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* powerpc: Add denormalisation exception handling for POWER6/7Michael Neuling2012-09-17
| | | | | | | | | | | | | | | | | | | On POWER6 and POWER7 if the input operand to an instruction is a denormalised single precision binary floating point value we can take a denormalisation exception where it's expected that the hypervisor (HV=1) will fix up the inputs before the instruction is run. This adds code to handle this denormalisation exception for POWER6 and POWER7. It also add a CONFIG_PPC_DENORMALISATION option and sets it in pseries/ppc64_defconfig. This is useful on bare metal systems only. Based on patch from Milton Miller. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge remote-tracking branch 'pci/pci/gavin-window-alignment' into nextBenjamin Herrenschmidt2012-09-17
|\ | | | | | | | | | | | | Merge Gavin patches from the PCI tree as subsequent powerpc patches are going to depend on them Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * Merge commit 'v3.6-rc5' into pci/gavin-window-alignmentBjorn Helgaas2012-09-13
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * commit 'v3.6-rc5': (1098 commits) Linux 3.6-rc5 HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured Remove user-triggerable BUG from mpol_to_str xen/pciback: Fix proper FLR steps. uml: fix compile error in deliver_alarm() dj: memory scribble in logi_dj Fix order of arguments to compat_put_time[spec|val] xen: Use correct masking in xen_swiotlb_alloc_coherent. xen: fix logical error in tlb flushing xen/p2m: Fix one-off error in checking the P2M tree directory. powerpc: Don't use __put_user() in patch_instruction powerpc: Make sure IPI handlers see data written by IPI senders powerpc: Restore correct DSCR in context switch powerpc: Fix DSCR inheritance in copy_thread() powerpc: Keep thread.dscr and thread.dscr_inherit in sync powerpc: Update DSCR on all CPUs when writing sysfs dscr_default powerpc/powernv: Always go into nap mode when CPU is offline powerpc: Give hypervisor decrementer interrupts their own handler powerpc/vphn: Fix arch_update_cpu_topology() return value ARM: gemini: fix the gemini build ... Conflicts: drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c drivers/rapidio/devices/tsi721.c
| * | powerpc/PCI: Override pcibios_window_alignment()Gavin Shan2012-09-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements pcibios_window_alignment() so powerpc platforms can force P2P bridge windows to be at larger alignments than the PCI spec requires. [bhelgaas: changelog] Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
* | | powerpc: cleanup old DABRX #definesMichael Neuling2012-09-09
| | | | | | | | | | | | | | | | | | | | | These are no longer used so get rid of them Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc: Dynamically calculate the dabrx based on kernel/user/hypervisorMichael Neuling2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we mark the DABRX to interrupt on all matches (hypervisor/kernel/user and then filter in software. We can be a lot smarter now that we can set the DABRX dynamically. This sets the DABRX based on the flags passed by the user. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc: Rework set_dabr so it can take a DABRX value as wellMichael Neuling2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rework set_dabr to take a DABRX value as well. Both the pseries and PS3 hypervisors do some checks on the DABRX values that are passed in the hcall. This patch stops bogus values from being passed to hypervisor. Also, in the case where we are clearing the breakpoint, where DABR and DABRX are zero, we modify the DABRX value to make it valid so that the hcall won't fail. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Cleanup on EEH PCI address cacheGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch does cleanup on EEH PCI address cache based on the fact EEH core is the only user of the component. * Cleanup on function names so that they all have prefix "eeh" and looks more short. * Function printk() has been replaced with pr_debug() or pr_warning() accordingly. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Trace eeh device from I/O cacheGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The idea comes from Benjamin Herrenschmidt. The eeh cache helps fetching the pci device according to the given I/O address. Since the eeh cache is serving for eeh, it's reasonable for eeh cache to trace eeh device except pci device. The patch make eeh cache to trace eeh device. Also, the major eeh entry function eeh_dn_check_failure has been renamed to eeh_dev_check_failure since it will take eeh device as input parameter. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Probe mode supportGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While EEH module is installed, PCI devices is checked one by one to see if it supports eeh. On different platforms, the PCI devices are referred through different ways when the EEH module is loaded. For example, on pSeries platform, that is done by OF node. However, we would do that by real PCI devices (struct pci_dev) on PowerNV platform in future. So we needs some mechanism to differentiate those cases by classifying them to probe modes, either from OF nodes or real PCI devices. The patch implements the support to eeh probe mode. Also, the EEH on pSeries has set it into EEH_PROBE_MODE_DEVTREE. That means the probe will be done based on OF nodes on pSeries platform. In addition, On pSeries platform, it's done by OF nodes. The patch moves the the probe function from EEH core to platform dependent backend and some cleanup applied. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Move stats to PEGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch removes the eeh related statistics for eeh device since they have been maintained by the corresponding eeh PE. Also, the flags used to trace the state of eeh device and PE have been reworked for a little bit. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Handle EEH error based on PEGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | The patch reworks the current implementation so that the eeh errors will be handled basing on PE instead of eeh device. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Do reset based on PEGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch implements reset based on PE instead of eeh device. Also, The functions used to retrieve the reset type, either hot or fundamental reset, have been reworked for a little bit. More specificly, it's implemented based the the eeh device traverse function. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: I/O enable and log retrival based on PEGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | The patch refactors the original implementation in order to enable I/O and retrieve EEH log based on PE. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Device bars restore based on PEGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | The patch introduces the function to traverse the devices of the specified PE and its child PEs. Also, the restore on device bars is implemented based on the traverse function. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Make EEH operations based on PEGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Originally, all the EEH operations were implemented based on OF node. Actually, it explicitly breaks the rules that the operation target is PE instead of device. Therefore, the patch makes all the operations based on PE instead of device. Unfortunately, the backend for config space has to be kept as original because it doesn't depend on PE. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Trace error based on PE from beginningGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There're 2 conditions to trigger EEH error detection: invalid value returned from reading I/O or config space. On each case, the function eeh_dn_check_failure will be called to initialize EEH event and put it into the poll for further processing. The patch changes the function for a little bit so that the EEH error will be traced based on PE instead of EEH device any more. Also, the function eeh_find_device_pe() has been removed since the eeh device is tracing the PE by struct eeh_dev::pe. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Trace EEH state based on PEGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since we've introduced dedicated struct to trace individual PEs, it's reasonable to trace its state through the dedicated struct instead of using "eeh_dev" any more. The patches implements the state tracing based on PE. It's notable that the PE state will be applied to the specified PE as well as its child PEs. That complies with the rule that problematic parent PE will prevent those child PEs from working properly. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Build EEH event based on PEGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | The original implementation builds EEH event based on EEH device. We already had dedicated struct to depict PE. It's reasonable to build EEH event based on PE. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Remove PE at appropriate timeGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | During PCI hotplug and EEH recovery, the PE hierarchy tree might be changed due to the PCI topology changes. At later point when the PCI device is added, the PE will be created dynamically again. The patch introduces new function to remove EEH devices from the associated PE. That also can cause that the parent PE is removed from the PE tree if the parent PE doesn't include valid EEH devices and child PEs. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Create PEs duing EEH initializationGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch creates PEs and associated the newly created PEs with it parent/silbing as well as EEH devices. It would become more straight to trace EEH errors and recover them accordingly. Once the EEH functionality on one PCI IOA has been enabled, we tries to create PE against it. If there's existing PE, to which the current PCI IOA should be attached, the existing PE will be converted from "device" type to "bus" type accordingly. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Search PE based on requirementGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch implements searching PE based on the following requirements: * Search PE according to PE address, which is traditional PE address that is composed of PCI bus/device/function number, or unified PE address assigned by firmware or platform. * Search parent PE according to the given EEH device. It's useful when creating new PE and put it into right position. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Create PEs for PHBsGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For one particular PE, it's only meaningful in the ancestor PHB domain. Therefore, each PHB should have its own PE hierarchy tree to trace those PEs created against the PHB. The patch creates PEs for the PHBs and put those PEs into the global link list traced by "eeh_phb_pe". The link list of PEs would be first level of overall PE hierarchy tree across the system. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Introduce global mutexGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | The patch introduces global mutex for EEH so that the core data structures can be protected by that. Also, 2 inline functions are exported for that: eeh_lock() and eeh_unlock(). Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Introduce eeh_pe structGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As defined in PAPR 2.4, Partitionable Endpoint (PE) is an I/O subtree that can be treated as a unit for the purposes of partitioning and error recovery. Therefore, eeh core should be aware of PE. With eeh_pe struct, we can support PE explicitly. Further more, it makes all the stuff much more data centralized. Another important reason is for eeh core to support multiple platforms. Some of them like pSeries figures out PEs through OF nodes while others like powernv have to do that through PCI bus/device tree. With explicit PE support, eeh core will be implemented based on the centrialized data and platform dependent implementations figure it out by their feasible ways. When the struct is designed, following factors are taken in account: * Reflecting the relationships of PEs. PE might have parent as well children. * Reflecting the association of PE and (eeh) devices. * PEs have PHB boundary. * PE should have unique address assigned in the corresponding PHB domain. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc/eeh: Move EEH initialization aroundGavin Shan2012-09-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, we have 3 phases for EEH initialization on pSeries platform. All of them are done through builtin functions: platform initialization, EEH device creation, and EEH subsystem enablement. All of them are done no later than ppc_md.setup_arch. That means that the slab/slub isn't ready yet, so we have to allocate memory chunks on basis of PAGE_SIZE for those dynamically created EEH devices. That's pretty expensive. In order to utilize slab/slub for memory allocation, we have to move the EEH initialization functions around, but all of them should be called after slab is ready. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc: Pack arch_hw_breakpoint to avoid holes in structMichael Neuling2012-09-06
| | | | | | | | | | | | | | | | | | | | | No functional change Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc: Change memory_limit from phys_addr_t to unsigned long longSuzuki Poulose2012-09-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are some device-tree nodes, whose values are of type phys_addr_t. The phys_addr_t is variable sized based on the CONFIG_PHSY_T_64BIT. Change these to a fixed unsigned long long for consistency. This patch does the change only for memory_limit. The following is a list of such variables which need the change: 1) kernel_end, crashk_size - in arch/powerpc/kernel/machine_kexec.c 2) (struct resource *)crashk_res.start - We could export a local static variable from machine_kexec.c. Changing the above values might break the kexec-tools. So, I will fix kexec-tools first to handle the different sized values and then change the above. Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Suzuki K. Poulose <suzuki@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | powerpc: Define Power7+ PV constant PV_POWER7psukadev@linux.vnet.ibm.com2012-09-06
| | | | | | | | | | | | | | | | | | | | | This definition will be used by subsequent perf and oprofile patches Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | Merge branch 'merge' into nextBenjamin Herrenschmidt2012-09-06
|\ \ \ | | |/ | |/| | | | Brings in various bug fixes from 3.6-rcX
| * | powerpc/powernv: Always go into nap mode when CPU is offlinePaul Mackerras2012-09-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The CPU hotplug code for the powernv platform currently only puts offline CPUs into nap mode if the powersave_nap variable is set. However, HV-style KVM on this platform requires secondary CPU threads to be offline and in nap mode. Since we know nap mode works just fine on all POWER7 machines, and the only machines that support the powernv platform are POWER7 machines, this changes the code to always put offline CPUs into nap mode, regardless of powersave_nap. Powersave_nap still controls whether or not CPUs go into nap mode when idle, as before. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | Merge branch 'merge' of ↵Linus Torvalds2012-08-25
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc Pull powerpc fixes from Benjamin Herrenschmidt: "I meant to sent that earlier but got swamped with other things, so here are some powerpc fixes for 3.6. A few regression fixes and some bug fixes that I deemed should still make it. There's a FSL update from Kumar with a bunch of defconfig updates along with a few embedded fixes. I also reverted my g5_defconfig update that I merged earlier as it was completely busted, not too sure what happened there, I'll do a new one later." * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: Revert "powerpc: Update g5_defconfig" powerpc/perf: Use pmc_overflow() to detect rolled back events powerpc: Fix VMX in interrupt check in POWER7 copy loops powerpc: POWER7 copy_to_user/copy_from_user patch applied twice powerpc: Fix personality handling in ppc64_personality() powerpc/dma-iommu: Fix IOMMU window check powerpc: Remove unnecessary ifdefs powerpc/kgdb: Restore current_thread_info properly powerpc/kgdb: Bail out of KGDB when we've been triggered powerpc/kgdb: Do not set kgdb_single_step on ppc powerpc/mpic_msgr: Add missing includes powerpc: Fix null pointer deref in perf hardware breakpoints powerpc: Fixup whitespace in xmon powerpc: Fix xmon dl command for new printk implementation powerpc/fsl: fix "Failed to mount /dev: No such device" errors powerpc/fsl: update defconfigs booke/wdt: some ioctls do not return values properly powerpc/p4080ds: dts - add usb controller version info and port0 powerpc/85xx: mpc85xx_defconfig - add VIA PATA support for MPC85xxCDS powerpc/fsl-pci: Only scan PCI bus if configured as a host
| | * | powerpc: Remove unnecessary ifdefsMichael Neuling2012-08-24
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| | * | powerpc/mpic_msgr: Add missing includesScott Wood2012-08-24
| | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | Add several #includes that mpic_msgr relies on being pulled implicitly, which only happens on certain configs. Signed-off-by: Scott Wood <scottwood@freescale.com> Cc: Meador Inge <meador_inge@mentor.com> Cc: Jia Hongtao <B38951@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * / KVM: PPC: Add cache flush on page mapAlexander Graf2012-08-16
| |/ | | | | | | | | | | | | | | | | When we map a page that wasn't icache cleared before, do so when first mapping it in KVM using the same information bits as the Linux mapping logic. That way we are 100% sure that any page we map does not have stale entries in the icache. Signed-off-by: Alexander Graf <agraf@suse.de>
* | powerpc/kprobes: Rename opcode_t in probes.h to ppc_opcode_tAnanth N Mavinakayanahalli2012-09-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | commit: 8b7b80b9ebb46dd88fbb94e918297295cf312b59 [24/29] powerpc: Uprobes port to powerpc Caused a clash with the fore200e driver: In file included from drivers/atm/fore200e.c:70:0: drivers/atm/fore200e.h:263:3: error: redefinition of typedef 'opcode_t' with different type arch/powerpc/include/asm/probes.h:25:13: note: previous declaration of 'opcode_t' was here Fix the namespace clash by making opcode_t in probes.h to ppc_opcode_t. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Restore VDSO information on critical exception om BookEMihai Caraman2012-09-06
| | | | | | | | | | | | | | | | | | | | Critical exception on 64-bit booke uses user-visible SPRG3 as scratch. Restore VDSO information in SPRG3 on exception prolog. Use a common sprg3 field in PACA for all powerpc64 architectures. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/booke64: Use SPRG0/3 scratch for bolted TLB miss & crit intMihai Caraman2012-09-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Embedded.Hypervisor category defines GSPRG0..3 physical registers for guests. Avoid SPRG4-7 usage as scratch in host exception handlers, otherwise guest SPRG4-7 registers will be clobbered. For bolted TLB miss exception handlers, which is the version currently supported by KVM, use SPRN_SPRG_GEN_SCRATCH aka SPRG0 instead of SPRN_SPRG_TLB_SCRATCH aka SPRG6. Keep using TLB PACA slots to fit in one 64-byte cache line. For critical exception handlers use SPRG3 instead of SPRG7. Provide a routine to store and restore user-visible SPRGs. This will be subsequently used to restore VDSO information in SPRG3. Add EX_R13 to paca slots to free up SPRG3 and change the critical exception epilog to use it. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/booke64: Use GSRR registers in Guest Doorbell interruptsMihai Caraman2012-09-05
| | | | | | | | | | | | | | | | | | Guest Doorbell interrupts use guest save and restore registers. Add a new Guest Doorbell exception type to accommodate GSRR0/1 SPRs usage in exception prolog and fix the exception handler. Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Uprobes port to powerpcAnanth N Mavinakayanahalli2012-09-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the port of uprobes to powerpc. Usage is similar to x86. [root@xxxx ~]# ./bin/perf probe -x /lib64/libc.so.6 malloc Added new event: probe_libc:malloc (on 0xb4860) You can now use it in all perf tools, such as: perf record -e probe_libc:malloc -aR sleep 1 [root@xxxx ~]# ./bin/perf record -e probe_libc:malloc -aR sleep 20 [ perf record: Woken up 22 times to write data ] [ perf record: Captured and wrote 5.843 MB perf.data (~255302 samples) ] [root@xxxx ~]# ./bin/perf report --stdio ... 69.05% tar libc-2.12.so [.] malloc 28.57% rm libc-2.12.so [.] malloc 1.32% avahi-daemon libc-2.12.so [.] malloc 0.58% bash libc-2.12.so [.] malloc 0.28% sshd libc-2.12.so [.] malloc 0.08% irqbalance libc-2.12.so [.] malloc 0.05% bzip2 libc-2.12.so [.] malloc 0.04% sleep libc-2.12.so [.] malloc 0.03% multipathd libc-2.12.so [.] malloc 0.01% sendmail libc-2.12.so [.] malloc 0.01% automount libc-2.12.so [.] malloc The trap_nr addition patch is a prereq. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Add trap_nr to thread_structAnanth N Mavinakayanahalli2012-09-05
| | | | | | | | | | | | | | | | | | | | | | | | Add thread_struct.trap_nr and use it to store the last exception the thread experienced. In this patch, we populate the field at various places where we force_sig_info() to the process. This is also used in uprobes to determine if the probed instruction caused an exception. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Consolidate {k,u}probe definitionsAnanth N Mavinakayanahalli2012-09-05
| | | | | | | | | | | | | | | | | | | | | | | | Move is_trap() and relatives to a common file to be shared between kprobes and uprobes. Code movement only; no change in functionality. Suggested by Michael Ellerman. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Rename 64-bit PVR constants to PVR_fooMichael Ellerman2012-09-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We have an old FIXME in reg.h which points out that we should standardise on PVR_foo for our PVR #defines. Currently we use PVR_ on 32-bit and PV_ on 64-bit. So do that rename and remove the FIXME. Seeing as we're touching all but one usage of __is_processor(), rename it to something less ugly and more indicative of what it does, which is simply to check the PVR version. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Remove <asm/abs_addr.h>Michael Ellerman2012-09-05
| | | | | | | | | | | | | | It contains no code and is not included by anyone. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Remove virt_to_abs() now all users have been fixedMichael Ellerman2012-09-05
| | | | | | | | | | Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Remove abs_to_virt() now all users have been fixedMichael Ellerman2012-09-05
| | | | | | | | | | Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Remove phys_to_abs() now all users have been removedMichael Ellerman2012-09-05
| | | | | | | | | | Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc: Remove remaining iSeries chunksMichael Ellerman2012-09-05
|/ | | | | | | | | | | | | | In commit f5339277 "powerpc: Remove FW_FEATURE ISERIES from arch code", we removed the bulk of the iSeries code, but missed a few bits. Remove the mschunks bits, these were only ever used on iSeries as far as I know, and are definitely not used anymore. Make it even clearer that phys_to_abs() is a nop, by making it a macro. We still have a few users of this, but should clean those up. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge branch 'akpm' (Andrew's patch-bomb)Linus Torvalds2012-07-30
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge Andrew's first set of patches: "Non-MM patches: - lots of misc bits - tree-wide have_clk() cleanups - quite a lot of printk tweaks. I draw your attention to "printk: convert the format for KERN_<LEVEL> to a 2 byte pattern" which looks a bit scary. But afaict it's solid. - backlight updates - lib/ feature work (notably the addition and use of memweight()) - checkpatch updates - rtc updates - nilfs updates - fatfs updates (partial, still waiting for acks) - kdump, proc, fork, IPC, sysctl, taskstats, pps, etc - new fault-injection feature work" * Merge emailed patches from Andrew Morton <akpm@linux-foundation.org>: (128 commits) drivers/misc/lkdtm.c: fix missing allocation failure check lib/scatterlist: do not re-write gfp_flags in __sg_alloc_table() fault-injection: add tool to run command with failslab or fail_page_alloc fault-injection: add selftests for cpu and memory hotplug powerpc: pSeries reconfig notifier error injection module memory: memory notifier error injection module PM: PM notifier error injection module cpu: rewrite cpu-notifier-error-inject module fault-injection: notifier error injection c/r: fcntl: add F_GETOWNER_UIDS option resource: make sure requested range is included in the root range include/linux/aio.h: cpp->C conversions fs: cachefiles: add support for large files in filesystem caching pps: return PTR_ERR on error in device_create taskstats: check nla_reserve() return sysctl: suppress kmemleak messages ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSION ipc: compat: use signed size_t types for msgsnd and msgrcv ipc: allow compat IPC version field parsing if !ARCH_WANT_OLD_COMPAT_IPC ipc: add COMPAT_SHMLBA support ...
| * ipc: use Kconfig options for __ARCH_WANT_[COMPAT_]IPC_PARSE_VERSIONWill Deacon2012-07-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than #define the options manually in the architecture code, add Kconfig options for them and select them there instead. This also allows us to select the compat IPC version parsing automatically for platforms using the old compat IPC interface. Reported-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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