[PATCH v3 29/45] powerpc/8xx: Move PPC_PIN_TLB options into 8xx Kconfig
From: Christophe Leroy <hidden>
Date: 2020-05-11 11:26:03
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), linux for powerpc embedded ppc8xx and ppc83xx, the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Christophe Leroy, Linus Torvalds
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 <redacted> --- 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
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2.25.0