diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2018-02-23 11:42:10 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-25 11:03:54 +0100 |
| commit | 355e059499da0eca1cd550ffcb3136f442dc7df8 (patch) | |
| tree | b2e5157fe0ab2dc546645f2d76f04f43697b48ed /include/linux | |
| parent | ac0242fe0d9d698dde4a1fc249915af24a2a4c99 (diff) | |
x86/kvm: Update spectre-v1 mitigation
(cherry picked from commit 085331dfc6bbe3501fb936e657331ca943827600)
Commit 75f139aaf896 "KVM: x86: Add memory barrier on vmcs field lookup"
added a raw 'asm("lfence");' to prevent a bounds check bypass of
'vmcs_field_to_offset_table'.
The lfence can be avoided in this path by using the array_index_nospec()
helper designed for these types of fixes.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Andrew Honig <ahonig@google.com>
Cc: kvm@vger.kernel.org
Cc: Jim Mattson <jmattson@google.com>
Link: https://lkml.kernel.org/r/151744959670.6342.3001723920950249067.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
[jwang: cherry pick to 4.4]
Signed-off-by: Jack Wang <jinpu.wang@profitbricks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions