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-rw-r--r--arch/powerpc/platforms/8xx/Kconfig16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/8xx/Kconfig b/arch/powerpc/platforms/8xx/Kconfig
index 8ecd01ad0de8..322b155f24ec 100644
--- a/arch/powerpc/platforms/8xx/Kconfig
+++ b/arch/powerpc/platforms/8xx/Kconfig
@@ -100,6 +100,22 @@ config 8xx_CPU6
If in doubt, say N here.
+config 8xx_CPU15
+ bool "CPU15 Silicon Errata"
+ default y
+ help
+ This enables a workaround for erratum CPU15 on MPC8xx chips.
+ This bug can cause incorrect code execution under certain
+ circumstances. This workaround adds some overhead (a TLB miss
+ every time execution crosses a page boundary), and you may wish
+ to disable it if you have worked around the bug in the compiler
+ (by not placing conditional branches or branches to LR or CTR
+ in the last word of a page, with a target of the last cache
+ line in the next page), or if you have used some other
+ workaround.
+
+ If in doubt, say Y here.
+
choice
prompt "Microcode patch selection"
default NO_UCODE_PATCH
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