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| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2018-09-26 18:23:58 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-10-17 00:30:00 +0200 |
| commit | 2768c0cc4ad591d846568a989bcdf2c49660a97e (patch) | |
| tree | e56133da20f26d92d0c1bcdc81ba0e5e0f377b63 /arch/x86/kvm | |
| parent | KVM: nVMX: add option to perform early consistency checks via H/W (diff) | |
| download | linux-2768c0cc4ad591d846568a989bcdf2c49660a97e.tar.xz linux-2768c0cc4ad591d846568a989bcdf2c49660a97e.zip | |
KVM: nVMX: WARN if nested run hits VMFail with early consistency checks enabled
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>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index fb4a8694ee52..c255686ebd1a 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -13581,14 +13581,6 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, /* trying to cancel vmlaunch/vmresume is a bug */ 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); 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, vmcs12->vm_exit_msr_store_count)) 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); |