Commit 3fd49abb authored by Dirk Müller's avatar Dirk Müller Committed by Greg Kroah-Hartman

Use WARN_ON_ONCE for missing X86_FEATURE_NRIPS

commit d2922422 upstream.

The cpu feature flags are not ever going to change, so warning
everytime can cause a lot of kernel log spam
(in our case more than 10GB/hour).

The warning seems to only occur when nested virtualization is
enabled, so it's probably triggered by a KVM bug.  This is a
sensible and safe change anyway, and the KVM bug fix might not
be suitable for stable releases anyway.
Signed-off-by: default avatarDirk Mueller <dmueller@suse.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 76bdbeab
......@@ -496,7 +496,7 @@ static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
struct vcpu_svm *svm = to_svm(vcpu);
if (svm->vmcb->control.next_rip != 0) {
WARN_ON(!static_cpu_has(X86_FEATURE_NRIPS));
WARN_ON_ONCE(!static_cpu_has(X86_FEATURE_NRIPS));
svm->next_rip = svm->vmcb->control.next_rip;
}
......
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