if( (msr >= LOW_MSR_START) && msr <= LOW_MSR_END) {
return LOW_MSR_INDEX + msr;
} else if (( msr >= HIGH_MSR_START ) && (msr <= HIGH_MSR_END)) {
- return HIGH_MSR_INDEX + (msr - HIGH_MSR_START);
+ return (HIGH_MSR_INDEX * 8) + (msr - HIGH_MSR_START);
} else {
PrintError("MSR out of range: 0x%x\n", msr);
return -1;
/* Same as SVM */
static int update_map(struct v3_vm_info * vm, uint_t msr, int hook_reads, int hook_writes) {
-
int index = get_bitmap_index(msr);
uint_t major = index / 8;
uint_t minor = (index % 8);
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);
-
*(bitmap + 2048 + major) &= ~(mask << minor);
*(bitmap + 2048 + major) |= (write_val << minor);
-
+
return 0;
}
msr_map->update_map = update_map;
msr_map->arch_data = V3_VAddr(V3_AllocPages(1));
- memset(msr_map->arch_data, 0, PAGE_SIZE_4KB);
+ memset(msr_map->arch_data, 0xff, PAGE_SIZE_4KB);
v3_refresh_msr_map(vm);