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* powerpc: Move most remaining ppc64 files over to arch/powerpcPaul Mackerras2005-11-1425-13789/+1
| | | | | | | Also deletes files in arch/ppc64 that are no longer used now that we don't compile with ARCH=ppc64 any more. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: kill ppc64 rtc.c, use genrtc insteadBenjamin Herrenschmidt2005-11-142-359/+0
| | | | | | | | | | | This moves the rtas RTC callbacks to rtas-rtc.c in arch/powerpc/kernel, and kills the rest of arch/ppc64/kernel/rtc.c which was just a duplicate of the genrtc functionality. Also enable build of genrtc for CONFIG_PPC64 (it just works are we already have the required callbacks) and enable it in all defconfigs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Export htab start/end via device treeMichael Ellerman2005-11-141-0/+51
| | | | | | | | | | | The userspace kexec-tools need to know the location of the htab on non-lpar machines, as well as the end of the kernel. Export via the device tree. NB. This patch has been updated to use "linux,x" property names. You may need to update your kexec-tools to match. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Turn cpu_irq_down into kexec_cpu_downMichael Ellerman2005-11-141-6/+6
| | | | | | | | | | | | | | | | | | | We currently have a ppc_md member called cpu_irq_down, which disables IRQs for the cpu in question. The only caller of cpu_irq_down is the kexec code. On pSeries we need to do more than just teardown IRQs at kexec time, so rename the ppc_md member to kexec_cpu_down and expand it. The pSeries code needs to know, and other platforms might too, whether we're doing a crash shutdown (ie. panicking) or a regular kexec, so add a flag for that. The pSeries implementation of kexec_cpu_down does an unregister VPA call, which tells the Hypervisor to stop writing stuff into our pacas. Without this we can get weird memory corruption bugs when we kexec, caused by the Hypervisor writing into the first kernel's pacas which happens to be somewhere interesting in the second kernel's memory. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] tpm: necessary PPC64 function exportsKylene Jo Hall2005-11-131-0/+2
| | | | | | | | | | Some work is needed in the tpm device driver to discover the TPM out of the device tree rather than based on set address on Power PPC. This patch exports a couple of functions for the parsing. Signed-off-by: Kylene Hall <kjhall@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernelBenjamin Herrenschmidt2005-11-1117-1447/+1
| | | | | | | | | | | | | | | | | | | | | This patch moves the vdso's to arch/powerpc, adds support for the 32 bits vdso to the 32 bits kernel, rename systemcfg (finally !), and adds some new (still untested) routines to both vdso's: clock_gettime() with support for CLOCK_REALTIME and CLOCK_MONOTONIC, clock_getres() (same clocks) and get_tbfreq() for glibc to retreive the timebase frequency. Tom,Steve: The implementation of get_tbfreq() I've done for 32 bits returns a long long (r3, r4) not a long. This is such that if we ever add support for >4Ghz timebases on ppc32, the userland interface won't have to change. I have tested gettimeofday() using some glibc patches in both ppc32 and ppc64 kernels using 32 bits userland (I haven't had a chance to test a 64 bits userland yet, but the implementation didn't change and was tested earlier). I haven't tested yet the new functions. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Move udbg code to arch/powerpcDavid Gibson2005-11-114-390/+0
| | | | | | | | | | | | | | | | | Since the udbg code in ppc64 has no ppc32 equivalent, move it straight over into arch/powerpc (and include/asm-powerpc for udbg.h). In time, we probably want to meld the various bits and pieces of 32-bit early debugging code into udbg, but for now only include it on CONFIG_PPC64=y builds. The only change during the move is to standardise the protecting #ifdef/#define in udbg.h, and move its banner comment above the initial #ifdef (which seems to be normal practice). Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64). Built for 32bit multiplatform (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc64: Convert NUMA to sparsemem (3)Anton Blanchard2005-11-111-8/+3
| | | | | | | | | | | | | | | | Convert to sparsemem and remove all the discontigmem code in the process. This has a few advantages: - The old numa_memory_lookup_table can go away - All the arch specific discontigmem magic can go away We also remove the triple pass of memory properties and instead create a list of per node extents that we iterate through. A final cleanup would be to change our lmb code to store extents per node, then we can reuse that information in the numa code. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc64: Cleanup kprobe assemblyAnton Blanchard2005-11-111-1/+2
| | | | | | | | The kprobes code is doing ".previous .text". While the assembler doesnt warn at the moment (and it seems to work), it might in the future. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: fix iSeries buildStephen Rothwell2005-11-101-0/+2
| | | | | | Only MULTIPLATFORM has phbs_remap_io. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
* [PATCH] powerpc: Move more ppc64 files with no ppc32 equivalent to powerpcDavid Gibson2005-11-105-1641/+1
| | | | | | | | | | | | | | | | | | | | | | | This patch moves a bunch more files from arch/ppc64 and include/asm-ppc64 which have no equivalents in ppc32 code into arch/powerpc and include/asm-powerpc. The file affected are: hvcall.h proc_ppc64.c sysfs.c lparcfg.c rtas_pci.c The only changes apart from the move and corresponding Makefile changes are: - #ifndef/#define in includes updated to _ASM_POWERPC_ form - trailing whitespace removed - comments giving full paths removed Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64), built for 32-bit powermac (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc64: fix PCI IO mappingBenjamin Herrenschmidt2005-11-101-0/+3
| | | | | | | | | | | | | | | | | phbs_remap_io(), which maps the PCI IO space into the kernel virtual space, is called too early on powermac, and thus doesn't work. This fixes it by removing the call from all platforms and putting it back into the ppc64 common code where it belongs, after the actual probing of the bus. That means that before that call, only the ISA IO space (if any) is mapped, any PIO access (from quirks for example) will fail. This happens not to be a problem for now, but we'll have to rework that code if it becomes one in the future. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: merge code values for identifying platformsPaul Mackerras2005-11-1010-102/+18
| | | | | | | | | | | | This patch merges platform codes. systemcfg->platform is no longer used, systemcfg use in general is deprecated as much as possible (and renamed _systemcfg before it gets completely moved elsewhere in a future patch), _machine is now used on ppc64 along as ppc32. Platform codes aren't gone yet but we are getting a step closer. A bunch of asm code in head[_64].S is also turned into C code. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Move scanlog.c to platforms/pseriesDavid Gibson2005-11-102-236/+0
| | | | | | | | | | | scanlog.c is only compiled on pSeries. Thus, this patch moves it to platforms/pseries. Built and booted on pSeries LPAR (ARCH=powerpc and ARCH=ppc64). Built for iSeries (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge git://oak/home/sfr/kernels/iseries/workPaul Mackerras2005-11-103-524/+5
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| * powerpc: merge irq.cStephen Rothwell2005-11-092-416/+1
| | | | | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
| * ppc64: remove ppc_irq_dispatch_handlerStephen Rothwell2005-11-092-108/+4
| | | | | | | | | | | | | | Use __do_IRQ instead. The only difference is that every controller is now assumed to have an end() routine (only xics_8259 did not). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
| * ppc64: move stack switching up in interrupt processingStephen Rothwell2005-11-092-24/+24
| | | | | | | | | | | | | | This will make the ppc64 multiplatform irq handling more like the generic handling. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
* | [PATCH] ppc64: move eeh.c to powerpc directory from ppc64Linas Vepstas2005-11-102-1094/+0
| | | | | | | | | | | | | | | | | | | | 11-eeh-move-to-powerpc.patch Move arch/ppc64/kernel/eeh.c to arch//powerpc/platforms/pseries/eeh.c No other changes (except for Makefile to build it) Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: bugfix: don't silently ignore PCI errorsLinas Vepstas2005-11-101-2/+3
| | | | | | | | | | | | | | | | | | | | | | 10-EEH-enable-bugfix.patch Bugfix: With the curent linux-2.6.14-rc2-git6, EEH errors are ignored because thier detection requires an unused, uninitialized flag to be set. This patch removes the unused flag. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: bugfix: crash on PCI hotplugLinas Vepstas2005-11-101-4/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 09-hotplug-bugfix.patch In the current 2.6.14-rc2-git6 kernel, performing a Dynamic LPAR Add of a hotplug slot will crash the system, with the following (abbreviated) stack trace: cpu 0x3: Vector: 700 (Program Check) at [c000000053dff7f0] pc: c0000000004f5974: .__alloc_bootmem+0x0/0xb0 lr: c0000000000258a0: .update_dn_pci_info+0x108/0x118 c0000000000257c8 .update_dn_pci_info+0x30/0x118 (unreliable) c0000000000258fc .pci_dn_reconfig_notifier+0x4c/0x64 c000000000060754 .notifier_call_chain+0x68/0x9c The root cause was that __init __alloc_bootmem() was called long after boot had finished, resulting in a crash because this routine is undefined after boot time. The patch below fixes this crash, and adds some docs to clarify the code. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: escape hatch for spinning interrupt deadlocksLinas Vepstas2005-11-101-8/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | 08-eeh-spin-counter.patch One an EEH event is triggers, all further I/O to a device is blocked (until reset). Bad device drivers may end up spinning in their interrupt handlers, trying to read an interrupt status register that will never change state. This patch moves that spin counter to a per-device structure, and adds some diagnostic prints to help locate the bad driver. Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: serialize reports of PCI errorsLinas Vepstas2005-11-101-13/+85
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 07-eeh-report-race.patch When a PCI slot is isolated, all PCI functions under that slot are affected. If hese functions have separate device drivers, the EEH isolation event might be reported multiple times. This patch adds a lock to prevent the racing of such multiple reports. It also marks every device under the slot as having experienced an EEH event, so that multiple reports may be recognized more easily. Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: avoid PCI error reporting for empty slotsLinas Vepstas2005-11-101-2/+27
| | | | | | | | | | | | | | | | | | | | 06-eeh-empty-slot-error.patch Performing PCI config-space reads to empty PCI slots can lead to reports of "permanent failure" from the firmware. Ignore permanent failures on empty slots. Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: RTAS error reporting restructuringLinas Vepstas2005-11-101-16/+30
| | | | | | | | | | | | | | | | | | | | 05-eeh-slot-error-detail.patch This patch encapsulates a section of code that reports the EEH event. The new subroutine can be used in several places to report the error. Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: PCI error rate statisticsLinas Vepstas2005-11-101-11/+32
| | | | | | | | | | | | | | | | | | | | | | | | 04-eeh-statistics.patch This minor patch adds some statistics-gathering counters that allow the behaviour of the EEH subsystem o be monitored. While far from perfect, it does provide a rudimentary device that makes understanding of the current state of the system a bit easier. Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: PCI address cache minor fixesLinas Vepstas2005-11-101-7/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 03-eeh-addr-cache-cleanup.patch This is a minor patch to clean up a buglet related to the PCI address cache. (The buglet doesn't manifes itself unless there are also bugs elsewhere, which is why its minor.). Also: -- Improved debug printing. -- Declare some private routines as static -- Adds reference counting to struct pci_dn->pcidev structure Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: misc minor cleanupLinas Vepstas2005-11-101-28/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 02-eeh-minor-cleanup.patch This patch performs some minor cleanup of the eeh.c file, including: -- trim some trailing whitespace -- remove extraneous #includes -- use the macro PCI_DN uniformly, instead of the void pointer chase. -- typos in comments -- improved debug printk's Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: uniform usage of bus unit id interfaceslinas2005-11-102-27/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | 01-pci-dn-uniformization.patch This patch changes the rtas_pci interface to use the new struct pci_dn structure for two routines that work with pci device nodes. This patch also does some minor janitorial work: it uses some handy macros and cleans up some trailing whitespace in the affected file. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64 boot: fix compile warningsOlaf Hering2005-11-101-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | Fix a few compile warnings arch/ppc64/boot/addRamDisk.c:166: warning: int format, long unsigned int arg (arg 2) arch/ppc64/boot/addRamDisk.c:170: warning: int format, long unsigned int arg (arg 2) arch/ppc64/boot/addRamDisk.c:265: warning: unsigned int format, long unsigned int arg (arg 2) arch/ppc64/boot/addRamDisk.c:302: warning: unsigned int format, long unsigned int arg (arg 3) Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64 boot: remove sysmap from required filenamesOlaf Hering2005-11-101-62/+69
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A stripped vmlinux does not contain enough symbols to recreate the System.map. The System.map file is only used to determine the end of the runtime memory size. This is the same value (rounded up to PAGE_SIZE) as ->memsiz in the ELF program header. Also, the target vmlinux.initrd doesnt work in 2.6.14: arch/ppc64/boot/addRamDisk arch/ppc64/boot/ramdisk.image.gz vmlinux.strip arch/ppc64/boot/vmlinux.initrd Name of vmlinux output file missing. Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64 boot: remove argv usageOlaf Hering2005-11-101-14/+18
| | | | | | | | | | | | | | Use a local variable for the input filenames. Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64 boot: remove local initializersOlaf Hering2005-11-101-28/+28
| | | | | | | | | | | | | | | | Remove initialization of local variables. They get all values assigned before use. Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: Move various ppc64 files with no ppc32 equivalent to powerpcDavid Gibson2005-11-105-478/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch moves a bunch of files from arch/ppc64 and include/asm-ppc64 which have no equivalents in ppc32 code into arch/powerpc and include/asm-powerpc. The file affected are: abs_addr.h compat.h lppaca.h paca.h tce.h cpu_setup_power4.S ioctl32.c firmware.c pacaData.c The only changes apart from the move and corresponding Makefile changes are: - #ifndef/#define in includes updated to _ASM_POWERPC_ form - trailing whitespace removed - comments giving full paths removed - pacaData.c renamed paca.c to remove studlyCaps - Misplaced { moved in lppaca.h Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64), built for 32-bit powermac (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | Merge ../linux-2.6Paul Mackerras2005-11-101-9/+6
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| * [PATCH] sched: resched and cpu_idle reworkNick Piggin2005-11-091-9/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make some changes to the NEED_RESCHED and POLLING_NRFLAG to reduce confusion, and make their semantics rigid. Improves efficiency of resched_task and some cpu_idle routines. * In resched_task: - TIF_NEED_RESCHED is only cleared with the task's runqueue lock held, and as we hold it during resched_task, then there is no need for an atomic test and set there. The only other time this should be set is when the task's quantum expires, in the timer interrupt - this is protected against because the rq lock is irq-safe. - If TIF_NEED_RESCHED is set, then we don't need to do anything. It won't get unset until the task get's schedule()d off. - If we are running on the same CPU as the task we resched, then set TIF_NEED_RESCHED and no further action is required. - If we are running on another CPU, and TIF_POLLING_NRFLAG is *not* set after TIF_NEED_RESCHED has been set, then we need to send an IPI. Using these rules, we are able to remove the test and set operation in resched_task, and make clear the previously vague semantics of POLLING_NRFLAG. * In idle routines: - Enter cpu_idle with preempt disabled. When the need_resched() condition becomes true, explicitly call schedule(). This makes things a bit clearer (IMO), but haven't updated all architectures yet. - Many do a test and clear of TIF_NEED_RESCHED for some reason. According to the resched_task rules, this isn't needed (and actually breaks the assumption that TIF_NEED_RESCHED is only cleared with the runqueue lock held). So remove that. Generally one less locked memory op when switching to the idle thread. - Many idle routines clear TIF_POLLING_NRFLAG, and only set it in the inner most polling idle loops. The above resched_task semantics allow it to be set until before the last time need_resched() is checked before going into a halt requiring interrupt wakeup. Many idle routines simply never enter such a halt, and so POLLING_NRFLAG can be always left set, completely eliminating resched IPIs when rescheduling the idle task. POLLING_NRFLAG width can be increased, to reduce the chance of resched IPIs. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Con Kolivas <kernel@kolivas.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [PATCH] sched: disable preempt in idle tasksNick Piggin2005-11-091-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Run idle threads with preempt disabled. Also corrected a bugs in arm26's cpu_idle (make it actually call schedule()). How did it ever work before? Might fix the CPU hotplugging hang which Nigel Cunningham noted. We think the bug hits if the idle thread is preempted after checking need_resched() and before going to sleep, then the CPU offlined. After calling stop_machine_run, the CPU eventually returns from preemption and into the idle thread and goes to sleep. The CPU will continue executing previous idle and have no chance to call play_dead. By disabling preemption until we are ready to explicitly schedule, this bug is fixed and the idle threads generally become more robust. From: alexs <ashepard@u.washington.edu> PPC build fix From: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> MIPS build fix Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] Memory Add Fixes for ppc64Mike Kravetz2005-11-081-0/+4
|/ | | | | | | ppc64 needs a special sysfs probe file for adding new memory. Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] Memory Add Fixes for ppc64Mike Kravetz2005-11-081-0/+1
| | | | | | | | | | | | | On Tue, Nov 08, 2005 at 08:12:56AM +1100, Benjamin Herrenschmidt wrote: > Yes, the MAX_ORDER should be different indeed. But can Kconfig do that ? > That is have the default value be different based on a Kconfig option ? > I don't see that ... We may have to do things differently here... This seems to be done in other parts of the Kconfig file. Using those as an example, this should keep the MAX_ORDER block size at 16MB. Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc64: More U3 device-tree fixesBenjamin Herrenschmidt2005-11-081-1/+1
| | | | | | | | Some more U3 revisions have the missing "interrupts" property in U3, this adds them to the fixup code in prom_init.c Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc64: SMU partition recoveryBenjamin Herrenschmidt2005-11-081-4/+20
| | | | | | | | | | This patch adds the ability to the SMU driver to recover missing calibration partitions from the SMU chip itself. It also adds some dynamic mecanism to /proc/device-tree so that new properties are visible to userland. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc64: SMU based macs cpufreq supportBenjamin Herrenschmidt2005-11-082-1/+81
| | | | | | | | CPU freq support using 970FX powertune facility for iMac G5 and SMU based single CPU desktop. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge ../linux-2.6Paul Mackerras2005-11-084-72/+84
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| * [PATCH] kfree cleanup: archJesper Juhl2005-11-072-5/+2
| | | | | | | | | | | | | | | | | | | | | | This is the arch/ part of the big kfree cleanup patch. Remove pointless checks for NULL prior to calling kfree() in arch/. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [PATCH] Kprobes: preempt_disable/enable() simplificationAnanth N Mavinakayanahalli2005-11-071-10/+15
| | | | | | | | | | | | | | | | | | | | | | Reorganize the preempt_disable/enable calls to eliminate the extra preempt depth. Changes based on Paul McKenney's review suggestions for the kprobes RCU changeset. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [PATCH] Kprobes: Use RCU for (un)register synchronization - arch changesAnanth N Mavinakayanahalli2005-11-071-18/+6
| | | | | | | | | | | | | | | | | | | | | | | | Changes to the arch kprobes infrastructure to take advantage of the locking changes introduced by usage of RCU for synchronization. All handlers are now run without any locks held, so they have to be re-entrant or provide their own synchronization. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [PATCH] Kprobes: Track kprobe on a per_cpu basis - ppc64 changesAnanth N Mavinakayanahalli2005-11-071-40/+54
| | | | | | | | | | | | | | | | | | | | | | PPC64 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu using an arch specific kprobe control block. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [PATCH] Kprobes: rearrange preempt_disable/enable() callsAnanth N Mavinakayanahalli2005-11-071-5/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following set of patches are aimed at improving kprobes scalability. We currently serialize kprobe registration, unregistration and handler execution using a single spinlock - kprobe_lock. With these changes, kprobe handlers can run without any locks held. It also allows for simultaneous kprobe handler executions on different processors as we now track kprobe execution on a per processor basis. It is now necessary that the handlers be re-entrant since handlers can run concurrently on multiple processors. All changes have been tested on i386, ia64, ppc64 and x86_64, while sparc64 has been compile tested only. The patches can be viewed as 3 logical chunks: patch 1: Reorder preempt_(dis/en)able calls patches 2-7: Introduce per_cpu data areas to track kprobe execution patches 8-9: Use RCU to synchronize kprobe (un)registration and handler execution. Thanks to Maneesh Soni, James Keniston and Anil Keshavamurthy for their review and suggestions. Thanks again to Anil, Hien Nguyen and Kevin Stafford for testing the patches. This patch: Reorder preempt_disable/enable() calls in arch kprobes files in preparation to introduce locking changes. No functional changes introduced by this patch. Signed-off-by: Ananth N Mavinakayahanalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [PATCH] ppc64: Fix zImage bootBenjamin Herrenschmidt2005-11-071-2/+9
| | | | | | | | | | | | | | | | | | | | | | The zImage wrapper has a bug where it doesn't claim() the memory for the kernel properly, it forgets to take into account the offset between the ELF header and the kernel itself. This results on some machines, like G5s, into a kernel that crashes at boot when clearing the BSS. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [PATCH] POWERPC/PPC64: Fix CONFIG_SMP=n build for ppc64Olof Johansson2005-11-071-0/+1
| | | | | | | | | | | | | | | | | | | | Two CONFIG_SMP=n build fixes due to missing <asm/smp.h> includes. Signed-off-by: Olof Johansson <olof@lixom.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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