This is a note to let you know that I've just added the patch titled
x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklist
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-speculation-remove-skylake-c2-from-speculation-control-microcode-blacklist.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e3b3121fa8da94cb20f9e0c64ab7981ae47fd085 Mon Sep 17 00:00:00 2001
From: Alexander Sergeyev <sergeev917@xxxxxxxxx>
Date: Tue, 13 Mar 2018 22:38:56 +0300
Subject: x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklist
From: Alexander Sergeyev <sergeev917@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Jia Zhang <qianyue.zj@xxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Kyle Huey <me@xxxxxxxxxxxx>
Cc: David Woodhouse <dwmw@xxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20180313193856.GA8580@localhost.localdomain
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -64,7 +64,7 @@ void check_mpx_erratum(struct cpuinfo_x8
/*
* 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
@@ -82,7 +82,6 @@ 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 },
Patches currently in stable-queue which might be from sergeev917@xxxxxxxxx are
queue-4.9/x86-speculation-remove-skylake-c2-from-speculation-control-microcode-blacklist.patch