pmap.h revision 1.65
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 129extern 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 192void svs_pmap_sync(struct pmap *, int); 193void svs_ldt_sync(struct pmap *); 194void svs_lwp_switch(struct lwp *, struct lwp *); 195void svs_pdir_switch(struct pmap *); 196void svs_init(void); 197extern bool svs_enabled; 198extern 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 216extern kmutex_t pte_lock; 217 218static __inline pt_entry_t 219pmap_pa2pte(paddr_t pa) 220{ 221 return (pt_entry_t)xpmap_ptom_masked(pa); 222} 223 224static __inline paddr_t 225pmap_pte2pa(pt_entry_t pte) 226{ 227 return xpmap_mtop_masked(pte & PTE_FRAME); 228} 229 230static __inline void 231pmap_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 238static __inline pt_entry_t 239pmap_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 254static __inline pt_entry_t 255pmap_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 267static __inline void 268pmap_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 276static __inline void 277pmap_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 286static __inline void 287pmap_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 298static __inline int 299pmap_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 309void 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 318struct 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