KVM: MMU: load PDPTRs outside mmu_lock

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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>

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Paolo Bonzini 2021-04-08 08:10:25 -04:00

parent d9bd0082e2

commit 4a38162ee9

1 changed files with 37 additions and 15 deletions

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arch/x86/kvm/mmu/mmu.c

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