103 lines
3.2 KiB
C
103 lines
3.2 KiB
C
/*****************************************************************************
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* x86/xen/xen-os.h
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*
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* Random collection of macros and definition
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*
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* Copyright (c) 2003, 2004 Keir Fraser (on behalf of the Xen team)
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef _MACHINE_X86_XEN_XEN_OS_H_
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#define _MACHINE_X86_XEN_XEN_OS_H_
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#ifndef _XEN_XEN_OS_H_
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#error "do not #include machine/xen/xen-os.h, #include xen/xen-os.h instead"
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#endif
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/* Shared memory needs write-back as its cache attribute for coherency. */
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#define VM_MEMATTR_XEN VM_MEMATTR_WRITE_BACK
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/* Everything below this point is not included by assembler (.S) files. */
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#ifndef __ASSEMBLY__
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#include <sys/pcpu.h>
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/* If non-zero, the hypervisor has been configured to use a direct vector */
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extern int xen_vector_callback_enabled;
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/* Signal whether the event channel vector requires EOI at the lapic */
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extern bool xen_evtchn_needs_ack;
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/* tunable for disabling PV disks */
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extern int xen_disable_pv_disks;
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/* tunable for disabling PV nics */
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extern int xen_disable_pv_nics;
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/* compatibility for accessing xen_ulong_t with atomics */
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#define atomic_clear_xen_ulong atomic_clear_long
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#define atomic_set_xen_ulong atomic_set_long
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#define atomic_readandclear_xen_ulong atomic_readandclear_long
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#define atomic_testandset_xen_ulong atomic_testandset_long
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#define atomic_load_acq_xen_ulong atomic_load_acq_long
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#define atomic_store_rel_xen_ulong atomic_store_rel_long
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#define atomic_set_xen_ulong atomic_set_long
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#define atomic_clear_xen_ulong atomic_clear_long
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static inline u_int
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XEN_CPUID_TO_VCPUID(u_int cpuid)
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{
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return (pcpu_find(cpuid)->pc_vcpu_id);
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}
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#define XEN_VCPUID() PCPU_GET(vcpu_id)
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static inline bool
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xen_has_percpu_evtchn(void)
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{
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return (!xen_hvm_domain() || xen_vector_callback_enabled);
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}
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static inline bool
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xen_pv_disks_disabled(void)
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{
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return (xen_hvm_domain() && xen_disable_pv_disks != 0);
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}
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static inline bool
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xen_pv_nics_disabled(void)
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{
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return (xen_hvm_domain() && xen_disable_pv_nics != 0);
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}
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bool xen_has_iommu_maps(void);
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/* (Very) early initialization. */
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void xen_early_init(void);
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#endif /* !__ASSEMBLY__ */
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#endif /* _MACHINE_X86_XEN_XEN_OS_H_ */
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