1 /* $NetBSD: pmap.h,v 1.65 2020/03/17 18:17:07 ad Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Charles D. Cranor and Washington University. 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * Copyright (c) 2001 Wasabi Systems, Inc. 30 * All rights reserved. 31 * 32 * Written by Frank van der Linden for Wasabi Systems, Inc. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed for the NetBSD Project by 45 * Wasabi Systems, Inc. 46 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 47 * or promote products derived from this software without specific prior 48 * written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 52 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 53 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 54 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 55 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 56 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 57 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 58 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 59 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 60 * POSSIBILITY OF SUCH DAMAGE. 61 */ 62 63 #ifndef _AMD64_PMAP_H_ 64 #define _AMD64_PMAP_H_ 65 66 #ifdef __x86_64__ 67 68 #if defined(_KERNEL_OPT) 69 #include "opt_xen.h" 70 #include "opt_kasan.h" 71 #include "opt_kmsan.h" 72 #include "opt_kubsan.h" 73 #endif 74 75 #include <sys/atomic.h> 76 77 #include <machine/pte.h> 78 #include <machine/segments.h> 79 #ifdef _KERNEL 80 #include <machine/cpufunc.h> 81 #endif 82 83 #include <uvm/uvm_object.h> 84 #ifdef XENPV 85 #include <xen/xenfunc.h> 86 #include <xen/xenpmap.h> 87 #endif 88 89 /* 90 * Mask to get rid of the sign-extended part of addresses. 91 */ 92 #define VA_SIGN_MASK 0xffff000000000000 93 #define VA_SIGN_NEG(va) ((va) | VA_SIGN_MASK) 94 /* XXXfvdl this one's not right. */ 95 #define VA_SIGN_POS(va) ((va) & ~VA_SIGN_MASK) 96 97 #ifdef KASAN 98 #define L4_SLOT_KASAN 256 99 #define NL4_SLOT_KASAN 32 100 #endif 101 102 #ifdef KMSAN 103 #define L4_SLOT_KMSAN 256 104 #define NL4_SLOT_KMSAN 4 105 #endif 106 107 #define NL4_SLOT_DIRECT 32 108 109 #ifndef XENPV 110 #define L4_SLOT_PTE slotspace.area[SLAREA_PTE].sslot 111 #else 112 #define L4_SLOT_PTE 509 113 #endif 114 #define L4_SLOT_KERN slotspace.area[SLAREA_MAIN].sslot 115 #define L4_SLOT_KERNBASE 511 /* pl4_i(KERNBASE) */ 116 117 #define PDIR_SLOT_USERLIM 255 118 #define PDIR_SLOT_KERN L4_SLOT_KERN 119 #define PDIR_SLOT_PTE L4_SLOT_PTE 120 121 /* 122 * The following defines give the virtual addresses of various MMU 123 * data structures: 124 * PTE_BASE: the base VA of the linear PTE mappings 125 * PDP_BASE: the base VA of the recursive mapping of the PTD 126 */ 127 128 #ifndef XENPV 129 extern pt_entry_t *pte_base; 130 #define PTE_BASE pte_base 131 #else 132 #define PTE_BASE ((pt_entry_t *)VA_SIGN_NEG((L4_SLOT_PTE * NBPD_L4))) 133 #endif 134 135 #define L1_BASE PTE_BASE 136 #define L2_BASE ((pd_entry_t *)((char *)L1_BASE + L4_SLOT_PTE * NBPD_L3)) 137 #define L3_BASE ((pd_entry_t *)((char *)L2_BASE + L4_SLOT_PTE * NBPD_L2)) 138 #define L4_BASE ((pd_entry_t *)((char *)L3_BASE + L4_SLOT_PTE * NBPD_L1)) 139 140 #define PDP_BASE L4_BASE 141 142 #if defined(KMSAN) 143 #define NKL4_MAX_ENTRIES (unsigned long)1 /* 512GB only */ 144 #else 145 #define NKL4_MAX_ENTRIES (unsigned long)64 146 #endif 147 #define NKL3_MAX_ENTRIES (unsigned long)(NKL4_MAX_ENTRIES * 512) 148 #define NKL2_MAX_ENTRIES (unsigned long)(NKL3_MAX_ENTRIES * 512) 149 #define NKL1_MAX_ENTRIES (unsigned long)(NKL2_MAX_ENTRIES * 512) 150 151 #define NKL4_KIMG_ENTRIES 1 152 #define NKL3_KIMG_ENTRIES 1 153 #if defined(KUBSAN) || defined(KMSAN) 154 #define NKL2_KIMG_ENTRIES 64 /* really big kernel */ 155 #else 156 #define NKL2_KIMG_ENTRIES 48 157 #endif 158 159 /* 160 * Since kva space is below the kernel in its entirety, we start off 161 * with zero entries on each level. 162 */ 163 #define NKL4_START_ENTRIES 0 164 #define NKL3_START_ENTRIES 0 165 #define NKL2_START_ENTRIES 0 166 #define NKL1_START_ENTRIES 0 167 168 #define PTP_MASK_INITIALIZER { L1_MASK, L2_MASK, L3_MASK, L4_MASK } 169 #define PTP_FRAME_INITIALIZER { L1_FRAME, L2_FRAME, L3_FRAME, L4_FRAME } 170 #define PTP_SHIFT_INITIALIZER { L1_SHIFT, L2_SHIFT, L3_SHIFT, L4_SHIFT } 171 #define NKPTP_INITIALIZER { NKL1_START_ENTRIES, NKL2_START_ENTRIES, \ 172 NKL3_START_ENTRIES, NKL4_START_ENTRIES } 173 #define NKPTPMAX_INITIALIZER { NKL1_MAX_ENTRIES, NKL2_MAX_ENTRIES, \ 174 NKL3_MAX_ENTRIES, NKL4_MAX_ENTRIES } 175 #define NBPD_INITIALIZER { NBPD_L1, NBPD_L2, NBPD_L3, NBPD_L4 } 176 #define PDES_INITIALIZER { L2_BASE, L3_BASE, L4_BASE } 177 178 #define PTP_LEVELS 4 179 180 /* 181 * PTE_AVL usage: we make use of the ignored bits of the PTE 182 */ 183 #define PTE_WIRED PTE_AVL1 /* Wired Mapping */ 184 #define PTE_PVLIST PTE_AVL2 /* Mapping has entry on pvlist */ 185 #define PTE_X 0 /* Dummy */ 186 187 /* XXX To be deleted. */ 188 #define PG_W PTE_WIRED 189 #define PG_PVLIST PTE_PVLIST 190 #define PG_X PTE_X 191 192 void svs_pmap_sync(struct pmap *, int); 193 void svs_ldt_sync(struct pmap *); 194 void svs_lwp_switch(struct lwp *, struct lwp *); 195 void svs_pdir_switch(struct pmap *); 196 void svs_init(void); 197 extern bool svs_enabled; 198 extern bool svs_pcid; 199 200 #include <x86/pmap.h> 201 202 #ifndef XENPV 203 #define pmap_pa2pte(a) (a) 204 #define pmap_pte2pa(a) ((a) & PTE_FRAME) 205 #define pmap_pte_set(p, n) \ 206 (void)atomic_swap_ulong((volatile unsigned long *)p, n) 207 #define pmap_pte_cas(p, o, n) atomic_cas_64((p), (o), (n)) 208 #define pmap_pte_testset(p, n) \ 209 atomic_swap_ulong((volatile unsigned long *)p, n) 210 #define pmap_pte_setbits(p, b) \ 211 atomic_or_ulong((volatile unsigned long *)p, b) 212 #define pmap_pte_clearbits(p, b) \ 213 atomic_and_ulong((volatile unsigned long *)p, ~(b)) 214 #define pmap_pte_flush() /* nothing */ 215 #else 216 extern kmutex_t pte_lock; 217 218 static __inline pt_entry_t 219 pmap_pa2pte(paddr_t pa) 220 { 221 return (pt_entry_t)xpmap_ptom_masked(pa); 222 } 223 224 static __inline paddr_t 225 pmap_pte2pa(pt_entry_t pte) 226 { 227 return xpmap_mtop_masked(pte & PTE_FRAME); 228 } 229 230 static __inline void 231 pmap_pte_set(pt_entry_t *pte, pt_entry_t npte) 232 { 233 int s = splvm(); 234 xpq_queue_pte_update(xpmap_ptetomach(pte), npte); 235 splx(s); 236 } 237 238 static __inline pt_entry_t 239 pmap_pte_cas(volatile pt_entry_t *ptep, pt_entry_t o, pt_entry_t n) 240 { 241 pt_entry_t opte; 242 243 mutex_enter(&pte_lock); 244 opte = *ptep; 245 if (opte == o) { 246 xpq_queue_pte_update(xpmap_ptetomach(__UNVOLATILE(ptep)), n); 247 xpq_flush_queue(); 248 } 249 250 mutex_exit(&pte_lock); 251 return opte; 252 } 253 254 static __inline pt_entry_t 255 pmap_pte_testset(volatile pt_entry_t *pte, pt_entry_t npte) 256 { 257 pt_entry_t opte; 258 259 mutex_enter(&pte_lock); 260 opte = *pte; 261 xpq_queue_pte_update(xpmap_ptetomach(__UNVOLATILE(pte)), npte); 262 xpq_flush_queue(); 263 mutex_exit(&pte_lock); 264 return opte; 265 } 266 267 static __inline void 268 pmap_pte_setbits(volatile pt_entry_t *pte, pt_entry_t bits) 269 { 270 mutex_enter(&pte_lock); 271 xpq_queue_pte_update(xpmap_ptetomach(__UNVOLATILE(pte)), (*pte) | bits); 272 xpq_flush_queue(); 273 mutex_exit(&pte_lock); 274 } 275 276 static __inline void 277 pmap_pte_clearbits(volatile pt_entry_t *pte, pt_entry_t bits) 278 { 279 mutex_enter(&pte_lock); 280 xpq_queue_pte_update(xpmap_ptetomach(__UNVOLATILE(pte)), 281 (*pte) & ~bits); 282 xpq_flush_queue(); 283 mutex_exit(&pte_lock); 284 } 285 286 static __inline void 287 pmap_pte_flush(void) 288 { 289 int s = splvm(); 290 xpq_flush_queue(); 291 splx(s); 292 } 293 #endif 294 295 #ifdef __HAVE_DIRECT_MAP 296 #define PMAP_DIRECT 297 298 static __inline int 299 pmap_direct_process(paddr_t pa, voff_t pgoff, size_t len, 300 int (*process)(void *, size_t, void *), void *arg) 301 { 302 vaddr_t va = PMAP_DIRECT_MAP(pa); 303 304 return process((void *)(va + pgoff), len, arg); 305 } 306 307 #endif /* __HAVE_DIRECT_MAP */ 308 309 void pmap_changeprot_local(vaddr_t, vm_prot_t); 310 311 #include <x86/pmap_pv.h> 312 313 #define __HAVE_VM_PAGE_MD 314 #define VM_MDPAGE_INIT(pg) \ 315 memset(&(pg)->mdpage, 0, sizeof((pg)->mdpage)); \ 316 PMAP_PAGE_INIT(&(pg)->mdpage.mp_pp) 317 318 struct vm_page_md { 319 struct pmap_page mp_pp; 320 }; 321 322 #else /* !__x86_64__ */ 323 324 #include <i386/pmap.h> 325 326 #endif /* __x86_64__ */ 327 328 #endif /* _AMD64_PMAP_H_ */ 329