From: Peter Dinda <pdinda@northwestern.edu>
Date: Mon, 21 Jul 2008 15:33:55 +0000 (+0000)
Subject: code for new irq hooking mechanism
X-Git-Tag: boots-puppy-iso-to-command-prompt
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=commitdiff_plain;h=0b618729352e97aa06ec2f19f33595f6caaeb9d1

code for new irq hooking mechanism
---

diff --git a/palacios/src/palacios/svm_handler.c b/palacios/src/palacios/svm_handler.c
index 21523f9..f14d94d 100644
--- a/palacios/src/palacios/svm_handler.c
+++ b/palacios/src/palacios/svm_handler.c
@@ -249,6 +249,9 @@ int handle_svm_exit(struct guest_info * info) {
     case EXTERNAL_IRQ: 
       {
 	uint_t irq = get_intr_number(info);
+
+        // check to see if ==-1 (non exists)
+
 	/*	
 	  guest_ctrl->EVENTINJ.vector = irq;
 	  guest_ctrl->EVENTINJ.valid = 1;
diff --git a/palacios/src/palacios/vmm.c b/palacios/src/palacios/vmm.c
index 7ae2239..de1edee 100644
--- a/palacios/src/palacios/vmm.c
+++ b/palacios/src/palacios/vmm.c
@@ -13,6 +13,7 @@ struct vmm_os_hooks * os_hooks = NULL;
 
 
 
+
 void Init_VMM(struct vmm_os_hooks * hooks, struct vmm_ctrl_ops * vmm_ops) {
   vmm_cpu_type = VMM_INVALID_CPU;
 
diff --git a/palacios/src/palacios/vmm_intr.c b/palacios/src/palacios/vmm_intr.c
index ca42f01..fea0959 100644
--- a/palacios/src/palacios/vmm_intr.c
+++ b/palacios/src/palacios/vmm_intr.c
@@ -4,6 +4,7 @@
 #include <palacios/vm_guest.h>
 
 
+
 void init_interrupt_state(struct guest_info * info) {
   info->intr_state.excp_pending = 0;
   info->intr_state.excp_num = 0;
@@ -19,8 +20,82 @@ void set_intr_controller(struct guest_info * info, struct intr_ctrl_ops * ops, v
 
 
 
+// This structure is used to dispatch
+// interrupts delivered to vmm via deliver interrupt to vmm 
+// it is what we put into the opaque field given to 
+// the host os when we install the handler
+struct vmm_intr_decode { 
+  void              (*handler)(struct vmm_intr_state *state);
+  // This opaque is user supplied by the caller
+  // of hook_irq_new
+  void              *opaque;
+};
+
+int hook_irq_new(uint_t irq,
+		 void (*handler)(struct vmm_intr_state *state),
+		 void  *opaque)
+{
+  extern struct vmm_os_hooks * os_hooks;
+
+  struct vmm_intr_decode *d = V3_Malloc(sizeof(struct vmm_intr_decode));
+
+  if (!d) { return -1; }
+
+  d->handler = handler;
+  d->opaque = opaque;
+  
+  if (os_hooks->hook_interrupt_new(irq,d)) { 
+    PrintDebug("hook_irq_new: failed to hook irq 0x%x to decode 0x%x\n", irq,d);
+    return -1;
+  } else {
+    PrintDebug("hook_irq_new: hooked irq 0x%x to decode 0x%x\n", irq,d);
+    return 0;
+  }
+}
+
+
+void deliver_interrupt_to_vmm(struct vmm_intr_state *state)
+{
+
+  PrintDebug("deliver_interrupt_to_vmm: state=0x%x\n",state);
 
+  struct vmm_intr_decode *d = (struct vmm_intr_decode *)(state->opaque);
+  
+  void *temp = state->opaque;
+  state->opaque = d->opaque;
 
+  d->handler(state);
+  
+  state->opaque=temp;
+}
+
+
+void guest_injection_irq_handler(struct vmm_intr_state *state)
+{
+  PrintDebug("guest_irq_injection: state=0x%x\n",state);
+
+  struct guest_info *guest = (struct guest_info *)(state->opaque);
+
+  PrintDebug("guest_irq_injection: injecting irq 0x%x into guest 0x%x\n",state->irq,guest);
+  guest->vm_ops.raise_irq(guest,state->irq);
+}
+
+
+int hook_irq_for_guest_injection(struct guest_info *info, int irq)
+{
+
+  int rc = hook_irq_new(irq,
+			guest_injection_irq_handler,
+			info);
+
+  if (rc) { 
+    PrintDebug("guest_irq_injection: failed to hook irq 0x%x for guest 0x%x\n", irq,info);
+    return -1;
+  } else {
+    PrintDebug("guest_irq_injection: hooked irq 0x%x for guest 0x%x\n", irq,info);
+    return 0;
+  }
+}
 
 
 
@@ -83,14 +158,6 @@ int v3_raise_irq(struct guest_info * info, int irq) {
 
 
 
-
-
-
-
-
-
-
-
 int intr_pending(struct guest_info * info) {
   struct vm_intr * intr_state = &(info->intr_state);