2015-03-29T22:11:56+00:00

This moves all fixup snippets to the .text.fixup section, which is a special section that gets emitted along with the .text section for each input object file, i.e., the snippets are kept much closer to the code they refer to, which helps prevent linker failure on large kernels. Acked-by: Nicolas Pitre Signed-off-by: Ard Biesheuvel Signed-off-by: Russell King

ARM: convert printk(KERN_* to pr_*

2014-11-21T15:24:50+00:00

Convert many (but not all) printk(KERN_* to pr_* to simplify the code. We take the opportunity to join some printk lines together so we don't split the message across several lines, and we also add a few levels to some messages which were previously missing them. Tested-by: Andrew Lunn Tested-by: Felipe Balbi Signed-off-by: Russell King

ARM: 8165/1: alignment: don't break misaligned NEON load/store

2014-09-25T14:32:57+00:00

The alignment fixup incorrectly decodes faulting ARM VLDn/VSTn instructions (where the optional alignment hint is given but incorrect) as LDR/STR, leading to register corruption. Detect these and correctly treat them as unhandled, so that userspace gets the fault it expects. Reported-by: Simon Hosie Signed-off-by: Robin Murphy Cc: Signed-off-by: Russell King

ARM: alignment: save last kernel aligned fault location

2014-07-18T11:29:06+00:00

Save and report (via the procfs file) the last kernel unaligned fault location. This allows us to trivially inspect where the last fault happened for cases which we don't expect to occur. Since we expect the kernel to generate misalignment faults (due to the networking layer), even when warnings are enabled, we don't log them for the kernel. Tested-by: Tony Lindgren Acked-by: Catalin Marinas Signed-off-by: Russell King

ARM: remove global cr_no_alignment

2014-06-02T08:20:18+00:00

cr_no_alignment is really only used by the alignment code. Since we no longer change the setting of cr_alignment after boot, we can localise this to alignment.c Signed-off-by: Russell King

ARM: remove CPU_CP15 conditional from alignment.c

2014-06-02T08:20:16+00:00

alignment.c will not be built unless CPU_CP15 is set: config CPU_CP15 bool config CPU_CP15_MMU bool select CPU_CP15 config ALIGNMENT_TRAP bool depends on CPU_CP15_MMU So there's no point having conditionals on CPU_CP15 within this code. Signed-off-by: Russell King

ARM: move "noalign" command line option to alignment.c

2014-06-02T08:20:13+00:00

Keep all bits of alignment handling together. Signed-off-by: Russell King

ARM: provide common method to clear bits in CPU control register

2014-06-02T08:20:11+00:00

Several places open-code this manipulation, let's consolidate this. Signed-off-by: Russell King

ARM: use get_cr() rather than cr_alignment

2014-05-22T15:27:27+00:00

Rather than reading the cr_alignment variable, use get_cr() to read directly from the hardware instead. We have two places where this occurs, neither of them are performance critical. Signed-off-by: Russell King

ARM: alignment: correctly decode instructions in BE8 mode.

2013-10-19T19:46:34+00:00

If we are in BE8 mode, we must deal with the instruction stream being in LE order when data is being loaded in BE order. Ensure the data is swapped before processing to avoid thre following: Change to using to provide the necessary conversion functions to change the byte ordering. This stops the following warning messages from the kernel on a fault: Unhandled fault: alignment exception (0x001) at 0xbfa09567 Alignment trap: not handling instruction 030091e8 at [<80333e8c>] Signed-off-by: Ben Dooks Reviewed-by: Dave Martin Tested-by: Thomas Petazzoni