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| author | Dan Williams <dan.j.williams@intel.com> | 2018-01-31 17:47:03 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-13 12:36:01 +0100 |
| commit | eb99bd6341cb3039d0b9d2b7f89d5f2ff98e9676 (patch) | |
| tree | 81869fbe6601d2b32290c001ed71fe415e171dfd /include | |
| parent | 7552556f65af7db6b2bad828beb4c633cb7d8533 (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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions