[PATCH] x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklist

[Alexander Sergeyev]

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

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index b862067bb33c..3f8d7a3b6447 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -105,7 +105,7 @@ static void probe_xeon_phi_r3mwait(struct cpuinfo_x86 *c)
/*
 * 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 spectre_bad_microcodes[] = {
	{ 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 },
--
2.16.1