Fix interrupts not working with -enable-kvm

kernel/dev/ps2kbdev.c

@@ -165,7 +165,7 @@ int ps2kbdev_intr(IntrStackFrame *frame) {
     ipc_mbuspublish("ps2kb", &b);
   }
 
-  return INTR_OK;
+  return 0;
 }
 
 void ps2kbdev_init(void) {

kernel/intr/intr.c

@@ -246,16 +246,13 @@ void intr_handleintr(IntrStackFrame *frame) {
       cpu_hang();
     }
   } else if (frame->trapnum >= 32 && frame->trapnum <= 47) {
-    bool send = true;
     IntrHandler *ih, *ihtmp;
     LL_FOREACH_SAFE(INTR_HANDLERS, ih, ihtmp) {
       if ((uint64_t)ih->irq == frame->trapnum) {
-        if (ih->fn(frame) == INTR_NOEOI) {
-          send = false;
+        ih->fn(frame);
       }
     }
-    }
-    if (send) intr_pic_eoi();
+    intr_pic_eoi();
   } else if (frame->trapnum == 0x80) {
     intr_syscalldispatch(frame);
   }

kernel/intr/intr.h

@@ -7,9 +7,6 @@
 
 #define INTR_IRQBASE 0x20
 
-#define INTR_OK     1
-#define INTR_NOEOI  2
-
 typedef struct {
   uint64_t r15;
   uint64_t r14;

kernel/intr/pit.c

@@ -33,7 +33,7 @@ void intr_pit_wait(uint32_t ms) {
 
 int intr_pit_intr(IntrStackFrame *frame) {
   PIT_TICKS++;
-  return INTR_OK;
+  return 0;
 }
 
 void intr_pit_init(void) {

kernel/proc/proc.c

@@ -256,7 +256,7 @@ void proc_killself(void) {
 int proc_intr(IntrStackFrame *frame) {
   intr_pic_eoi();
   proc_sched(frame);
-  return INTR_NOEOI;
+  return 0;
 }
 
 void proc_init(void) {