cfa0b7b82f
HYPERVISOR_start_info is only available to PV and PVHv1 guests, HVM and PVHv2 guests get this data from HVM parameters that are fetched using a hypercall. Instead provide a set of helper functions that should be used to fetch this data. The helper functions have different implementations depending on whether FreeBSD is running as PVHv1 or HVM/PVHv2 guest type. This helps to cleanup generic Xen code by removing quite a lot of xen_pv_domain and xen_hvm_domain macro usages. Sponsored by: Citrix Systems R&D
192 lines
4.5 KiB
C
192 lines
4.5 KiB
C
/******************************************************************************
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* 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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* $FreeBSD$
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*/
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#ifndef _XEN_XEN_OS_H_
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#define _XEN_XEN_OS_H_
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#if !defined(__XEN_INTERFACE_VERSION__)
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#define __XEN_INTERFACE_VERSION__ 0x00030208
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#endif
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#define GRANT_REF_INVALID 0xffffffff
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#ifdef LOCORE
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#define __ASSEMBLY__
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#endif
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#include <xen/interface/xen.h>
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#ifndef __ASSEMBLY__
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#include <xen/interface/event_channel.h>
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struct hypervisor_info {
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vm_paddr_t (*get_xenstore_mfn)(void);
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evtchn_port_t (*get_xenstore_evtchn)(void);
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vm_paddr_t (*get_console_mfn)(void);
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evtchn_port_t (*get_console_evtchn)(void);
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uint32_t (*get_start_flags)(void);
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};
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extern struct hypervisor_info hypervisor_info;
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static inline vm_paddr_t
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xen_get_xenstore_mfn(void)
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{
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return (hypervisor_info.get_xenstore_mfn());
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}
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static inline evtchn_port_t
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xen_get_xenstore_evtchn(void)
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{
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return (hypervisor_info.get_xenstore_evtchn());
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}
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static inline vm_paddr_t
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xen_get_console_mfn(void)
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{
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return (hypervisor_info.get_console_mfn());
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}
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static inline evtchn_port_t
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xen_get_console_evtchn(void)
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{
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return (hypervisor_info.get_console_evtchn());
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}
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static inline uint32_t
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xen_get_start_flags(void)
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{
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return (hypervisor_info.get_start_flags());
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}
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#endif
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#include <machine/xen/xen-os.h>
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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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extern shared_info_t *HYPERVISOR_shared_info;
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extern int xen_disable_pv_disks;
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extern int xen_disable_pv_nics;
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extern bool xen_suspend_cancelled;
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enum xen_domain_type {
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XEN_NATIVE, /* running on bare hardware */
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XEN_PV_DOMAIN, /* running in a PV domain */
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XEN_HVM_DOMAIN, /* running in a Xen hvm domain */
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};
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extern enum xen_domain_type xen_domain_type;
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static inline int
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xen_domain(void)
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{
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return (xen_domain_type != XEN_NATIVE);
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}
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static inline int
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xen_pv_domain(void)
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{
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return (xen_domain_type == XEN_PV_DOMAIN);
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}
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static inline int
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xen_hvm_domain(void)
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{
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return (xen_domain_type == XEN_HVM_DOMAIN);
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}
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static inline bool
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xen_initial_domain(void)
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{
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return (xen_domain() && (xen_get_start_flags() & SIF_INITDOMAIN) != 0);
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}
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/*
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* Based on ofed/include/linux/bitops.h
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*
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* Those helpers are prefixed by xen_ because xen-os.h is widely included
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* and we don't want the other drivers using them.
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*
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*/
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#define NBPL (NBBY * sizeof(long))
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static inline bool
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xen_test_bit(int bit, volatile long *addr)
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{
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unsigned long mask = 1UL << (bit % NBPL);
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return !!(atomic_load_acq_long(&addr[bit / NBPL]) & mask);
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}
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static inline void
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xen_set_bit(int bit, volatile long *addr)
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{
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atomic_set_long(&addr[bit / NBPL], 1UL << (bit % NBPL));
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}
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static inline void
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xen_clear_bit(int bit, volatile long *addr)
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{
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atomic_clear_long(&addr[bit / NBPL], 1UL << (bit % NBPL));
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}
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#undef NBPL
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/*
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* Functions to allocate/free unused memory in order
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* to map memory from other domains.
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*/
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struct resource *xenmem_alloc(device_t dev, int *res_id, size_t size);
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int xenmem_free(device_t dev, int res_id, struct resource *res);
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/* Debug/emergency function, prints directly to hypervisor console */
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void xc_printf(const char *, ...) __printflike(1, 2);
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#ifndef xen_mb
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#define xen_mb() mb()
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#endif
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#ifndef xen_rmb
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#define xen_rmb() rmb()
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#endif
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#ifndef xen_wmb
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#define xen_wmb() wmb()
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#endif
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#endif /* !__ASSEMBLY__ */
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#endif /* _XEN_XEN_OS_H_ */
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