1 /* 2 * QEMU KVM Hyper-V support 3 * 4 * Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com> 5 * 6 * Authors: 7 * Andrey Smetanin <asmetanin@virtuozzo.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or later. 10 * See the COPYING file in the top-level directory. 11 * 12 */ 13 14 #include "qemu/osdep.h" 15 #include "qemu/main-loop.h" 16 #include "hyperv.h" 17 #include "hw/hyperv/hyperv.h" 18 #include "hyperv-proto.h" 19 20 int hyperv_x86_synic_add(X86CPU *cpu) 21 { 22 hyperv_synic_add(CPU(cpu)); 23 return 0; 24 } 25 26 void hyperv_x86_synic_reset(X86CPU *cpu) 27 { 28 hyperv_synic_reset(CPU(cpu)); 29 } 30 31 void hyperv_x86_synic_update(X86CPU *cpu) 32 { 33 CPUX86State *env = &cpu->env; 34 bool enable = env->msr_hv_synic_control & HV_SYNIC_ENABLE; 35 hwaddr msg_page_addr = (env->msr_hv_synic_msg_page & HV_SIMP_ENABLE) ? 36 (env->msr_hv_synic_msg_page & TARGET_PAGE_MASK) : 0; 37 hwaddr event_page_addr = (env->msr_hv_synic_evt_page & HV_SIEFP_ENABLE) ? 38 (env->msr_hv_synic_evt_page & TARGET_PAGE_MASK) : 0; 39 hyperv_synic_update(CPU(cpu), enable, msg_page_addr, event_page_addr); 40 } 41 42 static void async_synic_update(CPUState *cs, run_on_cpu_data data) 43 { 44 qemu_mutex_lock_iothread(); 45 hyperv_x86_synic_update(X86_CPU(cs)); 46 qemu_mutex_unlock_iothread(); 47 } 48 49 int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit) 50 { 51 CPUX86State *env = &cpu->env; 52 53 switch (exit->type) { 54 case KVM_EXIT_HYPERV_SYNIC: 55 if (!hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 56 return -1; 57 } 58 59 switch (exit->u.synic.msr) { 60 case HV_X64_MSR_SCONTROL: 61 env->msr_hv_synic_control = exit->u.synic.control; 62 break; 63 case HV_X64_MSR_SIMP: 64 env->msr_hv_synic_msg_page = exit->u.synic.msg_page; 65 break; 66 case HV_X64_MSR_SIEFP: 67 env->msr_hv_synic_evt_page = exit->u.synic.evt_page; 68 break; 69 default: 70 return -1; 71 } 72 73 /* 74 * this will run in this cpu thread before it returns to KVM, but in a 75 * safe environment (i.e. when all cpus are quiescent) -- this is 76 * necessary because memory hierarchy is being changed 77 */ 78 async_safe_run_on_cpu(CPU(cpu), async_synic_update, RUN_ON_CPU_NULL); 79 80 return 0; 81 case KVM_EXIT_HYPERV_HCALL: { 82 uint16_t code = exit->u.hcall.input & 0xffff; 83 bool fast = exit->u.hcall.input & HV_HYPERCALL_FAST; 84 uint64_t in_param = exit->u.hcall.params[0]; 85 uint64_t out_param = exit->u.hcall.params[1]; 86 87 switch (code) { 88 case HV_POST_MESSAGE: 89 exit->u.hcall.result = hyperv_hcall_post_message(in_param, fast); 90 break; 91 case HV_SIGNAL_EVENT: 92 exit->u.hcall.result = hyperv_hcall_signal_event(in_param, fast); 93 break; 94 case HV_POST_DEBUG_DATA: 95 exit->u.hcall.result = 96 hyperv_hcall_post_dbg_data(in_param, out_param, fast); 97 break; 98 case HV_RETRIEVE_DEBUG_DATA: 99 exit->u.hcall.result = 100 hyperv_hcall_retreive_dbg_data(in_param, out_param, fast); 101 break; 102 case HV_RESET_DEBUG_SESSION: 103 exit->u.hcall.result = 104 hyperv_hcall_reset_dbg_session(out_param); 105 break; 106 default: 107 exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE; 108 } 109 return 0; 110 } 111 112 case KVM_EXIT_HYPERV_SYNDBG: 113 if (!hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) { 114 return -1; 115 } 116 117 switch (exit->u.syndbg.msr) { 118 case HV_X64_MSR_SYNDBG_CONTROL: { 119 uint64_t control = exit->u.syndbg.control; 120 env->msr_hv_syndbg_control = control; 121 env->msr_hv_syndbg_send_page = exit->u.syndbg.send_page; 122 env->msr_hv_syndbg_recv_page = exit->u.syndbg.recv_page; 123 exit->u.syndbg.status = HV_STATUS_SUCCESS; 124 if (control & HV_SYNDBG_CONTROL_SEND) { 125 exit->u.syndbg.status = 126 hyperv_syndbg_send(env->msr_hv_syndbg_send_page, 127 HV_SYNDBG_CONTROL_SEND_SIZE(control)); 128 } else if (control & HV_SYNDBG_CONTROL_RECV) { 129 exit->u.syndbg.status = 130 hyperv_syndbg_recv(env->msr_hv_syndbg_recv_page, 131 TARGET_PAGE_SIZE); 132 } 133 break; 134 } 135 case HV_X64_MSR_SYNDBG_PENDING_BUFFER: 136 env->msr_hv_syndbg_pending_page = exit->u.syndbg.pending_page; 137 hyperv_syndbg_set_pending_page(env->msr_hv_syndbg_pending_page); 138 break; 139 default: 140 return -1; 141 } 142 143 return 0; 144 default: 145 return -1; 146 } 147 } 148