linux-stable.git/arch/x86/platform, branch linux-3.3.y

x86/uv: Fix uninitialized spinlocks

2012-01-26T09:58:34+00:00

Initialize two spinlocks in tlb_uv.c and also properly define/initialize
the uv_irq_lock.

The lack of explicit initialization seems to be functionally
harmless, but it is diagnosed when these are turned on:

        CONFIG_DEBUG_SPINLOCK=y
        CONFIG_DEBUG_MUTEXES=y
        CONFIG_DEBUG_LOCK_ALLOC=y
        CONFIG_LOCKDEP=y

Signed-off-by: Cliff Wickman 
Cc: 
Cc: Dimitri Sivanich 
Link: http://lkml.kernel.org/r/E1RnXd1-0003wU-PM@eag09.americas.sgi.com
[ Added the uv_irq_lock initialization fix by Dimitri Sivanich ]
Signed-off-by: Ingo Molnar

Merge remote-tracking branch 'linus/master' into x86/urgent

2012-01-19T20:56:50+00:00

x86/UV2: Add accounting for BAU strong nacks

2012-01-17T08:09:59+00:00

This patch adds separate accounting of UV2 message "strong
nack's" in the BAU statistics.

Signed-off-by: Cliff Wickman 
Link: http://lkml.kernel.org/r/20120116212238.GF5767@sgi.com
Signed-off-by: Ingo Molnar

x86/UV2: Ack BAU interrupt earlier

2012-01-17T08:09:57+00:00

This patch moves the ack of the BAU interrupt to the beginning
of  the interrupt handler so that there is less possibility of a
lost interrupt and slower response to a shootdown message.

Signed-off-by: Cliff Wickman 
Link: http://lkml.kernel.org/r/20120116212146.GE5767@sgi.com
Signed-off-by: Ingo Molnar

x86/UV2: Remove stale no-resources test for UV2 BAU

2012-01-17T08:09:56+00:00

This patch removes an unnecessary test for a
no-destination-resources-available condition that looks like a
destination timeout in UV1, but is separately distinguishable in
UV2.

Signed-off-by: Cliff Wickman 
Link: http://lkml.kernel.org/r/20120116212050.GD5767@sgi.com
Signed-off-by: Ingo Molnar

x86/UV2: Work around BAU bug

2012-01-17T08:09:54+00:00

This patch implements a workaround for a UV2 hardware bug.
The bug is a non-atomic update of a memory-mapped register. When
hardware message delivery and software message acknowledge occur
simultaneously the pending message acknowledge for the arriving
message may be lost.  This causes the sender's message status to
stay busy.

Part of the workaround is to not acknowledge a completed message
until it is verified that no other message is actually using the
resource that is mistakenly recorded in the completed message.

Part of the workaround is to test for long elapsed time in such
a busy condition, then handle it by using a spare sending
descriptor. The stay-busy condition is eventually timed out by
hardware, and then the original sending descriptor can be
re-used. Most of that logic change is in keeping track of the
current descriptor and the state of the spares.

The occurrences of the workaround are added to the BAU
statistics.

Signed-off-by: Cliff Wickman 
Link: http://lkml.kernel.org/r/20120116211947.GC5767@sgi.com
Cc: 
Signed-off-by: Ingo Molnar

x86/UV2: Fix BAU destination timeout initialization

2012-01-17T08:09:53+00:00

Move the call to enable_timeouts() forward so that
BAU_MISC_CONTROL is initialized before using it in
calculate_destination_timeout().

Fix the calculation of a BAU destination timeout
for UV2 (in calculate_destination_timeout()).

Signed-off-by: Cliff Wickman 
Link: http://lkml.kernel.org/r/20120116211848.GB5767@sgi.com
Cc: 
Signed-off-by: Ingo Molnar

x86/UV2: Fix new UV2 hardware by using native UV2 broadcast mode

2012-01-17T08:09:51+00:00

Update the use of the Broadcast Assist Unit on SGI Altix UV2 to
the use of native UV2 mode on new hardware (not the legacy mode).

UV2 native mode has a different format for a broadcast message.
We also need quick differentiaton between UV1 and UV2.

Signed-off-by: Cliff Wickman 
Link: http://lkml.kernel.org/r/20120116211750.GA5767@sgi.com
Cc: 
Signed-off-by: Ingo Molnar

module_param: make bool parameters really bool (arch)

2012-01-12T23:02:18+00:00

module_param(bool) used to counter-intuitively take an int.  In
fddd5201 (mid-2009) we allowed bool or int/unsigned int using a messy
trick.

It's time to remove the int/unsigned int option.  For this version
it'll simply give a warning, but it'll break next kernel version.

Signed-off-by: Rusty Russell

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

2012-01-12T03:13:40+00:00

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/intel config: Fix the APB_TIMER selection
  x86/mrst: Add additional debug prints for pb_keys
  x86/intel config: Revamp configuration to allow for Moorestown and Medfield
  x86/intel/scu/ipc: Match the changes in the x86 configuration
  x86/apb: Fix configuration constraints
  x86: Fix INTEL_MID silly
  x86/Kconfig: Cyclone-timer depends on x86-summit
  x86: Reduce clock calibration time during slave cpu startup
  x86/config: Revamp configuration for MID devices
  x86/sfi: Kill the IRQ as id hack