1 /* $NetBSD: pmap.h,v 1.66 2020/05/15 22:17:45 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) do { *(p) = (n); } while (0) 206 #define pmap_pte_cas(p, o, n) atomic_cas_64((p), (o), (n)) 207 #define pmap_pte_testset(p, n) \ 208 atomic_swap_ulong((volatile unsigned long *)p, n) 209 #define pmap_pte_setbits(p, b) \ 210 atomic_or_ulong((volatile unsigned long *)p, b) 211 #define pmap_pte_clearbits(p, b) \ 212 atomic_and_ulong((volatile unsigned long *)p, ~(b)) 213 #define pmap_pte_flush() /* nothing */ 214 #else 215 extern kmutex_t pte_lock; 216 217 static __inline pt_entry_t 218 pmap_pa2pte(paddr_t pa) 219 { 220 return (pt_entry_t)xpmap_ptom_masked(pa); 221 } 222 223 static __inline paddr_t 224 pmap_pte2pa(pt_entry_t pte) 225 { 226 return xpmap_mtop_masked(pte & PTE_FRAME); 227 } 228 229 static __inline void 230 pmap_pte_set(pt_entry_t *pte, pt_entry_t npte) 231 { 232 int s = splvm(); 233 xpq_queue_pte_update(xpmap_ptetomach(pte), npte); 234 splx(s); 235 } 236 237 static __inline pt_entry_t 238 pmap_pte_cas(volatile pt_entry_t *ptep, pt_entry_t o, pt_entry_t n) 239 { 240 pt_entry_t opte; 241 242 mutex_enter(&pte_lock); 243 opte = *ptep; 244 if (opte == o) { 245 xpq_queue_pte_update(xpmap_ptetomach(__UNVOLATILE(ptep)), n); 246 xpq_flush_queue(); 247 } 248 249 mutex_exit(&pte_lock); 250 return opte; 251 } 252 253 static __inline pt_entry_t 254 pmap_pte_testset(volatile pt_entry_t *pte, pt_entry_t npte) 255 { 256 pt_entry_t opte; 257 258 mutex_enter(&pte_lock); 259 opte = *pte; 260 xpq_queue_pte_update(xpmap_ptetomach(__UNVOLATILE(pte)), npte); 261 xpq_flush_queue(); 262 mutex_exit(&pte_lock); 263 return opte; 264 } 265 266 static __inline void 267 pmap_pte_setbits(volatile pt_entry_t *pte, pt_entry_t bits) 268 { 269 mutex_enter(&pte_lock); 270 xpq_queue_pte_update(xpmap_ptetomach(__UNVOLATILE(pte)), (*pte) | bits); 271 xpq_flush_queue(); 272 mutex_exit(&pte_lock); 273 } 274 275 static __inline void 276 pmap_pte_clearbits(volatile pt_entry_t *pte, pt_entry_t bits) 277 { 278 mutex_enter(&pte_lock); 279 xpq_queue_pte_update(xpmap_ptetomach(__UNVOLATILE(pte)), 280 (*pte) & ~bits); 281 xpq_flush_queue(); 282 mutex_exit(&pte_lock); 283 } 284 285 static __inline void 286 pmap_pte_flush(void) 287 { 288 int s = splvm(); 289 xpq_flush_queue(); 290 splx(s); 291 } 292 #endif 293 294 #ifdef __HAVE_DIRECT_MAP 295 #define PMAP_DIRECT 296 297 static __inline int 298 pmap_direct_process(paddr_t pa, voff_t pgoff, size_t len, 299 int (*process)(void *, size_t, void *), void *arg) 300 { 301 vaddr_t va = PMAP_DIRECT_MAP(pa); 302 303 return process((void *)(va + pgoff), len, arg); 304 } 305 306 #endif /* __HAVE_DIRECT_MAP */ 307 308 void pmap_changeprot_local(vaddr_t, vm_prot_t); 309 310 #include <x86/pmap_pv.h> 311 312 #define __HAVE_VM_PAGE_MD 313 #define VM_MDPAGE_INIT(pg) \ 314 memset(&(pg)->mdpage, 0, sizeof((pg)->mdpage)); \ 315 PMAP_PAGE_INIT(&(pg)->mdpage.mp_pp) 316 317 struct vm_page_md { 318 struct pmap_page mp_pp; 319 }; 320 321 #else /* !__x86_64__ */ 322 323 #include <i386/pmap.h> 324 325 #endif /* __x86_64__ */ 326 327 #endif /* _AMD64_PMAP_H_ */ 328