1 /***************************************************************************** 2 * x86/xen/xen-os.h 3 * 4 * Random collection of macros and definition 5 * 6 * Copyright (c) 2003, 2004 Keir Fraser (on behalf of the Xen team) 7 * All rights reserved. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a copy 10 * of this software and associated documentation files (the "Software"), to 11 * deal in the Software without restriction, including without limitation the 12 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 13 * sell copies of the Software, and to permit persons to whom the Software is 14 * furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included in 17 * all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 25 * DEALINGS IN THE SOFTWARE. 26 */ 27 28 #ifndef _MACHINE_X86_XEN_XEN_OS_H_ 29 #define _MACHINE_X86_XEN_XEN_OS_H_ 30 31 #ifndef _XEN_XEN_OS_H_ 32 #error "do not #include machine/xen/xen-os.h, #include xen/xen-os.h instead" 33 #endif 34 35 /* Shared memory needs write-back as its cache attribute for coherency. */ 36 #define VM_MEMATTR_XEN VM_MEMATTR_WRITE_BACK 37 38 /* Everything below this point is not included by assembler (.S) files. */ 39 #ifndef __ASSEMBLY__ 40 41 #include <sys/pcpu.h> 42 43 /* If non-zero, the hypervisor has been configured to use a direct vector */ 44 extern int xen_vector_callback_enabled; 45 46 /* Signal whether the event channel vector requires EOI at the lapic */ 47 extern bool xen_evtchn_needs_ack; 48 49 /* tunable for disabling PV disks */ 50 extern int xen_disable_pv_disks; 51 52 /* tunable for disabling PV nics */ 53 extern int xen_disable_pv_nics; 54 55 /* compatibility for accessing xen_ulong_t with atomics */ 56 #define atomic_clear_xen_ulong atomic_clear_long 57 #define atomic_set_xen_ulong atomic_set_long 58 #define atomic_readandclear_xen_ulong atomic_readandclear_long 59 #define atomic_testandset_xen_ulong atomic_testandset_long 60 #define atomic_load_acq_xen_ulong atomic_load_acq_long 61 #define atomic_store_rel_xen_ulong atomic_store_rel_long 62 #define atomic_set_xen_ulong atomic_set_long 63 #define atomic_clear_xen_ulong atomic_clear_long 64 65 static inline u_int 66 XEN_CPUID_TO_VCPUID(u_int cpuid) 67 { 68 69 return (pcpu_find(cpuid)->pc_vcpu_id); 70 } 71 72 #define XEN_VCPUID() PCPU_GET(vcpu_id) 73 74 static inline bool 75 xen_has_percpu_evtchn(void) 76 { 77 78 return (!xen_hvm_domain() || xen_vector_callback_enabled); 79 } 80 81 static inline bool 82 xen_pv_disks_disabled(void) 83 { 84 85 return (xen_hvm_domain() && xen_disable_pv_disks != 0); 86 } 87 88 static inline bool 89 xen_pv_nics_disabled(void) 90 { 91 92 return (xen_hvm_domain() && xen_disable_pv_nics != 0); 93 } 94 95 bool xen_has_iommu_maps(void); 96 97 /* (Very) early initialization. */ 98 void xen_early_init(void); 99 100 #endif /* !__ASSEMBLY__ */ 101 102 #endif /* _MACHINE_X86_XEN_XEN_OS_H_ */ 103