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KVM: nVMX: WARN if nested run hits VMFail with early consistency checks enabled

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When early consistency checks are enabled, all VMFail conditions
should be caught by nested_vmx_check_vmentry_hw().

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2018-09-26 09:23:58 -07:00 committed by Paolo Bonzini
parent 52017608da
commit 2768c0cc4a
1 changed files with 10 additions and 8 deletions
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18
arch/x86/kvm/vmx.c
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@ -13581,14 +13581,6 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason,
/* trying to cancel vmlaunch/vmresume is a bug */ /* trying to cancel vmlaunch/vmresume is a bug */
WARN_ON_ONCE(vmx->nested.nested_run_pending); WARN_ON_ONCE(vmx->nested.nested_run_pending);
/*
* The only expected VM-instruction error is "VM entry with
* invalid control field(s)." Anything else indicates a
* problem with L0.
*/
WARN_ON_ONCE(vmx->fail && (vmcs_read32(VM_INSTRUCTION_ERROR) !=
VMXERR_ENTRY_INVALID_CONTROL_FIELD));
leave_guest_mode(vcpu); leave_guest_mode(vcpu);
if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING) if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
@ -13615,6 +13607,16 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason,
if (nested_vmx_store_msr(vcpu, vmcs12->vm_exit_msr_store_addr, if (nested_vmx_store_msr(vcpu, vmcs12->vm_exit_msr_store_addr,
vmcs12->vm_exit_msr_store_count)) vmcs12->vm_exit_msr_store_count))
nested_vmx_abort(vcpu, VMX_ABORT_SAVE_GUEST_MSR_FAIL); nested_vmx_abort(vcpu, VMX_ABORT_SAVE_GUEST_MSR_FAIL);
} else {
/*
* The only expected VM-instruction error is "VM entry with
* invalid control field(s)." Anything else indicates a
* problem with L0. And we should never get here with a
* VMFail of any type if early consistency checks are enabled.
*/
WARN_ON_ONCE(vmcs_read32(VM_INSTRUCTION_ERROR) !=
VMXERR_ENTRY_INVALID_CONTROL_FIELD);
WARN_ON_ONCE(nested_early_check);
} }
vmx_switch_vmcs(vcpu, &vmx->vmcs01); vmx_switch_vmcs(vcpu, &vmx->vmcs01);