Removed a lot of the highly specific multicore code from the general core VMM code

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

diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c
index 34fed45..793f2d0 100644 (file)
--- a/palacios/src/palacios/svm.c
+++ b/palacios/src/palacios/svm.c
@@ -44,6 +44,12 @@
 #include <palacios/vmm_sprintf.h>
 
 
+#ifndef CONFIG_DEBUG_SVM
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
+
 uint32_t v3_last_exit;
 
 // This is a global pointer to the host's VMCB
@@ -74,8 +80,6 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
 
 
     //
-
-
     ctrl_area->svm_instrs.VMRUN = 1;
     ctrl_area->svm_instrs.VMMCALL = 1;
     ctrl_area->svm_instrs.VMLOAD = 1;
@@ -93,6 +97,12 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
     ctrl_area->instrs.CPUID = 1;
 
     ctrl_area->instrs.HLT = 1;
+
+#ifdef CONFIG_TIME_VIRTUALIZE_TSC
+    ctrl_area->instrs.rdtsc = 1;
+    ctrl_area->svm_instrs.rdtscp = 1;
+#endif
+
     // guest_state->cr0 = 0x00000001;    // PE 
   
     /*
@@ -416,7 +426,6 @@ static int update_irq_entry_state(struct guest_info * info) {
 int v3_svm_enter(struct guest_info * info) {
     vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
     vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data)); 
-    ullong_t tmp_tsc;
     addr_t exit_code = 0, exit_info1 = 0, exit_info2 = 0;
 
     // Conditionally yield the CPU if the timeslice has expired
@@ -469,32 +478,26 @@ int v3_svm_enter(struct guest_info * info) {
     }
 #endif
 
+    v3_update_timers(info);
 
-    rdtscll(tmp_tsc);
-    v3_update_time(info, (tmp_tsc - info->time_state.cached_host_tsc));
-    rdtscll(info->time_state.cached_host_tsc);
-    //    guest_ctrl->TSC_OFFSET = info->time_state.guest_tsc - info->time_state.cached_host_tsc;
+    /* If this guest is frequency-lagged behind host time, wait 
+     * for the appropriate host time before resuming the guest. */
+    v3_adjust_time(info);
 
-    //V3_Print("Calling v3_svm_launch\n");
+    guest_ctrl->TSC_OFFSET = v3_tsc_host_offset(&info->time_state);
 
+    //V3_Print("Calling v3_svm_launch\n");
 
     v3_svm_launch((vmcb_t *)V3_PAddr(info->vmm_data), &(info->vm_regs), (vmcb_t *)host_vmcbs[info->cpu_id]);
-    
-    //V3_Print("SVM Returned: Exit Code: %x, guest_rip=%lx\n", (uint32_t)(guest_ctrl->exit_code), (unsigned long)guest_state->rip);
 
+    //V3_Print("SVM Returned: Exit Code: %x, guest_rip=%lx\n", (uint32_t)(guest_ctrl->exit_code), (unsigned long)guest_state->rip);
 
     v3_last_exit = (uint32_t)(guest_ctrl->exit_code);
 
-    //rdtscll(tmp_tsc);
-    //    v3_update_time(info, tmp_tsc - info->time_state.cached_host_tsc);
-
     //PrintDebug("SVM Returned\n");
     
     info->num_exits++;
 
-
-
-
     // Save Guest state from VMCB
     info->rip = guest_state->rip;
     info->vm_regs.rsp = guest_state->rsp;
@@ -552,46 +555,36 @@ int v3_svm_enter(struct guest_info * info) {
 }
 
 
-int v3_start_svm_guest(struct guest_info *info) {
+int v3_start_svm_guest(struct guest_info * info) {
     //    vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
     //  vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
 
+    PrintDebug("Starting SVM core %u\n", info->cpu_id);
+
+    if (info->cpu_id == 0) {
+       info->core_run_state = CORE_RUNNING;
+       info->vm_info->run_state = VM_RUNNING;
+    } else  { 
+       PrintDebug("SVM core %u: Waiting for core initialization\n", info->cpu_id);
 
-    PrintDebug("Starting SVM core %u\n",info->cpu_id);
-    if (info->cpu_mode==INIT) { 
-       PrintDebug("SVM core %u: I am an AP in INIT mode, waiting for that to change\n",info->cpu_id);
-       while (info->cpu_mode==INIT) {
+       while (info->core_run_state == CORE_STOPPED) {
            v3_yield(info);
            //PrintDebug("SVM core %u: still waiting for INIT\n",info->cpu_id);
        }
-       PrintDebug("SVM core %u: I am out of INIT\n",info->cpu_id);
-       if (info->cpu_mode==SIPI) { 
-           PrintDebug("SVM core %u: I am waiting on a SIPI to set my starting address\n",info->cpu_id);
-           while (info->cpu_mode==SIPI) {
-               v3_yield(info);
-               //PrintDebug("SVM core %u: still waiting for SIPI\n",info->cpu_id);
-           }
-       }
-       PrintDebug("SVM core %u: I have my SIPI\n", info->cpu_id);
-    }
 
-    if (info->cpu_mode!=REAL) { 
-       PrintError("SVM core %u: I am not in REAL mode at launch!  Huh?!\n", info->cpu_id);
-       return -1;
-    }
+       PrintDebug("SVM core %u initialized\n", info->cpu_id);
+    } 
 
     PrintDebug("SVM core %u: I am starting at CS=0x%x (base=0x%p, limit=0x%x),  RIP=0x%p\n", 
-              info->cpu_id, info->segments.cs.selector, (void*)(info->segments.cs.base), 
-              info->segments.cs.limit,(void*)(info->rip));
+              info->cpu_id, info->segments.cs.selector, (void *)(info->segments.cs.base), 
+              info->segments.cs.limit,(void *)(info->rip));
 
 
 
     PrintDebug("SVM core %u: Launching SVM VM (vmcb=%p)\n", info->cpu_id, (void *)info->vmm_data);
     //PrintDebugVMCB((vmcb_t*)(info->vmm_data));
     
-    info->vm_info->run_state = VM_RUNNING;
-    rdtscll(info->yield_start_cycle);
-
+    v3_start_time(info);
 
     while (1) {
        if (v3_svm_enter(info) == -1) {