MIPS: Clean up MIPS MT and CMP configuration options.

This patch accomplishes the following:

  * Clean up wording on all MIPS MT configuration menu items.
  * Simplify and neaten up options selected by MIPS_MT_SMP.
  * Make MIPS_MT_SMTC support as deprecated.
  * Make MIPS_CMP support to depend on MIPS_MT_SMP also.
  * Remove redundant options selected by MIPS_CMP.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6019/

2 files changed, 24 insertions, 40 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 8f519a51585b..5ee558b317ed 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1829,59 +1829,48 @@ choice
         prompt "MIPS MT options"
 
 config MIPS_MT_DISABLED
-        bool "Disable multithreading support."
+        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.
+          Use this option if your platform does not support the MT ASE
+          which is hardware multithreading support. On systems without
+          an MT-enabled processor, this will be the only option that is
+          available in this menu.
 
 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_IRQ_EI
+        select SYNC_R4K
         select MIPS_MT
         select SMP
-        select SYS_SUPPORTS_SCHED_SMT if SMP
-        select SYS_SUPPORTS_SMP
         select SMP_UP
+        select SYS_SUPPORTS_SMP
+        select SYS_SUPPORTS_SCHED_SMT
         select MIPS_PERF_SHARED_TC_COUNTERS
         help
-          This is a kernel model which is known a VSMP but lately has been
-          marketesed into SMVP.
-          Virtual SMP uses the processor's VPEs  to implement virtual
-          processors. In currently available configuration of the 34K processor
-          this allows for a dual processor. Both processors will share the same
-          primary caches; each will obtain the half of the TLB for it's own
-          exclusive use. For a layman this model can be described as similar to
-          what Intel calls Hyperthreading.
-
-          For further information see http://www.linux-mips.org/wiki/34K#VSMP
+          This is a kernel model which is known as SMVP. This is supported
+          on cores with the MT ASE and uses the available VPEs to implement
+          virtual processors which supports SMP. This is equivalent to the
+          Intel Hyperthreading feature. For further information go to
+          <http://www.imgtec.com/mips/mips-multithreading.asp>.
 
 config MIPS_MT_SMTC
-        bool "SMTC: Use all TCs on all VPEs for SMP"
+        bool "Use all TCs on all VPEs for SMP (DEPRECATED)"
         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_IRQ_EI
         select MIPS_MT
-        select NR_CPUS_DEFAULT_8
         select SMP
-        select SYS_SUPPORTS_SMP
         select SMP_UP
+        select SYS_SUPPORTS_SMP
+        select NR_CPUS_DEFAULT_8
         help
-          This is a kernel model which is known a SMTC or lately has been
-          marketesed into SMVP.
-          is presenting the available TC's of the core as processors to Linux.
-          On currently available 34K processors this means a Linux system will
-          see up to 5 processors. The implementation of the SMTC kernel differs
-          significantly from VSMP and cannot efficiently coexist in the same
-          kernel binary so the choice between VSMP and SMTC is a compile time
-          decision.
-
-          For further information see http://www.linux-mips.org/wiki/34K#SMTC
+          This is a kernel model which is known as SMTC. This is
+          supported on cores with the MT ASE and presents all TCs
+          available on all VPEs to support SMP. For further
+          information see <http://www.linux-mips.org/wiki/34K#SMTC>.
 
 endchoice
 
@@ -1958,17 +1947,13 @@ config MIPS_VPE_APSP_API
         help
 
 config MIPS_CMP
-        bool "MIPS CMP framework support"
-        depends on SYS_SUPPORTS_MIPS_CMP
-        select SMP
+        bool "MIPS CMP support"
+        depends on SYS_SUPPORTS_MIPS_CMP && MIPS_MT_SMP
         select SYNC_R4K
-        select SYS_SUPPORTS_SMP
-        select SYS_SUPPORTS_SCHED_SMT if SMP
         select WEAK_ORDERING
         default n
         help
-          This is a placeholder option for the GCMP work. It will need to
-          be handled differently...
+          Enable Coherency Manager processor (CMP) support.
 
 config SB1_PASS_1_WORKAROUNDS
         bool
diff --git a/arch/mips/configs/maltasmvp_defconfig b/arch/mips/configs/maltasmvp_defconfig
index 8a666021b870..d75931850392 100644
--- a/arch/mips/configs/maltasmvp_defconfig
+++ b/arch/mips/configs/maltasmvp_defconfig
@@ -4,7 +4,7 @@ CONFIG_CPU_MIPS32_R2=y
 CONFIG_MIPS_MT_SMP=y
 CONFIG_SCHED_SMT=y
 CONFIG_MIPS_CMP=y
-CONFIG_NR_CPUS=8
+CONFIG_NR_CPUS=2
 CONFIG_HZ_100=y
 CONFIG_LOCALVERSION="cmp"
 CONFIG_SYSVIPC=y
@@ -58,7 +58,6 @@ CONFIG_ATALK=m
 CONFIG_DEV_APPLETALK=m
 CONFIG_IPDDP=m
 CONFIG_IPDDP_ENCAP=y
-CONFIG_IPDDP_DECAP=y
 CONFIG_NET_SCHED=y
 CONFIG_NET_SCH_CBQ=m
 CONFIG_NET_SCH_HTB=m