KVM: nVMX: Disable PML in hardware when running L2
Unconditionally disable PML in vmcs02, KVM emulates PML purely in the MMU, e.g. vmx_flush_pml_buffer() doesn't even try to copy the L2 GPAs from vmcs02's buffer to vmcs12. At best, enabling PML is a nop. At worst, it will cause vmx_flush_pml_buffer() to record bogus GFNs in the dirty logs. Initialize vmcs02.GUEST_PML_INDEX such that PML writes would trigger VM-Exit if PML was somehow enabled, skip flushing the buffer for guest mode since the index is bogus, and freak out if a PML full exit occurs when L2 is active. Signed-off-by:Sean Christopherson <seanjc@google.com> Message-Id: <20210213005015.1651772-7-seanjc@google.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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