xenpmap.h revision 185386 
1/*
2 *
3 * Copyright (c) 2004 Christian Limpach.
4 * Copyright (c) 2004,2005 Kip Macy
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Christian Limpach.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33
34#ifndef _XEN_XENPMAP_H_
35#define _XEN_XENPMAP_H_
36void _xen_queue_pt_update(vm_paddr_t, vm_paddr_t, char *, int);
37void xen_pt_switch(vm_paddr_t);
38void xen_set_ldt(vm_paddr_t, unsigned long);
39void xen_pgdpt_pin(vm_paddr_t);
40void xen_pgd_pin(vm_paddr_t);
41void xen_pgd_unpin(vm_paddr_t);
42void xen_pt_pin(vm_paddr_t);
43void xen_pt_unpin(vm_paddr_t);
44void xen_flush_queue(void);
45void xen_check_queue(void);
46#if 0
47void pmap_ref(pt_entry_t *pte, vm_paddr_t ma);
48#endif
49
50#ifdef INVARIANTS
51#define xen_queue_pt_update(a, b) _xen_queue_pt_update((a), (b), __FILE__, __LINE__)
52#else
53#define xen_queue_pt_update(a, b) _xen_queue_pt_update((a), (b), NULL, 0)
54#endif
55
56
57#include <sys/param.h>
58#include <sys/pcpu.h>
59
60#ifdef PMAP_DEBUG
61#define PMAP_REF pmap_ref
62#define PMAP_DEC_REF_PAGE pmap_dec_ref_page
63#define PMAP_MARK_PRIV pmap_mark_privileged
64#define PMAP_MARK_UNPRIV pmap_mark_unprivileged
65#else
66#define PMAP_MARK_PRIV(a)
67#define PMAP_MARK_UNPRIV(a)
68#define PMAP_REF(a, b)
69#define PMAP_DEC_REF_PAGE(a)
70#endif
71
72#define ALWAYS_SYNC 0
73
74#ifdef PT_DEBUG
75#define PT_LOG() printk("WP PT_SET %s:%d\n", __FILE__, __LINE__)
76#else
77#define PT_LOG()
78#endif
79
80#define INVALID_P2M_ENTRY	(~0UL)
81
82#define pmap_valid_entry(E)           ((E) & PG_V) /* is PDE or PTE valid? */
83
84#define SH_PD_SET_VA        1
85#define SH_PD_SET_VA_MA     2
86#define SH_PD_SET_VA_CLEAR  3
87
88struct pmap;
89void pd_set(struct pmap *pmap, int ptepindex, vm_paddr_t val, int type);
90#ifdef notyet
91static vm_paddr_t
92vptetomachpte(vm_paddr_t *pte)
93{
94	vm_offset_t offset, ppte;
95	vm_paddr_t pgoffset, retval, *pdir_shadow_ptr;
96	int pgindex;
97
98	ppte = (vm_offset_t)pte;
99	pgoffset = (ppte & PAGE_MASK);
100	offset = ppte - (vm_offset_t)PTmap;
101	pgindex = ppte >> PDRSHIFT;
102
103	pdir_shadow_ptr = (vm_paddr_t *)PCPU_GET(pdir_shadow);
104	retval = (pdir_shadow_ptr[pgindex] & ~PAGE_MASK) + pgoffset;
105	return (retval);
106}
107#endif
108#define	PT_GET(_ptp)						\
109	(pmap_valid_entry(*(_ptp)) ? xpmap_mtop(*(_ptp)) : (0))
110
111#ifdef WRITABLE_PAGETABLES
112
113#define PT_SET_VA(_ptp,_npte,sync) do {				\
114        PMAP_REF((_ptp), xpmap_ptom(_npte));                    \
115        PT_LOG();                                               \
116        *(_ptp) = xpmap_ptom((_npte));                          \
117} while (/*CONSTCOND*/0)
118#define PT_SET_VA_MA(_ptp,_npte,sync) do {		        \
119        PMAP_REF((_ptp), (_npte));                              \
120        PT_LOG();                                               \
121        *(_ptp) = (_npte);                                      \
122} while (/*CONSTCOND*/0)
123#define PT_CLEAR_VA(_ptp, sync) do {				\
124        PMAP_REF((pt_entry_t *)(_ptp), 0);                      \
125        PT_LOG();                                               \
126        *(_ptp) = 0;                                            \
127} while (/*CONSTCOND*/0)
128
129#define PD_SET_VA(_pmap, _ptp, _npte, sync) do {		\
130        PMAP_REF((_ptp), xpmap_ptom(_npte));                    \
131        pd_set((_pmap),(_ptp),(_npte), SH_PD_SET_VA);           \
132	if (sync || ALWAYS_SYNC) xen_flush_queue();     	\
133} while (/*CONSTCOND*/0)
134#define PD_SET_VA_MA(_pmap, _ptp, _npte, sync) do {		\
135        PMAP_REF((_ptp), (_npte));                              \
136        pd_set((_pmap),(_ptp),(_npte), SH_PD_SET_VA_MA);        \
137	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
138} while (/*CONSTCOND*/0)
139#define PD_CLEAR_VA(_pmap, _ptp, sync) do {			\
140        PMAP_REF((pt_entry_t *)(_ptp), 0);                      \
141        pd_set((_pmap),(_ptp), 0, SH_PD_SET_VA_CLEAR);  	\
142	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
143} while (/*CONSTCOND*/0)
144
145#else /* !WRITABLE_PAGETABLES */
146
147#define PT_SET_VA(_ptp,_npte,sync) do {				\
148        PMAP_REF((_ptp), xpmap_ptom(_npte));                    \
149	xen_queue_pt_update(vtomach(_ptp), 	        \
150			    xpmap_ptom(_npte)); 		\
151	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
152} while (/*CONSTCOND*/0)
153#define PT_SET_VA_MA(_ptp,_npte,sync) do {		        \
154        PMAP_REF((_ptp), (_npte));                              \
155	xen_queue_pt_update(vtomach(_ptp), _npte);        \
156	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
157} while (/*CONSTCOND*/0)
158#define PT_CLEAR_VA(_ptp, sync) do {				\
159        PMAP_REF((pt_entry_t *)(_ptp), 0);                      \
160	xen_queue_pt_update(vtomach(_ptp), 0);            \
161	if (sync || ALWAYS_SYNC)				\
162		xen_flush_queue();				\
163} while (/*CONSTCOND*/0)
164
165#define PD_SET_VA(_pmap, _ptepindex,_npte,sync) do {		\
166        PMAP_REF((_ptp), xpmap_ptom(_npte));                    \
167        pd_set((_pmap),(_ptepindex),(_npte), SH_PD_SET_VA);     \
168	if (sync || ALWAYS_SYNC) xen_flush_queue();     	\
169} while (/*CONSTCOND*/0)
170#define PD_SET_VA_MA(_pmap, _ptepindex,_npte,sync) do {		\
171        PMAP_REF((_ptp), (_npte));                              \
172        pd_set((_pmap),(_ptepindex),(_npte), SH_PD_SET_VA_MA);  \
173	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
174} while (/*CONSTCOND*/0)
175#define PD_CLEAR_VA(_pmap, _ptepindex, sync) do {		\
176        PMAP_REF((pt_entry_t *)(_ptp), 0);                      \
177        pd_set((_pmap),(_ptepindex), 0, SH_PD_SET_VA_CLEAR);    \
178	if (sync || ALWAYS_SYNC) xen_flush_queue();		\
179} while (/*CONSTCOND*/0)
180
181#endif
182
183#define PT_SET_MA(_va, _ma) 					\
184do { 								\
185   PANIC_IF(HYPERVISOR_update_va_mapping(((unsigned long)(_va)),\
186	   (_ma),						\
187	   UVMF_INVLPG| UVMF_ALL) < 0);			\
188} while (/*CONSTCOND*/0)
189
190#define	PT_UPDATES_FLUSH() do {				        \
191        xen_flush_queue();                                      \
192} while (/*CONSTCOND*/0)
193
194static __inline vm_paddr_t
195xpmap_mtop(vm_paddr_t mpa)
196{
197	vm_paddr_t tmp = (mpa & PG_FRAME);
198
199	return machtophys(tmp) | (mpa & ~PG_FRAME);
200}
201
202static __inline vm_paddr_t
203xpmap_ptom(vm_paddr_t ppa)
204{
205	vm_paddr_t tmp = (ppa & PG_FRAME);
206
207	return phystomach(tmp) | (ppa & ~PG_FRAME);
208}
209
210static __inline void
211set_phys_to_machine(unsigned long pfn, unsigned long mfn)
212{
213#ifdef notyet
214        PANIC_IF(max_mapnr && pfn >= max_mapnr);
215#endif
216        if (xen_feature(XENFEAT_auto_translated_physmap)) {
217#ifdef notyet
218                PANIC_IF((pfn != mfn && mfn != INVALID_P2M_ENTRY));
219#endif
220                return;
221        }
222        xen_phys_machine[pfn] = mfn;
223}
224
225
226
227
228#endif /* _XEN_XENPMAP_H_ */
229