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NEX-16970 assertion failed: ht->ht_valid_cnt >= 0, file: ../../i86pc/vm/htable.c, line: 1204
Reviewed by: Sanjay Nadkarni <sanjay.nadkarni@nexenta.com>
Reviewed by: Evan Layton <evan.layton@nexenta.com>
Reviewed by: Rob Gittins <rob.gittins@nexenta.com>
Reviewed by: Yuri Pankov <yuri.pankov@nexenta.com>
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--- old/usr/src/uts/i86pc/vm/hat_i86.h
+++ new/usr/src/uts/i86pc/vm/hat_i86.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
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17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23 23 * Use is subject to license terms.
24 24 */
25 25 /*
26 26 * Copyright (c) 2014 by Delphix. All rights reserved.
27 + * Copyright 2019 Nexenta Systems, Inc.
27 28 */
28 29
29 30 #ifndef _VM_HAT_I86_H
30 31 #define _VM_HAT_I86_H
31 32
32 33
33 34 #ifdef __cplusplus
34 35 extern "C" {
35 36 #endif
36 37
37 38 /*
38 39 * VM - Hardware Address Translation management.
39 40 *
40 41 * This file describes the contents of the x86_64 HAT data structures.
41 42 */
42 43 #include <sys/types.h>
43 44 #include <sys/t_lock.h>
44 45 #include <sys/cpuvar.h>
45 46 #include <sys/x_call.h>
46 47 #include <vm/seg.h>
47 48 #include <vm/page.h>
48 49 #include <sys/vmparam.h>
49 50 #include <sys/vm_machparam.h>
50 51 #include <sys/promif.h>
51 52 #include <vm/hat_pte.h>
52 53 #include <vm/htable.h>
53 54 #include <vm/hment.h>
54 55
55 56 /*
56 57 * The essential data types involved:
57 58 *
58 59 * htable_t - There is one of these for each page table and it is used
59 60 * by the HAT to manage the page table.
60 61 *
61 62 * hment_t - Links together multiple PTEs to a single page.
62 63 */
63 64
64 65 /*
65 66 * VLP processes have a 32 bit address range, so their top level is 2 and
66 67 * with only 4 PTEs in that table.
67 68 */
68 69 #define VLP_LEVEL (2)
69 70 #define VLP_NUM_PTES (4)
70 71 #define VLP_SIZE (VLP_NUM_PTES * sizeof (x86pte_t))
71 72 #define TOP_LEVEL(h) (((h)->hat_flags & HAT_VLP) ? VLP_LEVEL : mmu.max_level)
72 73 #define VLP_COPY(fromptep, toptep) { \
73 74 toptep[0] = fromptep[0]; \
74 75 toptep[1] = fromptep[1]; \
75 76 toptep[2] = fromptep[2]; \
76 77 toptep[3] = fromptep[3]; \
77 78 }
78 79
79 80 /*
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80 81 * The hat struct exists for each address space.
81 82 */
82 83 struct hat {
83 84 kmutex_t hat_mutex;
84 85 struct as *hat_as;
85 86 uint_t hat_stats;
86 87 pgcnt_t hat_pages_mapped[MAX_PAGE_LEVEL + 1];
87 88 pgcnt_t hat_ism_pgcnt;
88 89 cpuset_t hat_cpus;
89 90 uint16_t hat_flags;
91 + uint16_t hat_unmaps; /* stop hat being free'd during unmap */
90 92 htable_t *hat_htable; /* top level htable */
91 93 struct hat *hat_next;
92 94 struct hat *hat_prev;
93 95 uint_t hat_num_hash; /* number of htable hash buckets */
94 96 htable_t **hat_ht_hash; /* htable hash buckets */
95 97 htable_t *hat_ht_cached; /* cached free htables */
96 98 x86pte_t hat_vlp_ptes[VLP_NUM_PTES];
97 99 #if defined(__amd64) && defined(__xpv)
98 100 pfn_t hat_user_ptable; /* alt top ptable for user mode */
99 101 #endif
100 102 };
101 103 typedef struct hat hat_t;
102 104
103 105 #define PGCNT_INC(hat, level) \
104 106 atomic_inc_ulong(&(hat)->hat_pages_mapped[level]);
105 107 #define PGCNT_DEC(hat, level) \
106 108 atomic_dec_ulong(&(hat)->hat_pages_mapped[level]);
107 109
108 110 /*
109 111 * Flags for the hat_flags field
110 112 *
111 113 * HAT_FREEING - set when HAT is being destroyed - mostly used to detect that
112 114 * demap()s can be avoided.
113 115 *
114 116 * HAT_VLP - indicates a 32 bit process has a virtual address range less than
115 117 * the hardware's physical address range. (VLP->Virtual Less-than Physical)
116 118 * Note - never used on the hypervisor.
117 119 *
118 120 * HAT_VICTIM - This is set while a hat is being examined for page table
119 121 * stealing and prevents it from being freed.
120 122 *
121 123 * HAT_SHARED - The hat has exported it's page tables via hat_share()
122 124 *
123 125 * HAT_PINNED - On the hypervisor, indicates the top page table has been pinned.
124 126 */
125 127 #define HAT_FREEING (0x0001)
126 128 #define HAT_VLP (0x0002)
127 129 #define HAT_VICTIM (0x0004)
128 130 #define HAT_SHARED (0x0008)
129 131 #define HAT_PINNED (0x0010)
130 132
131 133 /*
132 134 * Additional platform attribute for hat_devload() to force no caching.
133 135 */
134 136 #define HAT_PLAT_NOCACHE (0x100000)
135 137
136 138 /*
137 139 * Simple statistics for the HAT. These are just counters that are
138 140 * atomically incremented. They can be reset directly from the kernel
139 141 * debugger.
140 142 */
141 143 struct hatstats {
142 144 ulong_t hs_reap_attempts;
143 145 ulong_t hs_reaped;
144 146 ulong_t hs_steals;
145 147 ulong_t hs_ptable_allocs;
146 148 ulong_t hs_ptable_frees;
147 149 ulong_t hs_htable_rgets; /* allocs from reserve */
148 150 ulong_t hs_htable_rputs; /* putbacks to reserve */
149 151 ulong_t hs_htable_shared; /* number of htables shared */
150 152 ulong_t hs_htable_unshared; /* number of htables unshared */
151 153 ulong_t hs_hm_alloc;
152 154 ulong_t hs_hm_free;
153 155 ulong_t hs_hm_put_reserve;
154 156 ulong_t hs_hm_get_reserve;
155 157 ulong_t hs_hm_steals;
156 158 ulong_t hs_hm_steal_exam;
157 159 ulong_t hs_tlb_inval_delayed;
158 160 };
159 161 extern struct hatstats hatstat;
160 162 #ifdef DEBUG
161 163 #define HATSTAT_INC(x) (++hatstat.x)
162 164 #else
163 165 #define HATSTAT_INC(x) (0)
164 166 #endif
165 167
166 168 #if defined(_KERNEL)
167 169
168 170 /*
169 171 * Useful macro to align hat_XXX() address arguments to a page boundary
170 172 */
171 173 #define ALIGN2PAGE(a) ((uintptr_t)(a) & MMU_PAGEMASK)
172 174 #define IS_PAGEALIGNED(a) (((uintptr_t)(a) & MMU_PAGEOFFSET) == 0)
173 175
174 176 extern uint_t khat_running; /* set at end of hat_kern_setup() */
175 177 extern cpuset_t khat_cpuset; /* cpuset for kernal address demap Xcalls */
176 178 extern kmutex_t hat_list_lock;
177 179 extern kcondvar_t hat_list_cv;
178 180
179 181
180 182
181 183 /*
182 184 * Interfaces to setup a cpu private mapping (ie. preemption disabled).
183 185 * The attr and flags arguments are the same as for hat_devload().
184 186 * setup() must be called once, then any number of calls to remap(),
185 187 * followed by a final call to release()
186 188 *
187 189 * Used by ppcopy(), page_zero(), the memscrubber, and the kernel debugger.
188 190 */
189 191 typedef paddr_t hat_mempte_t; /* phys addr of PTE */
190 192 extern hat_mempte_t hat_mempte_setup(caddr_t addr);
191 193 extern void hat_mempte_remap(pfn_t, caddr_t, hat_mempte_t,
192 194 uint_t attr, uint_t flags);
193 195 extern void hat_mempte_release(caddr_t addr, hat_mempte_t);
194 196
195 197 /*
196 198 * Interfaces to manage which thread has access to htable and hment reserves.
197 199 * The USE_HAT_RESERVES macro should always be recomputed in full. Its value
198 200 * (due to curthread) can change after any call into kmem/vmem.
199 201 */
200 202 extern uint_t can_steal_post_boot;
201 203 extern uint_t use_boot_reserve;
202 204 #define USE_HAT_RESERVES() \
203 205 (use_boot_reserve || curthread->t_hatdepth > 1 || \
204 206 panicstr != NULL || vmem_is_populator())
205 207
206 208 /*
207 209 * initialization stuff needed by by startup, mp_startup...
208 210 */
209 211 extern void hat_cpu_online(struct cpu *);
210 212 extern void hat_cpu_offline(struct cpu *);
211 213 extern void setup_vaddr_for_ppcopy(struct cpu *);
212 214 extern void teardown_vaddr_for_ppcopy(struct cpu *);
213 215 extern void clear_boot_mappings(uintptr_t, uintptr_t);
214 216
215 217 /*
216 218 * magic value to indicate that all TLB entries should be demapped.
217 219 */
218 220 #define DEMAP_ALL_ADDR (~(uintptr_t)0)
219 221
220 222 /*
221 223 * not in any include file???
222 224 */
223 225 extern void halt(char *fmt);
224 226
225 227 /*
226 228 * x86 specific routines for use online in setup or i86pc/vm files
227 229 */
228 230 extern void hat_kern_alloc(caddr_t segmap_base, size_t segmap_size,
229 231 caddr_t ekernelheap);
230 232 extern void hat_kern_setup(void);
231 233 extern void hat_tlb_inval(struct hat *hat, uintptr_t va);
232 234 extern void hat_pte_unmap(htable_t *ht, uint_t entry, uint_t flags,
233 235 x86pte_t old_pte, void *pte_ptr, boolean_t tlb);
234 236 extern void hat_init_finish(void);
235 237 extern caddr_t hat_kpm_pfn2va(pfn_t pfn);
236 238 extern pfn_t hat_kpm_va2pfn(caddr_t);
237 239 extern page_t *hat_kpm_vaddr2page(caddr_t);
238 240 extern uintptr_t hat_kernelbase(uintptr_t);
239 241 extern void hat_kmap_init(uintptr_t base, size_t len);
240 242
241 243 extern hment_t *hati_page_unmap(page_t *pp, htable_t *ht, uint_t entry);
242 244
243 245 #if !defined(__xpv)
244 246 /*
245 247 * routines to deal with delayed TLB invalidations for idle CPUs
246 248 */
247 249 extern void tlb_going_idle(void);
248 250 extern void tlb_service(void);
249 251 #endif
250 252
251 253 /*
252 254 * Hat switch function invoked to load a new context into %cr3
253 255 */
254 256 extern void hat_switch(struct hat *hat);
255 257
256 258 #ifdef __xpv
257 259 /*
258 260 * Interfaces to use around code that maps/unmaps grant table references.
259 261 */
260 262 extern void hat_prepare_mapping(hat_t *, caddr_t, uint64_t *);
261 263 extern void hat_release_mapping(hat_t *, caddr_t);
262 264
263 265 #define XPV_DISALLOW_MIGRATE() xen_block_migrate()
264 266 #define XPV_ALLOW_MIGRATE() xen_allow_migrate()
265 267
266 268 #else
267 269
268 270 #define XPV_DISALLOW_MIGRATE() /* nothing */
269 271 #define XPV_ALLOW_MIGRATE() /* nothing */
270 272
271 273 #define pfn_is_foreign(pfn) __lintzero
272 274
273 275 #endif
274 276
275 277
276 278 #endif /* _KERNEL */
277 279
278 280 #ifdef __cplusplus
279 281 }
280 282 #endif
281 283
282 284 #endif /* _VM_HAT_I86_H */
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