1 /* $NetBSD: nvmm_internal.h,v 1.12.2.5 2020/08/18 09:29:52 martin Exp $ */ 2 3 /* 4 * Copyright (c) 2018-2020 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Maxime Villard. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _NVMM_INTERNAL_H_ 33 #define _NVMM_INTERNAL_H_ 34 35 #define NVMM_MAX_MACHINES 128 36 #define NVMM_MAX_VCPUS 256 37 #define NVMM_MAX_HMAPPINGS 32 38 #define NVMM_MAX_RAM (128ULL * (1 << 30)) 39 40 struct nvmm_owner { 41 pid_t pid; 42 }; 43 44 struct nvmm_cpu { 45 /* Shared. */ 46 bool present; 47 nvmm_cpuid_t cpuid; 48 kmutex_t lock; 49 50 /* Comm page. */ 51 struct nvmm_comm_page *comm; 52 53 /* Last host CPU on which the VCPU ran. */ 54 int hcpu_last; 55 56 /* Implementation-specific. */ 57 void *cpudata; 58 }; 59 60 struct nvmm_hmapping { 61 bool present; 62 uintptr_t hva; 63 size_t size; 64 struct uvm_object *uobj; 65 }; 66 67 struct nvmm_machine { 68 bool present; 69 nvmm_machid_t machid; 70 time_t time; 71 struct nvmm_owner *owner; 72 krwlock_t lock; 73 74 /* Comm */ 75 struct uvm_object *commuobj; 76 77 /* Kernel */ 78 struct vmspace *vm; 79 gpaddr_t gpa_begin; 80 gpaddr_t gpa_end; 81 82 /* Host Mappings */ 83 struct nvmm_hmapping hmap[NVMM_MAX_HMAPPINGS]; 84 85 /* CPU */ 86 volatile unsigned int ncpus; 87 struct nvmm_cpu cpus[NVMM_MAX_VCPUS]; 88 89 /* Implementation-specific */ 90 void *machdata; 91 }; 92 93 struct nvmm_impl { 94 const char *name; 95 bool (*ident)(void); 96 void (*init)(void); 97 void (*fini)(void); 98 void (*capability)(struct nvmm_capability *); 99 100 size_t mach_conf_max; 101 const size_t *mach_conf_sizes; 102 103 size_t vcpu_conf_max; 104 const size_t *vcpu_conf_sizes; 105 106 size_t state_size; 107 108 void (*machine_create)(struct nvmm_machine *); 109 void (*machine_destroy)(struct nvmm_machine *); 110 int (*machine_configure)(struct nvmm_machine *, uint64_t, void *); 111 112 int (*vcpu_create)(struct nvmm_machine *, struct nvmm_cpu *); 113 void (*vcpu_destroy)(struct nvmm_machine *, struct nvmm_cpu *); 114 int (*vcpu_configure)(struct nvmm_cpu *, uint64_t, void *); 115 void (*vcpu_setstate)(struct nvmm_cpu *); 116 void (*vcpu_getstate)(struct nvmm_cpu *); 117 int (*vcpu_inject)(struct nvmm_cpu *); 118 int (*vcpu_run)(struct nvmm_machine *, struct nvmm_cpu *, 119 struct nvmm_vcpu_exit *); 120 }; 121 122 #if defined(__x86_64__) 123 extern const struct nvmm_impl nvmm_x86_svm; 124 extern const struct nvmm_impl nvmm_x86_vmx; 125 #endif 126 127 static inline bool 128 nvmm_return_needed(void) 129 { 130 if (preempt_needed()) { 131 return true; 132 } 133 if (curlwp->l_flag & LW_USERRET) { 134 return true; 135 } 136 return false; 137 } 138 139 #endif /* _NVMM_INTERNAL_H_ */ 140