added swintr support to update_irq_entry_state

[palacios.git] / palacios / src / palacios / svm.c

diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c
index 4b5b0a9..824f7d2 100644 (file)
--- a/palacios/src/palacios/svm.c
+++ b/palacios/src/palacios/svm.c
@@ -1,3 +1,4 @@
+
 /* 
  * This file is part of the Palacios Virtual Machine Monitor developed
  * by the V3VEE Project with funding from the United States National 
@@ -423,8 +424,20 @@ static int update_irq_entry_state(struct guest_info * info) {
                guest_ctrl->EVENTINJ.type = SVM_INJECTION_NMI;
                break;
            case V3_SOFTWARE_INTR:
-               guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
-               break;
+            guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
+#ifdef V3_CONFIG_EXT_SW_INTERRUPTS
+#ifdef V3_CONFIG_DEBUG_EXT_SW_INTERRUPTS
+            PrintDebug("Caught an injected software interrupt\n");
+            PrintDebug("\ttype: %d, vector: %d\n", SVM_INJECTION_SOFT_INTR, info->intr_core_state.swintr_vector);
+#endif
+            guest_ctrl->EVENTINJ.vector = info->intr_core_state.swintr_vector;
+            guest_ctrl->EVENTINJ.valid = 1;
+            
+            /* reset swintr state */
+            info->intr_core_state.swintr_posted = 0;
+            info->intr_core_state.swintr_vector = 0;
+#endif
+            break;
            case V3_VIRTUAL_IRQ:
                guest_ctrl->EVENTINJ.type = SVM_INJECTION_IRQ;
                break;
@@ -462,7 +475,9 @@ int v3_svm_enter(struct guest_info * info) {
     // disable global interrupts for vm state transition
     v3_clgi();
 
-    // Update timer devices prior to entering VM.
+    // Update timer devices after being in the VM, with interupts
+    // disabled, but before doing IRQ updates, so that any interrupts they 
+    //raise get seen immediately.
     v3_update_timers(info);
 
     // Synchronize the guest state to the VMCB
@@ -547,13 +562,11 @@ int v3_svm_enter(struct guest_info * info) {
     info->mem_mode = v3_get_vm_mem_mode(info);
     /* ** */
 
-
     // save exit info here
     exit_code = guest_ctrl->exit_code;
     exit_info1 = guest_ctrl->exit_info1;
     exit_info2 = guest_ctrl->exit_info2;
 
-
 #ifdef V3_CONFIG_SYMCALL
     if (info->sym_core_state.symcall_state.sym_call_active == 0) {
        update_irq_exit_state(info);
@@ -562,20 +575,20 @@ int v3_svm_enter(struct guest_info * info) {
     update_irq_exit_state(info);
 #endif
 
-
     // reenable global interrupts after vm exit
     v3_stgi();
-
  
     // Conditionally yield the CPU if the timeslice has expired
     v3_yield_cond(info);
 
-
-
-    if (v3_handle_svm_exit(info, exit_code, exit_info1, exit_info2) != 0) {
-       PrintError("Error in SVM exit handler\n");
-       PrintError("  last exit was %d\n", v3_last_exit);
-       return -1;
+    {
+       int ret = v3_handle_svm_exit(info, exit_code, exit_info1, exit_info2);
+       
+       if (ret != 0) {
+           PrintError("Error in SVM exit handler (ret=%d)\n", ret);
+           PrintError("  last Exit was %d (exit code=0x%llx)\n", v3_last_exit, (uint64_t) exit_code);
+           return -1;
+       }
     }
 
 
@@ -668,11 +681,12 @@ int v3_start_svm_guest(struct guest_info * info) {
 
        
 
-       if ((info->num_exits % 5000) == 0) {
+/*
+       if ((info->num_exits % 50000) == 0) {
            V3_Print("SVM Exit number %d\n", (uint32_t)info->num_exits);
            v3_print_guest_state(info);
        }
-
+*/
        
     }
 
@@ -684,6 +698,31 @@ int v3_start_svm_guest(struct guest_info * info) {
 
 
 
+int v3_reset_svm_vm_core(struct guest_info * core, addr_t rip) {
+    // init vmcb_bios
+
+    // Write the RIP, CS, and descriptor
+    // assume the rest is already good to go
+    //
+    // vector VV -> rip at 0
+    //              CS = VV00
+    //  This means we start executing at linear address VV000
+    //
+    // So the selector needs to be VV00
+    // and the base needs to be VV000
+    //
+    core->rip = 0;
+    core->segments.cs.selector = rip << 8;
+    core->segments.cs.limit = 0xffff;
+    core->segments.cs.base = rip << 12;
+
+    return 0;
+}
+
+
+
+
+
 
 /* Checks machine SVM capability */
 /* Implemented from: AMD Arch Manual 3, sect 15.4 */ 
@@ -733,11 +772,11 @@ int v3_is_svm_capable() {
 
 static int has_svm_nested_paging() {
     uint32_t eax = 0, ebx = 0, ecx = 0, edx = 0;
-
+    
     v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
-
+    
     //PrintDebug("CPUID_EXT_FEATURE_IDS_edx=0x%x\n", edx);
-
+    
     if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) {
        V3_Print("SVM Nested Paging not supported\n");
        return 0;
@@ -745,7 +784,8 @@ static int has_svm_nested_paging() {
        V3_Print("SVM Nested Paging supported\n");
        return 1;
     }
-}
+ }
+ 
 
 
 void v3_init_svm_cpu(int cpu_id) {