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* [POWERPC] kprobes: Fix possible system crash during out-of-line single-steppingAnanth N Mavinakayanahalli2006-08-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - On archs that have no-exec support, we vmalloc() a executable scratch area of PAGE_SIZE and divide it up into an array of slots of maximum instruction size for that arch - On a kprobe registration, the original instruction is copied to the first available free slot, so if multiple kprobes are registered, chances are, they get contiguous slots - On POWER4, due to not having coherent icaches, we could hit a situation where a probe that is registered on one processor, is hit immediately on another. This second processor could have fetched the stream of text from the out-of-line single-stepping area *before* the probe registration completed, possibly due to an earlier (and a different) kprobe hit and hence would see stale data at the slot. Executing such an arbitrary instruction lead to a problem as reported in LTC bugzilla 23555. The correct solution is to call flush_icache_range() as soon as the instruction is copied for out-of-line single-stepping, so the correct instruction is seen on all processors. Thanks to Will Schmidt who tracked this down. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by: Will Schmidt <will_schmidt@vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Make crash.c work on 32-bit and 64-bitMichael Ellerman2006-08-17
| | | | | | | | | To compile kexec on 32-bit we need a few more bits and pieces. Rather than add empty definitions, we can make crash.c work on 32-bit, with only a couple of kludges. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Move some kexec logic into machine_kexec.cMichael Ellerman2006-08-17
| | | | | | | | | We're missing a few functions for kexec to compile on 32-bit. There's nothing really 64-bit specific about the 64-bit versions, so make them generic rather than adding empty definitions for 32-bit. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Make secondary CPUs call into kdump on reset exceptionDavid Wilder2006-08-17
| | | | | | | | | | | | | | | | | | | | In the case of a system hang, the user will invoke soft-reset to initiate the kdump boot. If xmon is enabled, the CPU(s) enter into the xmon debugger. Unfortunately, the secondary CPU(s) will return to the hung state when they exit from the debugger (returned from die() -> system_reset_exception()). This causes a problem in kdump since the hung CPU(s) will not respond to the IPI sent from kdump. This patch fixes the issue by calling crash_kexec_secondary() directly from system_reset_exception() without returning to the previous state. These secondary CPUs wait 5ms until the kdump boot is started by the primary CPU. In the case we exited from the debugger to "recover" (command 'x' in xmon) the primary and the secondary CPUs will all return from die() -> system_reset_exception() ->crash_kexec_secondary() wait 5ms, then return to the previous state. A kdump boot is not started in this case. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: David Wilder <dwilder@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [POWERPC] Fix might-sleep warning on removing cpusHaren Myneni2006-08-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Noticing the following might_sleep warning (dump_stack()) during kdump testing when CONFIG_DEBUG_SPINLOCK_SLEEP is enabled. All secondary CPUs will be calling rtas_set_indicator with interrupts disabled to remove them from global interrupt queue. BUG: sleeping function called from invalid context at arch/powerpc/kernel/rtas.c:463 in_atomic():1, irqs_disabled():1 Call Trace: [C00000000FFFB970] [C000000000010234] .show_stack+0x68/0x1b0 (unreliable) [C00000000FFFBA10] [C000000000059354] .__might_sleep+0xd8/0xf4 [C00000000FFFBA90] [C00000000001D1BC] .rtas_busy_delay+0x20/0x5c [C00000000FFFBB20] [C00000000001D8A8] .rtas_set_indicator+0x6c/0xcc [C00000000FFFBBC0] [C000000000048BF4] .xics_teardown_cpu+0x118/0x134 [C00000000FFFBC40] [C00000000004539C] .pseries_kexec_cpu_down_xics+0x74/0x8c [C00000000FFFBCC0] [C00000000002DF08] .crash_ipi_callback+0x15c/0x188 [C00000000FFFBD50] [C0000000000296EC] .smp_message_recv+0x84/0xdc [C00000000FFFBDC0] [C000000000048E08] .xics_ipi_dispatch+0xf0/0x130 [C00000000FFFBE50] [C00000000009EF10] .handle_IRQ_event+0x7c/0xf8 [C00000000FFFBF00] [C0000000000A0A14] .handle_percpu_irq+0x90/0x10c [C00000000FFFBF90] [C00000000002659C] .call_handle_irq+0x1c/0x2c [C00000000058B9C0] [C00000000000CA10] .do_IRQ+0xf4/0x1a4 [C00000000058BA50] [C0000000000044EC] hardware_interrupt_entry+0xc/0x10 --- Exception: 501 at .plpar_hcall_norets+0x14/0x1c LR = .pseries_dedicated_idle_sleep+0x190/0x1d4 [C00000000058BD40] [C00000000058BDE0] 0xc00000000058bde0 (unreliable) [C00000000058BDF0] [C00000000001270C] .cpu_idle+0x10c/0x1e0 [C00000000058BE70] [C000000000009274] .rest_init+0x44/0x5c To fix this issue, rtas_set_indicator_fast() is added so that will not wait for RTAS 'busy' delay and this new function is used for kdump (in xics_teardown_cpu()) and for CPU hotplug ( xics_migrate_irqs_away() and xics_setup_cpu()). Note that the platform architecture spec says that set-indicator on the indicator we're using here is not permitted to return the busy or extended busy status codes. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge branch 'merge' of ↵Linus Torvalds2006-07-31
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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] Minor comment fix for misc_64.S [POWERPC] Use H_CEDE on non-SMT [POWERPC] force 64bit mode in fwnmi handlers to workaround firmware bugs [POWERPC] PMAC_APM_EMU should depend on ADB_PMU [POWERPC] Fix new interrupt code (MPIC detection) [POWERPC] Fix new interrupt code (MPIC endianness) [POWERPC] Add cpufreq support for Xserve G5 [POWERPC] Xserve G5 thermal control fixes [POWERPC] Fix mem= handling when the memory limit is > RMO size [POWERPC] More offb/bootx fixes [POWERPC] Fix legacy_serial.c error handling on 32 bits [POWERPC] Fix default clock for udbg_16550 [POWERPC] Fix non-MPIC CHRPs with CONFIG_SMP set [POWERPC] Fix 32 bits warning in prom_init.c [POWERPC] Workaround Pegasos incorrect ISA "ranges" [POWERPC] fix up front-LED Kconfig
| * [POWERPC] Minor comment fix for misc_64.SGeoff Levand2006-07-31
| | | | | | | | | | | | | | A minor comment fix for misc_64.S from Takao Shinohara. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] force 64bit mode in fwnmi handlers to workaround firmware bugsOlaf Hering2006-07-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The firmware of POWER4 and JS20 systems does not switch the cpu to 64bit mode when the registered system_reset and machine_check handlers get called. If a 32bit process runs on that cpu at the time of the event, the cpu remains in 32bit mode. xmon and kdump can not deal with it, the result is an error like 'Bad kernel stack pointer fff2aad0 at 3200'. xmon just loses some register info, but booting the kdump kernel usually fails. Both handlers are not hot paths. Duplicate the EXCEPTION_PROLOG_PSERIES macro and add two instructions to switch to 64bit: li r11,5; rldimi r10,r11,61,0; Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix legacy_serial.c error handling on 32 bitsBenjamin Herrenschmidt2006-07-25
| | | | | | | | | | | | | | | | | | | | | | | | | | The code in legacy_serial.c wouldn't properly compare OF translation results against OF_BAD_ADDR as it's using a phys_addr_t which is 32 bits on some 32-bit powerpc platforms. This fixes it by always using a u64 which is what is returned by the OF parsing routines. It also makes translation failure harmless for ISA serial ports. If they can't translate, we can't use the UART early, but we can still let the 8250 driver use it later on by using IO port accessors. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix default clock for udbg_16550Benjamin Herrenschmidt2006-07-25
| | | | | | | | | | | | | | | | This patch makes it possible to provide 0 as the clock value for udbg_16550, making it default to the standard 1.8432Mhz clock Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix non-MPIC CHRPs with CONFIG_SMP setBenjamin Herrenschmidt2006-07-25
| | | | | | | | | | | | | | | | | | | | | | Pseudo-CHRP machines like Pegasos without an MPIC would crash at boot if CONFIG_SMP was set because the "smp_ops" pointer was set to MPIC related ops unconditionally. This patch makes it NULL on machines that don't support SMP and provides proper default behaviour in the callers when smp_ops is NULL. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix 32 bits warning in prom_init.cBenjamin Herrenschmidt2006-07-25
| | | | | | | | | | | | | | A warning is hurting my eyes when building 32 bits kernels Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Workaround Pegasos incorrect ISA "ranges"Benjamin Herrenschmidt2006-07-25
| | | | | | | | | | | | | | | | | | | | The Pegasos firmware doesn't create a valid "ranges" property for the ISA bridge, thus causing translation of ISA addresses and IO ports to fail. This fixes it, thus re-enabling proper early serial console to work on Pegasos. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] vDSO hash-style fixRoland McGrath2006-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The latest toolchains can produce a new ELF section in DSOs and dynamically-linked executables. The new section ".gnu.hash" replaces ".hash", and allows for more efficient runtime symbol lookups by the dynamic linker. The new ld option --hash-style={sysv|gnu|both} controls whether to produce the old ".hash", the new ".gnu.hash", or both. In some new systems such as Fedora Core 6, gcc by default passes --hash-style=gnu to the linker, so that a standard invocation of "gcc -shared" results in producing a DSO with only ".gnu.hash". The new ".gnu.hash" sections need to be dealt with the same way as ".hash" sections in all respects; only the dynamic linker cares about their contents. To work with older dynamic linkers (i.e. preexisting releases of glibc), a binary must have the old ".hash" section. The --hash-style=both option produces binaries that a new dynamic linker can use more efficiently, but an old dynamic linker can still handle. The new section runs afoul of the custom linker scripts used to build vDSO images for the kernel. On ia64, the failure mode for this is a boot-time panic because the vDSO's PT_IA_64_UNWIND segment winds up ill-formed. This patch addresses the problem in two ways. First, it mentions ".gnu.hash" in all the linker scripts alongside ".hash". This produces correct vDSO images with --hash-style=sysv (or old tools), with --hash-style=gnu, or with --hash-style=both. Second, it passes the --hash-style=sysv option when building the vDSO images, so that ".gnu.hash" is not actually produced. This is the most conservative choice for compatibility with any old userland. There is some concern that some ancient glibc builds (though not any known old production system) might choke on --hash-style=both binaries. The optimizations provided by the new style of hash section do not really matter for a DSO with a tiny number of symbols, as the vDSO has. If someone wants to use =gnu or =both for their vDSO builds and worry less about that compatibility, just change the option and the linker script changes will make any choice work fine. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Andi Kleen <ak@muc.de> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] cpu hotplug: replace __devinit* with __cpuinit* for cpu notificationsChandra Seetharaman2006-07-31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Few of the callback functions and notifier blocks that are associated with cpu notifications incorrectly have __devinit and __devinitdata. They should be __cpuinit and __cpuinitdata instead. It makes no functional difference but wastes text area when CONFIG_HOTPLUG is enabled and CONFIG_HOTPLUG_CPU is not. This patch fixes all those instances. Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Cc: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] panic_on_oops: remove ssleep()Horms2006-07-31
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is part of an effort to unify the panic_on_oops behaviour across all architectures that implement it. It was pointed out to me by Andi Kleen that if an oops has occured in interrupt context, then calling sleep() in the oops path will only cause a panic, and that it would be really better for it not to be in the path at all. This patch removes the ssleep() call and reworks the console message accordinly. I have a slght concern that the resulting console message is too long, feedback welcome. For powerpc it also unifies the 32bit and 64bit behaviour. Fror x86_64, this patch only updates the console message, as ssleep() is already not present. Signed-off-by: Horms <horms@verge.net.au> Acked-by: Paul Mackerras <paulus@samba.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] powerpc: make OF interrupt tree parsing more strictSegher Boessenkool2006-07-10
| | | | | | | | | | | | This patch fixes a bit of boundchecking in the new Open Firmware interrupt tree parsing code. It's important that it fails when things aren't correct in order to trigger fallback mecanisms that are necessary to make some machines work properly. Signed-off-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] powerpc: fix trigger handling in the new irq codeBenjamin Herrenschmidt2006-07-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch slightly reworks the new irq code to fix a small design error. I removed the passing of the trigger to the map() calls entirely, it was not a good idea to have one call do two different things. It also fixes a couple of corner cases. Mapping a linux virtual irq to a physical irq now does only that. Setting the trigger is a different action which has a different call. The main changes are: - I no longer call host->ops->map() for an already mapped irq, I just return the virtual number that was already mapped. It was called before to give an opportunity to change the trigger, but that was causing issues as that could happen while the interrupt was in use by a device, and because of the trigger change, map would potentially muck around with things in a racy way. That was causing much burden on a given's controller implementation of map() to get it right. This is much simpler now. map() is only called on the initial mapping of an irq, meaning that you know that this irq is _not_ being used. You can initialize the hardware if you want (though you don't have to). - Controllers that can handle different type of triggers (level/edge/etc...) now implement the standard irq_chip->set_type() call as defined by the generic code. That means that you can use the standard set_irq_type() to configure an irq line manually if you wish or (though I don't like that interface), pass explicit trigger flags to request_irq() as defined by the generic kernel interfaces. Also, using those interfaces guarantees that your controller set_type callback is called with the descriptor lock held, thus providing locking against activity on the same interrupt (including mask/unmask/etc...) automatically. A result is that, for example, MPIC's own map() implementation calls irq_set_type(NONE) to configure the hardware to the default triggers. - To allow the above, the irq_map array entry for the new mapped interrupt is now set before map() callback is called for the controller. - The irq_create_of_mapping() (also used by irq_of_parse_and_map()) function for mapping interrupts from the device-tree now also call the separate set_irq_type(), and only does so if there is a change in the trigger type. - While I was at it, I changed pci_read_irq_line() (which is the helper I would expect most archs to use in their pcibios_fixup() to get the PCI interrupt routing from the device tree) to also handle a fallback when the DT mapping fails consisting of reading the PCI_INTERRUPT_PIN to know wether the device has an interrupt at all, and the the PCI_INTERRUPT_LINE to get an interrupt number from the device. That number is then mapped using the default controller, and the trigger is set to level low. That default behaviour works for several platforms that don't have a proper interrupt tree like Pegasos. If it doesn't work for your platform, then either provide a proper interrupt tree from the firmware so that fallback isn't needed, or don't call pci_read_irq_line() - Add back a bit that got dropped by my main rework patch for properly clearing pending IPIs on pSeries when using a kexec Signed-off-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] tty: Remove include of screen_info.h from tty.hJon Smirl2006-07-10
| | | | | | | | | | | | | | | | screen_info.h doesn't have anything to do with the tty layer and shouldn't be included by tty.h. This patches removes the include and modifies all users to directly include screen_info.h. struct screen_info is mainly used to communicate with the console drivers in drivers/video/console. Note that this patch touches every arch and I have no way of testing it. If there is a mistake the worst thing that will happen is a compile error. [akpm@osdl.org: fix arm build] [akpm@osdl.org: fix alpha build] Signed-off-by: Jon Smirl <jonsmir@gmail.com> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds2006-07-03
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: powerpc: add defconfig for Freescale MPC8349E-mITX board powerpc: Add base support for the Freescale MPC8349E-mITX eval board Documentation: correct values in MPC8548E SEC example node [POWERPC] Actually copy over i8259.c to arch/ppc/syslib this time [POWERPC] Add new interrupt mapping core and change platforms to use it [POWERPC] Copy i8259 code back to arch/ppc [POWERPC] New device-tree interrupt parsing code [POWERPC] Use the genirq framework [PATCH] genirq: Allow fasteoi handler to retrigger disabled interrupts [POWERPC] Update the SWIM3 (powermac) floppy driver [POWERPC] Fix error handling in detecting legacy serial ports [POWERPC] Fix booting on Momentum "Apache" board (a Maple derivative) [POWERPC] Fix various offb and BootX-related issues [POWERPC] Add a default config for 32-bit CHRP machines [POWERPC] fix implicit declaration on cell. [POWERPC] change get_property to return void *
| * [POWERPC] Add new interrupt mapping core and change platforms to use itBenjamin Herrenschmidt2006-07-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the new irq remapper core and removes the old one. Because there are some fundamental conflicts with the old code, like the value of NO_IRQ which I'm now setting to 0 (as per discussions with Linus), etc..., this commit also changes the relevant platform and driver code over to use the new remapper (so as not to cause difficulties later in bisecting). This patch removes the old pre-parsing of the open firmware interrupt tree along with all the bogus assumptions it made to try to renumber interrupts according to the platform. This is all to be handled by the new code now. For the pSeries XICS interrupt controller, a single remapper host is created for the whole machine regardless of how many interrupt presentation and source controllers are found, and it's set to match any device node that isn't a 8259. That works fine on pSeries and avoids having to deal with some of the complexities of split source controllers vs. presentation controllers in the pSeries device trees. The powerpc i8259 PIC driver now always requests the legacy interrupt range. It also has the feature of being able to match any device node (including NULL) if passed no device node as an input. That will help porting over platforms with broken device-trees like Pegasos who don't have a proper interrupt tree. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] New device-tree interrupt parsing codeBenjamin Herrenschmidt2006-07-03
| | | | | | | | | | | | | | | | | | Adds new routines to prom_parse to walk the device-tree for interrupt information. This includes both direct mapping of interrupts and low level parsing functions for use with partial trees. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Use the genirq frameworkBenjamin Herrenschmidt2006-07-03
| | | | | | | | | | | | | | | | | | This adapts the generic powerpc interrupt handling code, and all of the platforms except for the embedded 6xx machines, to use the new genirq framework. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix error handling in detecting legacy serial portsBenjamin Herrenschmidt2006-07-03
| | | | | | | | | | | | | | | | Previously we weren't checking for failures in translating device addresses from the firmware. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix booting on Momentum "Apache" board (a Maple derivative)Benjamin Herrenschmidt2006-07-03
| | | | | | | | | | | | | | | | | | This extends the maple device-tree workarounds to work on the Apache board as well, and extends the maple platform probing code to recognize the Apache board. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Fix various offb and BootX-related issuesBenjamin Herrenschmidt2006-07-03
| | | | | | | | | | | | | | | | | | | | This patch fixes various issues with offb (the default fbdev used on powerpc when no proper fbdev is supported). It was broken when using BootX under some circumstances and would fail to properly get the framebuffer base address in others. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] change get_property to return void *Jeremy Kerr2006-07-02
| | | | | | | | | | | | | | | | | | | | | | | | Change the get_property() function to return a void *. This allows us to later remove the cast done in the majority of callers. Built for pseries, iseries, pmac32, cell, cbesim, g5, systemsim, maple, and mpc* defconfigs Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] lockdep: irqtrace subsystem, move account_system_vtime() calls into ↵Paul Mackerras2006-07-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | kernel/softirq.c At the moment, powerpc and s390 have their own versions of do_softirq which include local_bh_disable() and __local_bh_enable() calls. They end up calling __do_softirq (in kernel/softirq.c) which also does local_bh_disable/enable. Apparently the two levels of disable/enable trigger a warning from some validation code that Ingo is working on, and he would like to see the outer level removed. But to do that, we have to move the account_system_vtime calls that are currently in the arch do_softirq() implementations for powerpc and s390 into the generic __do_softirq() (this is a no-op for other archs because account_system_vtime is defined to be an empty inline function on all other archs). This patch does that. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] lockdep: irqtrace subsystem, coreIngo Molnar2006-07-03
|/ | | | | | | | | | | | Accurate hard-IRQ-flags and softirq-flags state tracing. This allows us to attach extra functionality to IRQ flags on/off events (such as trace-on/off). Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-30
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* typo fixes: mecanism -> mechanismAdrian Bunk2006-06-30
| | | | Signed-off-by: Adrian Bunk <bunk@stusta.de>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds2006-06-29
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (43 commits) [POWERPC] Use little-endian bit from firmware ibm,pa-features property [POWERPC] Make sure smp_processor_id works very early in boot [POWERPC] U4 DART improvements [POWERPC] todc: add support for Time-Of-Day-Clock [POWERPC] Make lparcfg.c work when both iseries and pseries are selected [POWERPC] Fix idr locking in init_new_context [POWERPC] mpc7448hpc2 (taiga) board config file [POWERPC] Add tsi108 pci and platform device data register function [POWERPC] Add general support for mpc7448hpc2 (Taiga) platform [POWERPC] Correct the MAX_CONTEXT definition powerpc: minor cleanups for mpc86xx [POWERPC] Make sure we select CONFIG_NEW_LEDS if ADB_PMU_LED is set [POWERPC] Simplify the code defining the 64-bit CPU features [POWERPC] powerpc: kconfig warning fix [POWERPC] Consolidate some of kernel/misc*.S [POWERPC] Remove unused function call_with_mmu_off [POWERPC] update asm-powerpc/time.h [POWERPC] Clean up it_lp_queue.h [POWERPC] Skip the "copy down" of the kernel if it is already at zero. [POWERPC] Add the use of the firmware soft-reset-nmi to kdump. ...
| * [POWERPC] Use little-endian bit from firmware ibm,pa-features propertyPaul Mackerras2006-06-29
| | | | | | | | Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Make sure smp_processor_id works very early in bootMichael Ellerman2006-06-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's a small period early in boot where we don't know which cpu we're running on. That's ok, except that it means we have no paca, or more correctly that our paca pointer points somewhere random. So that we can safely call things like smp_processor_id(), we need a paca, so just assume we're on cpu 0. No code should _write_ to the paca before we've set the correct one up. We setup the proper paca after we've scanned the flat device tree in early_setup(), so there's no need to do it again in start_here_common. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Make lparcfg.c work when both iseries and pseries are selectedStephen Rothwell2006-06-29
| | | | | | | | | | | | | | | | This also consolidates the initial bits of lparcfg_data() and adds the partition number to the iSeries flattened device tree. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * [POWERPC] Add general support for mpc7448hpc2 (Taiga) platformZang Roy-r619112006-06-29
| | | | | | | | | | | | | | Add support for Freescale mpc7448 (Taiga) board support Signed-off-by: Roy Zang <tie-fei.zang@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * Merge branch 'for_paulus' of ↵Paul Mackerras2006-06-28
| |\ | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc
| | * powerpc: minor cleanups for mpc86xxKumar Gala2006-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Remove duplicated cputable entry for 8641 (matches w/7448) * Removed __init from function prototypes in mpc86xx.h * Moved pci fixups into board specific code * Moved mpc86xx_exclude_device to generic mpc86xx pci code * Fixed sparse warnings in mpc86xx_smp.c * Removed board specific header include from asm-powerpc/mpc86xx.h Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * | [POWERPC] Consolidate some of kernel/misc*.SStephen Rothwell2006-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There were some common functions (mainly i/o). Also some small white space cleanups and remove a couple of small unused functions. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Remove unused function call_with_mmu_offStephen Rothwell2006-06-28
| | | | | | | | | | | | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Clean up it_lp_queue.hStephen Rothwell2006-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | No more StudlyCaps. Remove from a couple of places it is no longer needed. Use C style comments. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Skip the "copy down" of the kernel if it is already at zero.Jimi Xenidis2006-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch allows the kernel to recognized that it was loaded at zero and the copy down of the image is unnecessary. This is useful for Simulators and kexec models. On a typical 3.8 MiB vmlinux.strip this saves about 2.3 million instructions. Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Add the use of the firmware soft-reset-nmi to kdump.David Wilder2006-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With this patch, kdump uses the firmware soft-reset NMI for two purposes: 1) Initiate the kdump (take a crash dump) by issuing a soft-reset. 2) Break a CPU out of a deadlock condition that is detected during kdump processing. When a soft-reset is initiated each CPU will enter system_reset_exception() and set its corresponding bit in the global bit-array cpus_in_sr then call die(). When die() finds the CPU's bit set in cpu_in_sr crash_kexec() is called to initiate a crash dump. The first CPU to enter crash_kexec() is called the "crashing CPU". All other CPUs are "secondary CPUs". The secondary CPU's pass through to crash_kexec_secondary() and sleep. The crashing CPU waits for all CPUs to enter via soft-reset then boots the kdump kernel (see crash_soft_reset_check()) When the system crashes due to a panic or exception, crash_kexec() is called by panic() or die(). The crashing CPU sends an IPI to all other CPUs to notify them of the pending shutdown. If a CPU is in a deadlock or hung state with interrupts disabled, the IPI will not be delivered. The result being, that the kdump kernel is not booted. This problem is solved with the use of a firmware generated soft-reset. After the crashing_cpu has issued the IPI, it waits for 10 sec for all CPUs to enter crash_ipi_callback(). A CPU signifies its entry to crash_ipi_callback() by setting its corresponding bit in the cpus_in_crash bit array. After 10 sec, if one or more CPUs have not set their bit in cpus_in_crash we assume that the CPU(s) is deadlocked. The operator is then prompted to generate a soft-reset to break the deadlock. Each CPU enters the soft reset handler as described above. Two conditions must be handled at this point: 1) The system crashed because the operator generated a soft-reset. See 2) The system had crashed before the soft-reset was generated ( in the case of a Panic or oops). The first CPU to enter crash_kexec() uses the state of the kexec_lock to determine this state. If kexec_lock is already held then condition 2 is true and crash_kexec_secondary() is called, else; this CPU is flagged as the crashing CPU, the kexec_lock is acquired and crash_kexec() proceeds as described above. Each additional CPUs responding to the soft-reset will pass through crash_kexec() to kexec_secondary(). All secondary CPUs call crash_ipi_callback() readying them self's for the shutdown. When ready they clear their bit in cpus_in_sr. The crashing CPU waits in kexec_secondary() until all other CPUs have cleared their bits in cpus_in_sr. The kexec kernel boot is then started. Signed-off-by: Haren Myneni <haren@us.ibm.com> Signed-off-by: David Wilder <dwilder@us.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Add udbg support for RTAS consoleMichael Ellerman2006-06-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | Add udbg hooks for the RTAS console, based on the RTAS put-term-char and get-term-char calls. Along with my previous patches, this should enable debugging as soon as early_init_dt_scan_rtas() is called. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Setup RTAS values earlier, to enable rtas_call() earlierMichael Ellerman2006-06-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Althought RTAS is instantiated when we enter the kernel, we can't actually call into it until we know its entry point address. Currently we grab that in rtas_initialize(), however that's quite late in the boot sequence. To enable rtas_call() earlier, we can grab the RTAS entry etc. values while we're scanning the flattened device tree. There's existing code to retrieve the values from /chosen, however we don't store them there anymore, so remove that code. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Move RTAS exports next to their declarationsMichael Ellerman2006-06-27
| | | | | | | | | | | | | | | | | | | | | Move RTAS exports next to their declarations. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Make rtas_call() safe if RTAS hasn't been initialisedMichael Ellerman2006-06-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently it's unsafe to call rtas_call() prior to rtas_initialize(). This is because the rtas.entry value hasn't been setup and so we don't know where to enter, but we just try anyway. We can't do anything intelligent without rtas.entry, so if it's not set, just return. Code that calls rtas_call() early needs to be aware that the call might fail. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Setup the boot cpu's paca pointer in C rather than asmMichael Ellerman2006-06-27
| | | | | | | | | | | | | | | | | | | | | | | | There's no need to set the boot cpu paca in asm, so do it in C so us mere mortals can understand it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] Make kexec_setup() a regular initcallMichael Ellerman2006-06-27
| | | | | | | | | | | | | | | | | | | | | | | | There's no reason kexec_setup() needs to be called explicitly from setup_system(), it can just be a regular initcall. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
| * | [POWERPC] powerpc: Initialise ppc_md htab pointers earlierMichael Ellerman2006-06-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Initialise the ppc_md htab callbacks earlier, in the probe routines. This allows us to call htab_finish_init() from htab_initialize(), and makes it private to hash_utils_64.c. Move htab_finish_init() and make_bl() above htab_initialize() to avoid forward declarations. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 21:01:11 -0500