KVM: Make kvm_cpu_(has|get)_interrupt() work for userspace irqchip too

At the vector level, kernel and userspace irqchip are fairly similar.

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

4 files changed, 25 insertions, 15 deletions

diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c
index cf17ed52f6fb..11c2757b808f 100644
--- a/arch/x86/kvm/irq.c
+++ b/arch/x86/kvm/irq.c
@@ -24,6 +24,7 @@
 
 #include "irq.h"
 #include "i8254.h"
+#include "x86.h"
 
 /*
  * check if there are pending timer events
@@ -48,6 +49,9 @@ int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
 {
         struct kvm_pic *s;
 
+        if (!irqchip_in_kernel(v->kvm))
+                return v->arch.irq_summary;
+
         if (kvm_apic_has_interrupt(v) == -1) {  /* LAPIC */
                 if (kvm_apic_accept_pic_intr(v)) {
                         s = pic_irqchip(v->kvm);        /* PIC */
@@ -67,6 +71,9 @@ int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
         struct kvm_pic *s;
         int vector;
 
+        if (!irqchip_in_kernel(v->kvm))
+                return kvm_pop_irq(v);
+
         vector = kvm_get_apic_interrupt(v);     /* APIC */
         if (vector == -1) {
                 if (kvm_apic_accept_pic_intr(v)) {
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 8fc6eea148e7..6eef6d22e87e 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -2091,8 +2091,9 @@ static int interrupt_window_interception(struct vcpu_svm *svm,
          * If the user space waits to inject interrupts, exit as soon as
          * possible
          */
-        if (kvm_run->request_interrupt_window &&
-            !svm->vcpu.arch.irq_summary) {
+        if (!irqchip_in_kernel(svm->vcpu.kvm) &&
+            kvm_run->request_interrupt_window &&
+            !kvm_cpu_has_interrupt(&svm->vcpu)) {
                 ++svm->vcpu.stat.irq_window_exits;
                 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
                 return 0;
@@ -2373,7 +2374,8 @@ static void do_interrupt_requests(struct kvm_vcpu *vcpu,
                  (svm->vmcb->save.rflags & X86_EFLAGS_IF) &&
                  (svm->vcpu.arch.hflags & HF_GIF_MASK));
 
-        if (svm->vcpu.arch.interrupt_window_open && svm->vcpu.arch.irq_summary)
+        if (svm->vcpu.arch.interrupt_window_open &&
+            kvm_cpu_has_interrupt(&svm->vcpu))
                 /*
                  * If interrupts enabled, and not blocked by sti or mov ss. Good.
                  */
@@ -2383,7 +2385,8 @@ static void do_interrupt_requests(struct kvm_vcpu *vcpu,
          * Interrupts blocked.  Wait for unblock.
          */
         if (!svm->vcpu.arch.interrupt_window_open &&
-            (svm->vcpu.arch.irq_summary || kvm_run->request_interrupt_window))
+            (kvm_cpu_has_interrupt(&svm->vcpu) ||
+             kvm_run->request_interrupt_window))
                 svm_set_vintr(svm);
         else
                 svm_clear_vintr(svm);
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index c6997c0e8ca6..b3292c1ea2f2 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2535,21 +2535,20 @@ static void do_interrupt_requests(struct kvm_vcpu *vcpu,
                 vmx_inject_nmi(vcpu);
                 if (vcpu->arch.nmi_pending)
                         enable_nmi_window(vcpu);
-                else if (vcpu->arch.irq_summary
-                         || kvm_run->request_interrupt_window)
+                else if (kvm_cpu_has_interrupt(vcpu) ||
+                         kvm_run->request_interrupt_window)
                         enable_irq_window(vcpu);
                 return;
         }
 
         if (vcpu->arch.interrupt_window_open) {
-                if (vcpu->arch.irq_summary && !vcpu->arch.interrupt.pending)
-                        kvm_queue_interrupt(vcpu, kvm_pop_irq(vcpu));
+                if (kvm_cpu_has_interrupt(vcpu) && !vcpu->arch.interrupt.pending)
+                        kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu));
 
                 if (vcpu->arch.interrupt.pending)
                         vmx_inject_irq(vcpu, vcpu->arch.interrupt.nr);
-        }
-        if (!vcpu->arch.interrupt_window_open &&
-            (vcpu->arch.irq_summary || kvm_run->request_interrupt_window))
+        } else if(kvm_cpu_has_interrupt(vcpu) ||
+                  kvm_run->request_interrupt_window)
                 enable_irq_window(vcpu);
 }
 
@@ -2976,8 +2975,9 @@ static int handle_interrupt_window(struct kvm_vcpu *vcpu,
          * If the user space waits to inject interrupts, exit as soon as
          * possible
          */
-        if (kvm_run->request_interrupt_window &&
-            !vcpu->arch.irq_summary) {
+        if (!irqchip_in_kernel(vcpu->kvm) &&
+            kvm_run->request_interrupt_window &&
+            !kvm_cpu_has_interrupt(vcpu)) {
                 kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
                 return 0;
         }
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2bad49b535c8..4c2eb7c0e1fb 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3069,7 +3069,7 @@ EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
 static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
                                           struct kvm_run *kvm_run)
 {
-        return (!vcpu->arch.irq_summary &&
+        return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) &&
                 kvm_run->request_interrupt_window &&
                 vcpu->arch.interrupt_window_open &&
                 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
@@ -3086,7 +3086,7 @@ static void post_kvm_run_save(struct kvm_vcpu *vcpu,
         else
                 kvm_run->ready_for_interrupt_injection =
                                         (vcpu->arch.interrupt_window_open &&
-                                         vcpu->arch.irq_summary == 0);
+                                         !kvm_cpu_has_interrupt(vcpu));
 }
 
 static void vapic_enter(struct kvm_vcpu *vcpu)