kvm: svm: Ensure an IBPB on all affected CPUs when freeing a vmcb

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commit fd65d3142f upstream.

Previously, we only called indirect_branch_prediction_barrier on the
logical CPU that freed a vmcb. This function should be called on all
logical CPUs that last loaded the vmcb in question.

Fixes: 15d4507152 ("KVM/x86: Add IBPB support")
Reported-by: Neel Natu <neelnatu@google.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Jim Mattson 2018-05-22 09:54:20 -07:00 • committed by Ben Hutchings

parent 434344298c

commit 31b4872135

1 changed files with 15 additions and 5 deletions

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arch/x86/kvm/svm.c

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