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    Subject[PATCH 4.14 048/167] x86/speculation: Update Speculation Control microcode blacklist
    Date
    4.14-stable review patch.  If anyone has any objections, please let me know.

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

    From: David Woodhouse <dwmw@amazon.co.uk>

    commit 1751342095f0d2b36fa8114d8e12c5688c455ac4 upstream.

    Intel have retroactively blessed the 0xc2 microcode on Skylake mobile
    and desktop parts, and the Gemini Lake 0x22 microcode is apparently fine
    too. We blacklisted the latter purely because it was present with all
    the other problematic ones in the 2018-01-08 release, but now it's
    explicitly listed as OK.

    We still list 0x84 for the various Kaby Lake / Coffee Lake parts, as
    that appeared in one version of the blacklist and then reverted to
    0x80 again. We can change it if 0x84 is actually announced to be safe.

    Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
    Cc: Andy Lutomirski <luto@kernel.org>
    Cc: Arjan van de Ven <arjan@linux.intel.com>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Dan Williams <dan.j.williams@intel.com>
    Cc: Dave Hansen <dave.hansen@linux.intel.com>
    Cc: David Woodhouse <dwmw2@infradead.org>
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Cc: Josh Poimboeuf <jpoimboe@redhat.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: arjan.van.de.ven@intel.com
    Cc: jmattson@google.com
    Cc: karahmed@amazon.de
    Cc: kvm@vger.kernel.org
    Cc: pbonzini@redhat.com
    Cc: rkrcmar@redhat.com
    Cc: sironi@amazon.de
    Link: http://lkml.kernel.org/r/1518305967-31356-2-git-send-email-dwmw@amazon.co.uk
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/x86/kernel/cpu/intel.c | 4 ----
    1 file changed, 4 deletions(-)

    --- a/arch/x86/kernel/cpu/intel.c
    +++ b/arch/x86/kernel/cpu/intel.c
    @@ -123,8 +123,6 @@ static const struct sku_microcode spectr
    { INTEL_FAM6_KABYLAKE_MOBILE, 0x09, 0x84 },
    { INTEL_FAM6_SKYLAKE_X, 0x03, 0x0100013e },
    { INTEL_FAM6_SKYLAKE_X, 0x04, 0x0200003c },
    - { INTEL_FAM6_SKYLAKE_MOBILE, 0x03, 0xc2 },
    - { 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 },
    @@ -136,8 +134,6 @@ static const struct sku_microcode spectr
    { INTEL_FAM6_HASWELL_X, 0x02, 0x3b },
    { INTEL_FAM6_HASWELL_X, 0x04, 0x10 },
    { INTEL_FAM6_IVYBRIDGE_X, 0x04, 0x42a },
    - /* Updated in the 20180108 release; blacklist until we know otherwise */
    - { INTEL_FAM6_ATOM_GEMINI_LAKE, 0x01, 0x22 },
    /* Observed in the wild */
    { INTEL_FAM6_SANDYBRIDGE_X, 0x06, 0x61b },
    { INTEL_FAM6_SANDYBRIDGE_X, 0x07, 0x712 },

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