- Dec 21, 2007
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Christoph Hellwig authored
Make most places that use spu_acquire/spu_acquire_saved interruptible, this allows getting out of the spufs code when e.g. pressing ctrl+c. There are a few places where we get called e.g. from spufs teardown routines were we can't simply err out so these are left with a comment. For now I've also not touched the poll routines because it's open what libspe would expect in terms of interrupted system calls. Acked-by:
Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Jeremy Kerr <jk@ozlabs.org> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Christoph Hellwig authored
The simple attr macros currently used by spufs can't deal with the handlers returning errors, which is required to make the state_mutex interruptible. This adds a local copy that allows for an error return from the get/set handlers. Signed-off-by:
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Luke Browning authored
Change spufs_spu_run so that the context is queued directly to the scheduler and the controlling thread advances directly to spufs_wait() for spe errors and exceptions. nosched contexts are treated the same as before. Fixes from Christoph Hellwig <hch@lst.de> Signed-off-by:
Luke Browning <lukebr@linux.vnet.ibm.com> Signed-off-by:
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Masato Noguchi authored
This changes the spu context switch code to not write to reserved bits of spu interrupt status register. The architecture book says the reserved fields should be set to zero. Signed-off-by:
Masato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by:
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Luke Browning authored
Need to re-check priority after dropping lock. Otherwise, a more favored context may be preempted. Signed-off-by:
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Luke Browning authored
This cleans up spu_run_init so that it does all of the spu initialization for spufs_run_spu. It initializes the spu context as much as possible before it activates the spu and writes the runcntl register. Signed-off-by:
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Jeremy Kerr authored
Based on original patches from Arnd Bergmann <arnd.bergman@de.ibm.com>; and Luke Browning <lukebr@linux.vnet.ibm.com> Currently, spu contexts need to be loaded to the SPU in order to take class 0 and class 1 exceptions. This change makes the actual interrupt-handlers much simpler (ie, set the exception information in the context save area), and defers the handling code to the spufs_handle_class[01] functions, called from spufs_run_spu. This should improve the concurrency of the spu scheduling leading to greater SPU utilization when SPUs are overcommited. Signed-off-by:
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Jeremy Kerr authored
Add a few #defines for the class 0, 1 and 2 interrupt status bits, and use them instead of magic numbers when we're setting or checking for these interrupts. Also, add a #define for the class 2 mailbox threshold interrupt mask. Signed-off-by:
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Jeremy Kerr authored
When doing a poll on the mbox stat file of a swapped-out context, we clear the class 0 interrupt status, rather than the class 2 interrupt status. This change corrects the poll operation to clear the correct interrupt. Signed-off-by:
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Luke Browning authored
This change encapsulates the spu_privcntl_RW register so that it can be written through backing ops. This is necessary so that spu contexts can be initialized and queued to the scheduler in spufs_run_spu. Signed-off-by:
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Arnd Bergmann authored
This change disables the logic that faults-in spu contexts under the covers from the page fault handler. When a fault requires a runnable context, the handler will block until the context is scheduled by other means. Signed-off-by:
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Jeremy Kerr authored
Currently, part of the spufs code (switch.o, lscsa_alloc.o and fault.o) is compiled directly into the kernel. This change moves these components of spufs into the kernel. The lscsa and switch objects are fairly straightforward to move in. For the fault.o module, we split the fault-handling code into two parts: a/p/p/c/spu_fault.c and a/p/p/c/spufs/fault.c. The former is for the in-kernel spu_handle_mm_fault function, and we move the rest of the fault-handling code into spufs. Signed-off-by:
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Julio M. Merino Vidal authored
Fix a few typos in the spufs scheduler comments Signed-off-by:
Julio M. Merino Vidal <jmerino@ac.upc.edu> Signed-off-by:
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Masato Noguchi authored
Add platform specific SPU run control routines to the spufs. The current spufs implementation uses the SPU master run control bit (MFC_SR1[S]) to control SPE execution, but the PS3 hypervisor does not support the use of this feature. This change adds the run control wrapper routies spu_enable_spu() and spu_disable_spu(). The bare metal routines use the master run control bit, and the PS3 specific routines use the priv2 run control register. An outstanding enhancement for the PS3 would be to add a guard to check for incorrect access to the spu problem state when the spu context is disabled. This check could be implemented with a flag added to the spu context that would inhibit mapping problem state pages, and a routine to unmap spu problem state pages. When the spu is enabled with ps3_enable_spu() the flag would be set allowing pages to be mapped, and when the spu is disabled with ps3_disable_spu() the flag would be cleared and mapped problem state pages would be unmapped. Signed-off-by:
Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by:
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- Dec 20, 2007
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Julia Lawall authored
There should be an of_node_put when breaking out of a loop that iterates using for_each_node_by_type. This was detected and fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/ ) // <smpl> @@ identifier d; type T; expression e; iterator for_each_node_by_type; @@ T *d; ... for_each_node_by_type(d,...) {... when != of_node_put(d) when != e = d ( return d; | + of_node_put(d); ? return ...; ) ...} // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Cc: Christian Krafft <krafft@de.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Erb <djerb@us.ibm.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Julia Lawall authored
There should be an of_node_put when breaking out of a loop that iterates over calls to of_find_all_nodes, as this function does an of_node_get on the value it returns. This was fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/ ) // <smpl> @@ type T; identifier d; expression e; @@ T *d; ... for (d = NULL; (d = of_find_all_nodes(d)) != NULL; ) {... when != of_node_put(d) when != e = d ( return d; | + of_node_put(d); ? return ...; ) ...} // </smpl> Signed-off-by:
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Lucas Woods authored
Signed-off-by:
Lucas Woods <woodzy@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Cyrill Gorcunov authored
This fixes a possible NULL pointer dereference inside of strncmp() if of_get_property() fails. Signed-off-by:
Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by:
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Benjamin Herrenschmidt authored
The device node for the HT bridge on G5s doesn't contain useful ranges. We used to give it a bunch of the known PCI space and then punch a "hole" in it based on where the AGP or PCIe region was. This reworks it to use the actual register in the bridge that controls the decoding instead. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Benjamin Herrenschmidt authored
This enables the PCI code to see the device that represents the HT host bridge on the PowerMac G5. Signed-off-by:
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Benjamin Herrenschmidt authored
It should now be safe to re-assign unassigned resources on 64 bits PowerMac machines (G5s). This clears pci_probe_only on those. Signed-off-by:
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Benjamin Herrenschmidt authored
Powermac's use of the pcibios_enable_device_hook() got slightly broken by the recent PCI merge in that it won't be called for the "initial" case of assigning resources to a previously unassigned device. This was an abuse of that hook anyway, so instead we now use a header quirk. While at it, we move a #ifdef CONFIG_PPC32 to enclose more code that is only ever used on 32 bits. Signed-off-by:
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Benjamin Herrenschmidt authored
This merge the two implementations, based on the previously fixed up 32 bits one. The pcibios_enable_device_hook in ppc_md is now available for ppc64 use. Also remove the new unused "initial" parameter from it and fixup users. Signed-off-by:
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Benjamin Herrenschmidt authored
The way iSeries manages PCI IO and Memory resources is a bit strange and is based on overriding the content of those resources with home cooked ones afterward. This changes it a bit to better integrate with the new resource handling so that the "virtual" tokens that iSeries replaces resources with are done from the proper per-device fixup hook, and bridge resources are set to enclose that token space. This fixes various things such as the output of /proc/iomem & ioports, among others. This also fixes up various boot messages as well. Signed-off-by:
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Benjamin Herrenschmidt authored
The 32 bits PCI code now uses the generic code for assigning unassigned resources and an algorithm similar to x86 for claiming existing ones. This works far better than the 64 bits code which basically can only claim existing ones (pci_probe_only=1) or would fall apart completely. This merges them so that the new 32 bits implementation is used for both. 64 bits now gets the new PCI flags for controlling the behaviour, though the old pci_probe_only global is still there for now to be cleared if you want to. I kept a pcibios_claim_one_bus() function mostly based on the old 64 bits code for use by the DLPAR hotplug. This will have to be cleaned up, thought I hope it will work in the meantime. Signed-off-by:
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Benjamin Herrenschmidt authored
The PCI code in 32 and 64 bits fixes up resources differently. 32 bits uses a header quirk plus handles bridges in pcibios_fixup_bus() while 64 bits does things in various places depending on whether you are using OF probing, using PCI hotplug, etc... This merges those by basically using the 32 bits approach for both, with various tweaks to make 64 bits work with the new approach. Signed-off-by:
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Benjamin Herrenschmidt authored
This adds to the 32 bits PCI code some flags, replacing the old pci_assign_all_busses global, that allow us to control various aspects of the PCI probing, such as whether to re-assign all resources or not, or to not try to assign anything at all. This also adds the flag x86 already has to avoid ISA alignment on bridges that don't have ISA forwarding enabled (no legacy devices on the top level bus) and sets it for PowerMacs. Signed-off-by:
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Olof Johansson authored
There's nothing in holly.c that needs linux/ide.h, just remove it from the list of includes. Signed-off-by:
Olof Johansson <olof@lixom.net> Acked-by:
Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by:
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Milton Miller authored
The per-processor interrupt request register and current processor priority register are only accessed on the current cpu. In fact the hypervisor doesn't even let us choose which cpu's registers to access. The only function to use cpu twice is xics_migrate_irqs_away, not a fast path. But we can cache the result of get_hard_processor_id() instead of calling get_hard_smp_processor_id(cpu) in a loop across the call to rtas. Years ago the irq code passed smp_processor_id into get_irq, I thought we might initialize the CPPR third party at boot as an extra measure of saftey, and it made the code symmetric with the qirr (queued interrupt for software generated interrupts), but now it is just extra and sometimes unneeded work to pass it down. Signed-off-by:
Milton Miller <miltonm@bga.com> Signed-off-by:
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Ishizaki Kou authored
This splits the machine definition for celleb into two definitions, one for celleb_beat, and the other for celleb_native. Though this looks complex because of sorting some functions, there are no more semantic changes than that for the splitting. Signed-off-by:
Kou Ishizaki <Kou.Ishizaki@toshiba.co.jp> Acked-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Ishizaki Kou authored
This makes mmio_nvram_init() callable unconditionally by providing a dummy definition when CONFIG_MMIO_NVRAM is not defined. Signed-off-by:
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Olof Johansson authored
Implement MSI support for PA Semi PWRficient platforms. MSI is done through a special range of sources on the openpic controller, and they're unfortunately breaking the usual concepts of how sources are programmed: * The source is calculated as 512 + the value written into the MSI register * The vector for this source is added to the source and reported through IACK This means that for simplicity, it makes much more sense to just set the vector to 0 for the source, since that's really the vector we expect to see from IACK. Also, the affinity/priority registers will affect 16 sources at a time. To avoid most (simple) users from being limited by this, allocate 16 sources per device but use only one. This means that there's a total of 32 sources. If we get usage scenarions that need more sources, the allocator should probably be revised to take an alignment argument and size, not just do natural alignment. Finally, since I'm already touching the MPIC names on pasemi, rename the base one from the somewhat odd " PAS-OPIC " to "PASEMI-OPIC". Signed-off-by:
Michael Ellerman <michael@ellerman.id.au> Signed-off-by:
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Stephen Rothwell authored
Commit fbd568a3 ("Change synchronize_kernel to _rcu and _sched") changed the deprecated synchronize_kernel() in HvLpEvent_unregisterHandler() to synchronize_rcu(). It turns out that it should have been synchronize_sched(). Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Acked-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by:
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- Dec 19, 2007
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Jeremy Kerr authored
We're currently getting a warning from not checking the result of sysfs_create_group, which is declared as __must_check. This change introduces appropriate error-handling for spu_add_sysdev_attr_group() Signed-off-by:
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Jeremy Kerr authored
Currently, we have a possibilty that the SLBs setup during context switch don't cover the entirety of the necessary lscsa and code regions, if these regions cross a segment boundary. This change checks the start and end of each region, and inserts a SLB entry for each, if unique. We also remove the assumption that the spu_save_code and spu_restore_code reside in the same segment, by using the specific code array for save and restore. Signed-off-by:
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Jeremy Kerr authored
Add a function spu_64k_pages_available(), so that we can abstract the explicity use of mmu_psize_defs() in lssca_alloc.c Signed-off-by:
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Jeremy Kerr authored
Now that we have a helper function to setup a SPU SLB, use it for __spu_trap_data_seq. Signed-off-by:
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Jeremy Kerr authored
Currently, the SPU context switch code (spufs/switch.c) sets up the SPU's SLBs directly, which requires some low-level mm stuff. This change moves the kernel SLB setup to spu_base.c, by exposing a function spu_setup_kernel_slbs() to do this setup. This allows us to remove the low-level mm code from switch.c, making it possible to later move switch.c to the spufs module. Also, add a struct spu_slb for the cases where we need to deal with SLB entries. Signed-off-by:
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Andre Detsch authored
This patch changes the way we check for the existence of vicinity property in spe device nodes. The new implementation does not depend on having an initialized cbe_spu_info[0].spus, and checks for presence of vicinity in all nodes, not only in the first one. Signed-off-by:
Andre Detsch <adetsch@br.ibm.com> Signed-off-by:
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Jeremy Kerr authored
Export force_sig_info to allow signals to be sent from a modular spufs. Signed-off-by:
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