Patch "x86/cpufeatures: Add Intel feature bits for Speculation Control" has been added to the 4.14-stable tree

Patch "x86/cpufeatures: Add Intel feature bits for Speculation Control" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    x86/cpufeatures: Add Intel feature bits for Speculation Control

to the 4.14-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:
     x86cpufeatures_Add_Intel_feature_bits_for_Speculation_Control.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


Subject: x86/cpufeatures: Add Intel feature bits for Speculation Control
From: David Woodhouse dwmw@amazon.co.uk
Date: Thu Jan 25 16:14:10 2018 +0000

From: David Woodhouse dwmw@amazon.co.uk

commit fc67dd70adb711a45d2ef34e12d1a8be75edde61

Add three feature bits exposed by new microcode on Intel CPUs for
speculation control.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: gnomes@lxorguk.ukuu.org.uk
Cc: ak@linux.intel.com
Cc: ashok.raj@intel.com
Cc: dave.hansen@intel.com
Cc: karahmed@amazon.de
Cc: arjan@linux.intel.com
Cc: torvalds@linux-foundation.org
Cc: peterz@infradead.org
Cc: bp@alien8.de
Cc: pbonzini@redhat.com
Cc: tim.c.chen@linux.intel.com
Cc: gregkh@linux-foundation.org
Link: https://lkml.kernel.org/r/1516896855-7642-3-git-send-email-dwmw@amazon.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>


---
 arch/x86/include/asm/cpufeatures.h |    3 +++
 1 file changed, 3 insertions(+)

--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -320,6 +320,9 @@
 /* Intel-defined CPU features, CPUID level 0x00000007:0 (EDX), word 18 */
 #define X86_FEATURE_AVX512_4VNNIW	(18*32+ 2) /* AVX-512 Neural Network Instructions */
 #define X86_FEATURE_AVX512_4FMAPS	(18*32+ 3) /* AVX-512 Multiply Accumulation Single precision */
+#define X86_FEATURE_SPEC_CTRL		(18*32+26) /* Speculation Control (IBRS + IBPB) */
+#define X86_FEATURE_STIBP		(18*32+27) /* Single Thread Indirect Branch Predictors */
+#define X86_FEATURE_ARCH_CAPABILITIES	(18*32+29) /* IA32_ARCH_CAPABILITIES MSR (Intel) */
 
 /*
  * BUG word(s)


Patches currently in stable-queue which might be from dwmw@amazon.co.uk are

queue-4.14/x86pti_Do_not_enable_PTI_on_CPUs_which_are_not_vulnerable_to_Meltdown.patch
queue-4.14/x86cpufeature_Blacklist_SPEC_CTRLPRED_CMD_on_early_Spectre_v2_microcodes.patch
queue-4.14/x86cpufeatures_Add_Intel_feature_bits_for_Speculation_Control.patch
queue-4.14/KVM_VMX_Make_indirect_call_speculation_safe.patch
queue-4.14/x86msr_Add_definitions_for_new_speculation_control_MSRs.patch
queue-4.14/x86cpufeatures_Add_CPUID_7_EDX_CPUID_leaf.patch
queue-4.14/x86retpoline_Remove_the_esprsp_thunk.patch
queue-4.14/x86cpufeatures_Add_AMD_feature_bits_for_Speculation_Control.patch
queue-4.14/x86speculation_Add_basic_IBPB_(Indirect_Branch_Prediction_Barrier)_support.patch
queue-4.14/x86speculation_Simplify_indirect_branch_prediction_barrier().patch
queue-4.14/KVM_x86_Make_indirect_calls_in_emulator_speculation_safe.patch
queue-4.14/x86retpoline_Simplify_vmexit_fill_RSB().patch
queue-4.14/x86cpufeatures_Clean_up_Spectre_v2_related_CPUID_flags.patch