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forked fromtorvalds/linux

Commite3b3121

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sergeev917KAGA-KOKO
authored andcommitted
x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklist
In accordance with Intel's microcode revision guidance from March 6 MCUrev 0xc2 is cleared on both Skylake H/S and Skylake Xeon E3 processorsthat share CPUID 506E3.Signed-off-by: Alexander Sergeyev <sergeev917@gmail.com>Signed-off-by: Thomas Gleixner <tglx@linutronix.de>Cc: Jia Zhang <qianyue.zj@alibaba-inc.com>Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>Cc: Kyle Huey <me@kylehuey.com>Cc: David Woodhouse <dwmw@amazon.co.uk>Link:https://lkml.kernel.org/r/20180313193856.GA8580@localhost.localdomain
1 parentaf1d830 commite3b3121

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‎arch/x86/kernel/cpu/intel.c‎

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -105,7 +105,7 @@ static void probe_xeon_phi_r3mwait(struct cpuinfo_x86 *c)
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/*
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* Early microcode releases for the Spectre v2 mitigation were broken.
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* Information taken from;
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* - https://newsroom.intel.com/wp-content/uploads/sites/11/2018/01/microcode-update-guidance.pdf
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* - https://newsroom.intel.com/wp-content/uploads/sites/11/2018/03/microcode-update-guidance.pdf
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* - https://kb.vmware.com/s/article/52345
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* - Microcode revisions observed in the wild
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* - Release note from 20180108 microcode release
@@ -123,7 +123,6 @@ static const struct sku_microcode spectre_bad_microcodes[] = {
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{INTEL_FAM6_KABYLAKE_MOBILE,0x09,0x80 },
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{INTEL_FAM6_SKYLAKE_X,0x03,0x0100013e },
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{INTEL_FAM6_SKYLAKE_X,0x04,0x0200003c },
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{INTEL_FAM6_SKYLAKE_DESKTOP,0x03,0xc2 },
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{INTEL_FAM6_BROADWELL_CORE,0x04,0x28 },
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{INTEL_FAM6_BROADWELL_GT3E,0x01,0x1b },
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{INTEL_FAM6_BROADWELL_XEON_D,0x02,0x14 },

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