X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmx_msr.c;h=bb70fa7ef50de4fd83e398e70c4069653c8423d6;hb=c900a49cfd8ff982a35bb7385fbd927e961569a0;hp=f470c37d90198fd4e26aae7e406d1f55cc8e1d23;hpb=5e5c8ee949fa45116d58b904fc11aab082f61607;p=palacios.git

diff --git a/palacios/src/palacios/vmx_msr.c b/palacios/src/palacios/vmx_msr.c
index f470c37..bb70fa7 100644
--- a/palacios/src/palacios/vmx_msr.c
+++ b/palacios/src/palacios/vmx_msr.c
@@ -51,6 +51,12 @@ static int update_map(struct v3_vm_info * vm, uint_t msr, int hook_reads, int ho
     uint8_t write_val = (hook_writes) ? 0x1 : 0x0;
     uint8_t * bitmap = (uint8_t *)(vm->msr_map.arch_data);
 
+    if (index == -1) {
+	//	0rintError("Error updating MSR Map failed bitmap index for (0x%x)\n", msr);
+	// MSRs not in the bitmap covered range will always trigger exits, so we don't need to worry about them here.
+	return 0;
+    }
+
     *(bitmap + major) &= ~(mask << minor);
     *(bitmap + major) |= (read_val << minor);
 
@@ -61,11 +67,18 @@ static int update_map(struct v3_vm_info * vm, uint_t msr, int hook_reads, int ho
 }
 
 int v3_init_vmx_msr_map(struct v3_vm_info * vm) {
+    void *temp;
+
     struct v3_msr_map * msr_map = &(vm->msr_map);
 
     msr_map->update_map = update_map;
     
-    msr_map->arch_data = V3_VAddr(V3_AllocPages(1));
+    temp = V3_AllocPages(1);
+    if (!temp) { 
+	PrintError("Cannot allocat MSR bitmap\n");
+	return -1;
+    }
+    msr_map->arch_data = V3_VAddr(temp);
     memset(msr_map->arch_data, 0xff, PAGE_SIZE_4KB);
     
     v3_refresh_msr_map(vm);