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* ftrace: add have dynamic ftrace config for archsSteven Rostedt2008-05-231-0/+1
| | | | | | | | | | | | | | Now that ftrace is being ported to other architectures, it has become apparent that DYNAMIC_FTRACE is dependent on whether or not that architecture implements dynamic ftrace. FTRACE itself may be ported to an architecture without porting dynamic ftrace. This patch adds HAVE_DYNAMIC_FTRACE to allow architectures to port ftrace without having to also port the dynamic aspect as well. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* ftrace: support for PowerPCSteven Rostedt2008-05-2310-8/+396
| | | | | | | | | This patch adds full support for ftrace for PowerPC (both 64 and 32 bit). This includes dynamic tracing and function filtering. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* Merge branch 'merge' of ↵Linus Torvalds2008-05-2010-547/+657
|\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Update defconfigs for desktop/server systems [POWERPC] Fix mpc8377_mds.dts DMA nodes to match spec [POWERPC] Update arch/powerpc/boot/.gitignore [POWERPC] Remove generated files on make clean [POWERPC] powerpc/mm/hash_low_32.S: Remove CVS keyword [POWERPC] Update Cell MAINTAINERS entry, add spufs entry lmb: Fix compile warning
| * [POWERPC] Update defconfigs for desktop/server systemsPaul Mackerras2008-05-206-533/+637
| | | | | | | | Signed-off-by: Paul Mackerras <paulus@samba.org>
| * Merge branch 'for-2.6.26' of ↵Paul Mackerras2008-05-203-12/+20
| |\ | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into merge
| | * [POWERPC] Fix mpc8377_mds.dts DMA nodes to match specKumar Gala2008-05-201-5/+13
| | | | | | | | | | | | Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| | * [POWERPC] Update arch/powerpc/boot/.gitignoreKumar Gala2008-05-201-5/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | * Add dtbImage.* * Added zImage.holly * Folded zImage.coff.lds into zImage.*lds * Removed some unused zImage.<foo> ignores Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| | * [POWERPC] Remove generated files on make cleanKumar Gala2008-05-201-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | dtbImage.* and several zImage. targets get created but never cleaned up. Also, moved zImage to the clean-files line associated with all other image results (was previously duplicated). Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * | [POWERPC] powerpc/mm/hash_low_32.S: Remove CVS keywordAdrian Bunk2008-05-201-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | This removes a CVS keyword that wasn't updated for a long time from a comment. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2008-05-191-1/+0
|\ \ \ | |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: [PATCH] return to old errno choice in mkdir() et.al. [Patch] fs/binfmt_elf.c: fix wrong return values [PATCH] get rid of leak in compat_execve() [Patch] fs/binfmt_elf.c: fix a wrong free [PATCH] avoid multiplication overflows and signedness issues for max_fds [PATCH] dup_fd() part 4 - race fix [PATCH] dup_fd() - part 3 [PATCH] dup_fd() part 2 [PATCH] dup_fd() fixes, part 1 [PATCH] take init_files to fs/file.c
| * | [PATCH] take init_files to fs/file.cAl Viro2008-05-161-1/+0
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | [POWERPC] 4xx: Workaround for CHIP_11 ErrataJosh Boyer2008-05-191-0/+21
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PowerPC 440EP, 440GR, 440EPx, and 440GRx chips have an issue that causes the PLB3-to-PLB4 bridge to wait indefinitely for transaction requests that cross the end-of-memory-range boundary. Since the DDR controller only returns the valid portion of a read request, the bridge will prevent other PLB masters from completing their transactions. This implements the recommended workaround for this errata for chips that use older versions of firmware that do not already handle it. The last 4KiB of memory are hidden from the kernel to prevent the problem transactions from occurring. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Acked-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
* | i2c: Switch pasemi to the new device/driver matching schemeJean Delvare2008-05-181-5/+2
|/ | | | | | | The old device/driver matching scheme is going away so stop using it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Olof Johansson <olof@lixom.net>
* [POWERPC] cell: Fix section mismatches in io-workarounds codeIshizaki Kou2008-05-152-6/+6
| | | | | | | | | Fix following warnings: WARNING: arch/powerpc/platforms/cell/built-in.o(.devinit.text+0x9c): Section mismatch in reference from the function .cell_setup_phb() to the function .init.text:.iowa_register_bus() WARNING: arch/powerpc/platforms/cell/built-in.o(.devinit.text+0xa4): Section mismatch in reference from the function .cell_setup_phb() to the function .init.text:.io_workaround_init() Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] spufs: Fix compile errorFUJITA Tomonori2008-05-151-0/+1
| | | | | | | | | | | With CONFIG_VIRT_CPU_ACCOUNTING disabled, I got the following error: linux-2.6/arch/powerpc/platforms/cell/spufs/file.c: In function 'spu_switch_log_notify': linux-2.6/arch/powerpc/platforms/cell/spufs/file.c:2542: error: implicit declaration of function 'get_tb' make[4]: *** [arch/powerpc/platforms/cell/spufs/file.o] Error 1 Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] vmemmap fixes to use smaller pagesBenjamin Herrenschmidt2008-05-154-11/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This changes vmemmap to use a different region (region 0xf) of the address space, and to configure the page size of that region dynamically at boot. The problem with the current approach of always using 16M pages is that it's not well suited to machines that have small amounts of memory such as small partitions on pseries, or PS3's. In fact, on the PS3, failure to allocate the 16M page backing vmmemmap tends to prevent hotplugging the HV's "additional" memory, thus limiting the available memory even more, from my experience down to something like 80M total, which makes it really not very useable. The logic used by my match to choose the vmemmap page size is: - If 16M pages are available and there's 1G or more RAM at boot, use that size. - Else if 64K pages are available, use that - Else use 4K pages I've tested on a POWER6 (16M pages) and on an iSeries POWER3 (4K pages) and it seems to work fine. Note that I intend to change the way we organize the kernel regions & SLBs so the actual region will change from 0xf back to something else at one point, as I simplify the SLB miss handler, but that will be for a later patch. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] spufs: Fix pointer reference in find_victimLuke Browning2008-05-151-1/+1
| | | | | | | | If victim (not ctx) is in spu_run, add victim to rq. Signed-off-by: Luke Browning <lukebrowning@us.ibm.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] 85xx: SBC8548 - Add flash support and HW Rev reportingJeremy McNicoll2008-05-132-1/+123
| | | | | | | | | | | | The following adds local bus, flash and MTD partition nodes for sbc8548. As well, a compatible field for the soc node, so that of_platform_bus_probe() will pick it up. Something that is provided through this newly added epld node is the Hardware Revision which is now being utilized. Signed-off-by: Jeremy McNicoll <jeremy.mcnicoll@windriver.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 85xx: Fix some sparse warnings for 85xx MDSAndy Fleming2008-05-131-1/+1
| | | | | Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 83xx: Enable DMA engine on the MPC8377 MDS board.Zhang Wei2008-05-131-0/+27
| | | | | | | | Signed-off-by: Zhang Wei <wei.zhang@freescale.com> Cc: "Nelson, Shannon" <shannon.nelson@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 86xx: mpc8610_hpcd: fix second serial portAnton Vorontsov2008-05-131-2/+12
| | | | | | | | | | | DIU platform code should not just write to the PIXIS' BRDCFG0 register, it should set and clear its own bits only, otherwise it will break firmware setup (in fact it breaks second uart). Also get rid of magic numbers in the related code. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 86xx: mpc8610_hpcd: add support for NOR and NAND flashesAnton Vorontsov2008-05-133-4/+145
| | | | | | | | | | This patch adds device tree nodes for NOR and NAND flashes and places board-control node inside the localbus. defconfig and board file updated appropriately. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 85xx: Add 8568 PHY workarounds to board codeAndy Fleming2008-05-131-0/+119
| | | | | | | | | | The 8568 MDS needs some configuration changes to the PHY in order to work properly. These are done in the firmware, normally, but Linux shouldn't need to rely on the firmware running such things (someone could disable the PHY support in the firmware to save space, for instance). Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] 86xx: mpc8610_hpcd: use ULI526X driver for on-board ethernetAnton Vorontsov2008-05-131-5/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | As of current mainline tree, TULIP driver is unusable on MPC8610HPCD boards. There is a patch[1] floating around (and also included in the BSP), which tries to heal the situation, though the ethernet is still unusable. Practically it takes ages to mount NFS filesystem: VFS: Mounted root (nfs filesystem). Freeing unused kernel memory: 180k init nfs: server 10.0.0.2 not responding, still trying nfs: server 10.0.0.2 OK nfs: server 10.0.0.2 not responding, still trying nfs: server 10.0.0.2 not responding, still trying nfs: server 10.0.0.2 not responding, still trying nfs: server 10.0.0.2 not responding, still trying nfs: server 10.0.0.2 OK nfs: server 10.0.0.2 not responding, still trying So, instead of trying to add uli526x functionality into TULIP driver (which is already bloated enough), I fixed existing ULI526X driver and now it works perfectly well here. [1] http://www.bitshrine.org/gpp/0024-MPC8610-ETH-Lyra-native-ethernet.txt Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* [POWERPC] ppc: More compile fixesPaul Mackerras2008-05-121-1/+1
| | | | | | | | | | | | This fixes a few more miscellaneous compile problems with ARCH=ppc. 1. Don't compile devres.c on ARCH=ppc, it doesn't have ioremap_flags. 2. Include <asm/irq.h> in setup.c for the __DO_IRQ_CANON definition. 3. Include <linux/proc_fs.h> in residual.c for the definition of create_proc_read_entry. 4. Fix xchg_ptr to be a static inline to eliminate a compiler warning. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] ppc: Don't run prom_init_check for arch/ppc buildsSegher Boessenkool2008-05-121-0/+6
| | | | | | | arch/ppc doesn't have prom_init.o (anymore). Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Fix default cputable entries for e200 and e500 familiesPaul Mackerras2008-05-121-0/+2
| | | | | | | | Commit 76bc080ef5a34aedb63e1691f28c6b42f3468e4e ("POWERPC] Make default cputable entries reflect selected CPU family") added default entries for the e200 and e500 families, but missed a closing brace on those entries, as pointed out by David Gibson. This adds the closing braces. Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge branch 'merge' of ↵Linus Torvalds2008-05-0918-137/+384
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (23 commits) [POWERPC] Remove leftover printk in isa-bridge.c [POWERPC] Remove duplicate #include [POWERPC] Initialize lockdep earlier [POWERPC] Document when printk is useable [POWERPC] Fix bogus paca->_current initialization [POWERPC] Fix of_i2c include for module compilation [POWERPC] Make default cputable entries reflect selected CPU family [POWERPC] spufs: lockdep annotations for spufs_dir_close [POWERPC] spufs: don't requeue victim contex in find_victim if it's not in spu_run [POWERPC] 4xx: Fix PCI mem in sequoia DTS [POWERPC] 4xx: Add endpoint support to 4xx PCIe driver [POWERPC] 4xx: Fix problem with new TLB storage attibute fields on 440x6 core [POWERPC] spufs: spu_create should send inotify IM_CREATE event [POWERPC] spufs: handle faults while the context switch pending flag is set [POWERPC] spufs: fix concurrent delivery of class 0 & 1 exceptions [POWERPC] spufs: try to route SPU interrupts to local node [POWERPC] spufs: set SPU_CONTEXT_SWITCH_PENDING before synchronising SPU irqs [POWERPC] spufs: don't acquire state_mutex interruptible while performing callback [POWERPC] spufs: update master runcntl with context lock held [POWERPC] spufs: fix post-stopped update of MFC_CNTL register ...
| * [POWERPC] Remove leftover printk in isa-bridge.cNate Case2008-05-091-3/+0
| | | | | | | | | | | | | | | | | | This printk() appears twice in the same function. Only the latter one in the inval_range: section appears to be legitimate. Signed-off-by: Nate Case <ncase@xes-inc.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Remove duplicate #includeHuang Weiyi2008-05-091-1/+0
| | | | | | | | | | | | | | | | Remove duplicate #include of <asm/prom.h> in arch/powerpc/kernel/btext.c. Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Initialize lockdep earlierBenjamin Herrenschmidt2008-05-091-3/+3
| | | | | | | | | | | | | | | | | | This moves lockdep_init() to before udbg_early_init() as the later can call things that acquire spinlocks etc... This also makes printk safer to use earlier. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Document when printk is useableBenjamin Herrenschmidt2008-05-091-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When debugging early boot problems, it's common to sprinkle printk's all over the place. However, on 64-bit powerpc, this can lead to memory corruption if done too early due to the PACA pointer and lockdep core not being initialized. This adds some comments to early_setup() that document when it is safe to do so in order to save time for whoever has to debug that stuff next. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix bogus paca->_current initializationBenjamin Herrenschmidt2008-05-091-4/+0
| | | | | | | | | | | | | | | | | | | | | | When doing lockdep, I had two patches to initialize paca->_current early, one bogus, and one correct. Unfortunately both got merged as the bad one ended up being part of the main lockdep patch by mistake. This causes memory corruption at boot. This removes the offending code. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Make default cputable entries reflect selected CPU familyBenjamin Herrenschmidt2008-05-091-10/+43
| | | | | | | | | | | | | | | | | | | | | | | | Changes the cputable so that various CPU families that have an exclusive CONFIG_ option have a more sensible default entry to use if the specific processor hasn't been identified. This makes the kernel more generally useful when booted on an unknown PVR for things like new 4xx variants. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * Merge branch 'for-2.6.26' of ↵Paul Mackerras2008-05-0927-204/+268
| |\ | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge
| | * [POWERPC] 4xx: Fix PCI mem in sequoia DTSChristian Ehrhardt2008-05-061-2/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is fixes the sequoia.dts device tree file to use the values defined in the 440Epx data sheet from AMCC. That fixes an issue where some devices, including graphics cards, would not initialize properly because the PCI resource space was not big enough. Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| | * [POWERPC] 4xx: Add endpoint support to 4xx PCIe driverStefan Roese2008-05-061-49/+131
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds basic endpoint support to the 4xx PCIe driver. This is done by checking the device_type property of the PCIe device node ("pci" for root-complex and "pci-endpoint" for endpoint configuration). Note: Currently we map a fixed 64MByte window to PLB address 0 (SDRAM). This should probably be configurable via a dts property. Signed-off-by: Stefan Roese <sr@denx.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| | * [POWERPC] 4xx: Fix problem with new TLB storage attibute fields on 440x6 coreStefan Roese2008-05-061-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The new 440x6 core used on AMCC 460EX/GT introduces new storage attibure fields to the TLB2 word. Those are: Bit 11 12 13 14 15 WL1 IL1I IL1D IL2I IL2D With these bits the cache (L1 and L2) can be configured in a more flexible way, instruction- and data-cache independently now. The "old" I and W bits are still available and setting these old bits will automically set these new bits too (for backward compatibilty). The current code does not clear these fields resulting in disabling the cache by chance. This patch now makes sure that these new bits are cleared when the TLB2 word is written. Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * | [POWERPC] spufs: lockdep annotations for spufs_dir_closeChristoph Hellwig2008-05-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | We need to acquire the parent i_mutex with I_MUTEX_PARENT to keep lockdep happy. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: don't requeue victim contex in find_victim if it's not in ↵Christoph Hellwig2008-05-081-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | spu_run We should not requeue the victim context in find_victim if the owner is not in spu_run. It's first not needed because leaving the context on the spu is an optimization and second is harmful because it means the owner could re-enter spu_run when the context is on the runqueue and trip the BUG_ON in __spu_update_sched_info. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: spu_create should send inotify IM_CREATE eventChristoph Hellwig2008-05-061-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | Creating a spufs context or gand using spu_create should send an inotify event so that things like performance monitors have an easy way to find out about newly created contexts. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: handle faults while the context switch pending flag is setLuke Browning2008-05-052-9/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, page fault handlers don't issue a mfc restart if the context switch pending flag is set, which can leave us with a hanging DMA after a context restore. This patch introduces fault pending flag that is set by the fault handler and read by the context switch code, so that the latter can add the restart bit at the right spot, after it has successfuly saved the state of the mfc control register. Signed-off-by: Luke Browning <lukebr@linux.vnet.ibm.com> Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: fix concurrent delivery of class 0 & 1 exceptionsLuke Browning2008-05-055-28/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SPU class 0 & 1 exceptions may occur in parallel, so we may end up overwriting csa.dsisr. This change adds dedicated fields for each class to the spu and the spu context so that fault data is not overwritten. Signed-off-by: Luke Browning <lukebr@linux.vnet.ibm.com> Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: try to route SPU interrupts to local nodeLuke Browning2008-05-054-3/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, we re-route SPU interrupts to the current cpu, which may be on a remote node. In the case of time slicing, all spu interrupts will end up routed to the same cpu, where the spusched_tick occurs. This change routes mfc interrupts to the cpu where the controlling thread last ran, provided that cpu is on the same node as the spu (otherwise don't reroute interrupts). This should improve performance and provide a more predictable environment for processing spu exceptions. In the past we have seen concurrent delivery of spu exceptions to two cpus. This eliminates that concern. Signed-off-by: Luke Browning <lukebr@linux.vnet.ibm.com> Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: set SPU_CONTEXT_SWITCH_PENDING before synchronising SPU irqsLuke Browning2008-05-051-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | synchronize_irq() provides the serialization for SPU_CONTEXT_SWITCH_PENDING which is read with a simple load. This routine guarantees that the relevant interrupt handlers are not running, so that the next time they do run they will see the update memory value. This must be done correctly so that exception handling code does not restart the mfc in the middle of a context switch while we are trying to atomically stop it and save state. Signed-off-by: Luke Browning <lukebr@linux.vnet.ibm.com> Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: don't acquire state_mutex interruptible while performing ↵Jeremy Kerr2008-05-051-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | callback There's currently no way to tell if spu_process_callback has returned with the state mutex held, as -EINTR may be returned by either the syscall or the spu_acquire fail case. Instead, just do a non-interruptible mutex_lock here. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: update master runcntl with context lock heldJeremy Kerr2008-05-051-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, we update the SPU master run control bit (ie, spu_enable_spu) in spufs_run_spu before we grab the context mutex. This can result in races with other processes accessing this context's resources. This change moves the spu_enable_spu to after we have acquired the context lock. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: fix post-stopped update of MFC_CNTL registerJeremy Kerr2008-05-051-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We currently have two issues with the MFC save code: * save_mfc_decr doesn't handle a transition of 1 -> 0 of the Ds bit * The Q bit may be stale in the CSA This change fixes the first issue by clearing the relevant bits from the MFC_CNTL value in the CSA before or-ing in the updated status. Also, we add the Q bit to the updated status. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: fix save of mfc_cntl registerJeremy Kerr2008-05-051-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, we can introduce invalid entries into the MFC queues: 1) context starts a DMA 2) context gets scheduled out during a DMA - kernel saves MFC queue to CSA - kernel saves 0x0 in csa->mfc_control_RW 3) context gets scheduled in - csa->mfc_control[Q] ('queues empty') isn't set, so DMA queues are restored from the CSA 4) context's DMA is completed 5) context gets scheduled out again, no DMA occuring this time - kernel sees that MFC_CNTL[Q] ('queues empty') is set, so doesn't touch saved queue data in CSA - kernel saves 0x0 in csa->mfc_control_RW 6) context gets scheduled in - csa->mfc_control[Q] ('queues empty') isn't set (we saved is as 0!), so DMA queues are restored from the CSA In this last restore, we've restored the queue status from step 2, which are now invalid. This change makes save_mfc_cntl() closer to the save/restore sequence, as specified in the CBE handbook. With changes from Luke Browning. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
| * | [POWERPC] spufs: don't touch suspend bits when purging DMA queueJeremy Kerr2008-05-051-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we issue a MFC purge request, we may inadvertantly clear the suspended status. This change adds the MFC_CNTL_SUSPEND_MASK when we issue a purge request, so that the suspend bit is masked out. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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