1 /* $NetBSD: hypervisor.h,v 1.60 2024/07/16 22:44:38 riastradh Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Manuel Bouyer. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 */ 27 28 /* 29 * 30 * Communication to/from hypervisor. 31 * 32 * Copyright (c) 2002-2004, K A Fraser 33 * 34 * Permission is hereby granted, free of charge, to any person obtaining a copy 35 * of this source file (the "Software"), to deal in the Software without 36 * restriction, including without limitation the rights to use, copy, modify, 37 * merge, publish, distribute, sublicense, and/or sell copies of the Software, 38 * and to permit persons to whom the Software is furnished to do so, subject to 39 * the following conditions: 40 * 41 * The above copyright notice and this permission notice shall be included in 42 * all copies or substantial portions of the Software. 43 * 44 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 45 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 46 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 47 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 48 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 49 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 50 * IN THE SOFTWARE. 51 */ 52 53 54 #ifndef _XEN_HYPERVISOR_H_ 55 #define _XEN_HYPERVISOR_H_ 56 57 #include "opt_xen.h" 58 #include "isa.h" 59 #include "pci.h" 60 61 #include <machine/vmparam.h> 62 63 struct cpu_info; 64 65 int xen_hvm_init(void); 66 int xen_hvm_init_cpu(struct cpu_info *); 67 void xen_mainbus_attach(device_t, device_t, void *); 68 69 struct hypervisor_attach_args { 70 const char *haa_busname; 71 }; 72 73 struct xencons_attach_args { 74 const char *xa_device; 75 }; 76 77 struct xen_npx_attach_args { 78 const char *xa_device; 79 }; 80 81 82 #define u8 uint8_t 83 #define u16 uint16_t 84 #define u32 uint32_t 85 #define u64 uint64_t 86 #define s8 int8_t 87 #define s16 int16_t 88 #define s32 int32_t 89 #define s64 int64_t 90 91 #include <sys/atomic.h> 92 93 #include <xen/include/public/xen.h> 94 #include <xen/include/public/sched.h> 95 #include <xen/include/public/platform.h> 96 #if __XEN_INTERFACE_VERSION__ < 0x00030204 97 #include <xen/include/public/dom0_ops.h> 98 #endif 99 #include <xen/include/public/event_channel.h> 100 #include <xen/include/public/physdev.h> 101 #include <xen/include/public/memory.h> 102 #include <xen/include/public/io/netif.h> 103 #include <xen/include/public/io/blkif.h> 104 #include <xen/include/public/arch-x86/hvm/start_info.h> 105 106 #if __XEN_INTERFACE_VERSION < 0x00030208 107 /* Undo namespace damage from xen/include/public/io/ring.h 108 * The proper fix is to get upstream to stop assuming that all OSs use 109 * mb(), rmb(), wmb(). 110 */ 111 #undef xen_mb 112 #undef xen_rmb 113 #undef xen_wmb 114 115 void xen_mb(void); 116 #define xen_rmb() membar_acquire() 117 #define xen_wmb() membar_release() 118 #endif /* __XEN_INTERFACE_VERSION */ 119 120 #include <machine/xen/hypercalls.h> 121 122 #undef u8 123 #undef u16 124 #undef u32 125 #undef u64 126 #undef s8 127 #undef s16 128 #undef s32 129 #undef s64 130 131 132 133 /* 134 * a placeholder for the start of day information passed up from the hypervisor 135 */ 136 union start_info_union 137 { 138 start_info_t start_info; 139 char padding[PAGE_SIZE]; 140 }; 141 extern union start_info_union start_info_union; 142 #define xen_start_info (start_info_union.start_info) 143 144 CTASSERT(sizeof(start_info_t) <= PAGE_SIZE); 145 146 extern struct hvm_start_info *hvm_start_info; 147 148 /* For use in guest OSes. */ 149 extern volatile shared_info_t *HYPERVISOR_shared_info; 150 151 /* console */ 152 extern volatile struct xencons_interface *xencons_interface; 153 154 155 /* Structural guest handles introduced in 0x00030201. */ 156 #if __XEN_INTERFACE_VERSION__ >= 0x00030201 157 #define xenguest_handle(hnd) (hnd).p 158 #else 159 #define xenguest_handle(hnd) hnd 160 #endif 161 162 /* hypervisor.c */ 163 struct intrframe; 164 struct cpu_info; 165 void do_hypervisor_callback(struct intrframe *regs); 166 #if defined(XENPV) && (NPCI > 0 || NISA > 0) 167 void hypervisor_prime_pirq_event(int, unsigned int); 168 void hypervisor_ack_pirq_event(unsigned int); 169 #endif /* XENPV && ( NPCI > 0 || NISA > 0 ) */ 170 171 extern int xen_version; 172 #define XEN_MAJOR(x) (((x) & 0xffff0000) >> 16) 173 #define XEN_MINOR(x) ((x) & 0x0000ffff) 174 175 /* 176 * Does the hypervisor we're running on support an api 177 * call at the requested version number ? 178 */ 179 #define XEN_VERSION_SUPPORTED(major, minor) \ 180 (XEN_MAJOR(xen_version) > (major) || \ 181 (XEN_MAJOR(xen_version) == (major) && \ 182 XEN_MINOR(xen_version) >= (minor))) 183 184 /* hypervisor_machdep.c */ 185 void hypervisor_send_event(struct cpu_info *, unsigned int); 186 void hypervisor_unmask_event(unsigned int); 187 void hypervisor_mask_event(unsigned int); 188 void hypervisor_clear_event(unsigned int); 189 void hypervisor_enable_sir(unsigned int); 190 void hypervisor_set_ipending(uint64_t, int, int); 191 void hypervisor_machdep_attach(void); 192 void hypervisor_machdep_resume(void); 193 194 /* 195 * Force a proper event-channel callback from Xen after clearing the 196 * callback mask. We do this in a very simple manner, by making a call 197 * down into Xen. The pending flag will be checked by Xen on return. 198 */ 199 static __inline void hypervisor_force_callback(void) 200 { 201 (void)HYPERVISOR_xen_version(0, (void*)0); 202 } __attribute__((no_instrument_function)) /* used by mcount */ 203 204 static __inline void 205 hypervisor_notify_via_evtchn(unsigned int port) 206 { 207 evtchn_op_t op; 208 209 op.cmd = EVTCHNOP_send; 210 op.u.send.port = port; 211 (void)HYPERVISOR_event_channel_op(&op); 212 } 213 214 void xen_init_ksyms(void); 215 void xen_map_vcpu(struct cpu_info *); 216 217 void xen_early_console(void); 218 219 #endif /* _XEN_HYPERVISOR_H_ */ 220
Indexes created Sat Sep 20 22:09:52 GMT 2025