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authorRalf Baechle <ralf@linux-mips.org>2010-09-16 11:40:41 +0100
committerRalf Baechle <ralf@linux-mips.org>2010-10-04 18:33:56 +0100
commit25f12b339caea6b3ca750871d8cecbda70fd83c6 (patch)
tree39f6536c9571b877669837326d3830f8a0627311 /arch
parenta2e715a86c6dc85fb4a13c0c818637131de44cd2 (diff)
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MIPS: Kconfig: Fix and clarify kconfig help text for VSMP and SMTC.
Only VSMP was known as SMVP and generally the help text was too short to be helpful. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/Kconfig20
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index ec410009e8f..5526faabfc2 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1647,8 +1647,16 @@ config MIPS_MT_SMP
select SYS_SUPPORTS_SMP
select SMP_UP
help
- This is a kernel model which is also known a VSMP or lately
- has been marketesed into SMVP.
+ 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
config MIPS_MT_SMTC
bool "SMTC: Use all TCs on all VPEs for SMP"
@@ -1665,6 +1673,14 @@ config MIPS_MT_SMTC
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
endchoice