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| author | Christoph Hellwig <hch@lst.de> | 2018-03-19 11:38:13 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-03-20 10:01:05 +0100 |
| commit | 5927145efd5de71976e62e2822511b13014d7e56 (patch) | |
| tree | 18021521ba0a8c8806cb2750035680d4efeef197 /arch/x86/Kconfig.cpu | |
| parent | c55b8550fa57ba4f5e507be406ff9fc2845713e8 (diff) | |
| download | linux-rpi-5927145efd5de71976e62e2822511b13014d7e56.tar.gz linux-rpi-5927145efd5de71976e62e2822511b13014d7e56.tar.bz2 linux-rpi-5927145efd5de71976e62e2822511b13014d7e56.zip | |
x86/cpu: Remove the CONFIG_X86_PPRO_FENCE=y quirk
There were only a few Pentium Pro multiprocessors systems where this
errata applied. They are more than 20 years old now, and we've slowly
dropped places which put the workarounds in and discouraged anyone
from enabling the workaround.
Get rid of it for good.
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Jon Mason <jdmason@kudzu.us>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Muli Ben-Yehuda <mulix@mulix.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: iommu@lists.linux-foundation.org
Link: http://lkml.kernel.org/r/20180319103826.12853-2-hch@lst.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/Kconfig.cpu')
| -rw-r--r-- | arch/x86/Kconfig.cpu | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu index 65a9a4716e34..f0c5ef578153 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu @@ -315,19 +315,6 @@ config X86_L1_CACHE_SHIFT default "4" if MELAN || M486 || MGEODEGX1 default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX -config X86_PPRO_FENCE - bool "PentiumPro memory ordering errata workaround" - depends on M686 || M586MMX || M586TSC || M586 || M486 || MGEODEGX1 - ---help--- - Old PentiumPro multiprocessor systems had errata that could cause - memory operations to violate the x86 ordering standard in rare cases. - Enabling this option will attempt to work around some (but not all) - occurrences of this problem, at the cost of much heavier spinlock and - memory barrier operations. - - If unsure, say n here. Even distro kernels should think twice before - enabling this: there are few systems, and an unlikely bug. - config X86_F00F_BUG def_bool y depends on M586MMX || M586TSC || M586 || M486 |