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powerpc updates for 4.8 # 1

Browse source 
Highlights:
  - PowerNV PCI hotplug support.
  - Lots more Power9 support.
  - eBPF JIT support on ppc64le.
  - Lots of cxl updates.
  - Boot code consolidation.
 
 Bug fixes:
  - Fix spin_unlock_wait() from Boqun Feng
  - Fix stack pointer corruption in __tm_recheckpoint() from Michael Neuling
  - Fix multiple bugs in memory_hotplug_max() from Bharata B Rao
  - mm: Ensure "special" zones are empty from Oliver O'Halloran
  - ftrace: Separate the heuristics for checking call sites from Michael Ellerman
  - modules: Never restore r2 for a mprofile-kernel style mcount() call from Michael Ellerman
  - Fix endianness when reading TCEs from Alexey Kardashevskiy
  - start rtasd before PCI probing from Greg Kurz
  - PCI: rpaphp: Fix slot registration for multiple slots under a PHB from Tyrel Datwyler
  - powerpc/mm: Add memory barrier in __hugepte_alloc() from Sukadev Bhattiprolu
 
 Cleanups & fixes:
  - Drop support for MPIC in pseries from Rashmica Gupta
  - Define and use PPC64_ELF_ABI_v2/v1 from Michael Ellerman
  - Remove unused symbols in asm-offsets.c from Rashmica Gupta
  - Fix SRIOV not building without EEH enabled from Russell Currey
  - Remove kretprobe_trampoline_holder. from Thiago Jung Bauermann
  - Reduce log level of PCI I/O space warning from Benjamin Herrenschmidt
  - Add array bounds checking to crash_shutdown_handlers from Suraj Jitindar Singh
  - Avoid -maltivec when using clang integrated assembler from Anton Blanchard
  - Fix array overrun in ppc_rtas() syscall from Andrew Donnellan
  - Fix error return value in cmm_mem_going_offline() from Rasmus Villemoes
  - export cpu_to_core_id() from Mauricio Faria de Oliveira
  - Remove old symbols from defconfigs from Andrew Donnellan
  - Update obsolete comments in setup_32.c about entry conditions from Benjamin Herrenschmidt
  - Add comment explaining the purpose of setup_kdump_trampoline() from Benjamin Herrenschmidt
  - Merge the RELOCATABLE config entries for ppc32 and ppc64 from Kevin Hao
  - Remove RELOCATABLE_PPC32 from Kevin Hao
  - Fix .long's in tlb-radix.c to more meaningful from Balbir Singh
 
 Minor cleanups & fixes:
  - Andrew Donnellan, Anna-Maria Gleixner, Anton Blanchard, Benjamin
    Herrenschmidt, Bharata B Rao, Christophe Leroy, Colin Ian King, Geliang
    Tang, Greg Kurz, Madhavan Srinivasan, Michael Ellerman, Michael Ellerman,
    Stephen Rothwell, Stewart Smith.
 
 Freescale updates from Scott:
  - "Highlights include more 8xx optimizations, device tree updates,
    and MVME7100 support."
 
 PowerNV PCI hotplug from Gavin Shan:
  - PCI: Add pcibios_setup_bridge()
  - Override pcibios_setup_bridge()
  - Remove PCI_RESET_DELAY_US
  - Move pnv_pci_ioda_setup_opal_tce_kill() around
  - Increase PE# capacity
  - Allocate PE# in reverse order
  - Create PEs in pcibios_setup_bridge()
  - Setup PE for root bus
  - Extend PCI bridge resources
  - Make pnv_ioda_deconfigure_pe() visible
  - Dynamically release PE
  - Update bridge windows on PCI plug
  - Delay populating pdn
  - Support PCI slot ID
  - Use PCI slot reset infrastructure
  - Introduce pnv_pci_get_slot_id()
  - Functions to get/set PCI slot state
  - PCI/hotplug: PowerPC PowerNV PCI hotplug driver
  - Print correct PHB type names
 
 Power9 idle support from Shreyas B. Prabhu:
  - set power_save func after the idle states are initialized
  - Use PNV_THREAD_WINKLE macro while requesting for winkle
  - make hypervisor state restore a function
  - Rename idle_power7.S to idle_book3s.S
  - Rename reusable idle functions to hardware agnostic names
  - Make pnv_powersave_common more generic
  - abstraction for saving SPRs before entering deep idle states
  - Add platform support for stop instruction
  - cpuidle/powernv: Use CPUIDLE_STATE_MAX instead of MAX_POWERNV_IDLE_STATES
  - cpuidle/powernv: cleanup cpuidle-powernv.c
  - cpuidle/powernv: Add support for POWER ISA v3 idle states
  - Use deepest stop state when cpu is offlined
 
 Power9 PMU from Madhavan Srinivasan:
  - factor out power8 pmu macros and defines
  - factor out power8 pmu functions
  - factor out power8 __init_pmu code
  - Add power9 event list macros for generic and cache events
  - Power9 PMU support
  - Export Power9 generic and cache events to sysfs
 
 Power9 preliminary interrupt & PCI support from Benjamin Herrenschmidt:
  - Add XICS emulation APIs
  - Move a few exception common handlers to make room
  - Add support for HV virtualization interrupts
  - Add mechanism to force a replay of interrupts
  - Add ICP OPAL backend
  - Discover IODA3 PHBs
  - pci: Remove obsolete SW invalidate
  - opal: Add real mode call wrappers
  - Rename TCE invalidation calls
  - Remove SWINV constants and obsolete TCE code
  - Rework accessing the TCE invalidate register
  - Fallback to OPAL for TCE invalidations
  - Use the device-tree to get available range of M64's
  - Check status of a PHB before using it
  - pci: Don't try to allocate resources that will be reassigned
 
 Other Power9:
  - Send SIGBUS on unaligned copy and paste from Chris Smart
  - Large Decrementer support from Oliver O'Halloran
  - Load Monitor Register Support from Jack Miller
 
 Performance improvements from Anton Blanchard:
  - Avoid load hit store in __giveup_fpu() and __giveup_altivec()
  - Avoid load hit store in setup_sigcontext()
  - Remove assembly versions of strcpy, strcat, strlen and strcmp
  - Align hot loops of some string functions
 
 eBPF JIT from Naveen N. Rao:
  - Fix/enhance 32-bit Load Immediate implementation
  - Optimize 64-bit Immediate loads
  - Introduce rotate immediate instructions
  - A few cleanups
  - Isolate classic BPF JIT specifics into a separate header
  - Implement JIT compiler for extended BPF
 
 Operator Panel driver from Suraj Jitindar Singh:
  - devicetree/bindings: Add binding for operator panel on FSP machines
  - Add inline function to get rc from an ASYNC_COMP opal_msg
  - Add driver for operator panel on FSP machines
 
 Sparse fixes from Daniel Axtens:
  - make some things static
  - Introduce asm-prototypes.h
  - Include headers containing prototypes
  - Use #ifdef __BIG_ENDIAN__ #else for REG_BYTE
  - kvm: Clarify __user annotations
  - Pass endianness to sparse
  - Make ppc_md.{halt, restart} __noreturn
 
 MM fixes & cleanups from Aneesh Kumar K.V:
  - radix: Update LPCR HR bit as per ISA
  - use _raw variant of page table accessors
  - Compile out radix related functions if RADIX_MMU is disabled
  - Clear top 16 bits of va only on older cpus
  - Print formation regarding the the MMU mode
  - hash: Update SDR1 size encoding as documented in ISA 3.0
  - radix: Update PID switch sequence
  - radix: Update machine call back to support new HCALL.
  - radix: Add LPID based tlb flush helpers
  - radix: Add a kernel command line to disable radix
  - Cleanup LPCR defines
 
 Boot code consolidation from Benjamin Herrenschmidt:
  - Move epapr_paravirt_early_init() to early_init_devtree()
  - cell: Don't use flat device-tree after boot
  - ge_imp3a: Don't use the flat device-tree after boot
  - mpc85xx_ds: Don't use the flat device-tree after boot
  - mpc85xx_rdb: Don't use the flat device-tree after boot
  - Don't test for machine type in rtas_initialize()
  - Don't test for machine type in smp_setup_cpu_maps()
  - dt: Add of_device_compatible_match()
  - Factor do_feature_fixup calls
  - Move 64-bit feature fixup earlier
  - Move 64-bit memory reserves to setup_arch()
  - Use a cachable DART
  - Move FW feature probing out of pseries probe()
  - Put exception configuration in a common place
  - Remove early allocation of the SMU command buffer
  - Move MMU backend selection out of platform code
  - pasemi: Remove IOBMAP allocation from platform probe()
  - mm/hash: Don't use machine_is() early during boot
  - Don't test for machine type to detect HEA special case
  - pmac: Remove spurrious machine type test
  - Move hash table ops to a separate structure
  - Ensure that ppc_md is empty before probing for machine type
  - Move 64-bit probe_machine() to later in the boot process
  - Move 32-bit probe() machine to later in the boot process
  - Get rid of ppc_md.init_early()
  - Move the boot time info banner to a separate function
  - Move setting of {i,d}cache_bsize to initialize_cache_info()
  - Move the content of setup_system() to setup_arch()
  - Move cache info inits to a separate function
  - Re-order the call to smp_setup_cpu_maps()
  - Re-order setup_panic()
  - Make a few boot functions __init
  - Merge 32-bit and 64-bit setup_arch()
 
 Other new features:
  - tty/hvc: Use IRQF_SHARED for OPAL hvc consoles from Sam Mendoza-Jonas
  - tty/hvc: Use opal irqchip interface if available from Sam Mendoza-Jonas
  - powerpc: Add module autoloading based on CPU features from Alastair D'Silva
  - crypto: vmx - Convert to CPU feature based module autoloading from Alastair D'Silva
  - Wake up kopald polling thread before waiting for events from Benjamin Herrenschmidt
  - xmon: Dump ISA 2.06 SPRs from Michael Ellerman
  - xmon: Dump ISA 2.07 SPRs from Michael Ellerman
  - Add a parameter to disable 1TB segs from Oliver O'Halloran
  - powerpc/boot: Add OPAL console to epapr wrappers from Oliver O'Halloran
  - Assign fixed PHB number based on device-tree properties from Guilherme G. Piccoli
  - pseries: Add pseries hotplug workqueue from John Allen
  - pseries: Add support for hotplug interrupt source from John Allen
  - pseries: Use kernel hotplug queue for PowerVM hotplug events from John Allen
  - pseries: Move property cloning into its own routine from Nathan Fontenot
  - pseries: Dynamic add entires to associativity lookup array from Nathan Fontenot
  - pseries: Auto-online hotplugged memory from Nathan Fontenot
  - pseries: Remove call to memblock_add() from Nathan Fontenot
 
 cxl:
  - Add set and get private data to context struct from Michael Neuling
  - make base more explicitly non-modular from Paul Gortmaker
  - Use for_each_compatible_node() macro from Wei Yongjun
  - Frederic Barrat
    - Abstract the differences between the PSL and XSL
    - Make vPHB device node match adapter's
  - Philippe Bergheaud
    - Add mechanism for delivering AFU driver specific events
    - Ignore CAPI adapters misplaced in switched slots
    - Refine slice error debug messages
  - Andrew Donnellan
    - static-ify variables to fix sparse warnings
    - PCI/hotplug: pnv_php: export symbols and move struct types needed by cxl
    - PCI/hotplug: pnv_php: handle OPAL_PCI_SLOT_OFFLINE power state
    - Add cxl_check_and_switch_mode() API to switch bi-modal cards
    - remove dead Kconfig options
    - fix potential NULL dereference in free_adapter()
  - Ian Munsie
    - Update process element after allocating interrupts
    - Add support for CAPP DMA mode
    - Fix allowing bogus AFU descriptors with 0 maximum processes
    - Fix allocating a minimum of 2 pages for the SPA
    - Fix bug where AFU disable operation had no effect
    - Workaround XSL bug that does not clear the RA bit after a reset
    - Fix NULL pointer dereference on kernel contexts with no AFU interrupts
    - powerpc/powernv: Split cxl code out into a separate file
    - Add cxl_slot_is_supported API
    - Enable bus mastering for devices using CAPP DMA mode
    - Move cxl_afu_get / cxl_afu_put to base
    - Allow a default context to be associated with an external pci_dev
    - Do not create vPHB if there are no AFU configuration records
    - powerpc/powernv: Add support for the cxl kernel api on the real phb
    - Add support for using the kernel API with a real PHB
    - Add kernel APIs to get & set the max irqs per context
    - Add preliminary workaround for CX4 interrupt limitation
    - Add support for interrupts on the Mellanox CX4
    - Workaround PE=0 hardware limitation in Mellanox CX4
    - powerpc/powernv: Fix pci-cxl.c build when CONFIG_MODULES=n
 
 selftests:
  - Test unaligned copy and paste from Chris Smart
  - Load Monitor Register Tests from Jack Miller
  - Cyril Bur
    - exec() with suspended transaction
    - Use signed long to read perf_event_paranoid
    - Fix usage message in context_switch
    - Fix generation of vector instructions/types in context_switch
  - Michael Ellerman
    - Use "Delta" rather than "Error" in normal output
    - Import Anton's mmap & futex micro benchmarks
    - Add a test for PROT_SAO
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Merge tag 'powerpc-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "Highlights:
   - PowerNV PCI hotplug support.
   - Lots more Power9 support.
   - eBPF JIT support on ppc64le.
   - Lots of cxl updates.
   - Boot code consolidation.

  Bug fixes:
   - Fix spin_unlock_wait() from Boqun Feng
   - Fix stack pointer corruption in __tm_recheckpoint() from Michael
     Neuling
   - Fix multiple bugs in memory_hotplug_max() from Bharata B Rao
   - mm: Ensure "special" zones are empty from Oliver O'Halloran
   - ftrace: Separate the heuristics for checking call sites from
     Michael Ellerman
   - modules: Never restore r2 for a mprofile-kernel style mcount() call
     from Michael Ellerman
   - Fix endianness when reading TCEs from Alexey Kardashevskiy
   - start rtasd before PCI probing from Greg Kurz
   - PCI: rpaphp: Fix slot registration for multiple slots under a PHB
     from Tyrel Datwyler
   - powerpc/mm: Add memory barrier in __hugepte_alloc() from Sukadev
     Bhattiprolu

  Cleanups & fixes:
   - Drop support for MPIC in pseries from Rashmica Gupta
   - Define and use PPC64_ELF_ABI_v2/v1 from Michael Ellerman
   - Remove unused symbols in asm-offsets.c from Rashmica Gupta
   - Fix SRIOV not building without EEH enabled from Russell Currey
   - Remove kretprobe_trampoline_holder from Thiago Jung Bauermann
   - Reduce log level of PCI I/O space warning from Benjamin
     Herrenschmidt
   - Add array bounds checking to crash_shutdown_handlers from Suraj
     Jitindar Singh
   - Avoid -maltivec when using clang integrated assembler from Anton
     Blanchard
   - Fix array overrun in ppc_rtas() syscall from Andrew Donnellan
   - Fix error return value in cmm_mem_going_offline() from Rasmus
     Villemoes
   - export cpu_to_core_id() from Mauricio Faria de Oliveira
   - Remove old symbols from defconfigs from Andrew Donnellan
   - Update obsolete comments in setup_32.c about entry conditions from
     Benjamin Herrenschmidt
   - Add comment explaining the purpose of setup_kdump_trampoline() from
     Benjamin Herrenschmidt
   - Merge the RELOCATABLE config entries for ppc32 and ppc64 from Kevin
     Hao
   - Remove RELOCATABLE_PPC32 from Kevin Hao
   - Fix .long's in tlb-radix.c to more meaningful from Balbir Singh

  Minor cleanups & fixes:
   - Andrew Donnellan, Anna-Maria Gleixner, Anton Blanchard, Benjamin
     Herrenschmidt, Bharata B Rao, Christophe Leroy, Colin Ian King,
     Geliang Tang, Greg Kurz, Madhavan Srinivasan, Michael Ellerman,
     Michael Ellerman, Stephen Rothwell, Stewart Smith.

  Freescale updates from Scott:
   - "Highlights include more 8xx optimizations, device tree updates,
     and MVME7100 support."

  PowerNV PCI hotplug from Gavin Shan:
   - PCI: Add pcibios_setup_bridge()
   - Override pcibios_setup_bridge()
   - Remove PCI_RESET_DELAY_US
   - Move pnv_pci_ioda_setup_opal_tce_kill() around
   - Increase PE# capacity
   - Allocate PE# in reverse order
   - Create PEs in pcibios_setup_bridge()
   - Setup PE for root bus
   - Extend PCI bridge resources
   - Make pnv_ioda_deconfigure_pe() visible
   - Dynamically release PE
   - Update bridge windows on PCI plug
   - Delay populating pdn
   - Support PCI slot ID
   - Use PCI slot reset infrastructure
   - Introduce pnv_pci_get_slot_id()
   - Functions to get/set PCI slot state
   - PCI/hotplug: PowerPC PowerNV PCI hotplug driver
   - Print correct PHB type names

  Power9 idle support from Shreyas B. Prabhu:
   - set power_save func after the idle states are initialized
   - Use PNV_THREAD_WINKLE macro while requesting for winkle
   - make hypervisor state restore a function
   - Rename idle_power7.S to idle_book3s.S
   - Rename reusable idle functions to hardware agnostic names
   - Make pnv_powersave_common more generic
   - abstraction for saving SPRs before entering deep idle states
   - Add platform support for stop instruction
   - cpuidle/powernv: Use CPUIDLE_STATE_MAX instead of MAX_POWERNV_IDLE_STATES
   - cpuidle/powernv: cleanup cpuidle-powernv.c
   - cpuidle/powernv: Add support for POWER ISA v3 idle states
   - Use deepest stop state when cpu is offlined

  Power9 PMU from Madhavan Srinivasan:
   - factor out power8 pmu macros and defines
   - factor out power8 pmu functions
   - factor out power8 __init_pmu code
   - Add power9 event list macros for generic and cache events
   - Power9 PMU support
   - Export Power9 generic and cache events to sysfs

  Power9 preliminary interrupt & PCI support from Benjamin Herrenschmidt:
   - Add XICS emulation APIs
   - Move a few exception common handlers to make room
   - Add support for HV virtualization interrupts
   - Add mechanism to force a replay of interrupts
   - Add ICP OPAL backend
   - Discover IODA3 PHBs
   - pci: Remove obsolete SW invalidate
   - opal: Add real mode call wrappers
   - Rename TCE invalidation calls
   - Remove SWINV constants and obsolete TCE code
   - Rework accessing the TCE invalidate register
   - Fallback to OPAL for TCE invalidations
   - Use the device-tree to get available range of M64's
   - Check status of a PHB before using it
   - pci: Don't try to allocate resources that will be reassigned

  Other Power9:
   - Send SIGBUS on unaligned copy and paste from Chris Smart
   - Large Decrementer support from Oliver O'Halloran
   - Load Monitor Register Support from Jack Miller

  Performance improvements from Anton Blanchard:
   - Avoid load hit store in __giveup_fpu() and __giveup_altivec()
   - Avoid load hit store in setup_sigcontext()
   - Remove assembly versions of strcpy, strcat, strlen and strcmp
   - Align hot loops of some string functions

  eBPF JIT from Naveen N. Rao:
   - Fix/enhance 32-bit Load Immediate implementation
   - Optimize 64-bit Immediate loads
   - Introduce rotate immediate instructions
   - A few cleanups
   - Isolate classic BPF JIT specifics into a separate header
   - Implement JIT compiler for extended BPF

  Operator Panel driver from Suraj Jitindar Singh:
   - devicetree/bindings: Add binding for operator panel on FSP machines
   - Add inline function to get rc from an ASYNC_COMP opal_msg
   - Add driver for operator panel on FSP machines

  Sparse fixes from Daniel Axtens:
   - make some things static
   - Introduce asm-prototypes.h
   - Include headers containing prototypes
   - Use #ifdef __BIG_ENDIAN__ #else for REG_BYTE
   - kvm: Clarify __user annotations
   - Pass endianness to sparse
   - Make ppc_md.{halt, restart} __noreturn

  MM fixes & cleanups from Aneesh Kumar K.V:
   - radix: Update LPCR HR bit as per ISA
   - use _raw variant of page table accessors
   - Compile out radix related functions if RADIX_MMU is disabled
   - Clear top 16 bits of va only on older cpus
   - Print formation regarding the the MMU mode
   - hash: Update SDR1 size encoding as documented in ISA 3.0
   - radix: Update PID switch sequence
   - radix: Update machine call back to support new HCALL.
   - radix: Add LPID based tlb flush helpers
   - radix: Add a kernel command line to disable radix
   - Cleanup LPCR defines

  Boot code consolidation from Benjamin Herrenschmidt:
   - Move epapr_paravirt_early_init() to early_init_devtree()
   - cell: Don't use flat device-tree after boot
   - ge_imp3a: Don't use the flat device-tree after boot
   - mpc85xx_ds: Don't use the flat device-tree after boot
   - mpc85xx_rdb: Don't use the flat device-tree after boot
   - Don't test for machine type in rtas_initialize()
   - Don't test for machine type in smp_setup_cpu_maps()
   - dt: Add of_device_compatible_match()
   - Factor do_feature_fixup calls
   - Move 64-bit feature fixup earlier
   - Move 64-bit memory reserves to setup_arch()
   - Use a cachable DART
   - Move FW feature probing out of pseries probe()
   - Put exception configuration in a common place
   - Remove early allocation of the SMU command buffer
   - Move MMU backend selection out of platform code
   - pasemi: Remove IOBMAP allocation from platform probe()
   - mm/hash: Don't use machine_is() early during boot
   - Don't test for machine type to detect HEA special case
   - pmac: Remove spurrious machine type test
   - Move hash table ops to a separate structure
   - Ensure that ppc_md is empty before probing for machine type
   - Move 64-bit probe_machine() to later in the boot process
   - Move 32-bit probe() machine to later in the boot process
   - Get rid of ppc_md.init_early()
   - Move the boot time info banner to a separate function
   - Move setting of {i,d}cache_bsize to initialize_cache_info()
   - Move the content of setup_system() to setup_arch()
   - Move cache info inits to a separate function
   - Re-order the call to smp_setup_cpu_maps()
   - Re-order setup_panic()
   - Make a few boot functions __init
   - Merge 32-bit and 64-bit setup_arch()

  Other new features:
   - tty/hvc: Use IRQF_SHARED for OPAL hvc consoles from Sam Mendoza-Jonas
   - tty/hvc: Use opal irqchip interface if available from Sam Mendoza-Jonas
   - powerpc: Add module autoloading based on CPU features from Alastair D'Silva
   - crypto: vmx - Convert to CPU feature based module autoloading from Alastair D'Silva
   - Wake up kopald polling thread before waiting for events from Benjamin Herrenschmidt
   - xmon: Dump ISA 2.06 SPRs from Michael Ellerman
   - xmon: Dump ISA 2.07 SPRs from Michael Ellerman
   - Add a parameter to disable 1TB segs from Oliver O'Halloran
   - powerpc/boot: Add OPAL console to epapr wrappers from Oliver O'Halloran
   - Assign fixed PHB number based on device-tree properties from Guilherme G. Piccoli
   - pseries: Add pseries hotplug workqueue from John Allen
   - pseries: Add support for hotplug interrupt source from John Allen
   - pseries: Use kernel hotplug queue for PowerVM hotplug events from John Allen
   - pseries: Move property cloning into its own routine from Nathan Fontenot
   - pseries: Dynamic add entires to associativity lookup array from Nathan Fontenot
   - pseries: Auto-online hotplugged memory from Nathan Fontenot
   - pseries: Remove call to memblock_add() from Nathan Fontenot

  cxl:
   - Add set and get private data to context struct from Michael Neuling
   - make base more explicitly non-modular from Paul Gortmaker
   - Use for_each_compatible_node() macro from Wei Yongjun
   - Frederic Barrat
   - Abstract the differences between the PSL and XSL
   - Make vPHB device node match adapter's
   - Philippe Bergheaud
   - Add mechanism for delivering AFU driver specific events
   - Ignore CAPI adapters misplaced in switched slots
   - Refine slice error debug messages
   - Andrew Donnellan
   - static-ify variables to fix sparse warnings
   - PCI/hotplug: pnv_php: export symbols and move struct types needed by cxl
   - PCI/hotplug: pnv_php: handle OPAL_PCI_SLOT_OFFLINE power state
   - Add cxl_check_and_switch_mode() API to switch bi-modal cards
   - remove dead Kconfig options
   - fix potential NULL dereference in free_adapter()
   - Ian Munsie
   - Update process element after allocating interrupts
   - Add support for CAPP DMA mode
   - Fix allowing bogus AFU descriptors with 0 maximum processes
   - Fix allocating a minimum of 2 pages for the SPA
   - Fix bug where AFU disable operation had no effect
   - Workaround XSL bug that does not clear the RA bit after a reset
   - Fix NULL pointer dereference on kernel contexts with no AFU interrupts
   - powerpc/powernv: Split cxl code out into a separate file
   - Add cxl_slot_is_supported API
   - Enable bus mastering for devices using CAPP DMA mode
   - Move cxl_afu_get / cxl_afu_put to base
   - Allow a default context to be associated with an external pci_dev
   - Do not create vPHB if there are no AFU configuration records
   - powerpc/powernv: Add support for the cxl kernel api on the real phb
   - Add support for using the kernel API with a real PHB
   - Add kernel APIs to get & set the max irqs per context
   - Add preliminary workaround for CX4 interrupt limitation
   - Add support for interrupts on the Mellanox CX4
   - Workaround PE=0 hardware limitation in Mellanox CX4
   - powerpc/powernv: Fix pci-cxl.c build when CONFIG_MODULES=n

  selftests:
   - Test unaligned copy and paste from Chris Smart
   - Load Monitor Register Tests from Jack Miller
   - Cyril Bur
   - exec() with suspended transaction
   - Use signed long to read perf_event_paranoid
   - Fix usage message in context_switch
   - Fix generation of vector instructions/types in context_switch
   - Michael Ellerman
   - Use "Delta" rather than "Error" in normal output
   - Import Anton's mmap & futex micro benchmarks
   - Add a test for PROT_SAO"

* tag 'powerpc-4.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (263 commits)
  powerpc/mm: Parenthesise IS_ENABLED() in if condition
  tty/hvc: Use opal irqchip interface if available
  tty/hvc: Use IRQF_SHARED for OPAL hvc consoles
  selftests/powerpc: exec() with suspended transaction
  powerpc: Improve comment explaining why we modify VRSAVE
  powerpc/mm: Drop unused externs for hpte_init_beat[_v3]()
  powerpc/mm: Rename hpte_init_lpar() and move the fallback to a header
  powerpc/mm: Fix build break when PPC_NATIVE=n
  crypto: vmx - Convert to CPU feature based module autoloading
  powerpc: Add module autoloading based on CPU features
  powerpc/powernv/ioda: Fix endianness when reading TCEs
  powerpc/mm: Add memory barrier in __hugepte_alloc()
  powerpc/modules: Never restore r2 for a mprofile-kernel style mcount() call
  powerpc/ftrace: Separate the heuristics for checking call sites
  powerpc: Merge 32-bit and 64-bit setup_arch()
  powerpc/64: Make a few boot functions __init
  powerpc: Re-order setup_panic()
  powerpc: Re-order the call to smp_setup_cpu_maps()
  powerpc/32: Move cache info inits to a separate function
  powerpc/64: Move the content of setup_system() to setup_arch()
  ...
This commit is contained in:
Linus Torvalds 2016-07-30 21:01:36 -07:00
commit bad60e6f25
532 changed files with 11335 additions and 4123 deletions
Download patch file Download diff file Expand all files Collapse all files

13
drivers/pci/hotplug/Kconfig
View file

@ -113,6 +113,19 @@ config HOTPLUG_PCI_SHPC
When in doubt, say N.
config HOTPLUG_PCI_POWERNV
tristate "PowerPC PowerNV PCI Hotplug driver"
depends on PPC_POWERNV && EEH
select OF_DYNAMIC
help
Say Y here if you run PowerPC PowerNV platform that supports
PCI Hotplug
To compile this driver as a module, choose M here: the
module will be called pnv-php.
When in doubt, say N.
config HOTPLUG_PCI_RPA
tristate "RPA PCI Hotplug driver"
depends on PPC_PSERIES && EEH

3
drivers/pci/hotplug/Makefile
View file

@ -14,6 +14,7 @@ obj-$(CONFIG_HOTPLUG_PCI_PCIE) += pciehp.o
obj-$(CONFIG_HOTPLUG_PCI_CPCI_ZT5550) += cpcihp_zt5550.o
obj-$(CONFIG_HOTPLUG_PCI_CPCI_GENERIC) += cpcihp_generic.o
obj-$(CONFIG_HOTPLUG_PCI_SHPC) += shpchp.o
obj-$(CONFIG_HOTPLUG_PCI_POWERNV) += pnv-php.o
obj-$(CONFIG_HOTPLUG_PCI_RPA) += rpaphp.o
obj-$(CONFIG_HOTPLUG_PCI_RPA_DLPAR) += rpadlpar_io.o
obj-$(CONFIG_HOTPLUG_PCI_SGI) += sgi_hotplug.o
@ -50,6 +51,8 @@ ibmphp-objs := ibmphp_core.o \
acpiphp-objs := acpiphp_core.o \
acpiphp_glue.o
pnv-php-objs := pnv_php.o
rpaphp-objs := rpaphp_core.o \
rpaphp_pci.o \
rpaphp_slot.o

711
drivers/pci/hotplug/pnv_php.c Normal file
View file

@ -0,0 +1,711 @@
/*
* PCI Hotplug Driver for PowerPC PowerNV platform.
*
* Copyright Gavin Shan, IBM Corporation 2016.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/libfdt.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <asm/opal.h>
#include <asm/pnv-pci.h>
#include <asm/ppc-pci.h>
#define DRIVER_VERSION "0.1"
#define DRIVER_AUTHOR "Gavin Shan, IBM Corporation"
#define DRIVER_DESC "PowerPC PowerNV PCI Hotplug Driver"
static LIST_HEAD(pnv_php_slot_list);
static DEFINE_SPINLOCK(pnv_php_lock);
static void pnv_php_register(struct device_node *dn);
static void pnv_php_unregister_one(struct device_node *dn);
static void pnv_php_unregister(struct device_node *dn);
static void pnv_php_free_slot(struct kref *kref)
{
struct pnv_php_slot *php_slot = container_of(kref,
struct pnv_php_slot, kref);
WARN_ON(!list_empty(&php_slot->children));
kfree(php_slot->name);
kfree(php_slot);
}
static inline void pnv_php_put_slot(struct pnv_php_slot *php_slot)
{
if (WARN_ON(!php_slot))
return;
kref_put(&php_slot->kref, pnv_php_free_slot);
}
static struct pnv_php_slot *pnv_php_match(struct device_node *dn,
struct pnv_php_slot *php_slot)
{
struct pnv_php_slot *target, *tmp;
if (php_slot->dn == dn) {
kref_get(&php_slot->kref);
return php_slot;
}
list_for_each_entry(tmp, &php_slot->children, link) {
target = pnv_php_match(dn, tmp);
if (target)
return target;
}
return NULL;
}
struct pnv_php_slot *pnv_php_find_slot(struct device_node *dn)
{
struct pnv_php_slot *php_slot, *tmp;
unsigned long flags;
spin_lock_irqsave(&pnv_php_lock, flags);
list_for_each_entry(tmp, &pnv_php_slot_list, link) {
php_slot = pnv_php_match(dn, tmp);
if (php_slot) {
spin_unlock_irqrestore(&pnv_php_lock, flags);
return php_slot;
}
}
spin_unlock_irqrestore(&pnv_php_lock, flags);
return NULL;
}
EXPORT_SYMBOL_GPL(pnv_php_find_slot);
/*
* Remove pdn for all children of the indicated device node.
* The function should remove pdn in a depth-first manner.
*/
static void pnv_php_rmv_pdns(struct device_node *dn)
{
struct device_node *child;
for_each_child_of_node(dn, child) {
pnv_php_rmv_pdns(child);
pci_remove_device_node_info(child);
}
}
/*
* Detach all child nodes of the indicated device nodes. The
* function should handle device nodes in depth-first manner.
*
* We should not invoke of_node_release() as the memory for
* individual device node is part of large memory block. The
* large block is allocated from memblock (system bootup) or
* kmalloc() when unflattening the device tree by OF changeset.
* We can not free the large block allocated from memblock. For
* later case, it should be released at once.
*/
static void pnv_php_detach_device_nodes(struct device_node *parent)
{
struct device_node *dn;
int refcount;
for_each_child_of_node(parent, dn) {
pnv_php_detach_device_nodes(dn);
of_node_put(dn);
refcount = atomic_read(&dn->kobj.kref.refcount);
if (unlikely(refcount != 1))
pr_warn("Invalid refcount %d on <%s>\n",
refcount, of_node_full_name(dn));
of_detach_node(dn);
}
}
static void pnv_php_rmv_devtree(struct pnv_php_slot *php_slot)
{
pnv_php_rmv_pdns(php_slot->dn);
/*
* Decrease the refcount if the device nodes were created
* through OF changeset before detaching them.
*/
if (php_slot->fdt)
of_changeset_destroy(&php_slot->ocs);
pnv_php_detach_device_nodes(php_slot->dn);
if (php_slot->fdt) {
kfree(php_slot->dt);
kfree(php_slot->fdt);
php_slot->dt = NULL;
php_slot->dn->child = NULL;
php_slot->fdt = NULL;
}
}
/*
* As the nodes in OF changeset are applied in reverse order, we
* need revert the nodes in advance so that we have correct node
* order after the changeset is applied.
*/
static void pnv_php_reverse_nodes(struct device_node *parent)
{
struct device_node *child, *next;
/* In-depth first */
for_each_child_of_node(parent, child)
pnv_php_reverse_nodes(child);
/* Reverse the nodes in the child list */
child = parent->child;
parent->child = NULL;
while (child) {
next = child->sibling;
child->sibling = parent->child;
parent->child = child;
child = next;
}
}
static int pnv_php_populate_changeset(struct of_changeset *ocs,
struct device_node *dn)
{
struct device_node *child;
int ret = 0;
for_each_child_of_node(dn, child) {
ret = of_changeset_attach_node(ocs, child);
if (unlikely(ret))
break;
ret = pnv_php_populate_changeset(ocs, child);
if (unlikely(ret))
break;
}
return ret;
}
static void *pnv_php_add_one_pdn(struct device_node *dn, void *data)
{
struct pci_controller *hose = (struct pci_controller *)data;
struct pci_dn *pdn;
pdn = pci_add_device_node_info(hose, dn);
if (unlikely(!pdn))
return ERR_PTR(-ENOMEM);
return NULL;
}
static void pnv_php_add_pdns(struct pnv_php_slot *slot)
{
struct pci_controller *hose = pci_bus_to_host(slot->bus);
pci_traverse_device_nodes(slot->dn, pnv_php_add_one_pdn, hose);
}
static int pnv_php_add_devtree(struct pnv_php_slot *php_slot)
{
void *fdt, *fdt1, *dt;
int ret;
/* We don't know the FDT blob size. We try to get it through
* maximal memory chunk and then copy it to another chunk that
* fits the real size.
*/
fdt1 = kzalloc(0x10000, GFP_KERNEL);
if (unlikely(!fdt1)) {
ret = -ENOMEM;
dev_warn(&php_slot->pdev->dev, "Cannot alloc FDT blob\n");
goto out;
}
ret = pnv_pci_get_device_tree(php_slot->dn->phandle, fdt1, 0x10000);
if (unlikely(ret)) {
dev_warn(&php_slot->pdev->dev, "Error %d getting FDT blob\n",
ret);
goto free_fdt1;
}
fdt = kzalloc(fdt_totalsize(fdt1), GFP_KERNEL);
if (unlikely(!fdt)) {
ret = -ENOMEM;
dev_warn(&php_slot->pdev->dev, "Cannot %d bytes memory\n",
fdt_totalsize(fdt1));
goto free_fdt1;
}
/* Unflatten device tree blob */
memcpy(fdt, fdt1, fdt_totalsize(fdt1));
dt = of_fdt_unflatten_tree(fdt, php_slot->dn, NULL);
if (unlikely(!dt)) {
ret = -EINVAL;
dev_warn(&php_slot->pdev->dev, "Cannot unflatten FDT\n");
goto free_fdt;
}
/* Initialize and apply the changeset */
of_changeset_init(&php_slot->ocs);
pnv_php_reverse_nodes(php_slot->dn);
ret = pnv_php_populate_changeset(&php_slot->ocs, php_slot->dn);
if (unlikely(ret)) {
pnv_php_reverse_nodes(php_slot->dn);
dev_warn(&php_slot->pdev->dev, "Error %d populating changeset\n",
ret);
goto free_dt;
}
php_slot->dn->child = NULL;
ret = of_changeset_apply(&php_slot->ocs);
if (unlikely(ret)) {
dev_warn(&php_slot->pdev->dev, "Error %d applying changeset\n",
ret);
goto destroy_changeset;
}
/* Add device node firmware data */
pnv_php_add_pdns(php_slot);
php_slot->fdt = fdt;
php_slot->dt = dt;
kfree(fdt1);
goto out;
destroy_changeset:
of_changeset_destroy(&php_slot->ocs);
free_dt:
kfree(dt);
php_slot->dn->child = NULL;
free_fdt:
kfree(fdt);
free_fdt1:
kfree(fdt1);
out:
return ret;
}
int pnv_php_set_slot_power_state(struct hotplug_slot *slot,
uint8_t state)
{
struct pnv_php_slot *php_slot = slot->private;
struct opal_msg msg;
int ret;
ret = pnv_pci_set_power_state(php_slot->id, state, &msg);
if (likely(ret > 0)) {
if (be64_to_cpu(msg.params[1]) != php_slot->dn->phandle ||
be64_to_cpu(msg.params[2]) != state ||
be64_to_cpu(msg.params[3]) != OPAL_SUCCESS) {
dev_warn(&php_slot->pdev->dev, "Wrong msg (%lld, %lld, %lld)\n",
be64_to_cpu(msg.params[1]),
be64_to_cpu(msg.params[2]),
be64_to_cpu(msg.params[3]));
return -ENOMSG;
}
} else if (unlikely(ret < 0)) {
dev_warn(&php_slot->pdev->dev, "Error %d powering %s\n",
ret, (state == OPAL_PCI_SLOT_POWER_ON) ? "on" : "off");
return ret;
}
if (state == OPAL_PCI_SLOT_POWER_OFF || state == OPAL_PCI_SLOT_OFFLINE)
pnv_php_rmv_devtree(php_slot);
else
ret = pnv_php_add_devtree(php_slot);
return ret;
}
EXPORT_SYMBOL_GPL(pnv_php_set_slot_power_state);
static int pnv_php_get_power_state(struct hotplug_slot *slot, u8 *state)
{
struct pnv_php_slot *php_slot = slot->private;
uint8_t power_state = OPAL_PCI_SLOT_POWER_ON;
int ret;
/*
* Retrieve power status from firmware. If we fail
* getting that, the power status fails back to
* be on.
*/
ret = pnv_pci_get_power_state(php_slot->id, &power_state);
if (unlikely(ret)) {
dev_warn(&php_slot->pdev->dev, "Error %d getting power status\n",
ret);
} else {
*state = power_state;
slot->info->power_status = power_state;
}
return 0;
}
static int pnv_php_get_adapter_state(struct hotplug_slot *slot, u8 *state)
{
struct pnv_php_slot *php_slot = slot->private;
uint8_t presence = OPAL_PCI_SLOT_EMPTY;
int ret;
/*
* Retrieve presence status from firmware. If we can't
* get that, it will fail back to be empty.
*/
ret = pnv_pci_get_presence_state(php_slot->id, &presence);
if (likely(ret >= 0)) {
*state = presence;
slot->info->adapter_status = presence;
ret = 0;
} else {
dev_warn(&php_slot->pdev->dev, "Error %d getting presence\n",
ret);
}
return ret;
}
static int pnv_php_set_attention_state(struct hotplug_slot *slot, u8 state)
{
/* FIXME: Make it real once firmware supports it */
slot->info->attention_status = state;
return 0;
}
static int pnv_php_enable(struct pnv_php_slot *php_slot, bool rescan)
{
struct hotplug_slot *slot = &php_slot->slot;
uint8_t presence = OPAL_PCI_SLOT_EMPTY;
uint8_t power_status = OPAL_PCI_SLOT_POWER_ON;
int ret;
/* Check if the slot has been configured */
if (php_slot->state != PNV_PHP_STATE_REGISTERED)
return 0;
/* Retrieve slot presence status */
ret = pnv_php_get_adapter_state(slot, &presence);
if (unlikely(ret))
return ret;
/* Proceed if there have nothing behind the slot */
if (presence == OPAL_PCI_SLOT_EMPTY)
goto scan;
/*
* If the power supply to the slot is off, we can't detect
* adapter presence state. That means we have to turn the
* slot on before going to probe slot's presence state.
*
* On the first time, we don't change the power status to
* boost system boot with assumption that the firmware
* supplies consistent slot power status: empty slot always
* has its power off and non-empty slot has its power on.
*/
if (!php_slot->power_state_check) {
php_slot->power_state_check = true;
ret = pnv_php_get_power_state(slot, &power_status);
if (unlikely(ret))
return ret;
if (power_status != OPAL_PCI_SLOT_POWER_ON)
return 0;
}
/* Check the power status. Scan the slot if it is already on */
ret = pnv_php_get_power_state(slot, &power_status);
if (unlikely(ret))
return ret;
if (power_status == OPAL_PCI_SLOT_POWER_ON)
goto scan;
/* Power is off, turn it on and then scan the slot */
ret = pnv_php_set_slot_power_state(slot, OPAL_PCI_SLOT_POWER_ON);
if (unlikely(ret))
return ret;
scan:
if (presence == OPAL_PCI_SLOT_PRESENT) {
if (rescan) {
pci_lock_rescan_remove();
pci_hp_add_devices(php_slot->bus);
pci_unlock_rescan_remove();
}
/* Rescan for child hotpluggable slots */
php_slot->state = PNV_PHP_STATE_POPULATED;
if (rescan)
pnv_php_register(php_slot->dn);
} else {
php_slot->state = PNV_PHP_STATE_POPULATED;
}
return 0;
}
static int pnv_php_enable_slot(struct hotplug_slot *slot)
{
struct pnv_php_slot *php_slot = container_of(slot,
struct pnv_php_slot, slot);
return pnv_php_enable(php_slot, true);
}
static int pnv_php_disable_slot(struct hotplug_slot *slot)
{
struct pnv_php_slot *php_slot = slot->private;
int ret;
if (php_slot->state != PNV_PHP_STATE_POPULATED)
return 0;
/* Remove all devices behind the slot */
pci_lock_rescan_remove();
pci_hp_remove_devices(php_slot->bus);
pci_unlock_rescan_remove();
/* Detach the child hotpluggable slots */
pnv_php_unregister(php_slot->dn);
/* Notify firmware and remove device nodes */
ret = pnv_php_set_slot_power_state(slot, OPAL_PCI_SLOT_POWER_OFF);
php_slot->state = PNV_PHP_STATE_REGISTERED;
return ret;
}
static struct hotplug_slot_ops php_slot_ops = {
.get_power_status = pnv_php_get_power_state,
.get_adapter_status = pnv_php_get_adapter_state,
.set_attention_status = pnv_php_set_attention_state,
.enable_slot = pnv_php_enable_slot,
.disable_slot = pnv_php_disable_slot,
};
static void pnv_php_release(struct hotplug_slot *slot)
{
struct pnv_php_slot *php_slot = slot->private;
unsigned long flags;
/* Remove from global or child list */
spin_lock_irqsave(&pnv_php_lock, flags);
list_del(&php_slot->link);
spin_unlock_irqrestore(&pnv_php_lock, flags);
/* Detach from parent */
pnv_php_put_slot(php_slot);
pnv_php_put_slot(php_slot->parent);
}
static struct pnv_php_slot *pnv_php_alloc_slot(struct device_node *dn)
{
struct pnv_php_slot *php_slot;
struct pci_bus *bus;
const char *label;
uint64_t id;
label = of_get_property(dn, "ibm,slot-label", NULL);
if (unlikely(!label))
return NULL;
if (pnv_pci_get_slot_id(dn, &id))
return NULL;
bus = pci_find_bus_by_node(dn);
if (unlikely(!bus))
return NULL;
php_slot = kzalloc(sizeof(*php_slot), GFP_KERNEL);
if (unlikely(!php_slot))
return NULL;
php_slot->name = kstrdup(label, GFP_KERNEL);
if (unlikely(!php_slot->name)) {
kfree(php_slot);
return NULL;
}
if (likely(dn->child && PCI_DN(dn->child)))
php_slot->slot_no = PCI_SLOT(PCI_DN(dn->child)->devfn);
else
php_slot->slot_no = -1; /* Placeholder slot */
kref_init(&php_slot->kref);
php_slot->state = PNV_PHP_STATE_INITIALIZED;
php_slot->dn = dn;
php_slot->pdev = bus->self;
php_slot->bus = bus;
php_slot->id = id;
php_slot->power_state_check = false;
php_slot->slot.ops = &php_slot_ops;
php_slot->slot.info = &php_slot->slot_info;
php_slot->slot.release = pnv_php_release;
php_slot->slot.private = php_slot;
INIT_LIST_HEAD(&php_slot->children);
INIT_LIST_HEAD(&php_slot->link);
return php_slot;
}
static int pnv_php_register_slot(struct pnv_php_slot *php_slot)
{
struct pnv_php_slot *parent;
struct device_node *dn = php_slot->dn;
unsigned long flags;
int ret;
/* Check if the slot is registered or not */
parent = pnv_php_find_slot(php_slot->dn);
if (unlikely(parent)) {
pnv_php_put_slot(parent);
return -EEXIST;
}
/* Register PCI slot */
ret = pci_hp_register(&php_slot->slot, php_slot->bus,
php_slot->slot_no, php_slot->name);
if (unlikely(ret)) {
dev_warn(&php_slot->pdev->dev, "Error %d registering slot\n",
ret);
return ret;
}
/* Attach to the parent's child list or global list */
while ((dn = of_get_parent(dn))) {
if (!PCI_DN(dn)) {
of_node_put(dn);
break;
}
parent = pnv_php_find_slot(dn);
if (parent) {
of_node_put(dn);
break;
}
of_node_put(dn);
}
spin_lock_irqsave(&pnv_php_lock, flags);
php_slot->parent = parent;
if (parent)
list_add_tail(&php_slot->link, &parent->children);
else
list_add_tail(&php_slot->link, &pnv_php_slot_list);
spin_unlock_irqrestore(&pnv_php_lock, flags);
php_slot->state = PNV_PHP_STATE_REGISTERED;
return 0;
}
static int pnv_php_register_one(struct device_node *dn)
{
struct pnv_php_slot *php_slot;
const __be32 *prop32;
int ret;
/* Check if it's hotpluggable slot */
prop32 = of_get_property(dn, "ibm,slot-pluggable", NULL);
if (!prop32 || !of_read_number(prop32, 1))
return -ENXIO;
prop32 = of_get_property(dn, "ibm,reset-by-firmware", NULL);
if (!prop32 || !of_read_number(prop32, 1))
return -ENXIO;
php_slot = pnv_php_alloc_slot(dn);
if (unlikely(!php_slot))
return -ENODEV;
ret = pnv_php_register_slot(php_slot);
if (unlikely(ret))
goto free_slot;
ret = pnv_php_enable(php_slot, false);
if (unlikely(ret))
goto unregister_slot;
return 0;
unregister_slot:
pnv_php_unregister_one(php_slot->dn);
free_slot:
pnv_php_put_slot(php_slot);
return ret;
}
static void pnv_php_register(struct device_node *dn)
{
struct device_node *child;
/*
* The parent slots should be registered before their
* child slots.
*/
for_each_child_of_node(dn, child) {
pnv_php_register_one(child);
pnv_php_register(child);
}
}
static void pnv_php_unregister_one(struct device_node *dn)
{
struct pnv_php_slot *php_slot;
php_slot = pnv_php_find_slot(dn);
if (!php_slot)
return;
php_slot->state = PNV_PHP_STATE_OFFLINE;
pnv_php_put_slot(php_slot);
pci_hp_deregister(&php_slot->slot);
}
static void pnv_php_unregister(struct device_node *dn)
{
struct device_node *child;
/* The child slots should go before their parent slots */
for_each_child_of_node(dn, child) {
pnv_php_unregister(child);
pnv_php_unregister_one(child);
}
}
static int __init pnv_php_init(void)
{
struct device_node *dn;
pr_info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
for_each_compatible_node(dn, NULL, "ibm,ioda2-phb")
pnv_php_register(dn);
return 0;
}
static void __exit pnv_php_exit(void)
{
struct device_node *dn;
for_each_compatible_node(dn, NULL, "ibm,ioda2-phb")
pnv_php_unregister(dn);
}
module_init(pnv_php_init);
module_exit(pnv_php_exit);
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);

17
drivers/pci/hotplug/rpaphp_slot.c
View file

@ -117,8 +117,10 @@ EXPORT_SYMBOL_GPL(rpaphp_deregister_slot);
int rpaphp_register_slot(struct slot *slot)
{
struct hotplug_slot *php_slot = slot->hotplug_slot;
struct device_node *child;
u32 my_index;
int retval;
int slotno;
int slotno = -1;
dbg("%s registering slot:path[%s] index[%x], name[%s] pdomain[%x] type[%d]\n",
__func__, slot->dn->full_name, slot->index, slot->name,
@ -130,10 +132,15 @@ int rpaphp_register_slot(struct slot *slot)
return -EAGAIN;
}
if (slot->dn->child)
slotno = PCI_SLOT(PCI_DN(slot->dn->child)->devfn);
else
slotno = -1;
for_each_child_of_node(slot->dn, child) {
retval = of_property_read_u32(child, "ibm,my-drc-index", &my_index);
if (my_index == slot->index) {
slotno = PCI_SLOT(PCI_DN(child)->devfn);
of_node_put(child);
break;
}
}
retval = pci_hp_register(php_slot, slot->bus, slotno, slot->name);
if (retval) {
err("pci_hp_register failed with error %d\n", retval);

5
drivers/pci/setup-bus.c
View file

@ -695,11 +695,16 @@ static void __pci_setup_bridge(struct pci_bus *bus, unsigned long type)
pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl);
}
void __weak pcibios_setup_bridge(struct pci_bus *bus, unsigned long type)
{
}
void pci_setup_bridge(struct pci_bus *bus)
{
unsigned long type = IORESOURCE_IO | IORESOURCE_MEM |
IORESOURCE_PREFETCH;
pcibios_setup_bridge(bus, type);
__pci_setup_bridge(bus, type);
}