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 /* 27 * All devices possibly using SynIC have to be reset before calling this to let 28 * them remove their SINT routes first. 29 */ 30 void hyperv_x86_synic_reset(X86CPU *cpu) 31 { 32 hyperv_synic_reset(CPU(cpu)); 33 } 34 35 void hyperv_x86_synic_update(X86CPU *cpu) 36 { 37 CPUX86State *env = &cpu->env; 38 bool enable = env->msr_hv_synic_control & HV_SYNIC_ENABLE; 39 hwaddr msg_page_addr = (env->msr_hv_synic_msg_page & HV_SIMP_ENABLE) ? 40 (env->msr_hv_synic_msg_page & TARGET_PAGE_MASK) : 0; 41 hwaddr event_page_addr = (env->msr_hv_synic_evt_page & HV_SIEFP_ENABLE) ? 42 (env->msr_hv_synic_evt_page & TARGET_PAGE_MASK) : 0; 43 hyperv_synic_update(CPU(cpu), enable, msg_page_addr, event_page_addr); 44 } 45 46 static void async_synic_update(CPUState *cs, run_on_cpu_data data) 47 { 48 qemu_mutex_lock_iothread(); 49 hyperv_x86_synic_update(X86_CPU(cs)); 50 qemu_mutex_unlock_iothread(); 51 } 52 53 int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit) 54 { 55 CPUX86State *env = &cpu->env; 56 57 switch (exit->type) { 58 case KVM_EXIT_HYPERV_SYNIC: 59 if (!hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) { 60 return -1; 61 } 62 63 switch (exit->u.synic.msr) { 64 case HV_X64_MSR_SCONTROL: 65 env->msr_hv_synic_control = exit->u.synic.control; 66 break; 67 case HV_X64_MSR_SIMP: 68 env->msr_hv_synic_msg_page = exit->u.synic.msg_page; 69 break; 70 case HV_X64_MSR_SIEFP: 71 env->msr_hv_synic_evt_page = exit->u.synic.evt_page; 72 break; 73 default: 74 return -1; 75 } 76 77 /* 78 * this will run in this cpu thread before it returns to KVM, but in a 79 * safe environment (i.e. when all cpus are quiescent) -- this is 80 * necessary because memory hierarchy is being changed 81 */ 82 async_safe_run_on_cpu(CPU(cpu), async_synic_update, RUN_ON_CPU_NULL); 83 84 return 0; 85 case KVM_EXIT_HYPERV_HCALL: { 86 uint16_t code = exit->u.hcall.input & 0xffff; 87 bool fast = exit->u.hcall.input & HV_HYPERCALL_FAST; 88 uint64_t in_param = exit->u.hcall.params[0]; 89 uint64_t out_param = exit->u.hcall.params[1]; 90 91 switch (code) { 92 case HV_POST_MESSAGE: 93 exit->u.hcall.result = hyperv_hcall_post_message(in_param, fast); 94 break; 95 case HV_SIGNAL_EVENT: 96 exit->u.hcall.result = hyperv_hcall_signal_event(in_param, fast); 97 break; 98 case HV_POST_DEBUG_DATA: 99 exit->u.hcall.result = 100 hyperv_hcall_post_dbg_data(in_param, out_param, fast); 101 break; 102 case HV_RETRIEVE_DEBUG_DATA: 103 exit->u.hcall.result = 104 hyperv_hcall_retreive_dbg_data(in_param, out_param, fast); 105 break; 106 case HV_RESET_DEBUG_SESSION: 107 exit->u.hcall.result = 108 hyperv_hcall_reset_dbg_session(out_param); 109 break; 110 default: 111 exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE; 112 } 113 return 0; 114 } 115 116 case KVM_EXIT_HYPERV_SYNDBG: 117 if (!hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNDBG)) { 118 return -1; 119 } 120 121 switch (exit->u.syndbg.msr) { 122 case HV_X64_MSR_SYNDBG_CONTROL: { 123 uint64_t control = exit->u.syndbg.control; 124 env->msr_hv_syndbg_control = control; 125 env->msr_hv_syndbg_send_page = exit->u.syndbg.send_page; 126 env->msr_hv_syndbg_recv_page = exit->u.syndbg.recv_page; 127 exit->u.syndbg.status = HV_STATUS_SUCCESS; 128 if (control & HV_SYNDBG_CONTROL_SEND) { 129 exit->u.syndbg.status = 130 hyperv_syndbg_send(env->msr_hv_syndbg_send_page, 131 HV_SYNDBG_CONTROL_SEND_SIZE(control)); 132 } else if (control & HV_SYNDBG_CONTROL_RECV) { 133 exit->u.syndbg.status = 134 hyperv_syndbg_recv(env->msr_hv_syndbg_recv_page, 135 TARGET_PAGE_SIZE); 136 } 137 break; 138 } 139 case HV_X64_MSR_SYNDBG_PENDING_BUFFER: 140 env->msr_hv_syndbg_pending_page = exit->u.syndbg.pending_page; 141 hyperv_syndbg_set_pending_page(env->msr_hv_syndbg_pending_page); 142 break; 143 default: 144 return -1; 145 } 146 147 return 0; 148 default: 149 return -1; 150 } 151 } 152