Time configuration parameters added. More time control code prototyped,

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

diff --git a/palacios/src/palacios/vmx.c b/palacios/src/palacios/vmx.c
index d2e3a79..16fc5cd 100644 (file)
--- a/palacios/src/palacios/vmx.c
+++ b/palacios/src/palacios/vmx.c
@@ -33,6 +33,13 @@
 #include <palacios/vmx_io.h>
 #include <palacios/vmx_msr.h>
 
+
+#ifndef CONFIG_DEBUG_VMX
+#undef PrintDebug
+#define PrintDebug(fmt, args...)
+#endif
+
+
 static addr_t host_vmcs_ptrs[CONFIG_MAX_CPUS] = { [0 ... CONFIG_MAX_CPUS - 1] = 0};
 
 
@@ -218,6 +225,9 @@ static int init_vmcs_bios(struct guest_info * info, struct vmx_data * vmx_state)
     vmx_state->pri_proc_ctrls.invlpg_exit = 1;
     vmx_state->pri_proc_ctrls.use_msr_bitmap = 1;
     vmx_state->pri_proc_ctrls.pause_exit = 1;
+#ifdef CONFIG_TIME_TSC_OFFSET
+    vmx_state->pri_proc_ctrls.tsc_offset = 1;
+#endif
 
     vmx_ret |= check_vmcs_write(VMCS_IO_BITMAP_A_ADDR, (addr_t)V3_PAddr(info->vm_info->io_map.arch_data));
     vmx_ret |= check_vmcs_write(VMCS_IO_BITMAP_B_ADDR, 
@@ -341,7 +351,7 @@ static int init_vmcs_bios(struct guest_info * info, struct vmx_data * vmx_state)
 #define VMXASSIST_GDT   0x10000
        addr_t vmxassist_gdt = 0;
 
-       if (guest_pa_to_host_va(info, VMXASSIST_GDT, &vmxassist_gdt) == -1) {
+       if (v3_gpa_to_hva(info, VMXASSIST_GDT, &vmxassist_gdt) == -1) {
            PrintError("Could not find VMXASSIST GDT destination\n");
            return -1;
        }
@@ -375,7 +385,7 @@ static int init_vmcs_bios(struct guest_info * info, struct vmx_data * vmx_state)
        extern uint8_t v3_vmxassist_end[];
        addr_t vmxassist_dst = 0;
 
-       if (guest_pa_to_host_va(info, VMXASSIST_START, &vmxassist_dst) == -1) {
+       if (v3_gpa_to_hva(info, VMXASSIST_START, &vmxassist_dst) == -1) {
            PrintError("Could not find VMXASSIST destination\n");
            return -1;
        }
@@ -629,13 +639,12 @@ static void print_exit_log(struct guest_info * info) {
  */
 int v3_vmx_enter(struct guest_info * info) {
     int ret = 0;
-    uint64_t tmp_tsc = 0;
+    uint32_t tsc_offset_low, tsc_offset_high;
     struct vmx_exit_info exit_info;
 
     // Conditionally yield the CPU if the timeslice has expired
     v3_yield_cond(info);
 
-
     // v3_print_guest_state(info);
 
     // disable global interrupts for vm state transition
@@ -658,12 +667,19 @@ int v3_vmx_enter(struct guest_info * info) {
        vmcs_write(VMCS_GUEST_CR3, guest_cr3);
     }
 
-    // We do timer injection here to track real host time.
-    rdtscll(tmp_tsc);
-    v3_update_time(info, tmp_tsc - info->time_state.cached_host_tsc);
-    info->time_state.cached_hlt_tsc = 0;
-    rdtscll(info->time_state.cached_host_tsc);
+    v3_update_timers(info);
+    v3_resume_time(info);
 
+    tsc_offset_high = 
+       (uint32_t)((info->time_state.host_offset >> 32) & 0xffffffff);
+    tsc_offset_low = (uint32_t)(info->time_state.host_offset & 0xffffffff);
+#ifdef CONFIG_TIME_TSC_OFFSET
+    check_vmcs_write(VMCS_TSC_OFFSET_HIGH, tsc_offset_high);
+    check_vmcs_write(VMCS_TSC_OFFSET, tsc_offset_low);
+#endif
+
+    PrintDebug("Stored 0x %x %x into vmcs TSC offset.\n", 
+              tsc_offset_high, tsc_offset_low);
     if (info->vm_info->run_state == VM_STOPPED) {
        info->vm_info->run_state = VM_RUNNING;
        ret = v3_vmx_launch(&(info->vm_regs), info, &(info->ctrl_regs));
@@ -682,12 +698,13 @@ int v3_vmx_enter(struct guest_info * info) {
        return -1;
     }
 
-    //   rdtscll(tmp_tsc);
-    //    v3_update_time(info, tmp_tsc - info->time_state.cached_host_tsc);
+    v3_pause_time(info);
+#ifdef CONFIG_TIME_MASK_OVERHEAD
+    v3_offset_time(info, -VMX_ENTRY_OVERHEAD);
+#endif
 
     info->num_exits++;
 
-
     /* Update guest state */
     v3_vmx_save_vmcs(info);
 
@@ -738,8 +755,7 @@ int v3_start_vmx_guest(struct guest_info* info) {
 
     PrintDebug("Launching VMX guest\n");
 
-    rdtscll(info->time_state.cached_host_tsc);
-
+    v3_start_time(info);
 
     while (1) {
        if (v3_vmx_enter(info) == -1) {