Combining my previous patchset for purely adding the feature and MSR
definitions, with the first four patches that Karim sent out which were
purely about enabling IBPB. This gives us a full retpoline-based
mitigation for Spectre variant 2, and the IBRS option can come later.
I expect further discussion of the final patch to tweak precisely when
we use IBPB in context switch.
---
v2: Fix STIPB/STIBP typo
Fix error in AMD CPUID bit definition (0x8000_0008 EBX[12])
Ashok Raj (1):
x86/kvm: Add IBPB support
David Woodhouse (4):
x86/cpufeatures: Add Intel feature bits for Speculation Control
x86/cpufeatures: Add AMD feature bits for Prediction Command
x86/msr: Add definitions for new speculation control MSRs
x86/pti: Do not enable PTI on fixed Intel processors
Thomas Gleixner (2):
x86/speculation: Add basic support for IBPB
x86/speculation: Use Indirect Branch Prediction Barrier in context
switch
Tim Chen (1):
x86/mm: Only flush indirect branches when switching into non dumpable
process
arch/x86/include/asm/cpufeature.h | 7 +++++--
arch/x86/include/asm/cpufeatures.h | 14 +++++++++++---
arch/x86/include/asm/disabled-features.h | 3 ++-
arch/x86/include/asm/msr-index.h | 11 +++++++++++
arch/x86/include/asm/nospec-branch.h | 16 ++++++++++++++++
arch/x86/include/asm/required-features.h | 3 ++-
arch/x86/kernel/cpu/bugs.c | 7 +++++++
arch/x86/kernel/cpu/common.c | 10 ++++++++--
arch/x86/kernel/cpu/scattered.c | 3 +--
arch/x86/kvm/svm.c | 14 ++++++++++++++
arch/x86/kvm/vmx.c | 11 +++++++++++
arch/x86/mm/tlb.c | 21 ++++++++++++++++++++-
12 files changed, 108 insertions(+), 12 deletions(-)
--
2.7.4
