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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-09-29 06:48:33 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-10-08 21:17:13 +1100 |
| commit | e42a64002a507bf61e57106ed5323b1854371563 (patch) | |
| tree | 66252763619c5f31b60dcee726b10a9bcb96f971 | |
| parent | powerpc: Remove SYNC on non 6xx (diff) | |
| download | linux-dev-e42a64002a507bf61e57106ed5323b1854371563.tar.xz linux-dev-e42a64002a507bf61e57106ed5323b1854371563.zip | |
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.h | 6 | ||||
| -rw-r--r-- | arch/powerpc/platforms/Kconfig | 15 |
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 |