diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0007-x86-speculation-Remove-Skylake-C2-from-Speculation-C.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0007-x86-speculation-Remove-Skylake-C2-from-Speculation-C.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0007-x86-speculation-Remove-Skylake-C2-from-Speculation-C.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0007-x86-speculation-Remove-Skylake-C2-from-Speculation-C.patch new file mode 100644 index 00000000..4da48ef5 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.9.21/0007-x86-speculation-Remove-Skylake-C2-from-Speculation-C.patch @@ -0,0 +1,48 @@ +From 5516ae4d16ab0ce922de31fec20d5d5e198aa258 Mon Sep 17 00:00:00 2001 +From: Alexander Sergeyev <sergeev917@gmail.com> +Date: Tue, 13 Mar 2018 22:38:56 +0300 +Subject: [PATCH 07/93] x86/speculation: Remove Skylake C2 from Speculation + Control microcode blacklist + +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(-) + +diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c +index 7680425..8fb1d65 100644 +--- a/arch/x86/kernel/cpu/intel.c ++++ b/arch/x86/kernel/cpu/intel.c +@@ -64,7 +64,7 @@ void check_mpx_erratum(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 +@@ -82,7 +82,6 @@ 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 }, +-- +2.7.4 + |