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linux/arch/powerpc/Kconfig.debug
Linus Torvalds 5b0e2cb020 powerpc updates for 4.15 
Non-highlights:
 
  - Five fixes for the >128T address space handling, both to fix bugs in our
    implementation and to bring the semantics exactly into line with x86.
 
 Highlights:
 
  - Support for a new OPAL call on bare metal machines which gives us a true NMI
    (ie. is not masked by MSR[EE]=0) for debugging etc.
 
  - Support for Power9 DD2 in the CXL driver.
 
  - Improvements to machine check handling so that uncorrectable errors can be
    reported into the generic memory_failure() machinery.
 
  - Some fixes and improvements for VPHN, which is used under PowerVM to notify
    the Linux partition of topology changes.
 
  - Plumbing to enable TM (transactional memory) without suspend on some Power9
    processors (PPC_FEATURE2_HTM_NO_SUSPEND).
 
  - Support for emulating vector loads form cache-inhibited memory, on some
    Power9 revisions.
 
  - Disable the fast-endian switch "syscall" by default (behind a CONFIG), we
    believe it has never had any users.
 
  - A major rework of the API drivers use when initiating and waiting for long
    running operations performed by OPAL firmware, and changes to the
    powernv_flash driver to use the new API.
 
  - Several fixes for the handling of FP/VMX/VSX while processes are using
    transactional memory.
 
  - Optimisations of TLB range flushes when using the radix MMU on Power9.
 
  - Improvements to the VAS facility used to access coprocessors on Power9, and
    related improvements to the way the NX crypto driver handles requests.
 
  - Implementation of PMEM_API and UACCESS_FLUSHCACHE for 64-bit.
 
 Thanks to:
   Alexey Kardashevskiy, Alistair Popple, Allen Pais, Andrew Donnellan, Aneesh
   Kumar K.V, Arnd Bergmann, Balbir Singh, Benjamin Herrenschmidt, Breno Leitao,
   Christophe Leroy, Christophe Lombard, Cyril Bur, Frederic Barrat, Gautham R.
   Shenoy, Geert Uytterhoeven, Guilherme G. Piccoli, Gustavo Romero, Haren
   Myneni, Joel Stanley, Kamalesh Babulal, Kautuk Consul, Markus Elfring, Masami
   Hiramatsu, Michael Bringmann, Michael Neuling, Michal Suchanek, Naveen N. Rao,
   Nicholas Piggin, Oliver O'Halloran, Paul Mackerras, Pedro Miraglia Franco de
   Carvalho, Philippe Bergheaud, Sandipan Das, Seth Forshee, Shriya, Stephen
   Rothwell, Stewart Smith, Sukadev Bhattiprolu, Tyrel Datwyler, Vaibhav Jain,
   Vaidyanathan Srinivasan, William A. Kennington III.
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Merge tag 'powerpc-4.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "A bit of a small release, I suspect in part due to me travelling for
  KS. But my backlog of patches to review is smaller than usual, so I
  think in part folks just didn't send as much this cycle.

  Non-highlights:

   - Five fixes for the >128T address space handling, both to fix bugs
     in our implementation and to bring the semantics exactly into line
     with x86.

  Highlights:

   - Support for a new OPAL call on bare metal machines which gives us a
     true NMI (ie. is not masked by MSR[EE]=0) for debugging etc.

   - Support for Power9 DD2 in the CXL driver.

   - Improvements to machine check handling so that uncorrectable errors
     can be reported into the generic memory_failure() machinery.

   - Some fixes and improvements for VPHN, which is used under PowerVM
     to notify the Linux partition of topology changes.

   - Plumbing to enable TM (transactional memory) without suspend on
     some Power9 processors (PPC_FEATURE2_HTM_NO_SUSPEND).

   - Support for emulating vector loads form cache-inhibited memory, on
     some Power9 revisions.

   - Disable the fast-endian switch "syscall" by default (behind a
     CONFIG), we believe it has never had any users.

   - A major rework of the API drivers use when initiating and waiting
     for long running operations performed by OPAL firmware, and changes
     to the powernv_flash driver to use the new API.

   - Several fixes for the handling of FP/VMX/VSX while processes are
     using transactional memory.

   - Optimisations of TLB range flushes when using the radix MMU on
     Power9.

   - Improvements to the VAS facility used to access coprocessors on
     Power9, and related improvements to the way the NX crypto driver
     handles requests.

   - Implementation of PMEM_API and UACCESS_FLUSHCACHE for 64-bit.

  Thanks to: Alexey Kardashevskiy, Alistair Popple, Allen Pais, Andrew
  Donnellan, Aneesh Kumar K.V, Arnd Bergmann, Balbir Singh, Benjamin
  Herrenschmidt, Breno Leitao, Christophe Leroy, Christophe Lombard,
  Cyril Bur, Frederic Barrat, Gautham R. Shenoy, Geert Uytterhoeven,
  Guilherme G. Piccoli, Gustavo Romero, Haren Myneni, Joel Stanley,
  Kamalesh Babulal, Kautuk Consul, Markus Elfring, Masami Hiramatsu,
  Michael Bringmann, Michael Neuling, Michal Suchanek, Naveen N. Rao,
  Nicholas Piggin, Oliver O'Halloran, Paul Mackerras, Pedro Miraglia
  Franco de Carvalho, Philippe Bergheaud, Sandipan Das, Seth Forshee,
  Shriya, Stephen Rothwell, Stewart Smith, Sukadev Bhattiprolu, Tyrel
  Datwyler, Vaibhav Jain, Vaidyanathan Srinivasan, and William A.
  Kennington III"

* tag 'powerpc-4.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (151 commits)
  powerpc/64s: Fix Power9 DD2.0 workarounds by adding DD2.1 feature
  powerpc/64s: Fix masking of SRR1 bits on instruction fault
  powerpc/64s: mm_context.addr_limit is only used on hash
  powerpc/64s/radix: Fix 128TB-512TB virtual address boundary case allocation
  powerpc/64s/hash: Allow MAP_FIXED allocations to cross 128TB boundary
  powerpc/64s/hash: Fix fork() with 512TB process address space
  powerpc/64s/hash: Fix 128TB-512TB virtual address boundary case allocation
  powerpc/64s/hash: Fix 512T hint detection to use >= 128T
  powerpc: Fix DABR match on hash based systems
  powerpc/signal: Properly handle return value from uprobe_deny_signal()
  powerpc/fadump: use kstrtoint to handle sysfs store
  powerpc/lib: Implement UACCESS_FLUSHCACHE API
  powerpc/lib: Implement PMEM API
  powerpc/powernv/npu: Don't explicitly flush nmmu tlb
  powerpc/powernv/npu: Use flush_all_mm() instead of flush_tlb_mm()
  powerpc/powernv/idle: Round up latency and residency values
  powerpc/kprobes: refactor kprobe_lookup_name for safer string operations
  powerpc/kprobes: Blacklist emulate_update_regs() from kprobes
  powerpc/kprobes: Do not disable interrupts for optprobes and kprobes_on_ftrace
  powerpc/kprobes: Disable preemption before invoking probe handler for optprobes
  ...
2017-11-16 12:47:46 -08:00

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# SPDX-License-Identifier: GPL-2.0
menu "Kernel hacking"
source "lib/Kconfig.debug"
config PPC_DISABLE_WERROR
bool "Don't build arch/powerpc code with -Werror"
default n
help
This option tells the compiler NOT to build the code under
arch/powerpc with the -Werror flag (which means warnings
are treated as errors).
Only enable this if you are hitting a build failure in the
arch/powerpc code caused by a warning, and you don't feel
inclined to fix it.
config PPC_WERROR
bool
depends on !PPC_DISABLE_WERROR
default y
config PRINT_STACK_DEPTH
int "Stack depth to print" if DEBUG_KERNEL
default 64
help
This option allows you to set the stack depth that the kernel
prints in stack traces. This can be useful if your display is
too small and stack traces cause important information to
scroll off the screen.
config HCALL_STATS
bool "Hypervisor call instrumentation"
depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
help
Adds code to keep track of the number of hypervisor calls made and
the amount of time spent in hypervisor calls. Wall time spent in
each call is always calculated, and if available CPU cycles spent
are also calculated. A directory named hcall_inst is added at the
root of the debugfs filesystem. Within the hcall_inst directory
are files that contain CPU specific call statistics.
This option will add a small amount of overhead to all hypervisor
calls.
config PPC_EMULATED_STATS
bool "Emulated instructions tracking"
depends on DEBUG_FS
help
Adds code to keep track of the number of instructions that are
emulated by the in-kernel emulator. Counters for the various classes
of emulated instructions are available under
powerpc/emulated_instructions/ in the root of the debugfs file
system. Optionally (controlled by
powerpc/emulated_instructions/do_warn in debugfs), rate-limited
warnings can be printed to the console when instructions are
emulated.
config CODE_PATCHING_SELFTEST
bool "Run self-tests of the code-patching code"
depends on DEBUG_KERNEL
default n
config JUMP_LABEL_FEATURE_CHECKS
bool "Enable use of jump label for cpu/mmu_has_feature()"
depends on JUMP_LABEL
default y
help
Selecting this options enables use of jump labels for some internal
feature checks. This should generate more optimal code for those
checks.
config JUMP_LABEL_FEATURE_CHECK_DEBUG
bool "Do extra check on feature fixup calls"
depends on DEBUG_KERNEL && JUMP_LABEL_FEATURE_CHECKS
default n
help
This tries to catch incorrect usage of cpu_has_feature() and
mmu_has_feature() in the code.
If you don't know what this means, say N.
config FTR_FIXUP_SELFTEST
bool "Run self-tests of the feature-fixup code"
depends on DEBUG_KERNEL
default n
config MSI_BITMAP_SELFTEST
bool "Run self-tests of the MSI bitmap code"
depends on DEBUG_KERNEL
default n
config XMON
bool "Include xmon kernel debugger"
depends on DEBUG_KERNEL
help
Include in-kernel hooks for the xmon kernel monitor/debugger.
Unless you are intending to debug the kernel, say N here.
Make sure to enable also CONFIG_BOOTX_TEXT on Macs. Otherwise
nothing will appear on the screen (xmon writes directly to the
framebuffer memory).
The cmdline option 'xmon' or 'xmon=early' will drop into xmon
very early during boot. 'xmon=on' will just enable the xmon
debugger hooks. 'xmon=off' will disable the debugger hooks
if CONFIG_XMON_DEFAULT is set.
xmon will print a backtrace on the very first invocation.
'xmon=nobt' will disable this autobacktrace.
config XMON_DEFAULT
bool "Enable xmon by default"
depends on XMON
help
xmon is normally disabled unless booted with 'xmon=on'.
Use 'xmon=off' to disable xmon init during runtime.
config XMON_DISASSEMBLY
bool "Include disassembly support in xmon"
depends on XMON
default y
help
Include support for disassembling in xmon. You probably want
to say Y here, unless you're building for a memory-constrained
system.
config DEBUGGER
bool
depends on KGDB || XMON
default y
config BDI_SWITCH
bool "Include BDI-2000 user context switcher"
depends on DEBUG_KERNEL && PPC32
help
Include in-kernel support for the Abatron BDI2000 debugger.
Unless you are intending to debug the kernel with one of these
machines, say N here.
config BOOTX_TEXT
bool "Support for early boot text console (BootX or OpenFirmware only)"
depends on PPC_BOOK3S
help
Say Y here to see progress messages from the boot firmware in text
mode. Requires either BootX or Open Firmware.
config PPC_EARLY_DEBUG
bool "Early debugging (dangerous)"
help
Say Y to enable some early debugging facilities that may be available
for your processor/board combination. Those facilities are hacks
intended to debug problems early during boot, this should not be
enabled in a production kernel.
Note that enabling this will also cause the kernel default log level
to be pushed to max automatically very early during boot
choice
prompt "Early debugging console"
depends on PPC_EARLY_DEBUG
help
Use the selected console for early debugging. Careful, if you
enable debugging for the wrong type of machine your kernel
_will not boot_.
config PPC_EARLY_DEBUG_BOOTX
bool "BootX or OpenFirmware"
depends on BOOTX_TEXT
help
Select this to enable early debugging for a machine using BootX
or OpenFirmware.
config PPC_EARLY_DEBUG_LPAR
bool "LPAR HV Console"
depends on PPC_PSERIES && HVC_CONSOLE
help
Select this to enable early debugging for a machine with a HVC
console on vterm 0.
config PPC_EARLY_DEBUG_LPAR_HVSI
bool "LPAR HVSI Console"
depends on PPC_PSERIES && HVC_CONSOLE
help
Select this to enable early debugging for a machine with a HVSI
console on a specified vterm.
config PPC_EARLY_DEBUG_G5
bool "Apple G5"
depends on PPC_PMAC64
help
Select this to enable early debugging for Apple G5 machines.
config PPC_EARLY_DEBUG_RTAS_PANEL
bool "RTAS Panel"
depends on PPC_RTAS
help
Select this to enable early debugging via the RTAS panel.
config PPC_EARLY_DEBUG_RTAS_CONSOLE
bool "RTAS Console"
depends on PPC_RTAS
select UDBG_RTAS_CONSOLE
help
Select this to enable early debugging via the RTAS console.
config PPC_EARLY_DEBUG_MAPLE
bool "Maple real mode"
depends on PPC_MAPLE
help
Select this to enable early debugging for Maple.
config PPC_EARLY_DEBUG_PAS_REALMODE
bool "PA Semi real mode"
depends on PPC_PASEMI
help
Select this to enable early debugging for PA Semi.
Output will be on UART0.
config PPC_EARLY_DEBUG_44x
bool "Early serial debugging for IBM/AMCC 44x CPUs"
depends on 44x
help
Select this to enable early debugging for IBM 44x chips via the
inbuilt serial port. If you enable this, ensure you set
PPC_EARLY_DEBUG_44x_PHYSLOW below to suit your target board.
config PPC_EARLY_DEBUG_40x
bool "Early serial debugging for IBM/AMCC 40x CPUs"
depends on 40x
help
Select this to enable early debugging for IBM 40x chips via the
inbuilt serial port. This works on chips with a 16550 compatible
UART. Xilinx chips with uartlite cannot use this option.
config PPC_EARLY_DEBUG_CPM
bool "Early serial debugging for Freescale CPM-based serial ports"
depends on SERIAL_CPM
help
Select this to enable early debugging for Freescale chips
using a CPM-based serial port. This assumes that the bootwrapper
has run, and set up the CPM in a particular way.
config PPC_EARLY_DEBUG_USBGECKO
bool "Early debugging through the USB Gecko adapter"
depends on GAMECUBE_COMMON
select USBGECKO_UDBG
help
Select this to enable early debugging for Nintendo GameCube/Wii
consoles via an external USB Gecko adapter.
config PPC_EARLY_DEBUG_PS3GELIC
bool "Early debugging through the PS3 Ethernet port"
depends on PPC_PS3
select PS3GELIC_UDBG
help
Select this to enable early debugging for the PlayStation3 via
UDP broadcasts sent out through the Ethernet port.
config PPC_EARLY_DEBUG_OPAL_RAW
bool "OPAL raw console"
depends on HVC_OPAL
help
Select this to enable early debugging for the PowerNV platform
using a "raw" console
config PPC_EARLY_DEBUG_OPAL_HVSI
bool "OPAL hvsi console"
depends on HVC_OPAL
help
Select this to enable early debugging for the PowerNV platform
using an "hvsi" console
config PPC_EARLY_DEBUG_MEMCONS
bool "In memory console"
help
Select this to enable early debugging using an in memory console.
This console provides input and output buffers stored within the
kernel BSS and should be safe to select on any system. A debugger
can then be used to read kernel output or send input to the console.
endchoice
config PPC_MEMCONS_OUTPUT_SIZE
int "In memory console output buffer size"
depends on PPC_EARLY_DEBUG_MEMCONS
default 4096
help
Selects the size of the output buffer (in bytes) of the in memory
console.
config PPC_MEMCONS_INPUT_SIZE
int "In memory console input buffer size"
depends on PPC_EARLY_DEBUG_MEMCONS
default 128
help
Selects the size of the input buffer (in bytes) of the in memory
console.
config PPC_EARLY_DEBUG_OPAL
def_bool y
depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
config PPC_EARLY_DEBUG_HVSI_VTERMNO
hex "vterm number to use with early debug HVSI"
depends on PPC_EARLY_DEBUG_LPAR_HVSI
default "0x30000000"
help
You probably want 0x30000000 for your first serial port and
0x30000001 for your second one
config PPC_EARLY_DEBUG_OPAL_VTERMNO
hex "vterm number to use with OPAL early debug"
depends on PPC_EARLY_DEBUG_OPAL
default "0"
help
This correspond to which /dev/hvcN you want to use for early
debug.
On OPAL v2, this will be 0 for network console and 1 or 2 for
the machine built-in serial ports.
config PPC_EARLY_DEBUG_44x_PHYSLOW
hex "Low 32 bits of early debug UART physical address"
depends on PPC_EARLY_DEBUG_44x
default "0x40000200"
help
You probably want 0x40000200 for ebony boards and
0x40000300 for taishan
config PPC_EARLY_DEBUG_44x_PHYSHIGH
hex "EPRN of early debug UART physical address"
depends on PPC_EARLY_DEBUG_44x
default "0x1"
config PPC_EARLY_DEBUG_40x_PHYSADDR
hex "Early debug UART physical address"
depends on PPC_EARLY_DEBUG_40x
default "0xef600300"
config PPC_EARLY_DEBUG_CPM_ADDR
hex "CPM UART early debug transmit descriptor address"
depends on PPC_EARLY_DEBUG_CPM
default "0xfa202008" if PPC_EP88XC
default "0xf0001ff8" if CPM2
default "0xff002008" if CPM1
help
This specifies the address of the transmit descriptor
used for early debug output. Because it is needed before
platform probing is done, all platforms selected must
share the same address.
config FAIL_IOMMU
bool "Fault-injection capability for IOMMU"
depends on FAULT_INJECTION
help
Provide fault-injection capability for IOMMU. Each device can
be selectively enabled via the fail_iommu property.
If you are unsure, say N.
config PPC_PTDUMP
bool "Export kernel pagetable layout to userspace via debugfs"
depends on DEBUG_KERNEL && DEBUG_FS
help
This option exports the state of the kernel pagetables to a
debugfs file. This is only useful for kernel developers who are
working in architecture specific areas of the kernel - probably
not a good idea to enable this feature in a production kernel.
If you are unsure, say N.
config PPC_HTDUMP
def_bool y
depends on PPC_PTDUMP && PPC_BOOK3S
config PPC_FAST_ENDIAN_SWITCH
bool "Deprecated fast endian-switch syscall"
depends on DEBUG_KERNEL && PPC_BOOK3S_64
help
If you're unsure what this is, say N.
endmenu
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