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* powerpc/signal32: Fix sigset_t conversion when copying to userWill Deacon2011-11-171-1/+1
| | | | | | | | | | | | On PPC64, put_sigset_t converts a sigset_t to a compat_sigset_t before copying it to userspace. There is a typo in the case that we have 4 words to copy, meaning that we corrupt the compat_sigset_t. It appears that _NSIG_WORDS can't be greater than 2 at the moment so this code is probably always optimised away anyway. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/book3e-64: Fix debug support for userspaceKumar Gala2011-11-171-22/+0
| | | | | | | | | | | | | | | | | | | With the introduction of CONFIG_PPC_ADV_DEBUG_REGS user space debug is broken on Book-E 64-bit parts that support delayed debug events. When switch_booke_debug_regs() sets DBCR0 we'll start getting debug events as MSR_DE is also set and we aren't able to handle debug events from kernel space. We can remove the hack that always enables MSR_DE and loads up DBCR0 and just utilize switch_booke_debug_regs() to get user space debug working again. We still need to handle critical/debug exception stacks & proper save/restore of state for those exception levles to support debug events from kernel space like we have on 32-bit. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Remove extraneous CONFIG_PPC_ADV_DEBUG_REGS defineKumar Gala2011-11-171-2/+0
| | | | | | | | All of DebugException is already protected by CONFIG_PPC_ADV_DEBUG_REGS there is no need to have another such ifdef inside the function. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Revert show_regs() define for readabilityKumar Gala2011-11-171-1/+1
| | | | | | | | | | | | | | | We had an existing ifdef for 4xx & BOOKE processors that got changed to CONFIG_PPC_ADV_DEBUG_REGS. The define has nothing to do with CONFIG_PPC_ADV_DEBUG_REGS. The define really should be: #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE) and not #ifdef CONFIG_PPC_ADV_DEBUG_REGS Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/trace: Add a dummy stack frame for trace_hardirqs_offKevin Hao2011-11-161-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The trace_hardirqs_off will use CALLER_ADDR0 and CALLER_ADDR1. If an exception occurs in user mode, there is only one stack frame on the stack and accessing the CALLER_ADDR1 will causes the following call trace. So we create a dummy stack frame to make trace_hardirqs_off happy. WARNING: at kernel/smp.c:459 Modules linked in: NIP: c0093280 LR: c00930a0 CTR: c0010780 REGS: edb87ae0 TRAP: 0700 Not tainted (3.1.0) MSR: 00021002 <ME,CE> CR: 28002888 XER: 00000000 TASK = edce2ac0[17658] 'mthread-lock-on' THREAD: edb86000 CPU: 5 GPR00: 00000001 edb87b90 edce2ac0 00000005 c0019594 edb87bd8 00000001 00000fe3 GPR08: 00041000 c084138c 4e20120d edb87b90 48002888 1001aa7c 00000000 00000000 GPR16: 48830000 10012a8c 00000000 10000af4 00000001 c0810000 00000000 00000000 GPR24: ee9aa920 c0816a18 00000000 00000005 c0019594 edb87bd8 ee20178c edb87b90 NIP [c0093280] smp_call_function_many+0x214/0x2b4 LR [c00930a0] smp_call_function_many+0x34/0x2b4 Call Trace: [edb87b90] [c00930a0] smp_call_function_many+0x34/0x2b4 (unreliable) [edb87bd0] [c00194ec] __flush_tlb_page+0xac/0x100 [edb87c00] [c001957c] flush_tlb_page+0x3c/0x54 [edb87c10] [c00180ac] ptep_set_access_flags+0x74/0x12c [edb87c40] [c0128068] handle_pte_fault+0x2f0/0x9ac [edb87cb0] [c0128c3c] handle_mm_fault+0x104/0x1dc [edb87ce0] [c05f40f4] do_page_fault+0x2dc/0x630 [edb87e50] [c001078c] handle_page_fault+0xc/0x80 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Copy down exception vectors after feature fixupsAnton Blanchard2011-11-163-1/+3
| | | | | | | | | | | | | | kdump fails because we try to execute an HV only instruction. Feature fixups are being applied after we copy the exception vectors down to 0 so they miss out on any updates. We have always had this issue but it only became critical in v3.0 when we added CFAR support (breaks POWER5) and v3.1 when we added POWERNV (breaks everyone). Signed-off-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> [v3.0+] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: panic if we can't instantiate RTASAnton Blanchard2011-11-161-4/+2
| | | | | | | | | | | | | | I had to debug a strange situation where all manner of things were failing. SMT threads, storage and network were all completely broken. The root cause was we couldn't find enough memory to instantiate RTAS - this was a network install so the initrd was huge. Instead of limping along and failing in mysterious ways we should just panic up front if RTAS exists and we can't allocate space for it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/4xx: Fix typos in kexec config dependenciesSuzuki Poulose2011-11-161-1/+1
| | | | | | | | | | | | | Kexec is not supported on 47x. 47x is a variant of 44x with slightly different MMU and SMP support. There was a typo in the config dependency for kexec. This patch fixes the same. Signed-off-by: Suzuki K. Poulose <suzuki@in.ibm.com> Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Josh Boyer <jwboyer@gmail.com> Cc: linux ppc dev <linuxppc-dev@lists.ozlabs.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Fix build breakage in jump_label.cAl Viro2011-11-161-0/+2
| | | | | | | | Should do what other architectures do and wrap all that code into the appropriate ifdef Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/kvm: Fix build failure with HV KVM and CBEAlexander Graf2011-11-081-3/+3
| | | | | | | | | | | | | | | | | | When running with HV KVM and CBE config options enabled, I get build failures like the following: arch/powerpc/kernel/head_64.o: In function `cbe_system_error_hv': (.text+0x1228): undefined reference to `do_kvm_0x1202' arch/powerpc/kernel/head_64.o: In function `cbe_maintenance_hv': (.text+0x1628): undefined reference to `do_kvm_0x1602' arch/powerpc/kernel/head_64.o: In function `cbe_thermal_hv': (.text+0x1828): undefined reference to `do_kvm_0x1802' This is because we jump to a KVM handler when HV is enabled, but we only generate the handler with PR KVM mode. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/irq: Remove IRQF_DISABLEDYong Zhang2011-11-081-1/+1
| | | | | | | | | | | | | | | Since commit [e58aa3d2: genirq: Run irq handlers with interrupts disabled], We run all interrupt handlers with interrupts disabled and we even check and yell when an interrupt handler returns with interrupts enabled (see commit [b738a50a: genirq: Warn when handler enables interrupts]). So now this flag is a NOOP and can be removed. Signed-off-by: Yong Zhang <yong.zhang0@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Geoff Levand <geoff@infradead.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge branch 'modsplit-Oct31_2011' of ↵Linus Torvalds2011-11-0641-29/+38
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux * 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux: (230 commits) Revert "tracing: Include module.h in define_trace.h" irq: don't put module.h into irq.h for tracking irqgen modules. bluetooth: macroize two small inlines to avoid module.h ip_vs.h: fix implicit use of module_get/module_put from module.h nf_conntrack.h: fix up fallout from implicit moduleparam.h presence include: replace linux/module.h with "struct module" wherever possible include: convert various register fcns to macros to avoid include chaining crypto.h: remove unused crypto_tfm_alg_modname() inline uwb.h: fix implicit use of asm/page.h for PAGE_SIZE pm_runtime.h: explicitly requires notifier.h linux/dmaengine.h: fix implicit use of bitmap.h and asm/page.h miscdevice.h: fix up implicit use of lists and types stop_machine.h: fix implicit use of smp.h for smp_processor_id of: fix implicit use of errno.h in include/linux/of.h of_platform.h: delete needless include <linux/module.h> acpi: remove module.h include from platform/aclinux.h miscdevice.h: delete unnecessary inclusion of module.h device_cgroup.h: delete needless include <linux/module.h> net: sch_generic remove redundant use of <linux/module.h> net: inet_timewait_sock doesnt need <linux/module.h> ... Fix up trivial conflicts (other header files, and removal of the ab3550 mfd driver) in - drivers/media/dvb/frontends/dibx000_common.c - drivers/media/video/{mt9m111.c,ov6650.c} - drivers/mfd/ab3550-core.c - include/linux/dmaengine.h
| * powerpc: remove non-required uses of include <linux/module.h>Paul Gortmaker2011-10-316-8/+0
| | | | | | | | | | | | | | | | | | | | | | None of the files touched here are modules, and they are not exporting any symbols either -- so there is no need to be including the module.h. Builds of all the files remains successful. Even kernel/module.c does not need to include it, since it includes linux/moduleloader.h instead. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * powerpc: various straight conversions from module.h --> export.hPaul Gortmaker2011-10-3120-20/+20
| | | | | | | | | | | | | | | | | | All these files were including module.h just for the basic EXPORT_SYMBOL infrastructure. We can shift them off to the export.h header which is a way smaller footprint and thus realize some compile time gains. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * powerpc: fix implicit use of cache.h in kernel/firmware.cPaul Gortmaker2011-10-311-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | This file only needs export.h to get EXPORT_SYMBOL, but in doing so, it uncovers an implicit use of linux/cache.h as follows: CC arch/powerpc/kernel/firmware.o arch/powerpc/kernel/firmware.c:20: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__read_mostly' arch/powerpc/kernel/firmware.c:21: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__used' make[2]: *** [arch/powerpc/kernel/firmware.o] Error 1 Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * powerpc: Fix up implicit sched.h usersPaul Gortmaker2011-10-311-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | They are getting it through device.h --> module.h path, but we want to clean that up. This is a sample of what will happen if we don't: pseries/iommu.c: In function 'tce_build_pSeriesLP': pseries/iommu.c:136: error: implicit declaration of function 'show_stack' pseries/eeh.c: In function 'eeh_token_to_phys': pseries/eeh.c:359: error: 'init_mm' undeclared (first use in this function) pseries/eeh_event.c: In function 'eeh_event_handler': pseries/eeh_event.c:63: error: implicit declaration of function 'daemonize' pseries/eeh_event.c:64: error: implicit declaration of function 'set_current_state' pseries/eeh_event.c:64: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function) pseries/eeh_event.c:64: error: (Each undeclared identifier is reported only once pseries/eeh_event.c:64: error: for each function it appears in.) pseries/eeh_event.c: In function 'eeh_thread_launcher': pseries/eeh_event.c:109: error: 'CLONE_KERNEL' undeclared (first use in this function) hotplug-cpu.c: In function 'pseries_mach_cpu_die': hotplug-cpu.c:115: error: implicit declaration of function 'idle_task_exit' kernel/swsusp_64.c: In function 'do_after_copyback': kernel/swsusp_64.c:17: error: implicit declaration of function 'touch_softlockup_watchdog' cell/spufs/context.c: In function 'alloc_spu_context': cell/spufs/context.c:60: error: implicit declaration of function 'get_task_mm' cell/spufs/context.c:60: warning: assignment makes pointer from integer without a cast cell/spufs/context.c: In function 'spu_forget': cell/spufs/context.c:127: error: implicit declaration of function 'mmput' pasemi/dma_lib.c: In function 'pasemi_dma_stop_chan': pasemi/dma_lib.c:332: error: implicit declaration of function 'cond_resched' sysdev/fsl_lbc.c: In function 'fsl_lbc_ctrl_irq': sysdev/fsl_lbc.c:247: error: 'TASK_NORMAL' undeclared (first use in this function) Add in sched.h so these get the definitions they are looking for. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * powerpc: Fix up implicit stat.h usersPaul Gortmaker2011-10-312-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | They get it via module.h (via device.h) but we want to clean that up. When we do, we'll get things like: ibmebus.c:314: error: 'S_IWUSR' undeclared here (not in a function) vio.c:972: error: 'S_IWUSR' undeclared here (not in a function) so add in the stat header it is using explicitly in advance. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * powerpc: include export.h for files using EXPORT_SYMBOL/THIS_MODULEPaul Gortmaker2011-10-312-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix failures in powerpc associated with the previously allowed implicit module.h presence that now lead to things like this: arch/powerpc/mm/mmu_context_hash32.c:76:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL' arch/powerpc/mm/tlb_hash32.c:48:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL' arch/powerpc/kernel/pci_32.c:51:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL' arch/powerpc/kernel/iomap.c:36:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL' arch/powerpc/platforms/44x/canyonlands.c:126:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL' arch/powerpc/kvm/44x.c:168:59: error: 'THIS_MODULE' undeclared (first use in this function) [with several contibutions from Stephen Rothwell <sfr@canb.auug.org.au>] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * powerpc: add export.h to files making use of EXPORT_SYMBOLPaul Gortmaker2011-10-3110-0/+10
| | | | | | | | | | | | | | | | | | With module.h being implicitly everywhere via device.h, the absence of explicitly including something for EXPORT_SYMBOL went unnoticed. Since we are heading to fix things up and clean module.h from the device.h file, we need to explicitly include these files now. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * powerpc: io-workarounds.c was implicitly getting init_mmPaul Gortmaker2011-10-311-0/+1
| | | | | | | | | | | | | | | | It was coming in via device.h --> module.h etc. but we want to clean that up. So explicitly include the header where init_mm is being declared. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* | Merge branch 'next' of ↵Linus Torvalds2011-11-0631-171/+966
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (106 commits) powerpc/p3060qds: Add support for P3060QDS board powerpc/83xx: Add shutdown request support to MCU handling on MPC8349 MITX powerpc/85xx: Make kexec to interate over online cpus powerpc/fsl_booke: Fix comment in head_fsl_booke.S powerpc/85xx: issue 15 EOI after core reset for FSL CoreNet devices powerpc/8xxx: Fix interrupt handling in MPC8xxx GPIO driver powerpc/85xx: Add 'fsl,pq3-gpio' compatiable for GPIO driver powerpc/86xx: Correct Gianfar support for GE boards powerpc/cpm: Clear muram before it is in use. drivers/virt: add ioctl for 32-bit compat on 64-bit to fsl-hv-manager powerpc/fsl_msi: add support for "msi-address-64" property powerpc/85xx: Setup secondary cores PIR with hard SMP id powerpc/fsl-booke: Fix settlbcam for 64-bit powerpc/85xx: Adding DCSR node to dtsi device trees powerpc/85xx: clean up FPGA device tree nodes for Freecsale QorIQ boards powerpc/85xx: fix PHYS_64BIT selection for P1022DS powerpc/fsl-booke: Fix setup_initial_memory_limit to not blindly map powerpc: respect mem= setting for early memory limit setup powerpc: Update corenet64_smp_defconfig powerpc: Update mpc85xx/corenet 32-bit defconfigs ... Fix up trivial conflicts in: - arch/powerpc/configs/40x/hcu4_defconfig removed stale file, edited elsewhere - arch/powerpc/include/asm/udbg.h, arch/powerpc/kernel/udbg.c: added opal and gelic drivers vs added ePAPR driver - drivers/tty/serial/8250.c moved UPIO_TSI to powerpc vs removed UPIO_DWAPB support
| * powerpc/fsl_booke: Fix comment in head_fsl_booke.SMatthew McClintock2011-11-031-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix typo in comments introduced by: commit 6dece0eb69b2a28e18d104bc5d707f1cb673f5e0 Author: Scott Wood <scottwood@freescale.com> Date: Mon Jul 25 11:29:33 2011 +0000 powerpc/32: Pass device tree address as u64 to machine_init Signed-off-by: Matthew McClintock <msm@freescale.com> cc: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * powerpc: respect mem= setting for early memory limit setupKumar Gala2011-10-111-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | For those MMUs that have some form of bolt'd linear mapping (TLB) required its rare that one ever sets mem= smaller than the size of that mapping. However, on Book-E 64 parts the initial linear mapping is quite large (1G) so its quite reasonable that mem= is set smaller than that. We need to parse the command line for mem= limit and constrain the amount of memory we map initially by it if need be. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * powerpc: e500mc: Fix: use CONFIG_PPC_E500MC in idle_e500.SBharat Bhushan2011-10-111-1/+1
| | | | | | | | | | | | | | It is wrongly using undefined CONFIG_E500MC. Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * powerpc/fsl-booke: Handle L1 D-cache parity error correctly on e500mcKumar Gala2011-10-061-1/+8
| | | | | | | | | | | | | | | | | | If the L1 D-Cache is in write shadow mode the HW will auto-recover the error. However we might still log the error and cause a machine check (if L1CSR0[CPE] - Cache error checking enable). We should only treat the non-write shadow case as non-recoverable. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * powerpc: Don't try OPAL takeover on old 970 bladesBenjamin Herrenschmidt2011-09-291-0/+10
| | | | | | | | | | | | | | | | The firmware on old 970 blades supports some kind of takeover called "TNK takeover" which will crash if we try to probe for OPAL takeover, so don't do it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/perf_event: Fix Power6 L1 cache read & write event codes]Carl E. Love2011-09-291-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current L1 cache read event code 0x80082 only counts for thread 0. The event code 0x280030 should be used to count events on thread 0 and 1. The patch fixes the event code for the L1 cache read. The current L1 cache write event code 0x80086 only counts for thread 0. The event code 0x180032 should be used to count events on thread 0 and 1. The patch fixes the event code for the L1 cache write. FYI, the documentation lists three event codes for the L1 cache read event and three event codes for the L1 cache write event. The event description for the event codes is as follows: L1 cache read requests 0x80082 LSU 0 only L1 cache read requests 0x8008A LSU 1 only L1 cache read requests 0x80030 LSU 1 or LSU 0, counter 2 only. L1 cache store requests 0x80086 LSU 0 only L1 cache store requests 0x8008E LSU 1 only L1 cache store requests 0x80032 LSU 0 or LSU 1, counter 1 only. There can only be one request from either LSU 0 or 1 active at a time. Signed-off-by: Carl Love <cel@us.ibm.com> Acked-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/ptrace: Fix build with gcc 4.6Benjamin Herrenschmidt2011-09-291-4/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gcc (rightfully) complains that we are accessing beyond the end of the fpr array (we do, to access the fpscr). The only sane thing to do (whether anything in that code can be called remotely sane is debatable) is to special case fpscr and handle it as a separate statement. I initially tried to do it it by making the array access conditional to index < PT_FPSCR and using a 3rd else leg but for some reason gcc was unable to understand it and still spewed the warning. So I ended up with something a tad more intricated but it seems to build on 32-bit and on 64-bit with and without VSX. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pci: Don't configure PCIe settings when PCI_PROBE_ONLY is setBenjamin Herrenschmidt2011-09-261-1/+1
| | | | | | | | | | | | | | | | | | | | We don't want to configure PCI Express Max Payload Size or Max Read Request Size on systems that set that flag. The firmware will have done it for us, and under hypervisors such as pHyp we don't even see the parent switches and bridges and thus can make no assumption on what values are safe to use. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Reserve iommu page 0Thadeu Lima de Souza Cascardo2011-09-231-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | Some devices have a dma-window that starts at the address 0. This allows DMA addresses to be mapped to this address and returned to drivers as a valid DMA address. Some drivers may not behave well in this case, since the address 0 is considered an error or not allocated. The solution to avoid this kind of error from happening is reserve the page addressed as 0 so it cannot be allocated for a DMA mapping. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * perf events, powerpc: Add POWER7 stalled-cycles-frontend/backend eventsAnshuman Khandual2011-09-201-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | perf events, powerpc: Add POWER7 stalled-cycles-frontend/backend events Extent the POWER7 PMU driver with definitions for generic front-end and back-end stall events. As explained in Ingo's original comment(8f62242246351b5a4bc0c1f00c0c7003edea128a ), the exact definitions of the stall events are very much processor specific as different things mean different in their respective instruction pipeline. These two Power7 raw events are the closest approximation to the concept detailed in Ingo's comment. [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 0x100f8, /* GCT_NOSLOT_CYC */ It means cycles when the Global Completion Table has no slots from this thread [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = 0x4000a, /* CMPLU_STALL */ It means no groups completed and GCT not empty for this thread Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Machine check and other system interruptsBenjamin Herrenschmidt2011-09-202-4/+33
| | | | | | | | | | | | | | | | | | | | | | | | OPAL can handle various interrupt for us such as Machine Checks (it performs all sorts of recovery tasks and passes back control to us with informations about the error), Hardware Management Interrupts and Softpatch interrupts. This wires up the mechanisms and prints out specific informations returned by HAL when a machine check occurs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Support for OPAL consoleBenjamin Herrenschmidt2011-09-202-1/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds a udbg and an hvc console backend for supporting a console using the OPAL console interfaces. On OPAL v1 we have hvc0 mapped to whatever console the system was configured for (network or hvsi serial port) via the service processor. On OPAL v2 we have hvcN mapped to the Nth console provided by OPAL which generally corresponds to: hvc0 : network console (raw protocol) hvc1 : serial port S1 (hvsi) hvc2 : serial port S2 (hvsi) Note: At this point, early debug console only works with OPAL v1 and shouldn't be enabled in a normal kernel. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Add support for instanciating OPAL v2 from Open FirmwareBenjamin Herrenschmidt2011-09-201-19/+117
| | | | | | | | | | | | | | | | OPAL v2 is instantiated in a way similar to RTAS using Open Firmware client interface calls, and the resulting address and entry point are put in the device-tree Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Basic support for OPALBenjamin Herrenschmidt2011-09-201-0/+7
| | | | | | | | | | | | | | | | Add definition of OPAL interfaces along with the wrappers to call into OPAL runtime and the early device-tree parsing hook to locate the OPAL runtime firmware. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Get kernel command line accross OPAL takeoverBenjamin Herrenschmidt2011-09-203-1/+13
| | | | | | | | | | | | | | | | We stash it in boot_command_line which isn't in BSS and so won't be overwritten. We then use that as a default cmd_line before we walk the device-tree. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Add OPAL takeover from PowerVMBenjamin Herrenschmidt2011-09-203-18/+228
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On machines supporting the OPAL firmware version 1, the system is initially booted under pHyp. We then use a special hypercall to verify if OPAL is available and if it is, we then trigger a "takeover" which disables pHyp and loads the OPAL runtime firmware, giving control to the kernel in hypervisor mode. This patch add the necessary code to detect that the OPAL takeover capability is present when running under PowerVM (aka pHyp) and perform said takeover to get hypervisor control of the processor. To perform the takeover, we must first use RTAS (within Open Firmware runtime environment) to start all processors & threads, in order to give control to OPAL on all of them. We then call the takeover hypercall on everybody, OPAL will re-enter the kernel main entry point passing it a flat device-tree. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/powernv: Don't clobber r9 in relative_toc()Benjamin Herrenschmidt2011-09-201-3/+3
| | | | | | | | | | | | | | | | | | With OPAL, r8 and r9 will be used to pass the OPAL base and entry for debugging purposes (those informations are also in the device-tree). We don't want to clobber those registers that early. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/pci: Call pcie_bus_configure_settings()Benjamin Herrenschmidt2011-09-201-0/+11
| | | | | | | | | | | | | | | | | | | | This new function is used to properly setup the PCI Express Max Payload Size (and in some circumstances Max Read Request Size). Some systems will not operate properly if these aren't set correctly and the firmware doesn't always do it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/smp: More generic support for "soft hotplug"Benjamin Herrenschmidt2011-09-201-5/+25
| | | | | | | | | | | | | | | | | | | | This adds more generic support for doing CPU hotplug with a simple idle loop and no actual reset of the processors. The generic smp_generic_kick_cpu() does the hotplug bringup trick if the PACA shows that the CPU has already been started at boot and we provide an accessor for the CPU state. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Coding style cleanupsAnton Blanchard2011-09-201-7/+13
| | | | | | | | | | | | | | | | While converting code to use for_each_node_by_type I noticed a number of coding style issues. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Use for_each_node_by_type instead of open coding itAnton Blanchard2011-09-202-3/+2
| | | | | | | | | | | | | | Use for_each_node_by_type instead of open coding it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/ps3: Add gelic udbg driverHector Martin2011-09-201-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Add a new udbg driver for the PS3 gelic Ehthernet device. This driver shares only a few stucture and constant definitions with the gelic Ethernet device driver, so is implemented as a stand-alone driver with no dependencies on the gelic Ethernet device driver. Signed-off-by: Hector Martin <hector@marcansoft.com> Signed-off-by: Andre Heider <a.heider@gmail.com> Signed-off-by: Geoff Levand <geoff@infradead.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/mm: Fix the call trace when resumed from hibernationTang Yuantian2011-09-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In SMP mode, the kernel would produce call trace when resumed from hibernation. The reason is when the function destroy_context is called to drop the resuming mm context, the mm->context.active is 1 which is wrong and should be zero. We pass the current->active_mm as previous mm context to function switch_mmu_context to decrease the context.active by 1. In UP mode, there is no effect. Signed-off-by: Tang Yuantian <b29983@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc/32: Pass device tree address as u64 to machine_initScott Wood2011-09-206-56/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | u64 is used rather than phys_addr_t to keep things simple, as this is called from assembly code. Update callers to pass a 64-bit address in r3/r4. Other unused register assignments that were once parameters to machine_init are dropped. For FSL BookE, look up the physical address of the device tree from the effective address passed in r3 by the loader. This is required for situations where memory does not start at zero (due to AMP or IOMMU-less virtualization), and thus the IMA doesn't start at zero, and thus the device tree effective address does not equal the physical address. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Hugetlb for BookEBecky Bruce2011-09-201-19/+114
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable hugepages on Freescale BookE processors. This allows the kernel to use huge TLB entries to map pages, which can greatly reduce the number of TLB misses and the amount of TLB thrashing experienced by applications with large memory footprints. Care should be taken when using this on FSL processors, as the number of large TLB entries supported by the core is low (16-64) on current processors. The supported set of hugepage sizes include 4m, 16m, 64m, 256m, and 1g. Page sizes larger than the max zone size are called "gigantic" pages and must be allocated on the command line (and cannot be deallocated). This is currently only fully implemented for Freescale 32-bit BookE processors, but there is some infrastructure in the code for 64-bit BooKE. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * serial/8250: Move UPIO_TSI to powerpcArnd Bergmann2011-09-201-0/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This iotype is only used by the legacy_serial code in powerpc, so the code should live there, rather than be compiled in for every 8250 driver. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linuxppc-dev@lists.ozlabs.org Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: linux-serial@vger.kernel.org Acked-by: David Daney <david.daney@cavium.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Tidy up dma_map_ops after adding new hookMilton Miller2011-09-204-29/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | The new get_required_mask hook name is longer than many of but not all of the prior ops. Tidy the struct initializers to align the equal signs using the local whitespace. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Cc: benh@kernel.crashing.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Use the newly added get_required_mask dma_map_ops hookMilton Miller2011-09-205-28/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that the generic code has dma_map_ops set, instead of having a messy ifdef & if block in the base dma_get_required_mask hook push the computation into the dma ops. If the ops fails to set the get_required_mask hook default to the width of dma_addr_t. This also corrects ibmbus ibmebus_dma_supported to require a 64 bit mask. I doubt anything is checking or setting the dma mask on that bus. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Cc: benh@kernel.crashing.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * powerpc: Override dma_get_required_mask by platform hook and opsMilton Miller2011-09-012-0/+52
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The hook dma_get_required_mask is supposed to return the mask required by the platform to operate efficently. The generic version of dma_get_required_mask in driver/base/platform.c returns a mask based only on max_pfn. However, this is likely too big for iommu systems and could be too small for platforms that require a dma offset or have a secondary window at a high offset. Override the default, provide a hook in ppc_md used by pseries lpar and cell, and provide the default answer based on memblock_end_of_DRAM(), with hooks for get_dma_offset, and provide an implementation for iommu that looks at the defined table size. Coverting from the end address to the required bit mask is based on the generic implementation. The need for this was discovered when the qla2xxx driver switched to 64 bit dma then reverted to 32 bit when dma_get_required_mask said 32 bits was sufficient. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Cc: benh@kernel.crashing.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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