[MIPS] Fix configuration of R2 CPU features and multithreading.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 002845e..05663e5 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -308,6 +308,7 @@
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_LITTLE_ENDIAN
+ select SYS_SUPPORTS_MULTITHREADING if EXPERIMENTAL
help
This enables support for the MIPS Technologies Atlas evaluation
board.
@@ -336,6 +337,7 @@
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_LITTLE_ENDIAN
+ select SYS_SUPPORTS_MULTITHREADING
help
This enables support for the MIPS Technologies Malta evaluation
board.
@@ -1495,34 +1497,57 @@
config CPU_HAS_PREFETCH
bool
-config MIPS_MT
- bool "Enable MIPS MT"
- depends on CPU_MIPS32_R2
- #depends on CPU_MIPS64_R2 # later ...
-
choice
prompt "MIPS MT options"
- depends on MIPS_MT
+
+config MIPS_MT_DISABLED
+ bool "Disable multithreading support."
+ help
+ Use this option if your workload can't take advantage of
+ MIPS hardware multithreading support. On systems that don't have
+ the option of an MT-enabled processor this option will be the only
+ option in this menu.
config MIPS_MT_SMTC
bool "SMTC: Use all TCs on all VPEs for SMP"
+ depends on CPU_MIPS32_R2
+ #depends on CPU_MIPS64_R2 # once there is hardware ...
+ depends on SYS_SUPPORTS_MULTITHREADING
select CPU_MIPSR2_IRQ_VI
select CPU_MIPSR2_SRS
+ select MIPS_MT
select SMP
+ help
+ This is a kernel model which is known a SMTC or lately has been
+ marketesed into SMVP.
config MIPS_MT_SMP
bool "Use 1 TC on each available VPE for SMP"
+ depends on SYS_SUPPORTS_MULTITHREADING
+ select CPU_MIPSR2_IRQ_VI
+ select CPU_MIPSR2_SRS
+ select MIPS_MT
select SMP
+ help
+ This is a kernel model which is also known a VSMP or lately
+ has been marketesed into SMVP.
config MIPS_VPE_LOADER
bool "VPE loader support."
- depends on MIPS_MT
+ depends on SYS_SUPPORTS_MULTITHREADING
+ select MIPS_MT
help
Includes a loader for loading an elf relocatable object
onto another VPE and running it.
endchoice
+config MIPS_MT
+ bool
+
+config SYS_SUPPORTS_MULTITHREADING
+ bool
+
config MIPS_MT_FPAFF
bool "Dynamic FPU affinity for FP-intensive threads"
depends on MIPS_MT
@@ -1579,32 +1604,23 @@
config CPU_HAS_WB
bool
+#
+# Vectored interrupt mode is an R2 feature
+#
config CPU_MIPSR2_IRQ_VI
- bool "Vectored interrupt mode"
- depends on CPU_MIPSR2
- help
- Vectored interrupt mode allowing faster dispatching of interrupts.
- The board support code needs to be written to take advantage of this
- mode. Compatibility code is included to allow the kernel to run on
- a CPU that does not support vectored interrupts. It's safe to
- say Y here.
+ bool
+#
+# Extended interrupt mode is an R2 feature
+#
config CPU_MIPSR2_IRQ_EI
- bool "External interrupt controller mode"
- depends on CPU_MIPSR2
- help
- Extended interrupt mode takes advantage of an external interrupt
- controller to allow fast dispatching from many possible interrupt
- sources. Say N unless you know that external interrupt support is
- required.
+ bool
+#
+# Shadow registers are an R2 feature
+#
config CPU_MIPSR2_SRS
- bool "Make shadow set registers available for interrupt handlers"
- depends on CPU_MIPSR2_IRQ_VI || CPU_MIPSR2_IRQ_EI
- help
- Allow the kernel to use shadow register sets for fast interrupts.
- Interrupt handlers must be specially written to use shadow sets.
- Say N unless you know that shadow register set upport is needed.
+ bool
config CPU_HAS_SYNC
bool