PPC_PIN_TLB options are dedicated to the 8xx, move them into
the 8xx Kconfig.
While we are at it, add some text to explain what it does.
Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
---
arch/powerpc/Kconfig | 20 ---------------
arch/powerpc/platforms/8xx/Kconfig | 41 ++++++++++++++++++++++++++++++
2 files changed, 41 insertions(+), 20 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 8324d98728db..f552726c9de2 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -1226,26 +1226,6 @@ config TASK_SIZE
hex "Size of user task space" if TASK_SIZE_BOOL
default "0x80000000" if PPC_8xx
default "0xc0000000"
-
-config PIN_TLB
- bool "Pinned Kernel TLBs (860 ONLY)"
- depends on ADVANCED_OPTIONS && PPC_8xx && \
- !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX
-
-config PIN_TLB_DATA
- bool "Pinned TLB for DATA"
- depends on PIN_TLB
- default y
-
-config PIN_TLB_IMMR
- bool "Pinned TLB for IMMR"
- depends on PIN_TLB || PPC_EARLY_DEBUG_CPM
- default y
-
-config PIN_TLB_TEXT
- bool "Pinned TLB for TEXT"
- depends on PIN_TLB
- default y
endmenu
if PPC64
diff --git a/arch/powerpc/platforms/8xx/Kconfig
b/arch/powerpc/platforms/8xx/Kconfig
index b37de62d7e7f..0d036cd868ef 100644
--- a/arch/powerpc/platforms/8xx/Kconfig
+++ b/arch/powerpc/platforms/8xx/Kconfig
@@ -162,4 +162,45 @@ config UCODE_PATCH
default y
depends on !NO_UCODE_PATCH
+menu "8xx advanced setup"
+ depends on PPC_8xx
+
+config PIN_TLB
+ bool "Pinned Kernel TLBs"
+ depends on ADVANCED_OPTIONS && !DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX
+ help
+ On the 8xx, we have 32 instruction TLBs and 32 data TLBs. In each
+ table 4 TLBs can be pinned.
+
+ It reduces the amount of usable TLBs to 28 (ie by 12%). That's the
+ reason why we make it selectable.
+
+ This option does nothing, it just activate the selection of what
+ to pin.
+
+config PIN_TLB_DATA
+ bool "Pinned TLB for DATA"
+ depends on PIN_TLB
+ default y
+ help
+ This pins the first 32 Mbytes of memory with 8M pages.
+
+config PIN_TLB_IMMR
+ bool "Pinned TLB for IMMR"
+ depends on PIN_TLB || PPC_EARLY_DEBUG_CPM
+ default y
+ help
+ This pins the IMMR area with a 512kbytes page. In case
+ CONFIG_PIN_TLB_DATA is also selected, it will reduce
+ CONFIG_PIN_TLB_DATA to 24 Mbytes.
+
+config PIN_TLB_TEXT
+ bool "Pinned TLB for TEXT"
+ depends on PIN_TLB
+ default y
+ help
+ This pins kernel text with 8M pages.
+
+endmenu
+
endmenu
--
2.25.0
