diff options
Diffstat (limited to 'arch/xtensa/Kconfig')
| -rw-r--r-- | arch/xtensa/Kconfig | 52 |
1 files changed, 47 insertions, 5 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index f8df0cc70cb..ba56e11cbf7 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -9,7 +9,6 @@ config XTENSA select GENERIC_CLOCKEVENTS select VIRT_TO_BUS select GENERIC_IRQ_SHOW - select GENERIC_CPU_DEVICES select GENERIC_SCHED_CLOCK select MODULES_USE_ELF_RELA select GENERIC_PCI_IOMAP @@ -19,6 +18,8 @@ config XTENSA select IRQ_DOMAIN select HAVE_OPROFILE select HAVE_FUNCTION_TRACER + select HAVE_IRQ_TIME_ACCOUNTING + select HAVE_PERF_EVENTS help Xtensa processors are 32-bit RISC machines designed by Tensilica primarily for embedded systems. These processors are both @@ -67,6 +68,9 @@ config VARIANT_IRQ_SWITCH config HAVE_XTENSA_GPIO32 def_bool n +config MAY_HAVE_SMP + def_bool n + menu "Processor type and features" choice @@ -110,6 +114,48 @@ config XTENSA_UNALIGNED_USER source "kernel/Kconfig.preempt" +config HAVE_SMP + bool "System Supports SMP (MX)" + depends on MAY_HAVE_SMP + select XTENSA_MX + help + This option is use to indicate that the system-on-a-chip (SOC) + supports Multiprocessing. Multiprocessor support implemented above + the CPU core definition and currently needs to be selected manually. + + Multiprocessor support in implemented with external cache and + interrupt controlers. + + The MX interrupt distributer adds Interprocessor Interrupts + and causes the IRQ numbers to be increased by 4 for devices + like the open cores ethernet driver and the serial interface. + + You still have to select "Enable SMP" to enable SMP on this SOC. + +config SMP + bool "Enable Symmetric multi-processing support" + depends on HAVE_SMP + select USE_GENERIC_SMP_HELPERS + select GENERIC_SMP_IDLE_THREAD + help + Enabled SMP Software; allows more than one CPU/CORE + to be activated during startup. + +config NR_CPUS + depends on SMP + int "Maximum number of CPUs (2-32)" + range 2 32 + default "4" + +config HOTPLUG_CPU + bool "Enable CPU hotplug support" + depends on SMP + help + Say Y here to allow turning CPUs off and on. CPUs can be + controlled through /sys/devices/system/cpu. + + Say N if you want to disable CPU hotplug. + config MATH_EMULATION bool "Math emulation" help @@ -156,9 +202,6 @@ config XTENSA_CALIBRATE_CCOUNT config SERIAL_CONSOLE def_bool n -config XTENSA_ISS_NETWORK - def_bool n - menu "Bus options" config PCI @@ -185,7 +228,6 @@ config XTENSA_PLATFORM_ISS depends on TTY select XTENSA_CALIBRATE_CCOUNT select SERIAL_CONSOLE - select XTENSA_ISS_NETWORK help ISS is an acronym for Tensilica's Instruction Set Simulator. |