{"id":806340,"url":"http://patchwork.ozlabs.org/api/1.0/patches/806340/?format=json","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.0/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20170828015654.2530-12-Sergio.G.DelReal@gmail.com>","date":"2017-08-28T01:56:51","name":"[11/14] hvf: implement vga dirty page tracking","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"cdcb0dbced229c58f34706729aed6c3e6a8395e7","submitter":{"id":70675,"url":"http://patchwork.ozlabs.org/api/1.0/people/70675/?format=json","name":"Sergio Andres Gomez Del Real","email":"sergio.g.delreal@gmail.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20170828015654.2530-12-Sergio.G.DelReal@gmail.com/mbox/","series":[{"id":56,"url":"http://patchwork.ozlabs.org/api/1.0/series/56/?format=json","date":"2017-08-28T01:56:40","name":"add support for Hypervisor.framework in QEMU","version":1,"mbox":"http://patchwork.ozlabs.org/series/56/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/806340/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; 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It uses the MemoryListener callback\nmechanism through .log_start/stop/sync\n\nSigned-off-by: Sergio Andres Gomez Del Real \n---\n include/sysemu/hvf.h | 5 ++++\n target/i386/hvf-all.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++-----\n 2 files changed, 70 insertions(+), 7 deletions(-)","diff":"diff --git a/include/sysemu/hvf.h b/include/sysemu/hvf.h\nindex 5b92769b16..90e9ec174e 100644\n--- a/include/sysemu/hvf.h\n+++ b/include/sysemu/hvf.h\n@@ -27,11 +27,16 @@\n #include \n #endif\n \n+/* hvf_slot flags */\n+#define HVF_SLOT_LOG (1 << 0)\n+\n typedef struct hvf_slot {\n uint64_t start;\n uint64_t size;\n uint8_t *mem;\n int slot_id;\n+ uint32_t flags;\n+ MemoryRegion *region;\n } hvf_slot;\n \n struct hvf_vcpu_caps {\ndiff --git a/target/i386/hvf-all.c b/target/i386/hvf-all.c\nindex 11d20671f7..20c796089d 100644\n--- a/target/i386/hvf-all.c\n+++ b/target/i386/hvf-all.c\n@@ -172,6 +172,7 @@ void hvf_set_phys_mem(MemoryRegionSection *section, bool add)\n mem->size = int128_get64(section->size);\n mem->mem = memory_region_get_ram_ptr(area) + section->offset_within_region;\n mem->start = section->offset_within_address_space;\n+ mem->region = area;\n \n if (do_hvf_set_memory(mem)) {\n fprintf(stderr, \"Error registering new memory slot\\n\");\n@@ -441,8 +442,7 @@ void hvf_cpu_synchronize_post_init(CPUState *cpu_state)\n run_on_cpu(cpu_state, _hvf_cpu_synchronize_post_init, RUN_ON_CPU_NULL);\n }\n \n-/* TODO: ept fault handlig */\n-static bool ept_emulation_fault(uint64_t ept_qual)\n+static bool ept_emulation_fault(hvf_slot *slot, addr_t gpa, uint64_t ept_qual)\n {\n int read, write;\n \n@@ -458,6 +458,14 @@ static bool ept_emulation_fault(uint64_t ept_qual)\n return false;\n }\n \n+ if (write && slot) {\n+ if (slot->flags & HVF_SLOT_LOG) {\n+ memory_region_set_dirty(slot->region, gpa - slot->start, 1);\n+ hv_vm_protect((hv_gpaddr_t)slot->start, (size_t)slot->size,\n+ HV_MEMORY_READ | HV_MEMORY_WRITE);\n+ }\n+ }\n+\n /*\n * The EPT violation must have been caused by accessing a\n * guest-physical address that is a translation of a guest-linear\n@@ -468,7 +476,57 @@ static bool ept_emulation_fault(uint64_t ept_qual)\n return false;\n }\n \n- return true;\n+ return !slot;\n+}\n+\n+static void hvf_set_dirty_tracking(MemoryRegionSection *section, bool on)\n+{\n+ struct mac_slot *macslot;\n+ hvf_slot *slot;\n+\n+ slot = hvf_find_overlap_slot(\n+ section->offset_within_address_space,\n+ section->offset_within_address_space + int128_get64(section->size));\n+\n+ /* protect region against writes; begin tracking it */\n+ if (on) {\n+ slot->flags |= HVF_SLOT_LOG;\n+ hv_vm_protect((hv_gpaddr_t)slot->start, (size_t)slot->size,\n+ HV_MEMORY_READ);\n+ /* stop tracking region*/\n+ } else {\n+ slot->flags &= ~HVF_SLOT_LOG;\n+ hv_vm_protect((hv_gpaddr_t)slot->start, (size_t)slot->size,\n+ HV_MEMORY_READ | HV_MEMORY_WRITE);\n+ }\n+}\n+\n+static void hvf_log_start(MemoryListener *listener,\n+ MemoryRegionSection *section, int old, int new)\n+{\n+ if (old != 0)\n+ return;\n+\n+ hvf_set_dirty_tracking(section, 1);\n+}\n+\n+static void hvf_log_stop(MemoryListener *listener,\n+ MemoryRegionSection *section, int old, int new)\n+{\n+ if (new != 0)\n+ return;\n+\n+ hvf_set_dirty_tracking(section, 0);\n+}\n+\n+static void hvf_log_sync(MemoryListener *listener,\n+ MemoryRegionSection *section)\n+{\n+ /*\n+ * sync of dirty pages is handled elsewhere; just make sure we keep\n+ * tracking the region.\n+ */\n+ hvf_set_dirty_tracking(section, 1);\n }\n \n static void hvf_region_add(MemoryListener *listener,\n@@ -487,6 +545,9 @@ static MemoryListener hvf_memory_listener = {\n .priority = 10,\n .region_add = hvf_region_add,\n .region_del = hvf_region_del,\n+ .log_start = hvf_log_start,\n+ .log_stop = hvf_log_stop,\n+ .log_sync = hvf_log_sync,\n };\n \n void vmx_reset_vcpu(CPUState *cpu) {\n@@ -763,7 +824,7 @@ int hvf_vcpu_exec(CPUState *cpu)\n \n slot = hvf_find_overlap_slot(gpa, gpa);\n /* mmio */\n- if (ept_emulation_fault(exit_qual) && !slot) {\n+ if (ept_emulation_fault(slot, gpa, exit_qual)) {\n struct x86_decode decode;\n \n load_regs(cpu);\n@@ -774,9 +835,6 @@ int hvf_vcpu_exec(CPUState *cpu)\n store_regs(cpu);\n break;\n }\n-#ifdef DIRTY_VGA_TRACKING\n- /* TODO: handle dirty page tracking */\n-#endif\n break;\n }\n case EXIT_REASON_INOUT:\n","prefixes":["11/14"]}