KVM: Reduce runnability interface with arch support code

Remove kvm_cpu_has_interrupt() and kvm_arch_interrupt_allowed() from
interface between general code and arch code. kvm_arch_vcpu_runnable()
checks for interrupts instead.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

7 files changed, 11 insertions, 40 deletions

diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index d7aa6bb8f477..0ad09f05efa9 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -1935,19 +1935,6 @@ int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
     return find_highest_bits((int *)&vpd->irr[0]);
 }
 
-int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
-{
-        if (kvm_highest_pending_irq(vcpu) != -1)
-                return 1;
-        return 0;
-}
-
-int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
-{
-        /* do real check here */
-        return 1;
-}
-
 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 {
         return vcpu->arch.timer_fired;
@@ -1960,7 +1947,8 @@ gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
 
 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
 {
-        return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE;
+        return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) ||
+                (kvm_highest_pending_irq(vcpu) != -1);
 }
 
 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 0341391eff12..2a4551f78f60 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -39,20 +39,9 @@ gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
         return gfn;
 }
 
-int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
-{
-        return !!(v->arch.pending_exceptions);
-}
-
-int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
-{
-        /* do real check here */
-        return 1;
-}
-
 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
 {
-        return !(v->arch.msr & MSR_WE);
+        return !(v->arch.msr & MSR_WE) || !!(v->arch.pending_exceptions);
 }
 
 
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 4d613415c435..2c2f98353415 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -283,7 +283,7 @@ static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
         return 1;
 }
 
-int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
+static int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
 {
         struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
         struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
@@ -320,12 +320,6 @@ int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
         return rc;
 }
 
-int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
-{
-        /* do real check here */
-        return 1;
-}
-
 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
 {
         return 0;
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 3f4f00a23536..08732d7b6d98 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -797,6 +797,8 @@ asmlinkage void kvm_handle_fault_on_reboot(void);
 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
 int kvm_age_hva(struct kvm *kvm, unsigned long hva);
 int cpuid_maxphyaddr(struct kvm_vcpu *vcpu);
+int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
+int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
 
 #endif /* _ASM_X86_KVM_HOST_H */
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 11cfd897aac6..b87d65d89a05 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4890,8 +4890,10 @@ void kvm_arch_flush_shadow(struct kvm *kvm)
 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
 {
         return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE
-               || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED
-               || vcpu->arch.nmi_pending;
+                || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED
+                || vcpu->arch.nmi_pending ||
+                (kvm_arch_interrupt_allowed(vcpu) &&
+                 kvm_cpu_has_interrupt(vcpu));
 }
 
 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 2c6a5f008746..4af56036a6bf 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -332,7 +332,6 @@ int kvm_arch_hardware_setup(void);
 void kvm_arch_hardware_unsetup(void);
 void kvm_arch_check_processor_compat(void *rtn);
 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
-int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
 
 void kvm_free_physmem(struct kvm *kvm);
 
@@ -341,7 +340,6 @@ void kvm_arch_destroy_vm(struct kvm *kvm);
 void kvm_free_all_assigned_devices(struct kvm *kvm);
 void kvm_arch_sync_events(struct kvm *kvm);
 
-int kvm_cpu_has_interrupt(struct kvm_vcpu *v);
 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
 void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index d7b9bbba26da..532af9b41ee3 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1666,9 +1666,7 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
         for (;;) {
                 prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE);
 
-                if ((kvm_arch_interrupt_allowed(vcpu) &&
-                                        kvm_cpu_has_interrupt(vcpu)) ||
-                                kvm_arch_vcpu_runnable(vcpu)) {
+                if (kvm_arch_vcpu_runnable(vcpu)) {
                         set_bit(KVM_REQ_UNHALT, &vcpu->requests);
                         break;
                 }