linux-toradex.git/arch/powerpc/include/asm/processor.h, branch v3.4.73

Disintegrate asm/system.h for PowerPC

2012-03-28T17:30:02+00:00

Disintegrate asm/system.h for PowerPC.

Signed-off-by: David Howells 
Acked-by: Benjamin Herrenschmidt 
cc: linuxppc-dev@lists.ozlabs.org

powerpc/cpuidle: Handle power_save=off

2011-12-08T02:57:34+00:00

This patch makes pseries_idle_driver not to be registered when
power_save=off kernel boot option is specified. The
cpuidle_disable variable used here is similar to
its usage on x86. If cpuidle_disable is set then
sysfs entries for cpuidle framework are not created
and the required drivers are not loaded.

Signed-off-by: Deepthi Dharwar 
Signed-off-by: Trinabh Gupta 
Signed-off-by: Arun R Bharadwaj 
Signed-off-by: Benjamin Herrenschmidt

powerpc/cpuidle: Add cpu_idle_wait() to allow switching of idle routines

2011-12-08T02:54:58+00:00

This patch provides cpu_idle_wait() routine for the powerpc
platform which is required by the cpuidle subsystem. This
routine is required to change the idle handler on SMP systems.
The equivalent routine for x86 is in arch/x86/kernel/process.c
but the powerpc implementation is different.

cpuidle_disable variable is to enable/disable cpuidle
framework if power_save option is set during the boot
time.

Signed-off-by: Deepthi Dharwar 
Signed-off-by: Trinabh Gupta 
Signed-off-by: Arun R Bharadwaj 
Signed-off-by: Benjamin Herrenschmidt

powerpc/85xx: Save scratch registers to thread info instead of using SPRGs.

2011-06-23T02:44:55+00:00

We expect this is actually faster, and we end up needing more space than we
can get from the SPRGs in some instances.  This is also useful when running
as a guest OS - SPRGs4-7 do not have guest versions.

8 slots are allocated in thread_info for this even though we only actually
use 4 of them - this allows space for future code to have more scratch
space (and we know we'll need it for things like hugetlb).

Signed-off-by: Ashish Kalra 
Signed-off-by: Becky Bruce 
Signed-off-by: Kumar Gala

powerpc: Per process DSCR + some fixes (try#4)

2011-04-27T04:18:19+00:00

The DSCR (aka Data Stream Control Register) is supported on some
server PowerPC chips and allow some control over the prefetch
of data streams.

This patch allows the value to be specified per thread by emulating
the corresponding mfspr and mtspr instructions. Children of such
threads inherit the value. Other threads use a default value that
can be specified in sysfs - /sys/devices/system/cpu/dscr_default.

If a thread starts with non default value in the sysfs entry,
all children threads inherit this non default value even if
the sysfs value is changed later.

Signed-off-by: Alexey Kardashevskiy 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Removing undead ifdef KERNEL

2010-11-29T04:48:18+00:00

The __KERNEL__ ifdef isn't necessary at this point, because it is
checked in an outer ifdef level already and has no effect here.

Signed-off-by: Christian Dietrich 
Signed-off-by: Benjamin Herrenschmidt

powerpc: Use is_32bit_task() helper to test 32-bit binary

2010-09-02T04:07:32+00:00

This patch removes all explicit tests for the TIF_32BIT flag

Signed-off-by: Denis Kirjanov 
Signed-off-by: Benjamin Herrenschmidt

powerpc, hw_breakpoints: Implement hw_breakpoints for 64-bit server processors

2010-06-22T09:40:50+00:00

Implement perf-events based hw-breakpoint interfaces for PowerPC
64-bit server (Book III S) processors.  This allows access to a
given location to be used as an event that can be counted or
profiled by the perf_events subsystem.

This is done using the DABR (data breakpoint register), which can
also be used for process debugging via ptrace.  When perf_event
hw_breakpoint support is configured in, the perf_event subsystem
manages the DABR and arbitrates access to it, and ptrace then
creates a perf_event when it is requested to set a data breakpoint.

[Adopted suggestions from Paul Mackerras  to
- emulate_step() all system-wide breakpoints and single-step only the
  per-task breakpoints
- perform arch-specific cleanup before unregistration through
  arch_unregister_hw_breakpoint()
]

Signed-off-by: K.Prasad 
Signed-off-by: Paul Mackerras

KVM: PPC: Add SVCPU to Book3S_32

2010-05-17T09:18:43+00:00

We need to keep the pointer to the shadow vcpu somewhere accessible from
within really early interrupt code. The best fit I found was the thread
struct, as that resides in an SPRG.

So let's put a pointer to the shadow vcpu in the thread struct and add
an asm-offset so we can find it.

Signed-off-by: Alexander Graf 
Signed-off-by: Avi Kivity

powerpc/booke: Add definitions for advanced debug registers

2010-02-17T03:03:17+00:00

powerpc/booke: Add definitions for advanced debug registers

From: Dave Kleikamp 

Based on patches originally written by Torez Smith.

This patch adds additional definitions for BookE Debug Registers
to the reg_booke.h header file.

Signed-off-by: Dave Kleikamp 
Acked-by: David Gibson 
Cc: Torez Smith  
Cc: Benjamin Herrenschmidt 
Cc: Josh Boyer 
Cc: Kumar Gala 
Cc: Sergio Durigan Junior 
Cc: Thiago Jung Bauermann 
Cc: linuxppc-dev list 
Signed-off-by: Benjamin Herrenschmidt