added symbiotic interface and a number of other small changes

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

diff --git a/palacios/src/palacios/vmm_msr.c b/palacios/src/palacios/vmm_msr.c
index 5fe5ffd..de68a86 100644 (file)
--- a/palacios/src/palacios/vmm_msr.c
+++ b/palacios/src/palacios/vmm_msr.c
@@ -33,6 +33,60 @@ void v3_init_msr_map(struct guest_info * info) {
     msr_map->update_map = NULL;
 }
 
+int v3_handle_msr_write(struct guest_info * info) {
+    uint_t msr_num = info->vm_regs.rcx;
+    struct v3_msr msr_val;
+    struct v3_msr_hook * hook = NULL;
+
+    PrintDebug("MSR write for msr 0x%x\n", msr_num);
+
+    hook = v3_get_msr_hook(info, msr_num);
+
+    if (!hook) {
+        PrintError("Hook for MSR write %d not found\n", msr_num);
+        return -1;
+    }
+
+    msr_val.value = 0;
+    msr_val.lo = info->vm_regs.rax;
+    msr_val.hi = info->vm_regs.rdx;
+
+    if (hook->write(msr_num, msr_val, hook->priv_data) == -1) {
+        PrintError("Error in MSR hook Write\n");
+        return -1;
+    }
+
+    info->rip += 2;
+
+    return 0;
+}
+
+
+int v3_handle_msr_read(struct guest_info * info) {
+    uint_t msr_num = info->vm_regs.rcx;
+    struct v3_msr msr_val;
+    struct v3_msr_hook * hook = NULL;
+
+    hook = v3_get_msr_hook(info, msr_num);
+
+    if (!hook) {
+        PrintError("Hook for MSR read %d not found\n", msr_num);
+        return -1;
+    }
+
+    msr_val.value = 0;
+
+    if (hook->read(msr_num, &msr_val, hook->priv_data) == -1) {
+        PrintError("Error in MSR hook Read\n");
+        return -1;
+    }
+
+    info->vm_regs.rax = msr_val.lo;
+    info->vm_regs.rdx = msr_val.hi;
+
+    info->rip += 2;
+    return 0;
+}
 
 int v3_hook_msr(struct guest_info * info, uint_t msr, 
                int (*read)(uint_t msr, struct v3_msr * dst, void * priv_data),
@@ -58,14 +112,18 @@ int v3_hook_msr(struct guest_info * info, uint_t msr,
 
     list_add(&(hook->link), &(msr_map->hook_list));
 
-    msr_map->update_map(info, msr, 
-                       (read == NULL) ? 0 : 1,
-                       (write == NULL) ? 0 : 1);
+    if (msr_map->update_map) {
+       msr_map->update_map(info, msr, 
+                           (read == NULL) ? 0 : 1,
+                           (write == NULL) ? 0 : 1);
+    }
+
     return 0;
 }
 
 
 int v3_unhook_msr(struct guest_info * info, uint_t msr) {
+    PrintError("Unhooking MSRs currently not supported\n");
     return -1;
 }
 
@@ -85,12 +143,29 @@ struct v3_msr_hook * v3_get_msr_hook(struct guest_info * info, uint_t msr) {
 }
 
 
+void v3_refresh_msr_map(struct guest_info * info) {
+    struct v3_msr_map * msr_map = &(info->msr_map);
+    struct v3_msr_hook * hook = NULL;
+
+    if (msr_map->update_map == NULL) {
+       PrintError("Trying to refresh an MSR map with no backend\n");
+       return;
+    }
+
+    list_for_each_entry(hook, &(msr_map->hook_list), link) {
+       PrintDebug("updating MSR map for msr %d\n", hook->msr);
+       msr_map->update_map(info, hook->msr,    
+                           (hook->read == NULL) ? 0 : 1,
+                           (hook->write == NULL) ? 0 : 1);
+    }
+}
+
 void v3_print_msr_map(struct guest_info * info) {
     struct v3_msr_map * msr_map = &(info->msr_map);
     struct v3_msr_hook * hook = NULL;
 
     list_for_each_entry(hook, &(msr_map->hook_list), link) {
-       PrintDebug("MSR HOOK (MSR=%d) (read=0x%p) (write=0x%p)\n",
+       V3_Print("MSR HOOK (MSR=0x%x) (read=0x%p) (write=0x%p)\n",
                   hook->msr, hook->read, hook->write);
     }
 }