WARN if KVM attempts to switch to the currently loaded VMCS. Now that
nested_vmx_free_vcpu() doesn't blindly call vmx_switch_vmcs(), all paths
that lead to vmx_switch_vmcs() are implicitly guarded by guest vs. host
mode, e.g. KVM should never emulate VMX instructions when guest mode is
active, and nested_vmx_vmexit() should never be called when host mode is
active.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <
20200923184452.980-8-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
struct loaded_vmcs *prev;
int cpu;
- if (vmx->loaded_vmcs == vmcs)
+ if (WARN_ON_ONCE(vmx->loaded_vmcs == vmcs))
return;
cpu = get_cpu();