Palacios Public Git Repository

To checkout Palacios execute

  git clone http://v3vee.org/palacios/palacios.web/palacios.git
This will give you the master branch. You probably want the devel branch or one of the release branches. To switch to the devel branch, simply execute
  cd palacios
  git checkout --track -b devel origin/devel
The other branches are similar.


correctly handle NMI exits on VMX architectures
[palacios.git] / palacios / src / palacios / vmx.c
index 3fede2b..c341982 100644 (file)
@@ -184,6 +184,7 @@ static int init_vmcs_bios(struct guest_info * core, struct vmx_data * vmx_state)
 
     /* Add external interrupts, NMI exiting, and virtual NMI */
     vmx_state->pin_ctrls.nmi_exit = 1;
+    vmx_state->pin_ctrls.virt_nmi = 1;
     vmx_state->pin_ctrls.ext_int_exit = 1;
 
 
@@ -195,10 +196,17 @@ static int init_vmcs_bios(struct guest_info * core, struct vmx_data * vmx_state)
        vmx_state->exit_ctrls.save_preempt_timer = 1;
     }
 
+    // we want it to use this when halting
     vmx_state->pri_proc_ctrls.hlt_exit = 1;
 
+    // cpuid tells it that it does not have these instructions
+    vmx_state->pri_proc_ctrls.monitor_exit = 1;
+    vmx_state->pri_proc_ctrls.mwait_exit = 1;
 
+    // we don't need to handle a pause, although this is where
+    // we could pull out of a spin lock acquire or schedule to find its partner
     vmx_state->pri_proc_ctrls.pause_exit = 0;
+
     vmx_state->pri_proc_ctrls.tsc_offset = 1;
 #ifdef V3_CONFIG_TIME_VIRTUALIZE_TSC
     vmx_state->pri_proc_ctrls.rdtsc_exit = 1;
@@ -1108,6 +1116,18 @@ int v3_vmx_enter(struct guest_info * info) {
 #endif
     }
 
+
+    // Lastly we check for an NMI exit, and reinject if so
+    {
+       struct vmx_basic_exit_info * basic_info = (struct vmx_basic_exit_info *)&(exit_info.exit_reason);
+
+       if (basic_info->reason == VMX_EXIT_INFO_EXCEPTION_OR_NMI) {
+           if ((uint8_t)exit_info.int_info == 2) {
+               asm("int $2");
+           }
+       }
+    }
+
     // reenable global interrupts after vm exit
     v3_enable_ints();