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authorChristophe Leroy <christophe.leroy@csgroup.eu>2020-09-29 09:48:33 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2020-10-08 13:17:13 +0300
commite42a64002a507bf61e57106ed5323b1854371563 (patch)
tree66252763619c5f31b60dcee726b10a9bcb96f971
parentca1d3443b4dd1e8f152bd6c881ddb3eb2996179a (diff)
downloadlinux-e42a64002a507bf61e57106ed5323b1854371563.tar.xz
powerpc: Remove CONFIG_PPC601_SYNC_FIX
This config option isn't in any defconfig. The very first versions of Powerpc 601 have a bug which requires additional sync before and/or after some instructions. This was more than 25 years ago and time has come to retire those buggy versions of the 601 from the kernel. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/55b46bff16705b1ae7bf0a60ccd522b1010ebf75.1601362098.git.christophe.leroy@csgroup.eu
-rw-r--r--arch/powerpc/include/asm/ppc_asm.h6
-rw-r--r--arch/powerpc/platforms/Kconfig15
2 files changed, 0 insertions, 21 deletions
diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
index b4cc6608131c..0b9dc814b81c 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -382,15 +382,9 @@ n:
#endif
/* various errata or part fixups */
-#ifdef CONFIG_PPC601_SYNC_FIX
-#define SYNC sync; isync
-#define SYNC_601 sync
-#define ISYNC_601 isync
-#else
#define SYNC
#define SYNC_601
#define ISYNC_601
-#endif
#if defined(CONFIG_PPC_CELL) || defined(CONFIG_PPC_FSL_BOOK3E)
#define MFTB(dest) \
diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
index b439b027a42f..7a5e8f4541e3 100644
--- a/arch/powerpc/platforms/Kconfig
+++ b/arch/powerpc/platforms/Kconfig
@@ -199,21 +199,6 @@ source "drivers/cpuidle/Kconfig"
endmenu
-config PPC601_SYNC_FIX
- bool "Workarounds for PPC601 bugs"
- depends on PPC_BOOK3S_601 && PPC_PMAC
- default y
- help
- Some versions of the PPC601 (the first PowerPC chip) have bugs which
- mean that extra synchronization instructions are required near
- certain instructions, typically those that make major changes to the
- CPU state. These extra instructions reduce performance slightly.
- If you say N here, these extra instructions will not be included,
- resulting in a kernel which will run faster but may not run at all
- on some systems with the PPC601 chip.
-
- If in doubt, say Y here.
-
config TAU
bool "On-chip CPU temperature sensor support"
depends on PPC_BOOK3S_32