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2008-07-01powerpc: Move code patching code into arch/powerpc/lib/code-patching.cMichael Ellerman
We currently have a few routines for patching code in asm/system.h, because they didn't fit anywhere else. I'd like to clean them up a little and add some more, so first move them into a dedicated C file - they don't need to be inlined. While we're moving the code, drop create_function_call(), it's intended caller never got merged and will be replaced in future with something different. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-01powerpc: Move common module code into its own fileKumar Gala
Refactor common code between ppc32 and ppc64 module handling into a shared filed. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-01powerpc: Tell firmware we support architecture V2.06Joel Schopp
Add the bits to the architecture-vec so that ibm,client-architecture lets the firmware know we support the 2.06 architecture. Signed-off-by: Joel Schopp <jschopp@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-07-01powerpc: Add cputable entry for Power7 architected modeJoel Schopp
Add an entry for Power7 architected mode and add "(raw)" to Power7 raw mode to distinguish it more clearly. Signed-off-by: Joel Schopp <jschopp@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-30powerpc: Add cputable entry for POWER7Michael Neuling
Add a cputable entry for the POWER7 processor. Also tell firmware that we know about POWER7. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Joel Schopp <jschopp@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-30powerpc: Increase CRASH_HANDLER_MAXArnd Bergmann
There are now two potential callers of machine_crash_shutdown, so increase the limit accordingly. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-30Merge branch 'linux-2.6'Paul Mackerras
2008-06-30Merge branch 'next' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx
2008-06-26on_each_cpu(): kill unused 'retry' parameterJens Axboe
It's not even passed on to smp_call_function() anymore, since that was removed. So kill it. Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-06-26smp_call_function: get rid of the unused nonatomic/retry argumentJens Axboe
It's never used and the comments refer to nonatomic and retry interchangably. So get rid of it. Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-06-26powerpc: convert to generic helpers for IPI function callsJens Axboe
This converts ppc to use the new helpers for smp_call_function() and friends, and adds support for smp_call_function_single(). ppc loses the timeout functionality of smp_call_function_mask() with this change, as the generic code does not provide that. Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2008-06-26powerpc/booke: Add kprobes support for booke style processorsKumar Gala
This patch is based on work done by Madhvesh. R. Sulibhavi back in March 2007. We refactor some of the single step handling since it differs between "classic" and "booke" powerpc cores. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-06-26powerpc/kprobes: Some minor fixesKumar Gala
* Mark __flush_icache_range as a function that can't be probed since its used by the kprobe code. * Fix an issue with single stepping and async exceptions. We need to ensure that we dont get an async exception (external, decrementer, etc) while we are attempting to single step the probe point. Added a check to ensure we only handle a single step if its really intended for the instruction in question. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-06-26powerpc/e500mc: flush L2 on NAP for e500mcKumar Gala
If we have an L2CSR register (e500mc) we need to flush the L2 before going to nap. We use the HW flush mechanism provided in that register. The code reuses the CPU_FTR_604_PERF_MON bit as it is no longer used by any code in the kernel. Additionally we didn't reuse the exist L2CR feature bit as this is intended for the 7xxx L2CR register and L2CSR is part of the new Freescale "Book-E" registers. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-06-26powerpc/85xx: add DOZE/NAP support for e500 coreKumar Gala
The e500 core enter DOZE/NAP power-saving modes when the core go to cpu_idle routine. The power management default running mode is DOZE, If the user echo 1 > /proc/sys/kernel/powersave-nap the system will change to NAP running mode. Signed-off-by: Dave Liu <daveliu@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-06-23ftrace: store mcount address in rec->ipAbhishek Sagar
Record the address of the mcount call-site. Currently all archs except sparc64 record the address of the instruction following the mcount call-site. Some general cleanups are entailed. Storing mcount addresses in rec->ip enables looking them up in the kprobe hash table later on to check if they're kprobe'd. Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com> Cc: davem@davemloft.net Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-23Merge branch 'linus' into tracing/ftraceIngo Molnar
2008-06-20Reinstate ZERO_PAGE optimization in 'get_user_pages()' and fix XIPLinus Torvalds
KAMEZAWA Hiroyuki and Oleg Nesterov point out that since the commit 557ed1fa2620dc119adb86b34c614e152a629a80 ("remove ZERO_PAGE") removed the ZERO_PAGE from the VM mappings, any users of get_user_pages() will generally now populate the VM with real empty pages needlessly. We used to get the ZERO_PAGE when we did the "handle_mm_fault()", but since fault handling no longer uses ZERO_PAGE for new anonymous pages, we now need to handle that special case in follow_page() instead. In particular, the removal of ZERO_PAGE effectively removed the core file writing optimization where we would skip writing pages that had not been populated at all, and increased memory pressure a lot by allocating all those useless newly zeroed pages. This reinstates the optimization by making the unmapped PTE case the same as for a non-existent page table, which already did this correctly. While at it, this also fixes the XIP case for follow_page(), where the caller could not differentiate between the case of a page that simply could not be used (because it had no "struct page" associated with it) and a page that just wasn't mapped. We do that by simply returning an error pointer for pages that could not be turned into a "struct page *". The error is arbitrarily picked to be EFAULT, since that was what get_user_pages() already used for the equivalent IO-mapped page case. [ Also removed an impossible test for pte_offset_map_lock() failing: that's not how that function works ] Acked-by: Oleg Nesterov <oleg@tv-sign.ru> Acked-by: Nick Piggin <npiggin@suse.de> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-06-18powerpc/booke: Add support for new e500mc coreKumar Gala
The new e500mc core from Freescale is based on the e500v2 but with the following changes: * Supports only the Enhanced Debug Architecture (DSRR0/1, etc) * Floating Point * No SPE * Supports lwsync * Doorbell Exceptions * Hypervisor * Cache line size is now 64-bytes (e500v1/v2 have a 32-byte cache line) Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-06-18[POWERPC] 4xx: Clear new TLB cache attribute bits in Data Storage vectorJosh Boyer
A recent commit added support for the new 440x6 and 464 cores that have the added WL1, IL1I, IL1D, IL2I, and ILD2 bits for the caching attributes in the TLBs. The new bits were cleared in the finish_tlb_load function, however a similar bit of code was missed in the DataStorage interrupt vector. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-16Merge branch 'linus' into core/rodataIngo Molnar
2008-06-16Merge branch 'linus' into tracing/ftraceIngo Molnar
2008-06-16[POWERPC] Remove ppc32's export of console_driversStephen Rothwell
There are no in-tree uses of the export any more and in linux-next there is a change that exports it globally which causes warnings: WARNING: vmlinux: 'console_drivers' exported twice. Previous export was in vmlinux and in one case (mpc85xx_defconfig) a build error: kernel/built-in.o: In function `__crc_console_drivers': (*ABS*+0x1eb0e6f5): multiple definition of `__crc_console_drivers' So remove the export now. Also, there is no longer any need to include linux/console.h. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-16[POWERPC] Fix -Os kernel builds with newer gcc versionsKumar Gala
GCC 4.4.x looks to be adding support for generating out-of-line register saves/restores based on: http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html This breaks the kernel if we enable CONFIG_CC_OPTIMIZE_FOR_SIZE. To fix this we add the use the save/restore code from gcc and simplified it down for our needs (integer only). Additionally, we have to link this code into each module. The other solution was to add EXPORT_SYMBOL() which meant going through the trampoline which seemed nonsensical for these out-of-line routines. Finally, we add some checks to prom_init_check.sh to ignore the out-of-line save/restore functions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-16[POWERPC] Fix return value check logic in debugfs virq_mapping setupEmil Medve
debugfs_create_file() returns a non-NULL (non-zero) value in case of success, not a NULL value. This fixes this non-critical boot-time debugging error message: [ 1.316386] calling irq_debugfs_init+0x0/0x50 [ 1.316399] initcall irq_debugfs_init+0x0/0x50 returned -12 after 0 msecs [ 1.316411] initcall irq_debugfs_init+0x0/0x50 returned with error code -12 Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Acked-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-11powerpc/booke: Fix some comments related to debug level exceptionsKumar Gala
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-06-11Revert "[POWERPC] 4xx: Fix 460GT support to not enable FPU"Josh Boyer
This reverts commit acb0142bf01c0ebe18f09e37814451ee6a873e27. AMCC has indicated that the PPC 460GT does have FPU support. This revert enables the FPU for those chips again. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2008-06-10ftrace: remove ftrace_ip_converted()Abhishek Sagar
Remove the unneeded function ftrace_ip_converted(). Signed-off-by: Abhishek Sagar <sagar.abhishek@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-09powerpc: Fix irq_alloc_host() reference counting and callersMichael Ellerman
When I changed irq_alloc_host() to take an of_node (52964f87c64e6c6ea671b5bf3030fb1494090a48: "Add an optional device_node pointer to the irq_host"), I botched the reference counting semantics. Stephen pointed out that it's irq_alloc_host()'s business if it needs to take an additional reference to the device_node, the caller shouldn't need to care. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-09powerpc: Add the PC speaker only when requestedEmil Medve
This eliminates this minor boot-time debugging error message: [ 1.316451] calling add_pcspkr+0x0/0x84 [ 1.316478] initcall add_pcspkr+0x0/0x84 returned -19 after 0 msecs Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-09Merge branch 'merge'Paul Mackerras
Conflicts: arch/powerpc/sysdev/fsl_soc.c
2008-06-09[POWERPC] Use dev_set_name in pci_64.cStephen Rothwell
During the next merge window, pci_name()'s return value will become const, so use the new dev_set_name() instead to avoid the warning (from linux-next): arch/powerpc/kernel/pci_64.c: In function 'of_create_pci_dev': arch/powerpc/kernel/pci_64.c:193: warning: passing argument 1 of 'sprintf' discards qualifiers from pointer target type Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-09[POWERPC] Fix incorrect enabling of VMX when building signal or user contextBenjamin Herrenschmidt
When building a signal or a ucontext, we can incorrectly set the MSR_VEC bit of the kernel pt_regs->msr before returning to userspace if the task -ever- used VMX. This can lead to funny result if that stack used it in the past, then "lost" it (ie. it wasn't enabled after a context switch for example) and then called get_context. It can end up with VMX enabled and the registers containing values from some other task. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-02[POWERPC] 40x/Book-E: Save/restore volatile exception registersKumar Gala
On machines with more than one exception level any system register that might be modified by the "normal" exception level needs to be saved and restored on taking a higher level exception. We already are saving and restoring ESR and DEAR. For critical level add SRR0/1. For debug level add CSRR0/1 and SRR0/1. For machine check level add DSRR0/1, CSRR0/1, and SRR0/1. On FSL Book-E parts we always save/restore the MAS registers for critical, debug, and machine check level exceptions. On 44x we always save/restore the MMUCR. Additionally, we save and restore the ksp_limit since we have to adjust it for each exception level. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-06-02[POWERPC] Rework EXC_LEVEL_EXCEPTION_PROLOG codeKumar Gala
* Cleanup the code a bit my allocating an INT_FRAME on our exception stack there by make references go from GPR11-INT_FRAME_SIZE(r8) to just GPR11(r8) * simplify {lvl}_transfer_to_handler code by moving the copying of the temp registers we use if we come from user space into the PROLOG * If the exception came from kernel mode copy thread_info flags, preempt, and task pointer from the process thread_info. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-06-02[POWERPC] Move to runtime allocated exception stacksKumar Gala
For the additonal exception levels (critical, debug, machine check) on 40x/book-e we were using "static" allocations of the stack in the associated head.S. Move to a runtime allocation to make the code a bit easier to read as we mimic how we handle IRQ stacks. Its also a bit easier to setup the stack with a "dummy" thread_info in C code. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org>
2008-05-26ftrace: powerpc clean upsSteven Rostedt
This patch cleans up the ftrace code in PowerPC based on the comments from Michael Ellerman. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: proski@gnu.org Cc: a.p.zijlstra@chello.nl Cc: Pekka Paalanen <pq@iki.fi> Cc: Steven Rostedt <srostedt@redhat.com> Cc: linuxppc-dev@ozlabs.org Cc: Soeren Sandmann Pedersen <sandmann@redhat.com> Cc: paulus@samba.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-25move BUG_TABLE into RODATAJan Beulich
Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-23ftrace: support for PowerPCSteven Rostedt
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>
2008-05-23Merge branch 'merge' into powerpc-nextPaul Mackerras
2008-05-23[POWERPC] Add kernstart_addr to list of allowed symbols in prom_initMichael Ellerman
Since commit "85xx: Add support for relocatable kernel (and booting at non-zero)" (37dd2badcfcec35f5e21a0926968d77a404f03c3), PHYSICAL_START is #defined as kernstart_addr if RELOCATABLE and FLATMEM is enabled. PHYSICAL_START is used in prom_init.c and so kernstart_addr needs to be added to the list of allowed symbols that prom_init.c can access. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-23[POWERPC] Remove unnecessary cast in arch_deref_entry_point()Michael Ellerman
func_descr_t->entry is already an unsigned long. Mea culpa. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-23[POWERPC] Tweak VDSO linker script to avoid upsetting old binutilsRoland McGrath
This works around bugs in older binutils' objcopy. The placement of these sections does not really matter, but it confused the buggy old BFD libraries. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-16[PATCH] take init_files to fs/file.cAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-05-16[POWERPC] Move of_device_get_modalias to drivers/ofStephen Rothwell
Commit 140b932f8cb6cced10b96860651a198b1b89cbb9 ("Create modalias file in sysfs for of_platform bus") needs this to avoid breaking the sparc builds. Just move the code and add whitespace around some binary operators. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-16[POWERPC] Defer processing of interrupts when the CPU wakes from sleep modePaul Mackerras
This provides a way to defer processing of an interrupt that wakes the processor out of sleep mode. On 32-bit platforms that use an interrupt to wake the processor, we have to have interrupts enabled in hardware at the point where we go to sleep, otherwise the processor will never wake up. However, because interrupts are logically disabled at this point, we don't want to process the interrupt straight away. This is handled by setting the _TLF_SLEEPING flag. When we get an interrupt and _TLF_SLEEPING is set, we firstly clear the MSR_EE (external interrupt enable) bit in the saved MSR value, and secondly we then return to the address in the link register, like we do for _TLF_NAPPING, but without actually handling the interrupt. Note that this is handled somewhat differently on powerbooks, so this new code will only be used on non-Apple machines. Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14[POWERPC] Fix sparse warnings in arch/powerpc/kernelMichael Ellerman
Make a few things static in lparcfg.c Make init and exit routines static in rtas_flash.c Make things static in rtas_pci.c Make some functions static in rtas.c Make fops static in rtas-proc.c Remove unneeded extern for do_gtod in smp.c Make clocksource_init() static in time.c Make last_tick_len and ticklen_to_xs static in time.c Move the declaration of the pvr per-cpu into smp.h Make kexec_smp_down() and kexec_stack static in machine_kexec_64.c Don't return void in arch_teardown_msi_irqs() in msi.c Move declaration of GregorianDay()into asm/time.h Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14[POWERPC] Set lower flag bits in regs->trap to indicate debug level exceptionKumar Gala
We use the low bits of regs->trap as flag bits. We already indicate critical and machine check level exceptions via this mechanism. Extend it to indicate debug level exceptions. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-14[POWERPC] Define and use TLF_RESTORE_SIGMASKRoland McGrath
Replace TIF_RESTORE_SIGMASK with TLF_RESTORE_SIGMASK and define our own set_restore_sigmask() function. This saves the costly SMP-safe set_bit operation, which we do not need for the sigmask flag since TIF_SIGPENDING always has to be set too. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-05-12[POWERPC] ppc: Don't run prom_init_check for arch/ppc buildsSegher Boessenkool
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>