Remove support for Xen PV domU kernels. Support for HVM domU kernels

remains.  Xen is planning to phase out support for PV upstream since it
is harder to maintain and has more overhead.  Modern x86 CPUs include
virtualization extensions that support HVM guests instead of PV guests.
In addition, the PV code was i386 only and not as well maintained recently
as the HVM code.
- Remove the i386-only NATIVE option that was used to disable certain
  components for PV kernels.  These components are now standard as they
  are on amd64.
- Remove !XENHVM bits from PV drivers.
- Remove various shims required for XEN (e.g. PT_UPDATES_FLUSH, LOAD_CR3,
  etc.)
- Remove duplicate copy of <xen/features.h>.
- Remove unused, i386-only xenstored.h.

Differential Revision:	https://reviews.freebsd.org/D2362
Reviewed by:	royger
Tested by:	royger (i386/amd64 HVM domU and amd64 PVH dom0)
Relnotes:	yes

7 files changed, 1 insertions, 538 deletions

diff --git a/sys/i386/include/xen/features.h b/sys/i386/include/xen/features.h
deleted file mode 100644
index fb4f680..0000000
--- a/sys/i386/include/xen/features.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/******************************************************************************
- * features.h
- *
- * Query the features reported by Xen.
- *
- * Copyright (c) 2006, Ian Campbell
- *
- * $FreeBSD$
- */
-
-#ifndef __ASM_XEN_FEATURES_H__
-#define __ASM_XEN_FEATURES_H__
-
-#include <xen/interface/version.h>
-
-extern void setup_xen_features(void);
-
-extern uint8_t xen_features[XENFEAT_NR_SUBMAPS * 32];
-
-#define xen_feature(flag)	(xen_features[flag])
-
-#endif /* __ASM_XEN_FEATURES_H__ */
diff --git a/sys/i386/include/xen/hypercall.h b/sys/i386/include/xen/hypercall.h
index c7e2a00..1c4d529 100644
--- a/sys/i386/include/xen/hypercall.h
+++ b/sys/i386/include/xen/hypercall.h
@@ -246,14 +246,8 @@ HYPERVISOR_memory_op(
 	return _hypercall2(int, memory_op, cmd, arg);
 }
 
-#if defined(XEN)
-int HYPERVISOR_multicall(multicall_entry_t *, int);
-static inline int
-_HYPERVISOR_multicall(
-#else /* XENHVM */
 static inline int
 HYPERVISOR_multicall(
-#endif
 	void *call_list, int nr_calls)
 {
 	return _hypercall2(int, multicall, call_list, nr_calls);
diff --git a/sys/i386/include/xen/xen-os.h b/sys/i386/include/xen/xen-os.h
index 3d1ef04..9b9b63f 100644
--- a/sys/i386/include/xen/xen-os.h
+++ b/sys/i386/include/xen/xen-os.h
@@ -44,105 +44,6 @@ static inline void rep_nop(void)
 }
 #define cpu_relax() rep_nop()
 
-#ifndef XENHVM
-
-#ifdef SMP
-extern int gdtset;
-
-#include <sys/time.h> /* XXX for pcpu.h */
-#include <sys/pcpu.h> /* XXX for PCPU_GET */
-static inline int 
-smp_processor_id(void)  
-{
-    if (__predict_true(gdtset))
-	return PCPU_GET(cpuid);
-    return 0;
-}
-
-#else
-#define smp_processor_id() 0
-#endif
-
-#ifndef PANIC_IF
-#define PANIC_IF(exp) if (__predict_false(exp)) {printf("panic - %s: %s:%d\n",#exp, __FILE__, __LINE__); panic("%s: %s:%d", #exp, __FILE__, __LINE__);} 
-#endif
-
-/*
- * Crude memory allocator for memory allocation early in boot.
- */
-void *bootmem_alloc(unsigned int size);
-void bootmem_free(void *ptr, unsigned int size);
-
-/*
- * STI/CLI equivalents. These basically set and clear the virtual
- * event_enable flag in the shared_info structure. Note that when
- * the enable bit is set, there may be pending events to be handled.
- * We may therefore call into do_hypervisor_callback() directly.
- */
-
-#define __cli()                                                         \
-do {                                                                    \
-        vcpu_info_t *_vcpu;                                             \
-        _vcpu = &HYPERVISOR_shared_info->vcpu_info[smp_processor_id()]; \
-        _vcpu->evtchn_upcall_mask = 1;                                  \
-        barrier();                                                      \
-} while (0)
-
-#define __sti()                                                         \
-do {                                                                    \
-        vcpu_info_t *_vcpu;                                             \
-        barrier();                                                      \
-        _vcpu = &HYPERVISOR_shared_info->vcpu_info[smp_processor_id()]; \
-        _vcpu->evtchn_upcall_mask = 0;                                  \
-        barrier(); /* unmask then check (avoid races) */                \
-        if (__predict_false(_vcpu->evtchn_upcall_pending))              \
-                force_evtchn_callback();                                \
-} while (0)
-
-#define __restore_flags(x)                                              \
-do {                                                                    \
-        vcpu_info_t *_vcpu;                                             \
-        barrier();                                                      \
-        _vcpu = &HYPERVISOR_shared_info->vcpu_info[smp_processor_id()]; \
-        if ((_vcpu->evtchn_upcall_mask = (x)) == 0) {                   \
-                barrier(); /* unmask then check (avoid races) */        \
-                if (__predict_false(_vcpu->evtchn_upcall_pending))      \
-                        force_evtchn_callback();                        \
-        } 								\
-} while (0)
-
-/*
- * Add critical_{enter, exit}?
- *
- */
-#define __save_and_cli(x)                                               \
-do {                                                                    \
-        vcpu_info_t *_vcpu;                                             \
-        _vcpu = &HYPERVISOR_shared_info->vcpu_info[smp_processor_id()]; \
-        (x) = _vcpu->evtchn_upcall_mask;                                \
-        _vcpu->evtchn_upcall_mask = 1;                                  \
-        barrier();                                                      \
-} while (0)
-
-
-#define cli() __cli()
-#define sti() __sti()
-#define save_flags(x) __save_flags(x)
-#define restore_flags(x) __restore_flags(x)
-#define save_and_cli(x) __save_and_cli(x)
-
-#define local_irq_save(x)       __save_and_cli(x)
-#define local_irq_restore(x)    __restore_flags(x)
-#define local_irq_disable()     __cli()
-#define local_irq_enable()      __sti()
-
-#define mtx_lock_irqsave(lock, x) {local_irq_save((x)); mtx_lock_spin((lock));}
-#define mtx_unlock_irqrestore(lock, x) {mtx_unlock_spin((lock)); local_irq_restore((x)); }
-#define spin_lock_irqsave mtx_lock_irqsave
-#define spin_unlock_irqrestore mtx_unlock_irqrestore
-
-#endif /* !XENHVM */
-
 /* This is a barrier for the compiler only, NOT the processor! */
 #define barrier() __asm__ __volatile__("": : :"memory")
 
diff --git a/sys/i386/include/xen/xenfunc.h b/sys/i386/include/xen/xenfunc.h
index f02ee12..f48b1f1 100644
--- a/sys/i386/include/xen/xenfunc.h
+++ b/sys/i386/include/xen/xenfunc.h
@@ -34,7 +34,6 @@
 
 #include <vm/pmap.h>
 
-#include <machine/xen/xenpmap.h>
 #include <machine/segments.h>
 
 #include <sys/pcpu.h>
diff --git a/sys/i386/include/xen/xenpmap.h b/sys/i386/include/xen/xenpmap.h
deleted file mode 100644
index 8287e72..0000000
--- a/sys/i386/include/xen/xenpmap.h
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- *
- * Copyright (c) 2004 Christian Limpach.
- * Copyright (c) 2004,2005 Kip Macy
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *      This product includes software developed by Christian Limpach.
- * 4. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * $FreeBSD$
- */
-
-#ifndef _XEN_XENPMAP_H_
-#define _XEN_XENPMAP_H_
-
-#if defined(XEN)
-void _xen_queue_pt_update(vm_paddr_t, vm_paddr_t, char *, int);
-void xen_pt_switch(vm_paddr_t);
-void xen_set_ldt(vm_paddr_t, unsigned long);
-void xen_pgdpt_pin(vm_paddr_t);
-void xen_pgd_pin(vm_paddr_t);
-void xen_pgd_unpin(vm_paddr_t);
-void xen_pt_pin(vm_paddr_t);
-void xen_pt_unpin(vm_paddr_t);
-void xen_flush_queue(void);
-void pmap_ref(pt_entry_t *pte, vm_paddr_t ma);
-void pmap_suspend(void);
-void pmap_resume(void);
-void xen_check_queue(void);
-
-#ifdef INVARIANTS
-#define xen_queue_pt_update(a, b) _xen_queue_pt_update((a), (b), __FILE__, __LINE__)
-#else
-#define xen_queue_pt_update(a, b) _xen_queue_pt_update((a), (b), NULL, 0)
-#endif	
-
-
-#include <sys/param.h>
-#include <sys/pcpu.h>
-
-#ifdef PMAP_DEBUG
-#define PMAP_REF pmap_ref
-#define PMAP_DEC_REF_PAGE pmap_dec_ref_page
-#define PMAP_MARK_PRIV pmap_mark_privileged
-#define PMAP_MARK_UNPRIV pmap_mark_unprivileged
-#else 
-#define PMAP_MARK_PRIV(a)
-#define PMAP_MARK_UNPRIV(a)
-#define PMAP_REF(a, b)
-#define PMAP_DEC_REF_PAGE(a)
-#endif
-
-#define ALWAYS_SYNC 0
-
-#ifdef PT_DEBUG
-#define PT_LOG() printk("WP PT_SET %s:%d\n", __FILE__, __LINE__) 
-#else
-#define PT_LOG()
-#endif
-
-#define INVALID_P2M_ENTRY	(~0UL)
-
-#define pmap_valid_entry(E)           ((E) & PG_V) /* is PDE or PTE valid? */
-
-#define SH_PD_SET_VA        1
-#define SH_PD_SET_VA_MA     2
-#define SH_PD_SET_VA_CLEAR  3
-
-struct pmap;
-void pd_set(struct pmap *pmap, int ptepindex, vm_paddr_t val, int type);
-#ifdef notyet
-static vm_paddr_t
-vptetomachpte(vm_paddr_t *pte)
-{
-	vm_offset_t offset, ppte;
-	vm_paddr_t pgoffset, retval, *pdir_shadow_ptr;
-	int pgindex;
-
-	ppte = (vm_offset_t)pte;
-	pgoffset = (ppte & PAGE_MASK);
-	offset = ppte - (vm_offset_t)PTmap;
-	pgindex = ppte >> PDRSHIFT;
-
-	pdir_shadow_ptr = (vm_paddr_t *)PCPU_GET(pdir_shadow);
-	retval = (pdir_shadow_ptr[pgindex] & ~PAGE_MASK) + pgoffset;
-	return (retval);
-}
-#endif
-#define	PT_GET(_ptp)						\
-	(pmap_valid_entry(*(_ptp)) ? xpmap_mtop(*(_ptp)) : (0))
-
-#ifdef WRITABLE_PAGETABLES
-
-#define PT_SET_VA(_ptp,_npte,sync) do {				\
-        PMAP_REF((_ptp), xpmap_ptom(_npte));                    \
-        PT_LOG();                                               \
-        *(_ptp) = xpmap_ptom((_npte));                          \
-} while (/*CONSTCOND*/0)
-#define PT_SET_VA_MA(_ptp,_npte,sync) do {		        \
-        PMAP_REF((_ptp), (_npte));                              \
-        PT_LOG();                                               \
-        *(_ptp) = (_npte);                                      \
-} while (/*CONSTCOND*/0)
-#define PT_CLEAR_VA(_ptp, sync) do {				\
-        PMAP_REF((pt_entry_t *)(_ptp), 0);                      \
-        PT_LOG();                                               \
-        *(_ptp) = 0;                                            \
-} while (/*CONSTCOND*/0)
-
-#define PD_SET_VA(_pmap, _ptp, _npte, sync) do {		\
-        PMAP_REF((_ptp), xpmap_ptom(_npte));                    \
-        pd_set((_pmap),(_ptp),(_npte), SH_PD_SET_VA);           \
-	if (sync || ALWAYS_SYNC) xen_flush_queue();     	\
-} while (/*CONSTCOND*/0)
-#define PD_SET_VA_MA(_pmap, _ptp, _npte, sync) do {		\
-        PMAP_REF((_ptp), (_npte));                              \
-        pd_set((_pmap),(_ptp),(_npte), SH_PD_SET_VA_MA);        \
-	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
-} while (/*CONSTCOND*/0)
-#define PD_CLEAR_VA(_pmap, _ptp, sync) do {			\
-        PMAP_REF((pt_entry_t *)(_ptp), 0);                      \
-        pd_set((_pmap),(_ptp), 0, SH_PD_SET_VA_CLEAR);  	\
-	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
-} while (/*CONSTCOND*/0)
-
-#else /* !WRITABLE_PAGETABLES */
-
-#define PT_SET_VA(_ptp,_npte,sync) do {				\
-        PMAP_REF((_ptp), xpmap_ptom(_npte));                    \
-	xen_queue_pt_update(vtomach(_ptp), 	        \
-			    xpmap_ptom(_npte)); 		\
-	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
-} while (/*CONSTCOND*/0)
-#define PT_SET_VA_MA(_ptp,_npte,sync) do {		        \
-        PMAP_REF((_ptp), (_npte));                              \
-	xen_queue_pt_update(vtomach(_ptp), _npte);        \
-	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
-} while (/*CONSTCOND*/0)
-#define PT_CLEAR_VA(_ptp, sync) do {				\
-        PMAP_REF((pt_entry_t *)(_ptp), 0);                      \
-	xen_queue_pt_update(vtomach(_ptp), 0);            \
-	if (sync || ALWAYS_SYNC)				\
-		xen_flush_queue();				\
-} while (/*CONSTCOND*/0)
-
-#define PD_SET_VA(_pmap, _ptepindex,_npte,sync) do {		\
-        PMAP_REF((_ptp), xpmap_ptom(_npte));                    \
-        pd_set((_pmap),(_ptepindex),(_npte), SH_PD_SET_VA);     \
-	if (sync || ALWAYS_SYNC) xen_flush_queue();     	\
-} while (/*CONSTCOND*/0)
-#define PD_SET_VA_MA(_pmap, _ptepindex,_npte,sync) do {		\
-        PMAP_REF((_ptp), (_npte));                              \
-        pd_set((_pmap),(_ptepindex),(_npte), SH_PD_SET_VA_MA);  \
-	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
-} while (/*CONSTCOND*/0)
-#define PD_CLEAR_VA(_pmap, _ptepindex, sync) do {		\
-        PMAP_REF((pt_entry_t *)(_ptp), 0);                      \
-        pd_set((_pmap),(_ptepindex), 0, SH_PD_SET_VA_CLEAR);    \
-	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
-} while (/*CONSTCOND*/0)
-
-#endif
-
-#define PT_SET_MA(_va, _ma) 					\
-do { 								\
-   PANIC_IF(HYPERVISOR_update_va_mapping(((unsigned long)(_va)),\
-	   (_ma),						\
-	   UVMF_INVLPG| UVMF_ALL) < 0);			\
-} while (/*CONSTCOND*/0)	  
-
-#define	PT_UPDATES_FLUSH() do {				        \
-        xen_flush_queue();                                      \
-} while (/*CONSTCOND*/0)
-
-static __inline vm_paddr_t
-xpmap_mtop(vm_paddr_t mpa)
-{
-	vm_paddr_t tmp = (mpa & PG_FRAME);
-	
-	return machtophys(tmp) | (mpa & ~PG_FRAME);
-}
-
-static __inline vm_paddr_t
-xpmap_ptom(vm_paddr_t ppa)
-{
-	vm_paddr_t tmp = (ppa & PG_FRAME);
-
-	return phystomach(tmp) | (ppa & ~PG_FRAME);
-}
-
-static __inline void
-set_phys_to_machine(unsigned long pfn, unsigned long mfn)
-{
-#ifdef notyet	
-        PANIC_IF(max_mapnr && pfn >= max_mapnr);
-#endif	
-        if (xen_feature(XENFEAT_auto_translated_physmap)) {
-#ifdef notyet		
-                PANIC_IF((pfn != mfn && mfn != INVALID_P2M_ENTRY));
-#endif		
-                return;
-        }
-        xen_phys_machine[pfn] = mfn;
-}
-
-static __inline int
-phys_to_machine_mapping_valid(unsigned long pfn)
-{
-	return xen_phys_machine[pfn] != INVALID_P2M_ENTRY;
-}
-
-#endif /* !XEN */
-
-#endif /* _XEN_XENPMAP_H_ */
diff --git a/sys/i386/include/xen/xenstored.h b/sys/i386/include/xen/xenstored.h
deleted file mode 100644
index e584fa5..0000000
--- a/sys/i386/include/xen/xenstored.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * Simple prototyle Xen Store Daemon providing simple tree-like database.
- * Copyright (C) 2005 Rusty Russell IBM Corporation
- *
- * This file may be distributed separately from the Linux kernel, or
- * incorporated into other software packages, subject to the following license:
- * 
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this source file (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy, modify,
- * merge, publish, distribute, sublicense, and/or sell copies of the Software,
- * and to permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- * 
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-#ifndef _XENSTORED_H
-#define _XENSTORED_H
-
-enum xsd_sockmsg_type
-{
-	XS_DEBUG,
-	XS_SHUTDOWN,
-	XS_DIRECTORY,
-	XS_READ,
-	XS_GET_PERMS,
-	XS_WATCH,
-	XS_WATCH_ACK,
-	XS_UNWATCH,
-	XS_TRANSACTION_START,
-	XS_TRANSACTION_END,
-	XS_OP_READ_ONLY = XS_TRANSACTION_END,
-	XS_INTRODUCE,
-	XS_RELEASE,
-	XS_GETDOMAINPATH,
-	XS_WRITE,
-	XS_MKDIR,
-	XS_RM,
-	XS_SET_PERMS,
-	XS_WATCH_EVENT,
-	XS_ERROR,
-};
-
-#define XS_WRITE_NONE "NONE"
-#define XS_WRITE_CREATE "CREATE"
-#define XS_WRITE_CREATE_EXCL "CREATE|EXCL"
-
-/* We hand errors as strings, for portability. */
-struct xsd_errors
-{
-	int errnum;
-	const char *errstring;
-};
-#define XSD_ERROR(x) { x, #x }
-static struct xsd_errors xsd_errors[] __attribute__((unused)) = {
-	XSD_ERROR(EINVAL),
-	XSD_ERROR(EACCES),
-	XSD_ERROR(EEXIST),
-	XSD_ERROR(EISDIR),
-	XSD_ERROR(ENOENT),
-	XSD_ERROR(ENOMEM),
-	XSD_ERROR(ENOSPC),
-	XSD_ERROR(EIO),
-	XSD_ERROR(ENOTEMPTY),
-	XSD_ERROR(ENOSYS),
-	XSD_ERROR(EROFS),
-	XSD_ERROR(EBUSY),
-	XSD_ERROR(ETIMEDOUT),
-	XSD_ERROR(EISCONN),
-};
-struct xsd_sockmsg
-{
-	uint32_t type;
-	uint32_t len; 		/* Length of data following this. */
-
-	/* Generally followed by nul-terminated string(s). */
-};
-
-#endif /* _XENSTORED_H */
diff --git a/sys/i386/include/xen/xenvar.h b/sys/i386/include/xen/xenvar.h
index 5694607..484c279 100644
--- a/sys/i386/include/xen/xenvar.h
+++ b/sys/i386/include/xen/xenvar.h
@@ -29,91 +29,8 @@
 #ifndef XENVAR_H_
 #define XENVAR_H_
 
-#include <machine/xen/features.h>
-
-#if defined(XEN)
-
-#define XBOOTUP 0x1
-#define XPMAP   0x2
-extern int xendebug_flags;
-#ifndef NOXENDEBUG
-/* Print directly to the Xen console during debugging. */
-#define XENPRINTF xc_printf
-#else
-#define XENPRINTF printf
-#endif
-
-extern	xen_pfn_t *xen_phys_machine;
-extern	xen_pfn_t *xen_pfn_to_mfn_frame_list[16];
-extern	xen_pfn_t *xen_pfn_to_mfn_frame_list_list;
-
-#if 0
-#define TRACE_ENTER XENPRINTF("(file=%s, line=%d) entered %s\n", __FILE__, __LINE__, __FUNCTION__)
-#define TRACE_EXIT XENPRINTF("(file=%s, line=%d) exiting %s\n", __FILE__, __LINE__, __FUNCTION__)
-#define TRACE_DEBUG(argflags, _f, _a...) \
-if (xendebug_flags & argflags) XENPRINTF("(file=%s, line=%d) " _f "\n", __FILE__, __LINE__, ## _a);
-#else
-#define TRACE_ENTER
-#define TRACE_EXIT
-#define TRACE_DEBUG(argflags, _f, _a...)
-#endif
-
-extern xen_pfn_t *xen_machine_phys;
-/* Xen starts physical pages after the 4MB ISA hole -
- * FreeBSD doesn't
- */
-
-
-#undef ADD_ISA_HOLE /* XXX */
-
-#ifdef ADD_ISA_HOLE
-#define ISA_INDEX_OFFSET 1024 
-#define ISA_PDR_OFFSET 1
-#else
-#define ISA_INDEX_OFFSET 0
-#define ISA_PDR_OFFSET 0
-#endif
-
-
-#define PFNTOMFN(i) (xen_phys_machine[(i)])
-#define MFNTOPFN(i) ((vm_paddr_t)xen_machine_phys[(i)])
-
-#define VTOP(x) ((((uintptr_t)(x))) - KERNBASE)
-#define PTOV(x) (((uintptr_t)(x)) + KERNBASE)
-
-#define VTOPFN(x) (VTOP(x) >> PAGE_SHIFT)
-#define PFNTOV(x) PTOV((vm_paddr_t)(x)  << PAGE_SHIFT)
-
-#define VTOMFN(va) (vtomach(va) >> PAGE_SHIFT)
-#define PFN_UP(x)    (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
-
-#define phystomach(pa) (((vm_paddr_t)(PFNTOMFN((pa) >> PAGE_SHIFT))) << PAGE_SHIFT)
-#define machtophys(ma) (((vm_paddr_t)(MFNTOPFN((ma) >> PAGE_SHIFT))) << PAGE_SHIFT)
-
-
-void xpq_init(void);
-
-#define BITS_PER_LONG 32
-#define NR_CPUS      XEN_LEGACY_MAX_VCPUS
-
-#define BITS_TO_LONGS(bits) \
-	(((bits)+BITS_PER_LONG-1)/BITS_PER_LONG)
-#define DECLARE_BITMAP(name,bits) \
-	unsigned long name[BITS_TO_LONGS(bits)]
-
-int  xen_create_contiguous_region(vm_page_t pages, int npages);
-
-void  xen_destroy_contiguous_region(void * addr, int npages);
-
-#elif defined(XENHVM)
+#include <xen/features.h>
 
 #define	vtomach(va)	pmap_kextract((vm_offset_t) (va))
-#define	PFNTOMFN(pa)	(pa)
-#define	MFNTOPFN(ma)	(ma)
-
-#define	set_phys_to_machine(pfn, mfn)		((void)0)
-#define	phys_to_machine_mapping_valid(pfn)	(TRUE)
-
-#endif /* !XEN && !XENHVM */
 
 #endif