summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kernel
Commit message (Collapse)AuthorAgeFilesLines
* [PATCH] powerpc: Add Virtex-4 FX to cpu tableGrant C. Likely2006-02-071-1/+11
| | | | | Signed-off-by: Grant C. Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: avoid timer interrupt replay effect when onlining cpuNathan Lynch2006-02-071-0/+3
| | | | | | | | | | | | When a cpu is hotplug-onlined, if we don't set per_cpu(last_jiffy) to something sane, timer_interrupt will execute its while loop for every tick missed since the cpu was last online (or since the system was booted, if we're adding a new cpu). This can cause weird hangs, ssh sessions dropping, and we can even go xmon if we take a global IPI at the wrong time. Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Don't use toc in decrementer_iSeries_maskedMichael Ellerman2006-02-071-2/+3
| | | | | | | | | | | Since 404849bbd2bfd62e05b36f4753f6e1af6050a824 we've been using LOAD_REG_ADDRBASE, which uses the toc pointer, in decrementer_iSeries_masked. This can explode if we take the decrementer interrupt while we're in a module, because the toc pointer in r2 will be the module's toc pointer. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] Don't check pointer for NULL before passing it to kfree ↵Jesper Juhl2006-02-071-2/+1
| | | | | | | | | | [arch/powerpc/kernel/rtas_flash.c] Checking a pointer for NULL before passing it to kfree is pointless, kfree does its own NULL checking of input. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: fix compile warning in udbg_init_maple_realmodeOlaf Hering2006-02-071-1/+1
| | | | | | | | arch/powerpc/kernel/udbg_16550.c: In function `udbg_init_maple_realmode': arch/powerpc/kernel/udbg_16550.c:162: warning: assignment from incompatible pointer type Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: add refcounting to setup_peg2 and of_get_pci_addressOlaf Hering2006-02-071-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | setup_peg2 must do some refcounting. of_get_pci_address may need to drop the node Pegasos l2cr : L2 cache was not active, activating PCI bus 0 controlled by pci at 80000000 Badness in kref_get at /home/olaf/kernel/olh/ppc64/linux-2.6.16-rc2-olh/lib/kref.c:32 Call Trace: [C037BD00] [C0007934] show_stack+0x5c/0x184 (unreliable) [C037BD30] [C000E068] program_check_exception+0x184/0x584 [C037BD90] [C000F5F0] ret_from_except_full+0x0/0x4c --- Exception: 700 at kref_get+0xc/0x24 LR = of_node_get+0x24/0x3c [C037BE50] [C004FD94] __pte_alloc_kernel+0x64/0x80 (unreliable) [C037BE70] [C000CA18] of_get_parent+0x34/0x58 [C037BE90] [C0009B18] of_get_address+0x24/0x174 [C037BED0] [C000A108] of_address_to_resource+0x24/0x68 [C037BF00] [C038B128] chrp_find_bridges+0x114/0x470 [C037BF90] [C038AE48] chrp_setup_arch+0x1fc/0x32c [C037BFB0] [C03849B0] setup_arch+0x144/0x188 [C037BFD0] [C037C45C] start_kernel+0x34/0x1a8 [C037BFF0] [000037A0] 0x37a0 Badness in kref_get at /home/olaf/kernel/olh/ppc64/linux-2.6.16-rc2-olh/lib/kref.c:32 Call Trace: [C037BC90] [C0007934] show_stack+0x5c/0x184 (unreliable) [C037BCC0] [C000E068] program_check_exception+0x184/0x584 [C037BD20] [C000F5F0] ret_from_except_full+0x0/0x4c --- Exception: 700 at kref_get+0xc/0x24 LR = of_node_get+0x24/0x3c [C037BDE0] [00000000] 0x0 (unreliable) [C037BE00] [C000CA18] of_get_parent+0x34/0x58 [C037BE20] [C0009CE8] of_translate_address+0x2c/0x2fc [C037BEA0] [C0009FE8] __of_address_to_resource+0x30/0xc4 [C037BED0] [C000A130] of_address_to_resource+0x4c/0x68 [C037BF00] [C038B128] chrp_find_bridges+0x114/0x470 [C037BF90] [C038AE48] chrp_setup_arch+0x1fc/0x32c [C037BFB0] [C03849B0] setup_arch+0x144/0x188 [C037BFD0] [C037C45C] start_kernel+0x34/0x1a8 [C037BFF0] [000037A0] 0x37a0 PCI bus 0 controlled by pci at c0000000 Top of RAM: 0x10000000, Total RAM: 0x10000000 Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: remove pointer/integer confusion in of_find_node_by_nameOlaf Hering2006-02-071-2/+2
| | | | | | | remove pointer/integer confusion Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: remove pointer/integer confusion in generic_calibrate_decrOlaf Hering2006-02-071-4/+4
| | | | | | | remove pointer/integer confusion Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Don't overwrite flat device tree with kdump kernelMichael Ellerman2006-02-072-0/+30
| | | | | | | | | | | | | | It's possible for prom_init to allocate the flat device tree inside the kdump crash kernel region. If this happens, when we load the kdump kernel we overwrite the flattened device tree, which is bad. We could make prom_init try and avoid allocating inside the crash kernel region, but then we run into issues if the crash kernel region uses all the space inside the RMO. The easiest solution is to move the flat device tree once we're running in the kernel. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: remove useless call to touch_softlockup_watchdogDave C Boutcher2006-02-071-4/+0
| | | | | | | | | | | | | It turns out that we can't stop the watchdog from triggering here. If we touch the timer (which just uses the current jiffie value) before we enable interrupts, it does nothing because jiffies are not mass-updated until after we enable interrupts. If we touch the timer after we enable interrupts, its too late because the softlockup watchdog will already have triggered. The touch_softlockup_watchdog call removed below does nothing. Signed-off-by: Dave Boutcher <sleddog@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: prod all processors after ibm,suspend-meDave C Boutcher2006-02-071-0/+3
| | | | | | | | We need to prod everyone here since this is the only CPU that is guaranteed to be running after the ibm,suspend-me RTAS call returns. Signed-off-by: Dave Boutcher <sleddog@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: return correct rtas status from ibm,suspend-meDave C Boutcher2006-02-071-2/+2
| | | | | | | | Correctly return the status from the RTAS call. rtas_call expects to return the status as a return value. Signed-off-by: Dave Boutcher <sleddog@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Fix !SMP build of rtas.cMichael Ellerman2006-02-071-0/+1
| | | | | | | | arch/powerpc/kernel/rtas.c is getting hvcall.h via spinlock.h, but when we're building for UP we don't include spinlock.h. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: IOMMU SG paranoiaJake Moilanen2006-02-071-3/+6
| | | | | | | | | | | | | | | | | This addresses two items, which are unlikely to be hit if we trust drivers. The first is moving a memory barrier below where the vmerged SG count is passed back, but before the list is set to end. If those instructions were reordered, there could be an issue in iommu_unmap_sg(). The second is making sure we terminate the list on the failure case of iommu_map_sg(). If a driver does not look at the failure return code, it could pass a ill-formed SG list to iommu_unmap_sg(). Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Refuse to boot a kdump kernel via OFMichael Ellerman2006-02-071-0/+4
| | | | | | | | | | | | You can't boot a kdump kernel via OF, not reliably anyway, the kernel being at 32 MB conflicts with the zImage wrapper etc. and it blows up. It's trivial to check in prom_init though, and this is early enough that we can actually drop back to OF where a reset-all will get you going again, which is kinda nice. I think this should go in for 2.6.16. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Don't allocate zero bytes in finish_device_tree()Michael Ellerman2006-02-071-1/+6
| | | | | | | | | | | | In prom.c we run finish_node() on allnodes twice. The first time we just calculate how much memory we'll need, the second time we do the actual work. If the calculation stage determines that we need 0 bytes, then we should skip the lmb allocation. Although an alloc of zero will work, it has been seen to lead to a BUG_ON() in reserve_bootmem() on at least one machine. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc/64: Fix bug in setting floating-point exception modePaul Mackerras2006-02-071-1/+1
| | | | | | | | | When loading up the FPU, we were using a 'ld' (load doubleword) instruction to get the FP exception mode from the thread_struct, but it's only an int field. This changes the ld to lwz (load word and zero-extend). Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Fix sigmask handling in sys_sigsuspend.Heiko Carstens2006-02-011-3/+1
| | | | | | | | | | Better save the sigmask instead of throwing it away so it can be restored. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: 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>
* [PATCH] CONFIG_ISA does not make sense for CONFIG_PPC_PSERIESOlaf Hering2006-02-011-4/+0
| | | | | | | | | | | | Older pSeries systems with serial ports dont get any console output after recent changes. CONFIG_ISA does not make sense for CONFIG_PPC_PSERIES because it enables lots of old drivers. Instead, remove the dependency on CONFIG_ISA from the serial port discovery code. Signed-off-by: Olaf Hering <olh@suse.de> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] TIF_RESTORE_SIGMASK support for arch/powerpcDavid Woodhouse2006-01-185-12/+40
| | | | | | | | | | | Implement the TIF_RESTORE_SIGMASK flag in the new arch/powerpc kernel, for both 32-bit and 64-bit system call paths. Signed-off-by: David Woodhouse <dwmw2@infradead.org> 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>
* [PATCH] Generic sys_rt_sigsuspend()David Woodhouse2006-01-182-87/+5
| | | | | | | | | | | | The TIF_RESTORE_SIGMASK flag allows us to have a generic implementation of sys_rt_sigsuspend() instead of duplicating it for each architecture. This provides such an implementation and makes arch/powerpc use it. It also tidies up the ppc32 sys_sigsuspend() to use TIF_RESTORE_SIGMASK. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* powerpc/32: Restore previous version of 32-bit PCI codePaul Mackerras2006-01-152-1/+1899
| | | | | | | | | When I removed the powermac support from arch/ppc/kernel/pci.c, I overlooked the fact that that file is used in 32-bit ARCH=powerpc builds. To prevent problems in future, restore the original version of that file as arch/powerpc/kernel/pci_32.c, and use that. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Fix kdump copy regs and dynamic allocate per-cpu crash notesHaren Myneni2006-01-152-73/+7
| | | | | | | | | | | | | | | | - This contains the arch specific changes for the following the kdump generic fixes which were already accepted in the upstream. . Capturing CPU registers (for the case of 'panic' and invoking the dump using 'sysrq-trigger') from a function (stack frame) which will be not be available during the kdump boot. Hence, might result in invalid stack trace. . Dynamically allocating per cpu ELF notes section instead of statically for NR_CPUS. - Fix the compiler warning in prom_init.c. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6Linus Torvalds2006-01-142-6/+6
|\
| * [PATCH] Add vio_bus_type probe and remove methodsRussell King2006-01-131-4/+4
| | | | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| * [PATCH] Add of_platform_bus_type probe and remove methodsRussell King2006-01-131-2/+2
| | | | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | [PATCH] powerpc: Recognize /chaos bridge on old pmacs as PCIPaul Mackerras2006-01-141-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The first generation of PCI powermacs had a host bridge called /chaos which was for all intents and purposes a PCI host bridge, but has a device_type of "vci" in the device tree (presumably it's not really PCI at the hardware level or something). The OF parsing stuff in arch/powerpc/kernel/prom_parse.c currently doesn't recognize it as a PCI bridge, which means that controlfb.c can't get its device addresses. This makes prom_parse.c recognize a device_type of "vci" as indicating a PCI host bridge. With this, controlfb works again. Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: special-case ibm,suspend-me RTAS callDave C Boutcher2006-01-141-1/+95
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Handle the ibm,suspend-me RTAS call specially. It needs to be wrapped in a set of synchronization hypervisor calls (H_Join). When the H_Join calls are made on all CPUs, the intent is that only one will return with H_Continue, meaning that he is the "last man standing". That CPU then issues the ibm,suspend-me call. What is interesting, of course, is that the CPU running when the rtas syscall is made, may NOT be the CPU that ultimately executes the ibm,suspend-me rtas call. Signed-off-by: Dave Boutcher <sleddog@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: Add MPC834x SYS board to arch/powerpcKumar Gala2006-01-141-2/+1
| | | | | | | | | | | | | | Add the first MPC83xx board that uses a flat device tree to arch/powerpc. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: Allow for ppc_md restart, power_off, and halt to be NULLKumar Gala2006-01-141-3/+6
| | | | | | | | | | | | | | | | | | | | On a number of embedded reference boards there isn't always a way to reset, power_off, or halt the board. Rather than having each board implement a spin loop just let the generic code do it. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: oprofile cpu type names clash with other codeAndy Whitcroft2006-01-141-26/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In 2.6.15-git6 a change was commited in the oprofile support in the powerpc architecture. It introduced the powerpc_oprofile_type which contains the define G4. This causes a name clash with the existing wacom usb tablet driver. CC [M] drivers/usb/input/wacom.o drivers/usb/input/wacom.c:98: error: conflicting types for `G4' include/asm/cputable.h:37: error: previous declaration of `G4' CC [M] drivers/usb/mon/mon_text.o make[3]: *** [drivers/usb/input/wacom.o] Error 1 make[2]: *** [drivers/usb/input] Error 2 The elements of an enum declared in global scope are effectivly global identifiers themselves. As such we need to ensure the names are unique. This patch updates the later oprofile support to use unique names. Signed-off-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | powerpc: Provide a suitable AT_PLATFORM valuePaul Mackerras2006-01-141-44/+128
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The glibc folks want to use AT_PLATFORM to select between possible alternative versions of shared libraries. This commit makes the kernel supply an AT_PLATFORM string that indicates what class of processor we are running on. Processors with the same set of user-level instructions and roughly the same instruction scheduling characteristics are given the same AT_PLATFORM value; for example, 821, 823 and 860 are all reported as "ppc823", and 7447, 7447A, 7448, 7450, 7451, 7455 are all called "ppc7450". The intention is that the AT_PLATFORM values match the values that gcc accepts for the -mcpu= option. For values which are numeric (e.g. -mcpu=750), "ppc" has been prepended. This also adds a PPC_FEATURE_BOOKE bit to the AT_HWCAP value and sets it for the 440 family and the Freescale 85xx family. Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: Remove lppaca structure from the PACADavid Gibson2006-01-137-40/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At present the lppaca - the structure shared with the iSeries hypervisor and phyp - is contained within the PACA, our own low-level per-cpu structure. This doesn't have to be so, the patch below removes it, making a separate array of lppaca structures. This saves approximately 500*NR_CPUS bytes of image size and kernel memory, because we don't need aligning gap between the Linux and hypervisor portions of every PACA. On the other hand it means an extra level of dereference in many accesses to the lppaca. The patch also gets rid of several places where we assign the paca address to a local variable for no particular reason. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: Cleanup LOADADDR etc. asm macrosDavid Gibson2006-01-138-69/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch consolidates the variety of macros used for loading 32 or 64-bit constants in assembler (LOADADDR, LOADBASE, SET_REG_TO_*). The idea is to make the set of macros consistent across 32 and 64 bit and to make it more obvious which is the appropriate one to use in a given situation. The new macros and their semantics are described in the comments in ppc_asm.h. In the process, we change several places that were unnecessarily using immediate loads on ppc64 to use the GOT/TOC. Likewise we cleanup a couple of places where we were clumsily subtracting PAGE_OFFSET with asm instructions to use assemble-time arithmetic or the toreal() macro instead. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: Add of_find_property functionDave C Boutcher2006-01-131-6/+13
| | | | | | | | | | | | | | | | | | Add an of_find_property function that returns a struct property given a property name. Then change the get_property function to use that routine internally. Signed-off-by: Dave Boutcher <sleddog@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: Add/remove/update properties in firmware device treeDave C Boutcher2006-01-131-2/+88
|/ | | | | | | | | | | | | | | | | | Add support for updating and removing device tree properties. Since we hand out pointers to properties with gay abandon, we can't just free the property storage. Instead we move deleted, or the old copy of an updated property, to a "dead properties" list. Also note, its not feasable to kref device tree properties. we call get_property() all over the kernel in a wild variety of contexts. One consequence of this change is that we now take a read_lock(&devtree_lock) when doing get_property(). Signed-off-by: Dave Boutcher <sleddog@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-mergeLinus Torvalds2006-01-127-37/+59
|\ | | | | | | | | | | | | Fix up delete/modify conflict of arch/ppc/kernel/process.c by hand (it's gone, gone, gone). Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * powerpc: make ARCH=ppc use arch/powerpc/kernel/process.cPaul Mackerras2006-01-122-3/+5
| | | | | | | | | | | | | | | | | | | | Commit 5388fb1025443ec223ba556b10efc4c5f83f8682 made signal_32.c use discard_lazy_cpu_state, which broke ARCH=ppc because that uses the common signal_32.c but has its own process.c. Make ARCH=ppc use the common process.c to fix this and to reduce the amount of duplicated code. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [PATCH] powerpc: small pci cleanupsStephen Rothwell2006-01-121-2/+3
| | | | | | | | | | | | | | | | pcibios_claim_one_bus is not needed on iSeries and phbs_remap_io can be mode static. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [PATCH] powerpc: Fixed memory reserve map layoutKumar Gala2006-01-122-8/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | powerpc: Fixed memory reserve map layout The memory reserve map is suppose to be a pair of 64-bit integers to represent each region. On ppc32 the code was treating the pair as two 32-bit integers. Additional the prom_init code was producing the wrong layout on ppc32. Added a simple check to try to provide backwards compatibility. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [PATCH] powerpc: Avoid potential FP corruption with preempt and UPPaul Mackerras2006-01-123-24/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Heikki Lindholm pointed out that there was a potential race with the lazy CPU state (FP, VR, EVR) stuff if preempt is enabled. The race is that in the process of restoring FP state on sigreturn, the task gets preempted by a user task that wants to use the FPU. It will take an FP unavailable exception, which will write the current FPU state to the thread_struct, overwriting the values which sigreturn has stored. Note that this can only happen on UP since we don't implement lazy CPU state on SMP. The fix is to flush the lazy CPU state before updating the thread_struct. To do this we re-use the flush_lazy_cpu_state() function from process.c. Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: task_stack_page()Al Viro2006-01-121-6/+4
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] powerpc: task_thread_info()Al Viro2006-01-123-7/+7
|/ | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] capable/capability.h (arch/)Randy Dunlap2006-01-111-0/+1
| | | | | | | | arch: Use <linux/capability.h> where capable() is used. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] kprobes: fix race in recovery of reentrant probeKeshavamurthy Anil S2006-01-111-0/+12
| | | | | | | | | | | | | | | | | There is a window where a probe gets removed right after the probe is hit on some different cpu. In this case probe handlers can't find a matching probe instance related to break address. In this case we need to read the original instruction at break address to see if that is not a break/int3 instruction and recover safely. Previous code had a bug where we were not checking for the above race in case of reentrant probes and the below patch fixes this race. Tested on IA64, Powerpc, x86_64. 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] powerpc: Don't build crash.c for PPC32Michael Ellerman2006-01-111-2/+2
| | | | | | | | | | arch/powerpc/kernel/crash.c isn't safe for PPC32 (yet?), so don't build it. Built with CONFIG_KEXEC=y for pmac32_defconfig, pseries_defconfig, and g5_defconfig. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Add some missing .gitignore'sKumar Gala2006-01-112-0/+2
| | | | | | | ignore generated files under arch/powerpc Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: fix for compile problem in kdump code when SMP disabledHaren Myneni2006-01-111-1/+1
| | | | | | | | | | This patch fixes the compilation error (shown below) when CONFIG_SMP=n. arch/powerpc/kernel/crash.c: In function `crash_kexec_prepare_cpus': arch/powerpc/kernel/crash.c:236: error: implicit declaration of function `smp_release_cpus' Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Fix compile error when CONFIG_PROC_VMCORE is not definedPaul Mackerras2006-01-111-0/+2
| | | | | | We were getting elfcorehdr_addr undefined in this case. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc/64: per cpu data optimisationsAnton Blanchard2006-01-111-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current ppc64 per cpu data implementation is quite slow. eg: lhz 11,18(13) /* smp_processor_id() */ ld 9,.LC63-.LCTOC1(30) /* per_cpu__variable_name */ ld 8,.LC61-.LCTOC1(30) /* __per_cpu_offset */ sldi 11,11,3 /* form index into __per_cpu_offset */ mr 10,9 ldx 9,11,8 /* __per_cpu_offset[smp_processor_id()] */ ldx 0,10,9 /* load per cpu data */ 5 loads for something that is supposed to be fast, pretty awful. One reason for the large number of loads is that we have to synthesize 2 64bit constants (per_cpu__variable_name and __per_cpu_offset). By putting __per_cpu_offset into the paca we can avoid the 2 loads associated with it: ld 11,56(13) /* paca->data_offset */ ld 9,.LC59-.LCTOC1(30) /* per_cpu__variable_name */ ldx 0,9,11 /* load per cpu data Longer term we can should be able to do even better than 3 loads. If per_cpu__variable_name wasnt a 64bit constant and paca->data_offset was in a register we could cut it down to one load. A suggestion from Rusty is to use gcc's __thread extension here. In order to do this we would need to free up r13 (the __thread register and where the paca currently is). So far Ive had a few unsuccessful attempts at doing that :) The patch also allocates per cpu memory node local on NUMA machines. This patch from Rusty has been sitting in my queue _forever_ but stalled when I hit the compiler bug. Sorry about that. Finally I also only allocate per cpu data for possible cpus, which comes straight out of the x86-64 port. On a pseries kernel (with NR_CPUS == 128) and 4 possible cpus we see some nice gains: total used free shared buffers cached Mem: 4012228 212860 3799368 0 0 162424 total used free shared buffers cached Mem: 4016200 212984 3803216 0 0 162424 A saving of 3.75MB. Quite nice for smaller machines. Note: we now have to be careful of per cpu users that touch data for !possible cpus. At this stage it might be worth making the NUMA and possible cpu optimisations generic, but per cpu init is done so early we have to be careful that all architectures have their possible map setup correctly. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-25 05:17:52 +0000