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KVM: nVMX: move host EFER consistency checks to VMFail path 

Invalid host state related to loading EFER on VMExit causes a
VMFail(VMXERR_ENTRY_INVALID_HOST_STATE_FIELD), not a VMExit.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2018-09-26 09:23:39 -07:00 committed by Paolo Bonzini
parent 31fc4f95dd
commit 64a919f7b5
1 changed files with 16 additions and 15 deletions
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31
arch/x86/kvm/vmx.c
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@ -12400,6 +12400,7 @@ static int nested_vmx_check_nmi_controls(struct vmcs12 *vmcs12)
static int check_vmentry_prereqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
bool ia32e;
if (vmcs12->guest_activity_state != GUEST_ACTIVITY_ACTIVE &&
vmcs12->guest_activity_state != GUEST_ACTIVITY_HLT)
@ -12473,6 +12474,21 @@ static int check_vmentry_prereqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
!nested_cr3_valid(vcpu, vmcs12->host_cr3))
return VMXERR_ENTRY_INVALID_HOST_STATE_FIELD;
/*
* If the load IA32_EFER VM-exit control is 1, bits reserved in the
* IA32_EFER MSR must be 0 in the field for that register. In addition,
* the values of the LMA and LME bits in the field must each be that of
* the host address-space size VM-exit control.
*/
if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER) {
ia32e = (vmcs12->vm_exit_controls &
VM_EXIT_HOST_ADDR_SPACE_SIZE) != 0;
if (!kvm_valid_efer(vcpu, vmcs12->host_ia32_efer) ||
ia32e != !!(vmcs12->host_ia32_efer & EFER_LMA) ||
ia32e != !!(vmcs12->host_ia32_efer & EFER_LME))
return VMXERR_ENTRY_INVALID_HOST_STATE_FIELD;
}
/*
* From the Intel SDM, volume 3:
* Fields relevant to VM-entry event injection must be set properly.
@ -12594,21 +12610,6 @@ static int check_vmentry_postreqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
return 1;
}
/*
* If the load IA32_EFER VM-exit control is 1, bits reserved in the
* IA32_EFER MSR must be 0 in the field for that register. In addition,
* the values of the LMA and LME bits in the field must each be that of
* the host address-space size VM-exit control.
*/
if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER) {
ia32e = (vmcs12->vm_exit_controls &
VM_EXIT_HOST_ADDR_SPACE_SIZE) != 0;
if (!kvm_valid_efer(vcpu, vmcs12->host_ia32_efer) ||
ia32e != !!(vmcs12->host_ia32_efer & EFER_LMA) ||
ia32e != !!(vmcs12->host_ia32_efer & EFER_LME))
return 1;
}
if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS) &&
(is_noncanonical_address(vmcs12->guest_bndcfgs & PAGE_MASK, vcpu) ||
(vmcs12->guest_bndcfgs & MSR_IA32_BNDCFGS_RSVD)))