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2007-12-06[POWERPC] Fix swapper_pg_dir size when CONFIG_PTE_64BIT=y on FSL_BOOKEKumar Gala
The size of swapper_pg_dir is 8k instead of 4k when using 64-bit PTEs (CONFIG_PTE_64BIT). This was reported by Cedric Hombourger <chombourger@gmail.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-12-03Revert "[POWERPC] Fix RTAS os-term usage on kernel panic"Paul Mackerras
This reverts commit a2b51812a4dc5db09ab4d4638d4d8ed456e2457e. It turns out that this change caused some machines to fail to come back up when being rebooted, and generated an error in the hypervisor error log on some machines. The platform architecture (PAPR) is a little unclear on exactly when the RTAS ibm,os-term function should be called. Until that is clarified I'm reverting this commit. Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-29Fix boot problem with iSeries lacking hugepage supportMel Gorman
Ordinarily the size of a pageblock is determined at compile-time based on the hugepage size. On PPC64, the hugepage size is determined at runtime based on what is supported by the machine. With legacy machines such as iSeries that do not support hugepages, HPAGE_SHIFT is 0. This results in pageblock_order being set to -PAGE_SHIFT and a crash results shortly afterwards. This patch adds a function to select a sensible value for pageblock order by default when HUGETLB_PAGE_SIZE_VARIABLE is set. It checks that HPAGE_SHIFT is a sensible value before using the hugepage size; if it is not MAX_ORDER-1 is used. This is a fix for 2.6.24. Credit goes to Stephen Rothwell for identifying the bug and testing candidate patches. Additional credit goes to Andy Whitcroft for spotting a problem with respects to IA-64 before releasing. Additional credit to David Gibson for testing with the libhugetlbfs test suite. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Tested-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-11-20[POWERPC] 83xx: Update mpc8349emitx(gp) defconfig for USBGrant Likely
USB support for the 8349itx got added a while back; but the defconfig never got updated. This patch adds the appropriate USB config options to the defconfigs Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Scott Wood <scottwood@freescale.com> CC: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-20[POWERPC] 83xx: Update mpc832x_rdb_defconfig to enable MMC-over-SPIAnton Vorontsov
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-20[POWERPC] 83xx: MPC832x RDB - remove spidev stub, use mmc_spiAnton Vorontsov
mmc_spi has hit the mainline, so we can start using it. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-20[POWERPC] 8xxx: MDS board RTC fixesKim Phillips
Now the rtc class ds1374 driver has been added, remove the old rtc driver hookup code, add rtc node to device trees, and turn on the new driver in the defconfigs. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-20[POWERPC] Fix 8xx build breakage due to _tlbie changesBenjamin Herrenschmidt
My changes to _tlbie to fix 4xx unfortunately broke 8xx build in a couple of places. This fixes it. Spotted by Olof Johansson. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Vitaly Bordug <vitb@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-20Merge branch 'for-2.6.24' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into merge
2007-11-19[POWERPC] Fix device tree interrupt map for Freescale ULI1575 boardsKumar Gala
The interrupt map for the PCI PHB that had the ULI1575 was not correct on the boards that have it. * 8544 DS: - Fix interrupt mask - Be explicit about use of INTA for on chip peripherals * 8572 DS/8641 HPCN: - Fix interrupt mask - Expand interrupt map for PCI slots to cover all functions - Be explicit about use of INTA for on chip peripherals Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-20[POWERPC] Fix possible division by zero in scaled time accountingMichael Neuling
If we get no user time and no system time allocated since the last account_system_vtime, the system to user time ratio estimate can end up dividing by zero. This was causing a problem noticed by Balbir Singh. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-20[POWERPC] spufs: Fix context destroy vs /spu readdir raceJeremy Kerr
We can currently cause an oops by repeatedly creating and destroying contexts, while doing getdents() calls on the "/spu" directory. This is due to the context's top-level dentry remaining hashed while the context is being destroyed. Fix this by unhashing the context's dentry with the dentry->d_inode->i_mutex held. This way, we'll hit the check for d_unhashed in dentry_readdir, and won't be included in the list of subdirs for /spu. test: spufs-testsuite:tests/01-spu_create/07-destroy-vs-readdir-race Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-20[POWERPC] Fix RTAS os-term usage on kernel panicLinas Vepstas
The rtas_os_term() routine was being called at the wrong time. The actual rtas call "os-term" will not ever return, and so calling it from the panic notifier is too early. Instead, call it from the machine_reset() call. This splits the rtas_os_term() routine into two: one part to capture the kernel panic message, invoked during the panic notifier, and another part that is invoked during machine_reset(). Prior to this patch, the os-term call was never being made, because panic_timeout was always non-zero. Calling os-term helps keep the hypervisor happy! We have to keep the hypervisor happy to avoid service, dump and error reporting problems. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-19[POWERPC] 83xx: Handle mpc8360 rev. 2.1 RGMII timing erratumKim Phillips
If on a rev. 2.1, adjust UCC clock and data timing characteristics as specified in the rev.2.1 erratum #2. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-19[POWERPC] 83xx: Fix 2nd UCC entry in mpc832x_mds.dtsKim Phillips
correct the reg property, remove duplicate io port entry, whitespace fixes. Thanks to Peter Van Ackeren for pointing this out. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-19[POWERPC] 83xx: mpc832x mds: Fix board PHY reset codeKim Phillips
currently the board-level PHY reset code for the mpc832x MDS messes with reset configuration words source settings which is plain wrong (it looks like this board code was cut-n-pasted from the mpc8360 mds code, which has the PHY reset bits in a different BCSR); this patch points the PHY reset code to the proper mpc832x mds PHY reset bits in the BCSR. Signed-off-by: Peter Van Ackeren <peter.vanackeren@freescale.com> Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-19[POWERPC] Fix potential NULL dereferenceCyrill Gorcunov
This patch does fix potential NULL pointer dereference that could take place inside of strcmp() if of_get_property() call failed. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-20[POWERPC] vdso: Fixes for cache block sizesOlof Johansson
The current VDSO implementation is hardcoded to 128 byte cache blocks, which are only used on IBM's 64-bit processors. Convert it to get the cache block sizes out of vdso_data instead, similar to how the ppc64 in-kernel cache flush does it. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-20Merge branch 'for-2.6.24' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/olof/pasemi into merge
2007-11-19[POWERPC] pasemi: Don't reset mpic at bootOlof Johansson
Due to an erratum, we don't want to reset the mpic at boot time. It can sometimes cause problems with lost interrupts later on while running. Signed-off-by: Olof Johansson <olof@lixom.net>
2007-11-20Merge branch 'for-2.6.24' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge
2007-11-20[POWERPC] Fix build failure on legacy iSeriesKamalesh Babulal
Include <asm/iseries/hv_call.h> in arch/powerpc/mm/stab.c to fix the following compile error (found with randconfig): CC arch/powerpc/mm/stab.o arch/powerpc/mm/stab.c: In function "stab_initialize": arch/powerpc/mm/stab.c:282: error: implicit declaration of function "HvCall1" arch/powerpc/mm/stab.c:282: error: "HvCallBaseSetASR" undeclared (first use in this function) arch/powerpc/mm/stab.c:282: error: (Each undeclared identifier is reported only once arch/powerpc/mm/stab.c:282: error: for each function it appears in.) make[1]: *** [arch/powerpc/mm/stab.o] Error 1 make: *** [arch/powerpc/mm] Error 2 Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-19[POWERPC] 4xx: UIC add mask_ack callbackValentine Barshak
This adds uic_mask_ack_irq() callback to PowerPC 4xx uic code to avoid kernel crash. It is used for edge-triggered interrupts by handle_uic_irq(). Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-11-19[POWERPC] 4xx: Replace #includes of asm/of_platform.h with linux/of_platform.h.Jon Loeliger
Signed-off-by: Jon Loeliger <jdl@freescale.com> Acked-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2007-11-19[POWERPC] prpmc2800: Enable L2 cacheMark A. Greer
Turn on the L2 cache on the prpmc2800 platform. Signed-off-by: Mark A. Greer <mgreer@mvista.com Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-19[POWERPC] pSeries: make pseries_defconfig minus PCI build againStephen Rothwell
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-19[POWERPC] Fix multiple bugs in rtas_ibm_suspend_me codeNathan Lynch
There are several issues with the rtas_ibm_suspend_me code, which enables platform-assisted suspension of an LPAR as covered in PAPR 2.2. 1.) rtas_ibm_suspend_me uses on_each_cpu() to invoke rtas_percpu_suspend_me on all cpus via IPI: if (on_each_cpu(rtas_percpu_suspend_me, &data, 1, 0)) ... 'data' is on the calling task's stack, but rtas_ibm_suspend_me takes no measures to ensure that all instances of rtas_percpu_suspend_me are finished accessing 'data' before returning. This can result in the IPI'd cpus accessing random stack data and getting stuck in H_JOIN. This is addressed by using an atomic count of workers and a completion on the stack. 2.) rtas_percpu_suspend_me is needlessly calling H_JOIN in a loop. The only event that can cause a cpu to return from H_JOIN is an H_PROD from another cpu or a NMI/system reset. Each cpu need call H_JOIN only once per suspend operation. Remove the loop and the now unnecessary 'waiting' state variable. 3.) H_JOIN must be called with MSR[EE] off, but lazy interrupt disabling may cause the caller of rtas_ibm_suspend_me to call H_JOIN with it on; the local_irq_disable() in on_each_cpu() is not sufficient. Fix this by explicitly saving the MSR and clearing the EE bit before calling H_JOIN. 4.) H_PROD is being called with the Linux logical cpu number as the parameter, not the platform interrupt server value. (It's also being called for all possible cpus, which is harmless, but unnecessary.) This is fixed by calling H_PROD for each online cpu using get_hard_smp_processor_id(cpu) for the argument. Signed-off-by: Nathan Lynch <ntl@pobox.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-13[POWERPC] Silence an annoying boot messageStephen Rothwell
vmemmap_populate will printk (with KERN_WARNING) for a lot of pages if CONFIG_SPARSEMEM_VMEMMAP is enabled (at least it does on iSeries). Use pr_debug for it instead. Replace the only other use of DBG in this file with pr_debug as well. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-13[POWERPC] Fix early btext debug on PowerMacBenjamin Herrenschmidt
The early btext debug wouldn't work on PowerMac when booted from BootX due to the code looking for the wrong property name. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-13[POWERPC] Demote clockevent printk to KERN_DEBUGTony Breeds
These don't need to be seen by everyone on every boot. Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-13[POWERPC] Fix CONFIG_SMP=n build error on ppc64Olof Johansson
The patch "KVM: fix !SMP build error" change the way smp_call_function() actually uses the passed in function names on non-SMP builds. So previously it was never caught that the function passed in was never actually defined. This causes a build error on ppc64_defconfig + CONFIG_SMP=n: arch/powerpc/mm/tlb_64.c: In function 'pgtable_free_now': arch/powerpc/mm/tlb_64.c:71: error: 'pte_free_smp_sync' undeclared (first use in this function) arch/powerpc/mm/tlb_64.c:71: error: (Each undeclared identifier is reported only once arch/powerpc/mm/tlb_64.c:71: error: for each function it appears in.) So we need to define it even if CONFIG_SMP is off. Either that or ifdef out the smp_call_function() call, but that's ugly. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-13[POWERPC] Avoid unpaired stwcx. on some processorsBecky Bruce
The context switch code in the kernel issues a dummy stwcx. to clear the reservation, as recommended by the architecture. However, some processors can have issues if this stwcx to address A occurs while the reservation is already held to a different address B. To avoid this problem, the dummy stwcx. needs to be paired with a dummy lwarx to the same address. This adds the dummy lwarx, and creates a cpu feature bit to indicate which cpus are affected. Tested on mpc8641_hpcn_defconfig in arch/powerpc; build tested in arch/ppc. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-13Merge branch 'for-2.6.24' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into merge
2007-11-09Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-schedLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched: sched: proper prototype for kernel/sched.c:migration_init() sched: avoid large irq-latencies in smp-balancing sched: fix copy_namespace() <-> sched_fork() dependency in do_fork sched: clean up the wakeup preempt check, #2 sched: clean up the wakeup preempt check sched: wakeup preemption fix sched: remove PREEMPT_RESTRICT sched: turn off PREEMPT_RESTRICT KVM: fix !SMP build error x86: make nmi_cpu_busy() always defined x86: make ipi_handler() always defined sched: cleanup, use NSEC_PER_MSEC and NSEC_PER_SEC sched: reintroduce SMP tunings again sched: restore deterministic CPU accounting on powerpc sched: fix delay accounting regression sched: reintroduce the sched_min_granularity tunable sched: documentation: place_entity() comments sched: fix vslice
2007-11-09sched: restore deterministic CPU accounting on powerpcPaul Mackerras
Since powerpc started using CONFIG_GENERIC_CLOCKEVENTS, the deterministic CPU accounting (CONFIG_VIRT_CPU_ACCOUNTING) has been broken on powerpc, because we end up counting user time twice: once in timer_interrupt() and once in update_process_times(). This fixes the problem by pulling the code in update_process_times that updates utime and stime into a separate function called account_process_tick. If CONFIG_VIRT_CPU_ACCOUNTING is not defined, there is a version of account_process_tick in kernel/timer.c that simply accounts a whole tick to either utime or stime as before. If CONFIG_VIRT_CPU_ACCOUNTING is defined, then arch code gets to implement account_process_tick. This also lets us simplify the s390 code a bit; it means that the s390 timer interrupt can now call update_process_times even when CONFIG_VIRT_CPU_ACCOUNTING is turned on, and can just implement a suitable account_process_tick(). account_process_tick() now takes the task_struct * as an argument. Tested both with and without CONFIG_VIRT_CPU_ACCOUNTING. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-11-09[POWERPC] cpm: Fix a couple minor issues in cpm_common.c.Scott Wood
A debugging printk is removed, and a comment is fixed to match the code. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-09[POWERPC] Add -mno-spe for ARCH=powerpc buildsKumar Gala
Newer GCC's are capable of autovectorization for ISA extensions like AltiVec and SPE. If we happen to build with one of those compilers we will get SPE instructions in random kernel code. Today we only allow basic interger code in the kernel and FP, AltiVec, or SPE in special explicit locations that have handled the proper saving and restoring of the register state (since on uniprocessor we lazy context switch the register state for FP, AltiVec, and SPE). -mno-spe disables the compiler for automatically generating SPE instructions without our knowledge. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2007-11-08Merge branch 'for-2.6.24' of ↵Paul Mackerras
master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge
2007-11-08[POWERPC] EEH: Make sure warning message is printedLinas Vepstas
Fix old buglet; a warning message should have been printed when a hardware reset takes too long. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] Make altivec code in swsusp_32.S depend on CONFIG_ALTIVECJohannes Berg
This makes the altivec code in swsusp_32.S depend on CONFIG_ALTIVEC to avoid build failures for systems that don't have altivec. I'm not sure whether the code will actually work for other systems, but it was merged for just ppc32 rather than powermac a very long time ago. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] Fix si_addr value on low level hash failuresBenjamin Herrenschmidt
If the low level MMU hash table insertion returns an error (which can happen in some rare circumstances when the hypervisor refuses the insertion of a PTE, typically if you try to access junk via /dev/mem), the generated signal had an incorrect si_addr value due to a bug in the assembly, which was loading it as a 32 bits quantity instead of a 64 bits quantity. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] Refresh ppc64_defconfig and enable pasemi-related optionsOlof Johansson
Refresh ppc64_defconfig, add PPC_PASEMI and various options that the common boards there need: * Chip drivers (iommu, ethernet, IDE, CF, EDAC, MDIO/PHY) * PCMCIA * PATA_PCMCIA * RTC_CLASS * SATA_MV * SATA_SIL24 * IP_PNP + NFS_ROOT for diskless booting + possibly some other things I might have missed to list Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] pasemi: Update defconfigOlof Johansson
Update pasemi_defconfig. Add a few missing options for default devices on electra boards, enable tickless and hrtimers, etc, etc. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] iSeries: Fix ref counting in vio setupStephen Rothwell
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] ] Fix memset size errorLi Zefan
The size passing to memset is wrong. Signed-off-by Li Zefan <lizf@cn.fujitsu.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] Fix link errors for allyesconfigStephen Rothwell
An allyesconfig build creates a .text section that is so big that the .text.init.refok and .fixup sections are too far away for the relocations to be fixed up correctly. This patch fixes that by linking all the relevent text sections for each file together. Suggested by Paul Mackerras. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] iSeries_init_IRQ non-PCI tidyStephen Rothwell
ppc_md.init_IRQ is not called if it is NULL, so we don't need an empty routine in the non PCI case. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] EEH: Avoid crash on null deviceLinas Vepstas
Bugfix: avoid crash if there's no PCI device for a given openfirmware node. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] EEH: Drivers that need reset trump othersLinas Vepstas
Bugfix: if a driver controlling one part of a multi-function PCI card has asked for a reset, honor that request above all others. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-11-08[POWERPC] EEH: Clean up commentsLinas Vepstas
Clean up commentary, remove dead code. Signed-off-by Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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