added barrier synchronization and integrated it with pause/continue functionality

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

diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c
index d23c56d..a781fe3 100644 (file)
--- a/palacios/src/palacios/svm.c
+++ b/palacios/src/palacios/svm.c
@@ -36,6 +36,8 @@
 #include <palacios/svm_msr.h>
 
 #include <palacios/vmm_rbtree.h>
+#include <palacios/vmm_barrier.h>
+
 
 #include <palacios/vmm_direct_paging.h>
 
@@ -81,6 +83,24 @@ static vmcb_t * Allocate_VMCB() {
 }
 
 
+static int v3_svm_handle_efer_write(struct guest_info * core, uint_t msr, struct v3_msr src, void * priv_data)
+{
+    int status;
+
+    // Call arch-independent handler
+    if ((status = v3_handle_efer_write(core, msr, src, priv_data)) != 0)
+       return status;
+
+    // SVM-specific code
+    if (core->shdw_pg_mode == NESTED_PAGING) {
+       // Ensure that hardware visible EFER.SVME bit is set (SVM Enable)
+       struct efer_64 * hw_efer = (struct efer_64 *)&(core->ctrl_regs.efer);
+       hw_efer->svme = 1;
+    }
+
+    return 0;
+}
+
 
 static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
     vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA(vmcb);
@@ -221,7 +241,7 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
 
     v3_hook_msr(core->vm_info, EFER_MSR, 
                &v3_handle_efer_read,
-               &v3_handle_efer_write, 
+               &v3_svm_handle_efer_write, 
                core);
 
     if (core->shdw_pg_mode == SHADOW_PAGING) {
@@ -425,6 +445,18 @@ static int update_irq_entry_state(struct guest_info * info) {
                break;
            case V3_SOFTWARE_INTR:
                guest_ctrl->EVENTINJ.type = SVM_INJECTION_SOFT_INTR;
+
+#ifdef V3_CONFIG_DEBUG_INTERRUPTS
+               PrintDebug("Injecting software interrupt --  type: %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;
+               
                break;
            case V3_VIRTUAL_IRQ:
                guest_ctrl->EVENTINJ.type = SVM_INJECTION_IRQ;
@@ -661,6 +693,8 @@ int v3_start_svm_guest(struct guest_info * info) {
            break;
        }
 
+       v3_wait_at_barrier(info);
+
 
        if (info->vm_info->run_state == VM_STOPPED) {
            info->core_run_state = CORE_STOPPED;