mem->size = int128_get64(section->size);
mem->mem = memory_region_get_ram_ptr(area) + section->offset_within_region;
mem->start = section->offset_within_address_space;
+ mem->region = area;
if (do_hvf_set_memory(mem)) {
error_report("Error registering new memory slot\n");
run_on_cpu(cpu_state, _hvf_cpu_synchronize_post_init, RUN_ON_CPU_NULL);
}
-/* TODO: ept fault handlig */
-static bool ept_emulation_fault(uint64_t ept_qual)
+static bool ept_emulation_fault(hvf_slot *slot, addr_t gpa, uint64_t ept_qual)
{
int read, write;
return false;
}
+ if (write && slot) {
+ if (slot->flags & HVF_SLOT_LOG) {
+ memory_region_set_dirty(slot->region, gpa - slot->start, 1);
+ hv_vm_protect((hv_gpaddr_t)slot->start, (size_t)slot->size,
+ HV_MEMORY_READ | HV_MEMORY_WRITE);
+ }
+ }
+
/*
* The EPT violation must have been caused by accessing a
* guest-physical address that is a translation of a guest-linear
return false;
}
- return true;
+ return !slot;
+}
+
+static void hvf_set_dirty_tracking(MemoryRegionSection *section, bool on)
+{
+ hvf_slot *slot;
+
+ slot = hvf_find_overlap_slot(
+ section->offset_within_address_space,
+ section->offset_within_address_space + int128_get64(section->size));
+
+ /* protect region against writes; begin tracking it */
+ if (on) {
+ slot->flags |= HVF_SLOT_LOG;
+ hv_vm_protect((hv_gpaddr_t)slot->start, (size_t)slot->size,
+ HV_MEMORY_READ);
+ /* stop tracking region*/
+ } else {
+ slot->flags &= ~HVF_SLOT_LOG;
+ hv_vm_protect((hv_gpaddr_t)slot->start, (size_t)slot->size,
+ HV_MEMORY_READ | HV_MEMORY_WRITE);
+ }
+}
+
+static void hvf_log_start(MemoryListener *listener,
+ MemoryRegionSection *section, int old, int new)
+{
+ if (old != 0) {
+ return;
+ }
+
+ hvf_set_dirty_tracking(section, 1);
+}
+
+static void hvf_log_stop(MemoryListener *listener,
+ MemoryRegionSection *section, int old, int new)
+{
+ if (new != 0) {
+ return;
+ }
+
+ hvf_set_dirty_tracking(section, 0);
+}
+
+static void hvf_log_sync(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ /*
+ * sync of dirty pages is handled elsewhere; just make sure we keep
+ * tracking the region.
+ */
+ hvf_set_dirty_tracking(section, 1);
}
static void hvf_region_add(MemoryListener *listener,
.priority = 10,
.region_add = hvf_region_add,
.region_del = hvf_region_del,
+ .log_start = hvf_log_start,
+ .log_stop = hvf_log_stop,
+ .log_sync = hvf_log_sync,
};
void hvf_reset_vcpu(CPUState *cpu) {
slot = hvf_find_overlap_slot(gpa, gpa);
/* mmio */
- if (ept_emulation_fault(exit_qual) && !slot) {
+ if (ept_emulation_fault(slot, gpa, exit_qual)) {
struct x86_decode decode;
load_regs(cpu);
store_regs(cpu);
break;
}
-#ifdef DIRTY_VGA_TRACKING
- /* TODO: handle dirty page tracking */
-#endif
break;
}
case EXIT_REASON_INOUT: