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    Subject[PATCH 4.14 09/41] x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklist
    Date
    4.14-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Alexander Sergeyev <sergeev917@gmail.com>

    commit e3b3121fa8da94cb20f9e0c64ab7981ae47fd085 upstream.

    In accordance with Intel's microcode revision guidance from March 6 MCU
    rev 0xc2 is cleared on both Skylake H/S and Skylake Xeon E3 processors
    that 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
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/x86/kernel/cpu/intel.c | 3 +--
    1 file changed, 1 insertion(+), 2 deletions(-)

    --- a/arch/x86/kernel/cpu/intel.c
    +++ b/arch/x86/kernel/cpu/intel.c
    @@ -105,7 +105,7 @@ static void probe_xeon_phi_r3mwait(struc
    /*
    * Early microcode releases for the Spectre v2 mitigation were broken.
    * Information taken from;
    - * - https://newsroom.intel.com/wp-content/uploads/sites/11/2018/01/microcode-update-guidance.pdf
    + * - https://newsroom.intel.com/wp-content/uploads/sites/11/2018/03/microcode-update-guidance.pdf
    * - https://kb.vmware.com/s/article/52345
    * - Microcode revisions observed in the wild
    * - Release note from 20180108 microcode release
    @@ -123,7 +123,6 @@ static const struct sku_microcode spectr
    { INTEL_FAM6_KABYLAKE_MOBILE, 0x09, 0x80 },
    { INTEL_FAM6_SKYLAKE_X, 0x03, 0x0100013e },
    { INTEL_FAM6_SKYLAKE_X, 0x04, 0x0200003c },
    - { INTEL_FAM6_SKYLAKE_DESKTOP, 0x03, 0xc2 },
    { INTEL_FAM6_BROADWELL_CORE, 0x04, 0x28 },
    { INTEL_FAM6_BROADWELL_GT3E, 0x01, 0x1b },
    { INTEL_FAM6_BROADWELL_XEON_D, 0x02, 0x14 },

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