linux-toradex.git/arch/mips/netlogic, branch v4.2.7

MIPS: SMP: Don't increment irq_count multiple times for call function IPIs

2015-08-03T07:25:12+00:00

The majority of SMP platforms handle their IPIs through do_IRQ()
which calls irq_{enter/exit}(). When a call function IPI is received,
smp_call_function_interrupt() is called which also calls
irq_{enter,exit}(), meaning irq_count is raised twice.

When tick broadcasting is used (which is implemented via a call
function IPI), this incorrectly causes all CPU idle time on the core
receiving broadcast ticks to be accounted as time spent servicing
IRQs, as account_process_tick() will account as such if irq_count is
greater than 1. This results in 100% CPU usage being reported on a
core which receives its ticks via broadcast.

This patch removes the SMP smp_call_function_interrupt() wrapper which
calls irq_{enter,exit}(). Platforms which handle their IPIs through
do_IRQ() now call generic_smp_call_function_interrupt() directly to
avoid incrementing irq_count a second time. Platforms which don't
(loongson, sgi-ip27, sibyte) call generic_smp_call_function_interrupt()
wrapped in irq_{enter,exit}().

Signed-off-by: Alex Smith 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10770/
Signed-off-by: Ralf Baechle

MIPS: netlogic: remove unnecessary MTD partition probe specification

2015-06-21T19:52:43+00:00

The cmdlinepart parser is already supported in the default probe.

Signed-off-by: Brian Norris 
Cc: linux-mtd@lists.infradead.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10071/
Signed-off-by: Ralf Baechle

Merge branch '4.0-fixes' into mips-for-linux-next

2015-04-13T14:03:32+00:00

MIPS: Netlogic: Fix for SATA PHY init

2015-04-10T13:41:43+00:00

Update to the SATA PHY initialization. This is needed for SATA detection
to succeed in all configurations.

Signed-off-by: Ganesan Ramalingam 
Signed-off-by: Jayachandran C 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8886/
Signed-off-by: Ralf Baechle

MIPS: Netlogic: Fix double inclusion of .

2015-04-07T23:10:51+00:00

Signed-off-by: Ralf Baechle

MIPS: Netlogic: Add built-in dts for XLP5xx boards

2015-04-01T15:21:54+00:00

Signed-off-by: Ganesan Ramalingam 
Signed-off-by: Jayachandran C 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8896/
Signed-off-by: Ralf Baechle

MIPS: Netlogic: i2c IRQ mappings for XLP9XX

2015-04-01T15:21:53+00:00

The new I2C block in XLP9XX has 4 interrupts, add the mapping for
these in nlm_hal.c

Signed-off-by: Subhendu Sekhar Behera 
Signed-off-by: Jayachandran C 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8897/
Signed-off-by: Ralf Baechle

MIPS: Netlogic: Add irq mapping and setup for XHCI port 3

2015-04-01T15:21:53+00:00

Add support for third XHCI port in XLPII processors.

Signed-off-by: Ganesan Ramalingam 
Signed-off-by: Jayachandran C 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8895/
Signed-off-by: Ralf Baechle

MIPS: Netlogic: Do not enable SUE for core

2015-04-01T15:21:53+00:00

Enabling the SUE bit for core can can result in rare cache errors
which are difficult to track down, so do not enable it. This can
cause a minor performance loss in some tests.

Signed-off-by: Jayachandran C 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8894/
Signed-off-by: Ralf Baechle

MIPS: Netlogic: Handle XLP hardware errata

2015-04-01T15:21:52+00:00

Core configuration register IFU_BRUB_RESERVE has to be setup to handle
a silicon errata which can result in a CPU hang.

Signed-off-by: Jayachandran C 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8902/
Signed-off-by: Ralf Baechle