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On SVM, reading PDPTRs might access guest memory, which might fault
and thus might sleep. On the other hand, it is not possible to
release the lock after make_mmu_pages_available has been called.
Therefore, push the call to make_mmu_pages_available and the
mmu_lock critical section within mmu_alloc_direct_roots and
mmu_alloc_shadow_roots.
Reported-by: Wanpeng Li <wanpengli@tencent.com>
Co-developed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4a38162ee9