- 14 Feb, 2007 4 commits
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Michael Ellerman authored
Move all the pseries kexec code into one file, platforms/pseries/kexec.c Provide helpers for setting up ppc_md.kexec_cpu_down, so that we don't have to have #ifdef CONFIG_KEXEC in setup.c Move the initialisation of the ppc_md kexec callbacks into an init routine. This is well and truly early enough to cause no change in behaviour, we can't kexec until userspace has given us a kernel to kexec into. Signed-off-by:
Michael Ellerman <michael@ellerman.id.au> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Michael Ellerman authored
Move some extern declarations from setup.c into the new pseries.h. While we're at it, provide dummy implementations for !SMP, to avoid cluttering the C file with more #ifdefs. Signed-off-by:
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Michael Ellerman authored
Following the example of platforms/pasemi, consolidate a couple of tiny header files in platforms/pseries into pseries.h. This gives us a convenient place to put things that need to be available to the platform code, but not public. And hopefully will help people resist the temptation of sticking externs in C files. Signed-off-by:
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- 13 Feb, 2007 36 commits
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Kumar Gala authored
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Becky Bruce authored
Eliminate needless invocation of the SYNC macro (which always evaluates to nothing on BookE) from head_fsl_booke.S (for both arch/ppc & arch/powerpc). Signed-off-by:
Becky Bruce <becky.bruce@freescale.com> Signed-off-by:
Kumar Gala <galak@kernel.crashing.org>
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Maynard Johnson authored
The code was setting up the debug bus for group 21 when profiling on the event PPU CYCLES. The debug bus is not actually used by the hardware performance counters when counting PPU CYCLES. Setting up the debug bus for PPU CYCLES causes signal routing conflicts on the debug bus when profiling PPU cycles and another PPU event. This patch fixes the code to only setup the debug bus to route the performance signals for the non PPU CYCLE events. Signed-off-by:
Maynard Johnson <mpjohn@us.ibm.com> Signed-off-by:
Carl Love <carll@us.ibm.com> Signed-off-by:
Arnd Bergmann <arnd.bergmann@de.ibm.com>
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Carl Love authored
This is a clean up patch that includes the following changes: -Some comments were added to clarify the code based on feedback from the community. -The write_pm_cntrl() and set_count_mode() were passed a structure element from a global variable. The argument was removed so the functions now just operate on the global directly. -The set_pm_event() function call in the cell_virtual_cntr() routine was moved to a for-loop before the for_each_cpu loop Signed-off-by:
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Masato Noguchi authored
I found an exploit in current kernel. Currently, there is no range check about mmapping "/mem" node in spufs. Thus, an application can access privilege memory region. In case this kernel already worked on a public server, I send this information only here. If there are such servers in somewhere, please replace it, ASAP. Signed-off-by:
Masato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by:
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Christoph Hellwig authored
For SCHED_RR tasks we can do some really trivial timeslicing. Basically we fire up a time for every scheduler tick that searches for a higher or same priority thread that is on the runqueue and if there is one context switches to it. Because we can't lock spus from timer context we actually run this from a delayed runqueue instead of a timer. A nice optimization would be to skip the actual priority bitmap search when there are less contexts than physical spus available. To implement this I need a so far unpublished patch from Andre, and it will be added after we have that patch in. Note that right now we only do the time slicing for SCHED_RR tasks. The code would work for SCHED_OTHER tasks aswell, but their prio value is defered from the one the PPU thread has at time of spu_run, and using this for spu scheduling decisions would make the code very unfair. SCHED_OTHER support will be enabled once we the spu scheduler knows how to calculcate cpu_context.prio (very soon) Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Christoph Hellwig authored
use DECLARE_BITMAP in the spu scheduler instead of reimplementing it. Signed-off-by:
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Christoph Hellwig authored
If we start a spu context with realtime priority we want it to run immediately and not wait until some other lower priority thread has finished. Try to find a suitable victim and use it's spu in this case. Signed-off-by:
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Christoph Hellwig authored
Give spu_yield a kerneldoc comment and remove the old comment documenting spu_activate, spu_deactive and spu_yield as all of them now have descriptive kerneldoc comments of their own. Signed-off-by:
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Christoph Hellwig authored
If we call spu_remove_from_active_list that spu is always guaranteed to be on the active list and in runnable state, so we can simply do a list_del to remove it and unconditionally take the was_active codepath. Signed-off-by:
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Christoph Hellwig authored
There is no need to directly wake up contexts in spu_activate when called from spu_run, so add a flag to surpress this wakeup. Signed-off-by:
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Christoph Hellwig authored
This is the biggest patch in this series, and it reworks the guts of the spu scheduler runqueue mechanism: - instead of embedding a waitqueue in the runqueue there is now a simple doubly-linked list, the actual wakeups happen by reusing the stop_wq in the spu context (maybe we should rename it one day) - spu_free and spu_prio_wakeup are merged into a single spu_reschedule function - various functionality is split out into small helpers, and kerneldoc comments are added in various places to document what's going on. - spu_activate is rewritten into a tight loop by removing test for various impossible conditions and using the infrastructure in this patch. Signed-off-by:
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Christoph Hellwig authored
It doesn't make any sense to have a priority field in the physical spu structure. Move it into the spu context instead. Signed-off-by:
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Christoph Hellwig authored
Various cleanups in code surrounding the state semaphore: - inline spu_acquire/spu_release - cleanup spu_acquire_* and add kerneldoc comments to these functions - remove spu_release_exclusive and replace it with spu_release Signed-off-by:
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Christoph Hellwig authored
The r/w semaphore to lock the spus was overkill and can be replaced with a mutex to make it faster, simpler and easier to debug. It also helps to allow making most spufs interruptible in future patches. Signed-off-by:
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Christoph Hellwig authored
Various cleanups to sched.c that don't change the global control flow: - add kerneldoc comments to various functions - add spu_ prefixes to various functions - add/remove context from the runqueue in bind/unbind_context as it's part of the logical operation - add a call to put_active_spu to spu_unbind_contex as it's logically part of the unbind operation Signed-off-by:
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Christoph Hellwig authored
Only bind_context/unbind_context change the spu context state. Thus we can move all assignents of SPU_STATE_RUNNABLE into bind_context, which parallels the unbind side aswell. Signed-off-by:
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Christoph Hellwig authored
unbind_context already sets the context state to SPU_STATE_SAVED, thus the spu_deactivate callers don't need to do it again. Signed-off-by:
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Christoph Hellwig authored
Remove the empty last line in arch/powerpc/platforms/cell/spufs/run.c. Signed-off-by:
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Christoph Hellwig authored
Remove the SPU_CONTEXT_PREEMPT define. It's unused and won't be used in this form after the scheduler rework. Signed-off-by:
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Kumar Gala authored
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Timur Tabi authored
This patch updates the defconfig for the MPC8349E-mITX. In addition to picking up changes from recent kernels, disables support for e100 (which doesn't ship with the system), turns off input devices, turns on some I2C support, turns off HW monitoring (HW not yet supported), turns off OHCI USB (not used), turns off USB gadget support (HW not yet supported), turns on DOS FS support, and turns off kernel debugging. Signed-off-by:
Timur Tabi <timur@freescale.com> Signed-off-by:
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Timur Tabi authored
This patch adds a defconfig and a DTS for the MPC8349E-mITX-GP, a variant of the MPC8349E-mITX. USB is disabled because the only USB port is not setup properly by firmware/kernel Signed-off-by:
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Kumar Gala authored
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Andy Fleming authored
Add defconfig for the MPC8568 MDS reference board Signed-off-by:
Andrew Fleming <afleming@freescale.com> Signed-off-by:
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Andy Fleming authored
Add support for the MPC8568 MDS reference board Signed-off-by:
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Kumar Gala authored
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Kumar Gala authored
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Kumar Gala authored
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Benjamin Herrenschmidt authored
It looks like we've had some serious bitrot there mostly due to tracking of address_space's of mmap'ed files getting out of sync with the actual mmap code. The mfc, mss and psmap were not tracked properly and thus not invalidated on context switches (oops !) I also removed the various file->f_mapping = inode->i_mapping; assignments that were done in the other open() routines since that is already done for us by __dentry_open. One improvement we might want to do later is to assign the various ctx-> fields at mmap time instead of file open/close time so that we don't call unmap_mapping_range() on thing that have not been mmap'ed Finally, I added some smp_wmb's after assigning the ctx-> fields to make sure they are visible to other CPUs. I don't think this is really necessary as I suspect locking in the fs layer will make that happen anyway but better safe than sorry. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Benjamin Herrenschmidt authored
Struct page are no longer needed for SPUs, so let's not create them on PS3 anymore. Signed-off-by:
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Benjamin Herrenschmidt authored
This patch removes the need for struct page for SPE local store and registers from spufs. It also makes the locking much more obvious and no longer relying on the truncate logic black magic for protecting against races between unmap_mapping_range() and new pages faulted in. It does so by switching to a nopfn() handler and using the new vm_insert_pfn() to setup the PTEs itself while holding a lock on the SPE. The nice thing is that this patch actually removes a lot more code than it adds :-) Signed-off-by:
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Sylvain Munaut authored
The efika platform used three files efika-pci.c efika-setup.c and a 2 line efika.h to link the two. The total of code in those is really not much and therefore, I think they're better merged in a single file. There is absolutely _no_code_change_ at all, just merged the files. Signed-off-by:
Sylvain Munaut <tnt@246tNt.com> Acked-by:
Grant Likely <grant.likely@secretlab.ca> Signed-off-by:
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Sylvain Munaut authored
Signed-off-by:
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Sylvain Munaut authored
Now that the device tree has the good properties, we can remove all the efika_init code by a single call to common code. While we're modifying that file, a few whitespaces/alignement/typo fixes are made (nothing significant). Signed-off-by:
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Sylvain Munaut authored
The 52xx was put before CHRP to allow EFIKA to be recognized properly. Now the efika tree is fixed up in prom_init so no need for this ugly hack. So we restore the 'normal' order. Signed-off-by:
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