KVM: SVM: Serialize access to the SEV ASID bitmap
The SEV ASID bitmap currently is not protected against parallel SEV guest startups. This can result in an SEV guest failing to start because another SEV guest could have been assigned the same ASID value. Use a mutex to serialize access to the SEV ASID bitmap. Fixes: 1654efcb ("KVM: SVM: Add KVM_SEV_INIT command") Tested-by: NDavid Rientjes <rientjes@google.com> Signed-off-by: NTom Lendacky <thomas.lendacky@amd.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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