This option will slow down process creation somewhat.
+config DEBUG_PAGEALLOC
+ bool "Debug page memory allocations"
+ depends on DEBUG_KERNEL && !HIBERNATION
+ help
+ Unmap pages from the kernel linear mapping after free_pages().
+ This results in a large slowdown, but helps to find certain types
+ of memory corruptions.
+
+
config HCALL_STATS
bool "Hypervisor call instrumentation"
depends on PPC_PSERIES && DEBUG_FS
help
Adds code to keep track of the number of hypervisor calls made and
- the amount of time spent in hypervisor callsr. Wall time spent in
+ 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
config IRQSTACKS
bool "Use separate kernel stacks when processing interrupts"
- depends on PPC64
help
If you say Y here the kernel will use separate kernel stacks
for handling hard and soft interrupts. This can help avoid
overflowing the process kernel stacks.
+config VIRQ_DEBUG
+ bool "Expose hardware/virtual IRQ mapping via debugfs"
+ depends on DEBUG_FS && PPC_MERGE
+ help
+ This option will show the mapping relationship between hardware irq
+ numbers and virtual irq numbers. The mapping is exposed via debugfs
+ in the file powerpc/virq_mapping.
+
+ If you don't know what this means you don't need it.
+
config BDI_SWITCH
bool "Include BDI-2000 user context switcher"
depends on DEBUG_KERNEL && PPC32
config BOOTX_TEXT
bool "Support for early boot text console (BootX or OpenFirmware only)"
- depends PPC_OF
+ depends on PPC_OF && PPC_MULTIPLATFORM
help
Say Y here to see progress messages from the boot firmware in text
mode. Requires either BootX or Open Firmware.
-config SERIAL_TEXT_DEBUG
- bool "Support for early boot texts over serial port"
- depends on 4xx || LOPEC || MV64X60 || PPLUS || PRPMC800 || \
- PPC_GEN550 || PPC_MPC52xx
-
config PPC_EARLY_DEBUG
bool "Early debugging (dangerous)"
+ # PPC_EARLY_DEBUG on 440 leaves AS=1 mappings above the TLB high water
+ # mark, which doesn't work with current 440 KVM.
+ depends on !KVM
+ 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"
help
Select this to enable early debugging for Celleb with Beat.
+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
+ select PIN_TLB if PPC_8xx
+ 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.
+
endchoice
+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.
+
endmenu