disable pause exiting

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

diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c
index f9dad0b..e592aa6 100644 (file)
--- a/palacios/src/palacios/svm.c
+++ b/palacios/src/palacios/svm.c
@@ -129,10 +129,9 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
 
     ctrl_area->instrs.HLT = 1;
 
-#ifdef V3_CONFIG_TIME_VIRTUALIZE_TSC
-    ctrl_area->instrs.RDTSC = 1;
-    ctrl_area->svm_instrs.RDTSCP = 1;
-#endif
+    /* Set at VMM launch as needed */
+    ctrl_area->instrs.RDTSC = 0;
+    ctrl_area->svm_instrs.RDTSCP = 0;
 
     // guest_state->cr0 = 0x00000001;    // PE 
   
@@ -156,7 +155,7 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
     ctrl_area->instrs.NMI = 1;
     ctrl_area->instrs.SMI = 0; // allow SMIs to run in guest
     ctrl_area->instrs.INIT = 1;
-    ctrl_area->instrs.PAUSE = 1;
+    //    ctrl_area->instrs.PAUSE = 1;
     ctrl_area->instrs.shutdown_evts = 1;
 
 
@@ -311,6 +310,28 @@ static void Init_VMCB_BIOS(vmcb_t * vmcb, struct guest_info * core) {
        &v3_handle_vm_cr_read,
        &v3_handle_vm_cr_write, 
        core);
+
+
+    {
+#define INT_PENDING_AMD_MSR            0xc0010055
+
+       v3_hook_msr(core->vm_info, IA32_STAR_MSR, NULL, NULL, NULL);
+       v3_hook_msr(core->vm_info, IA32_LSTAR_MSR, NULL, NULL, NULL);
+       v3_hook_msr(core->vm_info, IA32_FMASK_MSR, NULL, NULL, NULL);
+       v3_hook_msr(core->vm_info, IA32_KERN_GS_BASE_MSR, NULL, NULL, NULL);
+       v3_hook_msr(core->vm_info, IA32_CSTAR_MSR, NULL, NULL, NULL);
+
+       v3_hook_msr(core->vm_info, SYSENTER_CS_MSR, NULL, NULL, NULL);
+       v3_hook_msr(core->vm_info, SYSENTER_ESP_MSR, NULL, NULL, NULL);
+       v3_hook_msr(core->vm_info, SYSENTER_EIP_MSR, NULL, NULL, NULL);
+
+
+       v3_hook_msr(core->vm_info, FS_BASE_MSR, NULL, NULL, NULL);
+       v3_hook_msr(core->vm_info, GS_BASE_MSR, NULL, NULL, NULL);
+
+       // Passthrough read operations are ok.
+       v3_hook_msr(core->vm_info, INT_PENDING_AMD_MSR, NULL, v3_msr_unhandled_write, NULL);
+    }
 }
 
 
@@ -496,6 +517,20 @@ static int update_irq_entry_state(struct guest_info * info) {
     return 0;
 }
 
+int 
+v3_svm_config_tsc_virtualization(struct guest_info * info) {
+    vmcb_ctrl_t * ctrl_area = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
+
+    if (info->time_state.time_flags & V3_TIME_TRAP_RDTSC) {
+       ctrl_area->instrs.RDTSC = 1;
+       ctrl_area->svm_instrs.RDTSCP = 1;
+    } else {
+       ctrl_area->instrs.RDTSC = 0;
+       ctrl_area->svm_instrs.RDTSCP = 0;
+        ctrl_area->TSC_OFFSET = v3_tsc_host_offset(&info->time_state);
+    }
+    return 0;
+}
 
 /* 
  * CAUTION and DANGER!!! 
@@ -509,20 +544,18 @@ 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)); 
     addr_t exit_code = 0, exit_info1 = 0, exit_info2 = 0;
-    sint64_t tsc_offset;
+    uint64_t guest_cycles = 0;
 
     // Conditionally yield the CPU if the timeslice has expired
     v3_yield_cond(info);
 
-    // Perform any additional yielding needed for time adjustment
-    v3_adjust_time(info);
-
     // disable global interrupts for vm state transition
     v3_clgi();
 
     // 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_advance_time(info);
     v3_update_timers(info);
 
     // Synchronize the guest state to the VMCB
@@ -536,6 +569,12 @@ int v3_svm_enter(struct guest_info * info) {
     guest_state->rflags = info->ctrl_regs.rflags;
     guest_state->efer = info->ctrl_regs.efer;
     
+    /* Synchronize MSRs */
+    guest_state->star = info->msrs.star;
+    guest_state->lstar = info->msrs.lstar;
+    guest_state->sfmask = info->msrs.sfmask;
+    guest_state->KernelGsBase = info->msrs.kern_gs_base;
+
     guest_state->cpl = info->cpl;
 
     v3_set_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
@@ -570,20 +609,29 @@ int v3_svm_enter(struct guest_info * info) {
 #endif
 
     v3_time_enter_vm(info);
-    tsc_offset = v3_tsc_host_offset(&info->time_state);
-    guest_ctrl->TSC_OFFSET = tsc_offset;
-
+    v3_svm_config_tsc_virtualization(info);
 
     //V3_Print("Calling v3_svm_launch\n");
+    {  
+       uint64_t entry_tsc = 0;
+       uint64_t exit_tsc = 0;
+       
+       rdtscll(entry_tsc);
+
+       v3_svm_launch((vmcb_t *)V3_PAddr(info->vmm_data), &(info->vm_regs), (vmcb_t *)host_vmcbs[V3_Get_CPU()]);
+
+       rdtscll(exit_tsc);
+
+       guest_cycles = exit_tsc - entry_tsc;
+    }
 
-    v3_svm_launch((vmcb_t *)V3_PAddr(info->vmm_data), &(info->vm_regs), (vmcb_t *)host_vmcbs[V3_Get_CPU()]);
 
     //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);
 
     // Immediate exit from VM time bookkeeping
-    v3_time_exit_vm(info);
+    v3_time_exit_vm(info, &guest_cycles);
 
     info->num_exits++;
 
@@ -604,6 +652,12 @@ int v3_svm_enter(struct guest_info * info) {
     info->ctrl_regs.rflags = guest_state->rflags;
     info->ctrl_regs.efer = guest_state->efer;
     
+    /* Synchronize MSRs */
+    info->msrs.star =  guest_state->star;
+    info->msrs.lstar = guest_state->lstar;
+    info->msrs.sfmask = guest_state->sfmask;
+    info->msrs.kern_gs_base = guest_state->KernelGsBase;
+
     v3_get_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
     info->cpu_mode = v3_get_vm_cpu_mode(info);
     info->mem_mode = v3_get_vm_mem_mode(info);
@@ -638,6 +692,11 @@ int v3_svm_enter(struct guest_info * info) {
        }
     }
 
+    if (info->timeouts.timeout_active) {
+       /* Check to see if any timeouts have expired */
+       v3_handle_timeouts(info, guest_cycles);
+    }
+
 
     return 0;
 }
@@ -651,11 +710,16 @@ int v3_start_svm_guest(struct guest_info * info) {
 
     if (info->vcpu_id == 0) {
        info->core_run_state = CORE_RUNNING;
-       info->vm_info->run_state = VM_RUNNING;
     } else  { 
        PrintDebug("SVM core %u (on %u): Waiting for core initialization\n", info->vcpu_id, info->pcpu_id);
 
        while (info->core_run_state == CORE_STOPPED) {
+           
+           if (info->vm_info->run_state == VM_STOPPED) {
+               // The VM was stopped before this core was initialized. 
+               return 0;
+           }
+
            v3_yield(info);
            //PrintDebug("SVM core %u: still waiting for INIT\n", info->vcpu_id);
        }