KVM: Fold kvm_run::exit_type into kvm_run::exit_reason

Currently, userspace is told about the nature of the last exit from the
guest using two fields, exit_type and exit_reason, where exit_type has
just two enumerations (and no need for more).  So fold exit_type into
exit_reason, reducing the complexity of determining what really happened.

Signed-off-by: Avi Kivity <avi@qumranet.com>

3 files changed, 7 insertions, 10 deletions

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index de93117f1e97..ac44df551aa8 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -1608,8 +1608,7 @@ static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 
         vcpu->mmio_needed = 0;
 
-        if (kvm_run->exit_type == KVM_EXIT_TYPE_VM_EXIT
-            && kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
+        if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
                 kvm_arch_ops->cache_regs(vcpu);
                 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
                 kvm_arch_ops->decache_regs(vcpu);
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index d4b2936479d9..b09928f14219 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -1298,8 +1298,6 @@ static int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 {
         u32 exit_code = vcpu->svm->vmcb->control.exit_code;
 
-        kvm_run->exit_type = KVM_EXIT_TYPE_VM_EXIT;
-
         if (is_external_interrupt(vcpu->svm->vmcb->control.exit_int_info) &&
             exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR)
                 printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
@@ -1609,8 +1607,9 @@ again:
         vcpu->svm->next_rip = 0;
 
         if (vcpu->svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
-                kvm_run->exit_type = KVM_EXIT_TYPE_FAIL_ENTRY;
-                kvm_run->exit_reason = vcpu->svm->vmcb->control.exit_code;
+                kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
+                kvm_run->fail_entry.hardware_entry_failure_reason
+                        = vcpu->svm->vmcb->control.exit_code;
                 post_kvm_run_save(vcpu, kvm_run);
                 return 0;
         }
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 71410a65bb90..cf9568fbe8a5 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1922,10 +1922,10 @@ again:
 
         asm ("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
 
-        kvm_run->exit_type = 0;
         if (fail) {
-                kvm_run->exit_type = KVM_EXIT_TYPE_FAIL_ENTRY;
-                kvm_run->exit_reason = vmcs_read32(VM_INSTRUCTION_ERROR);
+                kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
+                kvm_run->fail_entry.hardware_entry_failure_reason
+                        = vmcs_read32(VM_INSTRUCTION_ERROR);
                 r = 0;
         } else {
                 /*
@@ -1935,7 +1935,6 @@ again:
                         profile_hit(KVM_PROFILING, (void *)vmcs_readl(GUEST_RIP));
 
                 vcpu->launched = 1;
-                kvm_run->exit_type = KVM_EXIT_TYPE_VM_EXIT;
                 r = kvm_handle_exit(kvm_run, vcpu);
                 if (r > 0) {
                         /* Give scheduler a change to reschedule. */