Commit Graph

20 Commits

Author SHA1 Message Date
Paul Mundt c06fd28387 sh64: Migrate to __update_tlb() API.
Now that we have a method for finding out if we're handling an ITLB fault
or not without passing it all the way down the chain, it's possible to
use the __update_tlb() interface in place of a special __do_tlb_refill().

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-05-14 15:52:28 +09:00
Paul Mundt 28080329ed sh: Enable shared page fault handler for _32/_64.
This moves the now generic _32 page fault handling code to a shared place
and adapts the _64 implementation to make use of it.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-05-14 15:33:28 +09:00
Paul Mundt 9a7b7739f9 sh64: Utilize thread fault code encoding.
This plugs in fault code encoding for the sh64 page fault, too.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-05-14 15:07:52 +09:00
Paul Mundt b2212ea41d sh64: Kill off unused trap_no/error_code from thread_struct.
While the trap number and error code are passed around for debugging
purposes, this occurs wholly independently of the thread struct values.
These values were never part of the sigcontext ABI and are thus never
passed anywhere, so we can just kill them off across the board.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-04-19 17:52:20 +09:00
Paul Mundt ba2a3cdf76 sh64: Kill off dead page fault debug cruft.
In the future we'll be unifying some of the 32/64 page fault path, so
start to tidy up the _64 one by killing off some of the unused debug
cruft.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-04-11 12:53:06 +09:00
Paul Mundt a1e2030122 sh64: Port OOM changes to do_page_fault
Reflect the sh32 OOM changes for the sh64 page fault handler, too.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2012-04-11 12:44:50 +09:00
David Howells e839ca5287 Disintegrate asm/system.h for SH
Disintegrate asm/system.h for SH.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-sh@vger.kernel.org
2012-03-28 18:30:03 +01:00
Peter Zijlstra a8b0ca17b8 perf: Remove the nmi parameter from the swevent and overflow interface
The nmi parameter indicated if we could do wakeups from the current
context, if not, we would set some state and self-IPI and let the
resulting interrupt do the wakeup.

For the various event classes:

  - hardware: nmi=0; PMI is in fact an NMI or we run irq_work_run from
    the PMI-tail (ARM etc.)
  - tracepoint: nmi=0; since tracepoint could be from NMI context.
  - software: nmi=[0,1]; some, like the schedule thing cannot
    perform wakeups, and hence need 0.

As one can see, there is very little nmi=1 usage, and the down-side of
not using it is that on some platforms some software events can have a
jiffy delay in wakeup (when arch_irq_work_raise isn't implemented).

The up-side however is that we can remove the nmi parameter and save a
bunch of conditionals in fast paths.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Michael Cree <mcree@orcon.net.nz>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Eric B Munson <emunson@mgebm.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/n/tip-agjev8eu666tvknpb3iaj0fg@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-07-01 11:06:35 +02:00
Paul Mundt 59615ecdb5 sh: Provide a global TLB flush for U/I-TLB clear.
This provides a sledgehammer approach for clearing the TLBs, only to be
used in cases where we know we will never want to use the mappings again
and have no interest in preserving state. This also destroys wired
entries.

The primary use for this is when we are either entering or exiting the
kernel completely, in the latter case as a precursor for CPU reset by
MMU.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-07-02 15:44:09 +09:00
Paul Mundt 364b97d9e2 sh: Kill off dangling goto labels from oom-killer rework.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-26 16:15:17 +09:00
Nick Piggin 6b6b18e62c sh: invoke oom-killer from page fault
As explained in commit 1c0fe6e3bd, we want to call the architecture independent
oom killer when getting an unexplained OOM from handle_mm_fault, rather than
simply killing current.

Cc: linux-sh@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-04-26 15:47:01 +09:00
Matt Fleming 24ef7fc4dc sh: Acquire some more page flags for SH-5.
We need some more page flags to hook up _PAGE_WIRED (and eventually
other things). So use the unused PTE bits above the PPN field as no
implementations use these for anything currently.

Now that we have _PAGE_WIRED let's provide the SH-5 functions for wiring
up TLB entries.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
2010-01-16 14:29:06 +00:00
Ingo Molnar cdd6c482c9 perf: Do the big rename: Performance Counters -> Performance Events
Bye-bye Performance Counters, welcome Performance Events!

In the past few months the perfcounters subsystem has grown out its
initial role of counting hardware events, and has become (and is
becoming) a much broader generic event enumeration, reporting, logging,
monitoring, analysis facility.

Naming its core object 'perf_counter' and naming the subsystem
'perfcounters' has become more and more of a misnomer. With pending
code like hw-breakpoints support the 'counter' name is less and
less appropriate.

All in one, we've decided to rename the subsystem to 'performance
events' and to propagate this rename through all fields, variables
and API names. (in an ABI compatible fashion)

The word 'event' is also a bit shorter than 'counter' - which makes
it slightly more convenient to write/handle as well.

Thanks goes to Stephane Eranian who first observed this misnomer and
suggested a rename.

User-space tooling and ABI compatibility is not affected - this patch
should be function-invariant. (Also, defconfigs were not touched to
keep the size down.)

This patch has been generated via the following script:

  FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')

  sed -i \
    -e 's/PERF_EVENT_/PERF_RECORD_/g' \
    -e 's/PERF_COUNTER/PERF_EVENT/g' \
    -e 's/perf_counter/perf_event/g' \
    -e 's/nb_counters/nb_events/g' \
    -e 's/swcounter/swevent/g' \
    -e 's/tpcounter_event/tp_event/g' \
    $FILES

  for N in $(find . -name perf_counter.[ch]); do
    M=$(echo $N | sed 's/perf_counter/perf_event/g')
    mv $N $M
  done

  FILES=$(find . -name perf_event.*)

  sed -i \
    -e 's/COUNTER_MASK/REG_MASK/g' \
    -e 's/COUNTER/EVENT/g' \
    -e 's/\<event\>/event_id/g' \
    -e 's/counter/event/g' \
    -e 's/Counter/Event/g' \
    $FILES

... to keep it as correct as possible. This script can also be
used by anyone who has pending perfcounters patches - it converts
a Linux kernel tree over to the new naming. We tried to time this
change to the point in time where the amount of pending patches
is the smallest: the end of the merge window.

Namespace clashes were fixed up in a preparatory patch - and some
stylistic fallout will be fixed up in a subsequent patch.

( NOTE: 'counters' are still the proper terminology when we deal
  with hardware registers - and these sed scripts are a bit
  over-eager in renaming them. I've undone some of that, but
  in case there's something left where 'counter' would be
  better than 'event' we can undo that on an individual basis
  instead of touching an otherwise nicely automated patch. )

Suggested-by: Stephane Eranian <eranian@google.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <linux-arch@vger.kernel.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-21 14:28:04 +02:00
Paul Mundt 65305ae816 sh: Convert cache disabled SH-5 over to new cache interface.
The caches enabled case needs more work, but is presently broken
regardless, so this can be done incrementally.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-16 00:53:56 +09:00
Paul Mundt c7914834ef sh: Tidy up NEFF-based sign extension for SH-5.
This consolidates all of the NEFF-based sign extension for SH-5.
In the future the other SH code will need to make use of this as well,
so make it generic in preparation for more 32/64 consolidation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-08-04 17:14:39 +09:00
Paul Mundt 9cef749269 sh: update_mmu_cache() consolidation.
This splits out a separate __update_cache()/__update_tlb() for
update_mmu_cache() to wrap in to. This lets us share the common
__update_cache() bits while keeping special __update_tlb() handling
broken out.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-07-29 00:12:17 +09:00
Paul Mundt 163b2f0ba9 sh64: Hook up page fault events for software perf counters.
sh64 can use these as well, so tie them up there as well.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2009-06-25 02:49:03 +09:00
Linus Torvalds d06063cc22 Move FAULT_FLAG_xyz into handle_mm_fault() callers
This allows the callers to now pass down the full set of FAULT_FLAG_xyz
flags to handle_mm_fault().  All callers have been (mechanically)
converted to the new calling convention, there's almost certainly room
for architectures to clean up their code and then add FAULT_FLAG_RETRY
when that support is added.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-21 13:08:22 -07:00
Harvey Harrison 866e6b9e50 sh: replace remaining __FUNCTION__ occurrences
__FUNCTION__ is gcc-specific, use __func__

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-03-06 11:18:22 +09:00
Paul Mundt efddb4c882 sh: Rename the _32 and _64 TLB flush variants.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28 13:18:54 +09:00