diff options
| -rw-r--r-- | include/sysemu/hvf.h | 5 | ||||
| -rw-r--r-- | target/i386/hvf-all.c | 73 |
2 files changed, 71 insertions, 7 deletions
diff --git a/include/sysemu/hvf.h b/include/sysemu/hvf.h index 614a2d203b..e4e43f6468 100644 --- a/include/sysemu/hvf.h +++ b/include/sysemu/hvf.h @@ -34,11 +34,16 @@ uint32_t hvf_get_supported_cpuid(uint32_t func, uint32_t idx, #define hvf_get_supported_cpuid(func, idx, reg) 0 #endif +/* hvf_slot flags */ +#define HVF_SLOT_LOG (1 << 0) + typedef struct hvf_slot { uint64_t start; uint64_t size; uint8_t *mem; int slot_id; + uint32_t flags; + MemoryRegion *region; } hvf_slot; typedef struct hvf_vcpu_caps { diff --git a/target/i386/hvf-all.c b/target/i386/hvf-all.c index ddeadac176..b63dd5599e 100644 --- a/target/i386/hvf-all.c +++ b/target/i386/hvf-all.c @@ -193,6 +193,7 @@ void hvf_set_phys_mem(MemoryRegionSection *section, bool add) 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"); @@ -289,8 +290,7 @@ void hvf_cpu_synchronize_post_init(CPUState *cpu_state) 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; @@ -306,6 +306,14 @@ static bool ept_emulation_fault(uint64_t ept_qual) 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 @@ -316,7 +324,58 @@ static bool ept_emulation_fault(uint64_t ept_qual) 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, @@ -335,6 +394,9 @@ static MemoryListener hvf_memory_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) { @@ -607,7 +669,7 @@ int hvf_vcpu_exec(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); @@ -618,9 +680,6 @@ int hvf_vcpu_exec(CPUState *cpu) store_regs(cpu); break; } -#ifdef DIRTY_VGA_TRACKING - /* TODO: handle dirty page tracking */ -#endif break; } case EXIT_REASON_INOUT: |