KVM: nVMX: Return -EINVAL when signaling failure in VM-Entry helpers

Most, but not all, helpers that are related to emulating consistency
checks for nested VM-Entry return -EINVAL when a check fails.  Convert
the holdouts to have consistency throughout and to make it clear that
the functions are signaling pass/fail as opposed to "resume guest" vs.
"exit to userspace".

Opportunistically fix bad indentation in nested_vmx_check_guest_state().

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 56c22e5..b46136b 100644 (file)
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -930,7 +930,7 @@ static int nested_vmx_load_cr3(struct kvm_vcpu *vcpu, unsigned long cr3, bool ne
        if (cr3 != kvm_read_cr3(vcpu) || (!nested_ept && pdptrs_changed(vcpu))) {
                if (!nested_cr3_valid(vcpu, cr3)) {
                        *entry_failure_code = ENTRY_FAIL_DEFAULT;
-                       return 1;
+                       return -EINVAL;
                }
 
                /*
@@ -941,7 +941,7 @@ static int nested_vmx_load_cr3(struct kvm_vcpu *vcpu, unsigned long cr3, bool ne
                    !nested_ept) {
                        if (!load_pdptrs(vcpu, vcpu->arch.walk_mmu, cr3)) {
                                *entry_failure_code = ENTRY_FAIL_PDPTE;
-                               return 1;
+                               return -EINVAL;
                        }
                }
        }
@@ -2373,13 +2373,13 @@ static int prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12,
         */
        if (vmx->emulation_required) {
                *entry_failure_code = ENTRY_FAIL_DEFAULT;
-               return 1;
+               return -EINVAL;
        }
 
        /* Shadow page tables on either EPT or shadow page tables. */
        if (nested_vmx_load_cr3(vcpu, vmcs12->guest_cr3, nested_cpu_has_ept(vmcs12),
                                entry_failure_code))
-               return 1;
+               return -EINVAL;
 
        if (!enable_ept)
                vcpu->arch.walk_mmu->inject_page_fault = vmx_inject_page_fault_nested;
@@ -2685,15 +2685,15 @@ static int nested_vmx_check_guest_state(struct kvm_vcpu *vcpu,
 
        if (!nested_guest_cr0_valid(vcpu, vmcs12->guest_cr0) ||
            !nested_guest_cr4_valid(vcpu, vmcs12->guest_cr4))
-               return 1;
+               return -EINVAL;
 
        if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT) &&
            !kvm_pat_valid(vmcs12->guest_ia32_pat))
-               return 1;
+               return -EINVAL;
 
        if (nested_vmx_check_vmcs_link_ptr(vcpu, vmcs12)) {
                *exit_qual = ENTRY_FAIL_VMCS_LINK_PTR;
-               return 1;
+               return -EINVAL;
        }
 
        /*
@@ -2712,16 +2712,16 @@ static int nested_vmx_check_guest_state(struct kvm_vcpu *vcpu,
                    ia32e != !!(vmcs12->guest_ia32_efer & EFER_LMA) ||
                    ((vmcs12->guest_cr0 & X86_CR0_PG) &&
                     ia32e != !!(vmcs12->guest_ia32_efer & EFER_LME)))
-                       return 1;
+                       return -EINVAL;
        }
 
        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)))
-                       return 1;
+           (is_noncanonical_address(vmcs12->guest_bndcfgs & PAGE_MASK, vcpu) ||
+            (vmcs12->guest_bndcfgs & MSR_IA32_BNDCFGS_RSVD)))
+               return -EINVAL;
 
        if (nested_check_guest_non_reg_state(vmcs12))
-               return 1;
+               return -EINVAL;
 
        return 0;
 }