linux-stable.git/arch/tile/kernel/traps.c, branch v4.0

tile: Use the more common pr_warn instead of pr_warning

2014-11-11T20:51:42+00:00

And other message logging neatening.

Other miscellanea:

o coalesce formats
o realign arguments
o standardize a couple of macros
o use __func__ instead of embedding the function name

Signed-off-by: Joe Perches 
Signed-off-by: Chris Metcalf

tile: use ARRAY_SIZE

2014-10-02T14:19:32+00:00

ARRAY_SIZE is more concise to use when the size of an array is divided
by the size of its type or the size of its first element.

The semantic patch that makes this change is as follows:

// 
@i@
@@

@@
type T;
T[] E;
@@

- (sizeof(E)/sizeof(T))
+ ARRAY_SIZE(E)
// 

Signed-off-by: Himangi Saraogi 
Acked-by: Julia Lawall 
Signed-off-by: Chris Metcalf

replace strict_strto* call with kstrto*

2014-05-28T19:47:16+00:00

remove obsolete calls to strict_strto* and replace them
with kstrto* calls accordingly.

Signed-off-by: Daniel Walter 
Signed-off-by: Chris Metcalf

tile: use standard tile_bundle_bits type in traps.c

2013-09-03T18:53:22+00:00

We were rolling our own bundle_bits, which is unnecessary.

Signed-off-by: Chris Metcalf

tilegx: support KGDB

2013-09-03T18:51:26+00:00

Enter kernel debugger at boot with:
  --hvd UART_1=1 --hvx kgdbwait --hvx kgdboc=ttyS1,115200
or at runtime with:
  echo ttyS1,115200 > /sys/module/kgdboc/parameters/kgdboc
  echo g > /proc/sysrq-trigger

Signed-off-by: Chris Metcalf

tile: parameterize VA and PA space more cleanly

2013-09-03T18:47:34+00:00

The existing code relied on the hardware definition ()
to specify how much VA and PA space was available.  It's convenient
to allow customizing this for some configurations, so provide symbols
MAX_PA_WIDTH and MAX_VA_WIDTH in  that can be modified
if desired.

Additionally, move away from the MEM_XX_INTRPT nomenclature to
define the start of various regions within the VA space.  In fact
the cleaner symbol is, for example, MEM_SV_START, to indicate the
start of the area used for supervisor code; the actual address of the
interrupt vectors is not as important, and can be changed if desired.
As part of this change, convert from "intrpt1" nomenclature (which
built in the old privilege-level 1 model) to a simple "intrpt".

Also strip out some tilepro-specific code supporting modifying the
PL the kernel could run at, since we don't actually support using
different PLs in tilepro, only tilegx.

Signed-off-by: Chris Metcalf

tile: support kprobes on tilegx

2013-08-30T15:55:53+00:00

This change includes support for Kprobes, Jprobes and Return Probes.

Reviewed-by: Masami Hiramatsu 
Signed-off-by: Tony Lu 
Signed-off-by: Chris Metcalf

tile: improve illegal translation interrupt handling

2013-08-13T20:26:13+00:00

First, don't re-enable interrupts blindly in the Linux trap handler.
We already handle page faults this way; synchronous interrupts like
ILL_TRANS will fire even when interrupts are disabled, and we don't
want to re-enable interrupts in that case.

For ILL_TRANS, we now pass the ILL_VA_PC reason into the trap handler
so we can report it properly; this is the address that caused the
illegal translation trap.  We print the address as part of the
pr_alert() message now if it's coming from the kernel.

Signed-off-by: Chris Metcalf

arch/tile: add descriptive text if the kernel reports a bad trap

2012-05-25T16:48:28+00:00

If the kernel unexpectedly takes a bad trap, it's convenient to
have it report the type of trap as part of the error.  This gives
customers a bit more context before they call up customer support.

Signed-off-by: Chris Metcalf

arch/tile: fix up some minor trap handling issues

2012-04-02T16:12:52+00:00

We now respond to MEM_ERROR traps (e.g. an atomic instruction to
non-cacheable memory) with a SIGBUS.

We also no longer generate a console crash message if a user
process die due to a SIGTRAP.

Signed-off-by: Chris Metcalf