user/sven/linux.git/arch/arc/kernel, branch v4.10.3

ARC: [arcompact] brown paper bag bug in unaligned access delay slot fixup

2017-02-07T18:02:01Z

Reported-by: Jo-Philipp Wich Fixes: 9aed02feae57bf7 ("ARC: [arcompact] handle unaligned access delay slot") Cc: linux-kernel@vger.kernel.org Cc: linux-snps-arc@lists.infradead.org Cc: stable@vger.kernel.org Signed-off-by: Vineet Gupta Signed-off-by: Linus Torvalds

ARC: [arcompact] handle unaligned access delay slot corner case

2017-01-27T18:54:20Z

After emulating an unaligned access in delay slot of a branch, we pretend as the delay slot never happened - so return back to actual branch target (or next PC if branch was not taken). Curently we did this by handling STATUS32.DE, we also need to clear the BTA.T bit, which is disregarded when returning from original misaligned exception, but could cause weirdness if it took the interrupt return path (in case interrupt was acive too) One ARC700 customer ran into this when enabling unaligned access fixup for kernel mode accesses as well Cc: stable@vger.kernel.org Signed-off-by: Vineet Gupta

ARCv2: smp-boot: wake_flag polling by non-Masters needs to be uncached

2017-01-24T22:25:19Z

This is needed on HS38 cores, for setting up IO-Coherency aperture properly The polling could perturb the caches and coherecy fabric which could be wrong in the small window when Master is setting up IOC aperture etc in arc_cache_init() We do it only for ARCv2 based builds to not affect EZChip ARCompact based platform. Signed-off-by: Vineet Gupta

ARC: smp-boot: Decouple Non masters waiting API from jump to entry point

2017-01-24T19:12:28Z

For run-on-reset SMP configs, non master cores call a routine which waits until Master gives it a "go" signal (currently using a shared mem flag). The same routine then jumps off the well known entry point of all non Master cores i.e. @first_lines_of_secondary This patch moves out the last part into one single place in early boot code. This is better in terms of absraction (the wait API only waits) and returns, leaving out the "jump off to" part. In actual implementation this requires some restructuring of the early boot code as well as Master now jumps to BSS setup explicitly, vs. falling thru into it before. Technically this patch doesn't cause any functional change, it just moves the ugly #ifdef'ry from assembly code to "C" Signed-off-by: Vineet Gupta

ARCv2: MCIP: update the BCR per current changes

2017-01-24T19:05:59Z

Signed-off-by: Vineet Gupta

ARCv2: MCIP: Deprecate setting of affinity in Device Tree

2017-01-24T18:22:48Z

Ignore value of interrupt distribution mode for common interrupts in IDU since setting of affinity using value from Device Tree is deprecated in ARC. Originally it is done in idu_irq_xlate() function and it is semantically wrong and does not guaranty that an affinity value will be set properly. idu_irq_enable() function is better place for initialization of common interrupts. By default send all common interrupts to all available online CPUs. The affinity of common interrupts in IDU must be set manually since in some cases the kernel will not call irq_set_affinity() by itself: 1. When the kernel is not configured with support of SMP. 2. When the kernel is configured with support of SMP but upper interrupt controllers does not support setting of the affinity and cannot propagate it to IDU. Signed-off-by: Yuriy Kolerov Signed-off-by: Vineet Gupta

ARC: module: Fix !CONFIG_ARC_DW2_UNWIND builds

2017-01-18T19:17:44Z

commit d65283f7b695b5 added mod->arch.secstr under CONFIG_ARC_DW2_UNWIND, but used it unconditionally which broke builds when the option was disabled. Fix that by adjusting the #ifdef guard. And while at it add a missing guard (for unwinder) in module.c as well Reported-by: Waldemar Brodkorb Cc: stable@vger.kernel.org #4.9 Fixes: d65283f7b695b5 ("ARC: module: elide loop to save reference to .eh_frame") Tested-by: Anton Kolesov Reviewed-by: Alexey Brodkin [abrodkin: provided fixlet to Kconfig per failure in allnoconfig build] Signed-off-by: Vineet Gupta

ARCv2: IRQ: Call entry/exit functions for chained handlers in MCIP

2017-01-05T01:12:11Z

It is necessary to call entry/exit functions for parent interrupt controllers for proper masking/unmasking of interrupt lines. Signed-off-by: Yuriy Kolerov Signed-off-by: Vineet Gupta

ARC: IRQ: Use hwirq instead of virq in mask/unmask

2017-01-05T01:12:10Z

It is necessary to use hwirq instead of virq when you communicate with an interrupt controller since there is no guaranty that virq numbers match hwirq numbers. Signed-off-by: Yuriy Kolerov Signed-off-by: Vineet Gupta

ARCv2: intc: default all interrupts to priority 1

2016-12-14T17:23:46Z

ARC HS Cores support configurable multiple interrupt priorities of upto 16 levels. In commit dec2b2849cfcc ("ARCv2: intc: Allow interruption by lowest priority interrupt") we switched to 15 which seems a bit excessive given that there would be rare hardware implementing so many preemption levels AND running Linux. It would seem that 2 levels will be more common so switch to 1 as the default priority level. This will be the "lower" priority level saving 0 for implementing NMI style support. This scheme also works in systems with more than 2 prioity levels as well. Signed-off-by: Vineet Gupta