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* Don't call set_tsk_need_resched() on remote LITMUS^RT taskBjoern Brandenburg2014-10-21
| | | | | This patch fixes a BUG_ON() in litmus/preempt.c:33 reported by Felipe Cerqueira & Manohar Vanga.
* Hook into rt scheduling class to protect LITMUS^RT tasksBjoern Brandenburg2014-10-21
| | | | | | The rt scheduling class thinks it's the highest-priority scheduling class around. It is not in LITMUS^RT. Don't go preempting remote cores that run SCHED_LITMUS tasks.
* Don't trigger load balancer in scheduler tick for LITMUS^RTBjoern Brandenburg2014-10-21
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* Cache 'prev' in LITMUS^RT runqueueBjoern Brandenburg2014-10-21
| | | | | | LITMUS^RT plugins like to know who 'prev' is. pick_next_task() doesn't expose that info, so we just cache prev in the runqueue. Could robably be replaced by looking at 'current' instead.
* Hook into finish_switch()Bjoern Brandenburg2014-10-21
| | | | To keep track of stack usage and to notify plugin, if necessary.
* Reset SCHED_LITMUS scheduling class on forkBjoern Brandenburg2014-10-21
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* Block sched_setaffinity() for SCHED_LITMUS tasksBjoern Brandenburg2014-10-21
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* Integrate LITMUS^RT scheduling class with sched_setschedulerBjoern Brandenburg2014-10-21
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* Disable cut-to-CFS optimization in Linux schedulerBjoern Brandenburg2014-10-21
| | | | | Global plugins require that the plugin be called even if there currently is no real-time task executing on the local core.
* Integrate LITMUS^RT with try_to_wake_up() pathBjoern Brandenburg2014-10-21
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* Make LITMUS^RT scheduling class the highest-priority scheduling classBjoern Brandenburg2014-10-21
| | | | | | Needs to be above stop_machine_class for legacy reasons; the main plugins were developed before stop_machine_class was introduced and assume that they are the highest-priority scheduling class.
* Add LITMUS^RT scheduling class in kernel/sched/MakefileBjoern Brandenburg2014-10-21
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* Introduce LITMUS^RT runqueue dummy into struct rqBjoern Brandenburg2014-10-21
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* Integrate SRP ceiling blocking callback with Linux schedulerBjoern Brandenburg2014-10-21
| | | | Check whether a suspension is required at end of schedule().
* Hookup sched_trace_XXX() tracing in Linux schedulerBjoern Brandenburg2014-10-21
| | | | This patch adds context switch tracing to the main Linux scheduler.
* Augment rt_task() with is_realtime()Bjoern Brandenburg2014-10-21
| | | | | | | | | | | Whenever the kernel checks for rt_task() to avoid delaying real-time tasks, we want it to also not delay LITMUS^RT tasks. Hence, most calls to rt_task() should be matched by an equivalent call to is_realtime(). Notably, this affects the implementations of select() and nanosleep(), which use timer_slack_ns when setting up timers for non-real-time tasks.
* Hook into fork(), exec(), and exit()Bjoern Brandenburg2014-10-21
| | | | | Allow LITMUS^RT to do some work when a process is created or terminated.
* Call sched_state_task_picked() from pick_next_task_stop()Bjoern Brandenburg2014-10-21
| | | | | Otherwise, the scheduler state machine becomes confused (and goes into a rescheduling loop) when stop-machine is triggered.
* Integrate preemption state machine with Linux schedulerBjoern Brandenburg2014-10-21
| | | | Track when a processor is going to schedule "soon".
* Record LITMUS^RT timestamp in ftrace recordsGlenn Elliott2014-10-21
| | | | | Patch updates ftrace.h to record a litmus_clock() time stamp in ftrace records.
* Move trace point definition to litmus/litmus.cBjoern Brandenburg2014-10-21
| | | | | | | | If !CONFIG_SCHED_TASK_TRACE, but CONFIG_SCHED_LITMUS_TRACEPOINT, then we still need to define the tracepoint structures. This patch should be integrated with the earlier sched_task_trace.c patches during one of the next major rebasing efforts.
* Add LITMUS^RT syscalls for x86Bjoern Brandenburg2014-10-21
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* Add LITMUS^RT syscalls for ARMBjoern Brandenburg2014-10-21
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* Add LITMUS^RT core implementationBjoern Brandenburg2014-10-21
| | | | | | | | | | | | | This patch adds the core of LITMUS^RT: - library functionality (heaps, rt_domain, prioritization, etc.) - budget enforcement logic - job management - system call backends - virtual devices (control page, etc.) - scheduler plugin API (and dummy plugin) This code compiles, but is not yet integrated with the rest of Linux.
* Export num_cache_leaves in asm/processor.hBjoern Brandenburg2014-10-21
| | | | This is required to make litmus/affinity.c compile.
* Add object descriptor table to Linux's task_structBjoern Brandenburg2014-10-21
| | | | | This table is similar to a file descriptor table. It keeps track of which "objects" (locks) a real-time task holds a handle to.
* Add tracepoint supportBjoern Brandenburg2014-10-21
| | | | | | | This patch integrates LITMUS^RT's sched_trace_XXX() macros with Linux's notion of tracepoints. This is useful to visualize schedules in kernel shark and similar tools. Historically, LITMUS^RT's sched_trace predates Linux's tracepoint infrastructure.
* Add schedule tracing supportBjoern Brandenburg2014-10-21
| | | | | | This patch introduces the sched_trace infrastructure, which in principle allows tracing the generated schedule. However, this patch does not yet integrate the callbacks with the kernel.
* Feather-Trace: write interrupt counts to control pageBjoern Brandenburg2014-10-21
| | | | | This patch exports the interrupt counter to userspace via the control page.
* Feather-Trace: use proper definition of is_realtime()Bjoern Brandenburg2014-10-21
| | | | Remove dummy implementation of is_realtime() in trace.c.
* Introduce main LITMUS^RT headerBjoern Brandenburg2014-10-21
| | | | | This patch adds a basic litmus/litmus.h, which is required for basic LITMUS^RT infrastructure to compile.
* Extend task_struct with rt_paramBjoern Brandenburg2014-10-21
| | | | This patch adds the PCB extensions required for LITMUS^RT.
* Add hrtimer_start_on() supportFelipe Cerqueira2014-10-21
| | | | | | This patch adds hrtimer_start_on(), which allows arming timers on remote CPUs. This is needed to avoided timer interrupts on "shielded" CPUs and is also useful for implementing semi-partitioned schedulers.
* Add TRACE() debug tracing supportBjoern Brandenburg2014-10-21
| | | | This patch adds the infrastructure for the TRACE() debug macro.
* Add object list to inodesBjoern Brandenburg2014-10-21
| | | | | | | This patch adds a list of arbitrary objects to inodes. This is used by Linux's locking API to attach lock objects to inodes (which represent namespaces in Linux's locking API).
* Export x86 cache topologyFelipe Cerqueira2014-10-21
| | | | | This patch adds get_shared_cpu_map(), which allows the caller to infer which CPUs share a cache at a given level.
* Add SCHED, SCHED2, TICK, and CXS overhead tracepointsBjoern Brandenburg2014-10-21
| | | | | | | This patch integrates the overhead tracepoints into the Linux scheduler that are compatible with plain vanilla Linux (i.e., not specific to LITMUS^RT plugins). This can be used to measure the overheads of an otherwise unmodified kernel.
* Integrate ft_irq_fired() with LinuxBjoern Brandenburg2014-10-21
| | | | | This patch hooks up Feather-Trace's ft_irq_fired() handler with Linux's interrupt handling infrastructure.
* Feather-Trace: add LITMUS^RT overhead tracing infrastructureBjoern Brandenburg2014-10-21
| | | | | This patch adds the main infrastructure for tracing overheads in LITMUS^RT. It does not yet introduce any tracepoints into the kernel.
* Feather-Trace: add generic ftdev device driverBjoern Brandenburg2014-10-21
| | | | | This patch adds the ftdev device driver, which is used to export samples collected with Feather-Trace to userspace.
* Feather-Trace: add x86 binary rewriting implementationBjoern Brandenburg2014-10-21
| | | | | This patch adds the x86-specific implementation of Feather-Trace triggers that works by rewriting jump instructions.
* Feather-Trace: add platform independent implementationBjoern Brandenburg2014-10-21
| | | | | This patch adds the simple fallback implementation and creates dummy hooks in the x86 and ARM Kconfig files.
* Add LITMUS^RT directoryBjoern Brandenburg2014-10-21
| | | | Hookup litmus/ with kernel and add extra version.
* ENGR00326135 pcie: pcie ep test fail on imx6q sdRichard Zhu2014-08-06
| | | | | | | | | | | Rootcause: doesn't get the correct mem ranges from DT on imx6q after added imx6sx sdb pcie ep/rc validation system support. solution: Remove the imx6sx specification when get the mem ranges from DT. Signed-off-by: Richard Zhu <r65037@freescale.com> (cherry picked from commit b42f60a06c77448a8a00b961fb8035c58a5ed8a1)
* ENGR00324668 mmc: core: add delay for SD3.0 UHS mode switchDong Aisheng2014-08-06
| | | | | | | | | | | | | | | | | | | | | | | | | | We may meet the following errors with a SD3.0 DDR50 cards during reboot test. mmc0: new ultra high speed DDR50 SDHC card at address aaaa mmcblk0: mmc0:aaaa SU08G 7.40 GiB mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0xb00 mmcblk0: retrying using single block read mmcblk0: error -84 transferring data, sector 0, nr 8, cmd response 0x900, card status 0x0 end_request: I/O error, dev mmcblk0, sector 0 ..... Buffer I/O error on device mmcblk0, logical block 0 mmcblk0: unable to read partition table The root cause is still unknown. Since there's an errata of Sandisk eMMC card before that it requires delay for CMD6 for eMMC DDR mode to work stable, we also suspect the SD3.0 DDR requires similar delay. (Still not confirmed by Sandisk) By adding the delay, the overnight reboot test(run 2000+ times) did not show the issue anymore. Originally it can easy show the error after about 20 times of reboot test. So this patch would be the temporary workaround for Sandisk SD3.0 DDR50 mode unstable issue. Signed-off-by: Dong Aisheng <b29396@freescale.com>
* ENGR00325794 [#1087] fix video memory mutex sharing issueXianzhong2014-08-06
| | | | | | | | | | | | the root cause is video memory mutex is not global variable, it will cause video memory managment problem with mixed 2D/3D/VG. kernel panic with multiple instances stress test running glesx_viv.sh. Date: Jul 31, 2014 Signed-off-by: Xianzhong <b07117@freescale.com> Acked-by: Jason Liu (cherry picked from commit 9cec1cbd7ca2378e5c429f57d088d23d73d9c2f3)
* ENGR00325494 pcie:delay is requried after clks_enRichard Zhu2014-08-05
| | | | | | | | | | | | | - the async reset input need ref clock to sync internally, when the ref clock comes after reset, internal synced reset time is too short , cannot meet the requirement so, ssp_en should be asserted at least 4us after ref clock stable. - align to the community imx pcie driver, add the about 200us delay to make sure that it can allow the pcie clks stabilize, when pcie clks are enabled on imx6q/dl/solo. Signed-off-by: Richard Zhu <r65037@freescale.com> (cherry picked from commit 5d9635c8d92b21bc12753517fa3e9884417b19be)
* ENGR00242201 imx: Update specific clock code for MX6DLLoren Huang2014-08-05
| | | | | | | | | | -Update the parent of gpu2d_core for mx6dl. -Update the parent of gpu3d_shader and gpu3d_core for mx6dl. -Update the clock of gpu3d_shader and gpu3d_core for mx6dl. The code change is cherry-picked from patch 00e75bcba16d. Signed-off-by: Loren Huang <b02279@freescale.com> (cherry picked from commit 2b335e6232b807d114a5a57e0b5956ab794786a4)
* ENGR00325572 v4l2 capture: fix build issue for built-in modulesOliver Brown2014-08-01
| | | | | | Fix a build error for built-int modules do to missing inline declaration Signed-off-by: Oliver Brown <oliver.brown@freescale.com>
* ENGR00325203 usb: chipidea: host: check if ci->hcd initialized before access itLi Jun2014-08-01
| | | | | | | | | When ci core driver enable runtime pm in probe, it's possible runtime suspend will be started before otg fsm queue work get to run, in this case, host has not been started yet so ci->hcd is NULL, but suspend routine will access it for save ehci registers, which result in kernle panic, this patch adds pointer valid check. Signed-off-by: Li Jun <b47624@freescale.com>
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