diff options
| -rw-r--r-- | docs/hyperv.txt | 15 | ||||
| -rw-r--r-- | hw/hyperv/hyperv.c | 243 | ||||
| -rw-r--r-- | include/hw/hyperv/hyperv.h | 58 | ||||
| -rw-r--r-- | target/i386/cpu.c | 2 | ||||
| -rw-r--r-- | target/i386/cpu.h | 7 | ||||
| -rw-r--r-- | target/i386/kvm/hyperv-stub.c | 6 | ||||
| -rw-r--r-- | target/i386/kvm/hyperv.c | 52 | ||||
| -rw-r--r-- | target/i386/kvm/kvm.c | 76 |
8 files changed, 451 insertions, 8 deletions
diff --git a/docs/hyperv.txt b/docs/hyperv.txt index 0417c18..33588a0 100644 --- a/docs/hyperv.txt +++ b/docs/hyperv.txt @@ -225,6 +225,21 @@ default (WS2016). Note: hv-version-id-* are not enlightenments and thus don't enable Hyper-V identification when specified without any other enlightenments. +3.21. hv-syndbg +=============== +Enables Hyper-V synthetic debugger interface, this is a special interface used +by Windows Kernel debugger to send the packets through, rather than sending +them via serial/network . +When enabled, this enlightenment provides additional communication facilities +to the guest: SynDbg messages. +This new communication is used by Windows Kernel debugger rather than sending +packets via serial/network, adding significant performance boost over the other +comm channels. +This enlightenment requires a VMBus device (-device vmbus-bridge,irq=15) +and the follow enlightenments to work: +hv-relaxed,hv_time,hv-vapic,hv-vpindex,hv-synic,hv-runtime,hv-stimer + + 4. Supplementary features ========================= diff --git a/hw/hyperv/hyperv.c b/hw/hyperv/hyperv.c index 8b83256..4a1b59c 100644 --- a/hw/hyperv/hyperv.c +++ b/hw/hyperv/hyperv.c @@ -704,3 +704,246 @@ uint16_t hyperv_hcall_signal_event(uint64_t param, bool fast) } return HV_STATUS_INVALID_CONNECTION_ID; } + +static HvSynDbgHandler hv_syndbg_handler; +static void *hv_syndbg_context; + +void hyperv_set_syndbg_handler(HvSynDbgHandler handler, void *context) +{ + assert(!hv_syndbg_handler); + hv_syndbg_handler = handler; + hv_syndbg_context = context; +} + +uint16_t hyperv_hcall_reset_dbg_session(uint64_t outgpa) +{ + uint16_t ret; + HvSynDbgMsg msg; + struct hyperv_reset_debug_session_output *reset_dbg_session = NULL; + hwaddr len; + + if (!hv_syndbg_handler) { + ret = HV_STATUS_INVALID_HYPERCALL_CODE; + goto cleanup; + } + + len = sizeof(*reset_dbg_session); + reset_dbg_session = cpu_physical_memory_map(outgpa, &len, 1); + if (!reset_dbg_session || len < sizeof(*reset_dbg_session)) { + ret = HV_STATUS_INSUFFICIENT_MEMORY; + goto cleanup; + } + + msg.type = HV_SYNDBG_MSG_CONNECTION_INFO; + ret = hv_syndbg_handler(hv_syndbg_context, &msg); + if (ret) { + goto cleanup; + } + + reset_dbg_session->host_ip = msg.u.connection_info.host_ip; + reset_dbg_session->host_port = msg.u.connection_info.host_port; + /* The following fields are only used as validation for KDVM */ + memset(&reset_dbg_session->host_mac, 0, + sizeof(reset_dbg_session->host_mac)); + reset_dbg_session->target_ip = msg.u.connection_info.host_ip; + reset_dbg_session->target_port = msg.u.connection_info.host_port; + memset(&reset_dbg_session->target_mac, 0, + sizeof(reset_dbg_session->target_mac)); +cleanup: + if (reset_dbg_session) { + cpu_physical_memory_unmap(reset_dbg_session, + sizeof(*reset_dbg_session), 1, len); + } + + return ret; +} + +uint16_t hyperv_hcall_retreive_dbg_data(uint64_t ingpa, uint64_t outgpa, + bool fast) +{ + uint16_t ret; + struct hyperv_retrieve_debug_data_input *debug_data_in = NULL; + struct hyperv_retrieve_debug_data_output *debug_data_out = NULL; + hwaddr in_len, out_len; + HvSynDbgMsg msg; + + if (fast || !hv_syndbg_handler) { + ret = HV_STATUS_INVALID_HYPERCALL_CODE; + goto cleanup; + } + + in_len = sizeof(*debug_data_in); + debug_data_in = cpu_physical_memory_map(ingpa, &in_len, 0); + if (!debug_data_in || in_len < sizeof(*debug_data_in)) { + ret = HV_STATUS_INSUFFICIENT_MEMORY; + goto cleanup; + } + + out_len = sizeof(*debug_data_out); + debug_data_out = cpu_physical_memory_map(outgpa, &out_len, 1); + if (!debug_data_out || out_len < sizeof(*debug_data_out)) { + ret = HV_STATUS_INSUFFICIENT_MEMORY; + goto cleanup; + } + + msg.type = HV_SYNDBG_MSG_RECV; + msg.u.recv.buf_gpa = outgpa + sizeof(*debug_data_out); + msg.u.recv.count = TARGET_PAGE_SIZE - sizeof(*debug_data_out); + msg.u.recv.options = debug_data_in->options; + msg.u.recv.timeout = debug_data_in->timeout; + msg.u.recv.is_raw = true; + ret = hv_syndbg_handler(hv_syndbg_context, &msg); + if (ret == HV_STATUS_NO_DATA) { + debug_data_out->retrieved_count = 0; + debug_data_out->remaining_count = debug_data_in->count; + goto cleanup; + } else if (ret != HV_STATUS_SUCCESS) { + goto cleanup; + } + + debug_data_out->retrieved_count = msg.u.recv.retrieved_count; + debug_data_out->remaining_count = + debug_data_in->count - msg.u.recv.retrieved_count; +cleanup: + if (debug_data_out) { + cpu_physical_memory_unmap(debug_data_out, sizeof(*debug_data_out), 1, + out_len); + } + + if (debug_data_in) { + cpu_physical_memory_unmap(debug_data_in, sizeof(*debug_data_in), 0, + in_len); + } + + return ret; +} + +uint16_t hyperv_hcall_post_dbg_data(uint64_t ingpa, uint64_t outgpa, bool fast) +{ + uint16_t ret; + struct hyperv_post_debug_data_input *post_data_in = NULL; + struct hyperv_post_debug_data_output *post_data_out = NULL; + hwaddr in_len, out_len; + HvSynDbgMsg msg; + + if (fast || !hv_syndbg_handler) { + ret = HV_STATUS_INVALID_HYPERCALL_CODE; + goto cleanup; + } + + in_len = sizeof(*post_data_in); + post_data_in = cpu_physical_memory_map(ingpa, &in_len, 0); + if (!post_data_in || in_len < sizeof(*post_data_in)) { + ret = HV_STATUS_INSUFFICIENT_MEMORY; + goto cleanup; + } + + if (post_data_in->count > TARGET_PAGE_SIZE - sizeof(*post_data_in)) { + ret = HV_STATUS_INVALID_PARAMETER; + goto cleanup; + } + + out_len = sizeof(*post_data_out); + post_data_out = cpu_physical_memory_map(outgpa, &out_len, 1); + if (!post_data_out || out_len < sizeof(*post_data_out)) { + ret = HV_STATUS_INSUFFICIENT_MEMORY; + goto cleanup; + } + + msg.type = HV_SYNDBG_MSG_SEND; + msg.u.send.buf_gpa = ingpa + sizeof(*post_data_in); + msg.u.send.count = post_data_in->count; + msg.u.send.is_raw = true; + ret = hv_syndbg_handler(hv_syndbg_context, &msg); + if (ret != HV_STATUS_SUCCESS) { + goto cleanup; + } + + post_data_out->pending_count = msg.u.send.pending_count; + ret = post_data_out->pending_count ? HV_STATUS_INSUFFICIENT_BUFFERS : + HV_STATUS_SUCCESS; +cleanup: + if (post_data_out) { + cpu_physical_memory_unmap(post_data_out, + sizeof(*post_data_out), 1, out_len); + } + + if (post_data_in) { + cpu_physical_memory_unmap(post_data_in, + sizeof(*post_data_in), 0, in_len); + } + + return ret; +} + +uint32_t hyperv_syndbg_send(uint64_t ingpa, uint32_t count) +{ + HvSynDbgMsg msg; + + if (!hv_syndbg_handler) { + return HV_SYNDBG_STATUS_INVALID; + } + + msg.type = HV_SYNDBG_MSG_SEND; + msg.u.send.buf_gpa = ingpa; + msg.u.send.count = count; + msg.u.send.is_raw = false; + if (hv_syndbg_handler(hv_syndbg_context, &msg)) { + return HV_SYNDBG_STATUS_INVALID; + } + + return HV_SYNDBG_STATUS_SEND_SUCCESS; +} + +uint32_t hyperv_syndbg_recv(uint64_t ingpa, uint32_t count) +{ + uint16_t ret; + HvSynDbgMsg msg; + + if (!hv_syndbg_handler) { + return HV_SYNDBG_STATUS_INVALID; + } + + msg.type = HV_SYNDBG_MSG_RECV; + msg.u.recv.buf_gpa = ingpa; + msg.u.recv.count = count; + msg.u.recv.options = 0; + msg.u.recv.timeout = 0; + msg.u.recv.is_raw = false; + ret = hv_syndbg_handler(hv_syndbg_context, &msg); + if (ret != HV_STATUS_SUCCESS) { + return 0; + } + + return HV_SYNDBG_STATUS_SET_SIZE(HV_SYNDBG_STATUS_RECV_SUCCESS, + msg.u.recv.retrieved_count); +} + +void hyperv_syndbg_set_pending_page(uint64_t ingpa) +{ + HvSynDbgMsg msg; + + if (!hv_syndbg_handler) { + return; + } + + msg.type = HV_SYNDBG_MSG_SET_PENDING_PAGE; + msg.u.pending_page.buf_gpa = ingpa; + hv_syndbg_handler(hv_syndbg_context, &msg); +} + +uint64_t hyperv_syndbg_query_options(void) +{ + HvSynDbgMsg msg; + + if (!hv_syndbg_handler) { + return 0; + } + + msg.type = HV_SYNDBG_MSG_QUERY_OPTIONS; + if (hv_syndbg_handler(hv_syndbg_context, &msg) != HV_STATUS_SUCCESS) { + return 0; + } + + return msg.u.query_options.options; +} diff --git a/include/hw/hyperv/hyperv.h b/include/hw/hyperv/hyperv.h index a63ee00..015c352 100644 --- a/include/hw/hyperv/hyperv.h +++ b/include/hw/hyperv/hyperv.h @@ -81,4 +81,62 @@ void hyperv_synic_update(CPUState *cs, bool enable, hwaddr msg_page_addr, hwaddr event_page_addr); bool hyperv_is_synic_enabled(void); +/* + * Process HVCALL_RESET_DEBUG_SESSION hypercall. + */ +uint16_t hyperv_hcall_reset_dbg_session(uint64_t outgpa); +/* + * Process HVCALL_RETREIVE_DEBUG_DATA hypercall. + */ +uint16_t hyperv_hcall_retreive_dbg_data(uint64_t ingpa, uint64_t outgpa, + bool fast); +/* + * Process HVCALL_POST_DEBUG_DATA hypercall. + */ +uint16_t hyperv_hcall_post_dbg_data(uint64_t ingpa, uint64_t outgpa, bool fast); + +uint32_t hyperv_syndbg_send(uint64_t ingpa, uint32_t count); +uint32_t hyperv_syndbg_recv(uint64_t ingpa, uint32_t count); +void hyperv_syndbg_set_pending_page(uint64_t ingpa); +uint64_t hyperv_syndbg_query_options(void); + +typedef enum HvSynthDbgMsgType { + HV_SYNDBG_MSG_CONNECTION_INFO, + HV_SYNDBG_MSG_SEND, + HV_SYNDBG_MSG_RECV, + HV_SYNDBG_MSG_SET_PENDING_PAGE, + HV_SYNDBG_MSG_QUERY_OPTIONS +} HvDbgSynthMsgType; + +typedef struct HvSynDbgMsg { + HvDbgSynthMsgType type; + union { + struct { + uint32_t host_ip; + uint16_t host_port; + } connection_info; + struct { + uint64_t buf_gpa; + uint32_t count; + uint32_t pending_count; + bool is_raw; + } send; + struct { + uint64_t buf_gpa; + uint32_t count; + uint32_t options; + uint64_t timeout; + uint32_t retrieved_count; + bool is_raw; + } recv; + struct { + uint64_t buf_gpa; + } pending_page; + struct { + uint64_t options; + } query_options; + } u; +} HvSynDbgMsg; +typedef uint16_t (*HvSynDbgHandler)(void *context, HvSynDbgMsg *msg); +void hyperv_set_syndbg_handler(HvSynDbgHandler handler, void *context); #endif diff --git a/target/i386/cpu.c b/target/i386/cpu.c index cb6b546..99343be 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6927,6 +6927,8 @@ static Property x86_cpu_properties[] = { HYPERV_FEAT_AVIC, 0), DEFINE_PROP_ON_OFF_AUTO("hv-no-nonarch-coresharing", X86CPU, hyperv_no_nonarch_cs, ON_OFF_AUTO_OFF), + DEFINE_PROP_BIT64("hv-syndbg", X86CPU, hyperv_features, + HYPERV_FEAT_SYNDBG, 0), DEFINE_PROP_BOOL("hv-passthrough", X86CPU, hyperv_passthrough, false), DEFINE_PROP_BOOL("hv-enforce-cpuid", X86CPU, hyperv_enforce_cpuid, false), diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 8422f6c..6b61124 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1085,6 +1085,7 @@ uint64_t x86_cpu_get_supported_feature_word(FeatureWord w, #define HYPERV_FEAT_IPI 13 #define HYPERV_FEAT_STIMER_DIRECT 14 #define HYPERV_FEAT_AVIC 15 +#define HYPERV_FEAT_SYNDBG 16 #ifndef HYPERV_SPINLOCK_NEVER_NOTIFY #define HYPERV_SPINLOCK_NEVER_NOTIFY 0xFFFFFFFF @@ -1601,6 +1602,12 @@ typedef struct CPUArchState { uint64_t msr_hv_hypercall; uint64_t msr_hv_guest_os_id; uint64_t msr_hv_tsc; + uint64_t msr_hv_syndbg_control; + uint64_t msr_hv_syndbg_status; + uint64_t msr_hv_syndbg_send_page; + uint64_t msr_hv_syndbg_recv_page; + uint64_t msr_hv_syndbg_pending_page; + uint64_t msr_hv_syndbg_options; /* Per-VCPU HV MSRs */ uint64_t msr_hv_vapic; diff --git a/target/i386/kvm/hyperv-stub.c b/target/i386/kvm/hyperv-stub.c index 0028527..778ed78 100644 --- a/target/i386/kvm/hyperv-stub.c +++ b/target/i386/kvm/hyperv-stub.c @@ -28,6 +28,12 @@ int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit) case KVM_EXIT_HYPERV_HCALL: exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE; return 0; + case KVM_EXIT_HYPERV_SYNDBG: + if (!hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) { + return -1; + } + + return 0; default: return -1; } diff --git a/target/i386/kvm/hyperv.c b/target/i386/kvm/hyperv.c index 26efc1e..9026ef3 100644 --- a/target/i386/kvm/hyperv.c +++ b/target/i386/kvm/hyperv.c @@ -81,20 +81,66 @@ int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit) case KVM_EXIT_HYPERV_HCALL: { uint16_t code = exit->u.hcall.input & 0xffff; bool fast = exit->u.hcall.input & HV_HYPERCALL_FAST; - uint64_t param = exit->u.hcall.params[0]; + uint64_t in_param = exit->u.hcall.params[0]; + uint64_t out_param = exit->u.hcall.params[1]; switch (code) { case HV_POST_MESSAGE: - exit->u.hcall.result = hyperv_hcall_post_message(param, fast); + exit->u.hcall.result = hyperv_hcall_post_message(in_param, fast); break; case HV_SIGNAL_EVENT: - exit->u.hcall.result = hyperv_hcall_signal_event(param, fast); + exit->u.hcall.result = hyperv_hcall_signal_event(in_param, fast); + break; + case HV_POST_DEBUG_DATA: + exit->u.hcall.result = + hyperv_hcall_post_dbg_data(in_param, out_param, fast); + break; + case HV_RETRIEVE_DEBUG_DATA: + exit->u.hcall.result = + hyperv_hcall_retreive_dbg_data(in_param, out_param, fast); + break; + case HV_RESET_DEBUG_SESSION: + exit->u.hcall.result = + hyperv_hcall_reset_dbg_session(out_param); break; default: exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE; } return 0; } + + case KVM_EXIT_HYPERV_SYNDBG: + if (!hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) { + return -1; + } + + switch (exit->u.syndbg.msr) { + case HV_X64_MSR_SYNDBG_CONTROL: { + uint64_t control = exit->u.syndbg.control; + env->msr_hv_syndbg_control = control; + env->msr_hv_syndbg_send_page = exit->u.syndbg.send_page; + env->msr_hv_syndbg_recv_page = exit->u.syndbg.recv_page; + exit->u.syndbg.status = HV_STATUS_SUCCESS; + if (control & HV_SYNDBG_CONTROL_SEND) { + exit->u.syndbg.status = + hyperv_syndbg_send(env->msr_hv_syndbg_send_page, + HV_SYNDBG_CONTROL_SEND_SIZE(control)); + } else if (control & HV_SYNDBG_CONTROL_RECV) { + exit->u.syndbg.status = + hyperv_syndbg_recv(env->msr_hv_syndbg_recv_page, + TARGET_PAGE_SIZE); + } + break; + } + case HV_X64_MSR_SYNDBG_PENDING_BUFFER: + env->msr_hv_syndbg_pending_page = exit->u.syndbg.pending_page; + hyperv_syndbg_set_pending_page(env->msr_hv_syndbg_pending_page); + break; + default: + return -1; + } + + return 0; default: return -1; } diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 9cf8e03..0bb3176 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -104,6 +104,7 @@ static bool has_msr_hv_synic; static bool has_msr_hv_stimer; static bool has_msr_hv_frequencies; static bool has_msr_hv_reenlightenment; +static bool has_msr_hv_syndbg_options; static bool has_msr_xss; static bool has_msr_umwait; static bool has_msr_spec_ctrl; @@ -964,6 +965,14 @@ static struct { .bits = HV_DEPRECATING_AEOI_RECOMMENDED} } }, + [HYPERV_FEAT_SYNDBG] = { + .desc = "Enable synthetic kernel debugger channel (hv-syndbg)", + .flags = { + {.func = HV_CPUID_FEATURES, .reg = R_EDX, + .bits = HV_FEATURE_DEBUG_MSRS_AVAILABLE} + }, + .dependencies = BIT(HYPERV_FEAT_SYNIC) | BIT(HYPERV_FEAT_RELAXED) + }, }; static struct kvm_cpuid2 *try_get_hv_cpuid(CPUState *cs, int max, @@ -1004,8 +1013,8 @@ static struct kvm_cpuid2 *try_get_hv_cpuid(CPUState *cs, int max, static struct kvm_cpuid2 *get_supported_hv_cpuid(CPUState *cs) { struct kvm_cpuid2 *cpuid; - /* 0x40000000..0x40000005, 0x4000000A, 0x40000080..0x40000080 leaves */ - int max = 10; + /* 0x40000000..0x40000005, 0x4000000A, 0x40000080..0x40000082 leaves */ + int max = 11; int i; bool do_sys_ioctl; @@ -1118,6 +1127,12 @@ static struct kvm_cpuid2 *get_supported_hv_cpuid_legacy(CPUState *cs) entry_feat->eax |= HV_SYNTIMERS_AVAILABLE; } + if (has_msr_hv_syndbg_options) { + entry_feat->edx |= HV_GUEST_DEBUGGING_AVAILABLE; + entry_feat->edx |= HV_FEATURE_DEBUG_MSRS_AVAILABLE; + entry_feat->ebx |= HV_PARTITION_DEBUGGING_ALLOWED; + } + if (kvm_check_extension(cs->kvm_state, KVM_CAP_HYPERV_TLBFLUSH) > 0) { entry_recomm->eax |= HV_REMOTE_TLB_FLUSH_RECOMMENDED; @@ -1369,12 +1384,22 @@ static int hyperv_fill_cpuids(CPUState *cs, { X86CPU *cpu = X86_CPU(cs); struct kvm_cpuid_entry2 *c; - uint32_t cpuid_i = 0; + uint32_t signature[3]; + uint32_t cpuid_i = 0, max_cpuid_leaf = 0; + + max_cpuid_leaf = HV_CPUID_IMPLEMENT_LIMITS; + if (hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS)) { + max_cpuid_leaf = MAX(max_cpuid_leaf, HV_CPUID_NESTED_FEATURES); + } + + if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) { + max_cpuid_leaf = + MAX(max_cpuid_leaf, HV_CPUID_SYNDBG_PLATFORM_CAPABILITIES); + } c = &cpuid_ent[cpuid_i++]; c->function = HV_CPUID_VENDOR_AND_MAX_FUNCTIONS; - c->eax = hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) ? - HV_CPUID_NESTED_FEATURES : HV_CPUID_IMPLEMENT_LIMITS; + c->eax = max_cpuid_leaf; c->ebx = cpu->hyperv_vendor_id[0]; c->ecx = cpu->hyperv_vendor_id[1]; c->edx = cpu->hyperv_vendor_id[2]; @@ -1453,6 +1478,33 @@ static int hyperv_fill_cpuids(CPUState *cs, c->eax = cpu->hyperv_nested[0]; } + if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) { + c = &cpuid_ent[cpuid_i++]; + c->function = HV_CPUID_SYNDBG_VENDOR_AND_MAX_FUNCTIONS; + c->eax = hyperv_feat_enabled(cpu, HYPERV_FEAT_EVMCS) ? + HV_CPUID_NESTED_FEATURES : HV_CPUID_IMPLEMENT_LIMITS; + memcpy(signature, "Microsoft VS", 12); + c->eax = 0; + c->ebx = signature[0]; + c->ecx = signature[1]; + c->edx = signature[2]; + + c = &cpuid_ent[cpuid_i++]; + c->function = HV_CPUID_SYNDBG_INTERFACE; + memcpy(signature, "VS#1\0\0\0\0\0\0\0\0", 12); + c->eax = signature[0]; + c->ebx = 0; + c->ecx = 0; + c->edx = 0; + + c = &cpuid_ent[cpuid_i++]; + c->function = HV_CPUID_SYNDBG_PLATFORM_CAPABILITIES; + c->eax = HV_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING; + c->ebx = 0; + c->ecx = 0; + c->edx = 0; + } + return cpuid_i; } @@ -2261,6 +2313,9 @@ static int kvm_get_supported_msrs(KVMState *s) case HV_X64_MSR_REENLIGHTENMENT_CONTROL: has_msr_hv_reenlightenment = true; break; + case HV_X64_MSR_SYNDBG_OPTIONS: + has_msr_hv_syndbg_options = true; + break; case MSR_IA32_SPEC_CTRL: has_msr_spec_ctrl = true; break; @@ -3178,6 +3233,11 @@ static int kvm_put_msrs(X86CPU *cpu, int level) kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_STATUS, env->msr_hv_tsc_emulation_status); } + if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG) && + has_msr_hv_syndbg_options) { + kvm_msr_entry_add(cpu, HV_X64_MSR_SYNDBG_OPTIONS, + hyperv_syndbg_query_options()); + } } if (hyperv_feat_enabled(cpu, HYPERV_FEAT_VAPIC)) { kvm_msr_entry_add(cpu, HV_X64_MSR_APIC_ASSIST_PAGE, @@ -3619,6 +3679,9 @@ static int kvm_get_msrs(X86CPU *cpu) kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_CONTROL, 0); kvm_msr_entry_add(cpu, HV_X64_MSR_TSC_EMULATION_STATUS, 0); } + if (has_msr_hv_syndbg_options) { + kvm_msr_entry_add(cpu, HV_X64_MSR_SYNDBG_OPTIONS, 0); + } if (has_msr_hv_crash) { int j; @@ -3910,6 +3973,9 @@ static int kvm_get_msrs(X86CPU *cpu) case HV_X64_MSR_TSC_EMULATION_STATUS: env->msr_hv_tsc_emulation_status = msrs[i].data; break; + case HV_X64_MSR_SYNDBG_OPTIONS: + env->msr_hv_syndbg_options = msrs[i].data; + break; case MSR_MTRRdefType: env->mtrr_deftype = msrs[i].data; break; |