1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) Peter Wemm 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 AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31#ifndef _MACHINE_PCPU_H_ 32#define _MACHINE_PCPU_H_ 33 34#ifndef _SYS_CDEFS_H_ 35#error "sys/cdefs.h is a prerequisite for this file" 36#endif 37 38#include <machine/segments.h> 39#include <machine/tss.h> 40 41#include <sys/_lock.h> 42#include <sys/_mutex.h> 43 44struct monitorbuf { 45 int idle_state; /* Used by cpu_idle_mwait. */ 46 int stop_state; /* Used by cpustop_handler. */ 47 char padding[128 - (2 * sizeof(int))]; 48}; 49_Static_assert(sizeof(struct monitorbuf) == 128, "2x cache line"); 50 51/* 52 * The SMP parts are setup in pmap.c and machdep.c for the BSP, and 53 * pmap.c and mp_machdep.c sets up the data for the AP's to "see" when 54 * they awake. The reason for doing it via a struct is so that an 55 * array of pointers to each CPU's data can be set up for things like 56 * "check curproc on all other processors" 57 */ 58 59#define PCPU_MD_FIELDS \ 60 struct monitorbuf pc_monitorbuf __aligned(128); /* cache line */\ 61 struct pcpu *pc_prvspace; /* Self-reference */ \ 62 struct pmap *pc_curpmap; \ 63 struct segment_descriptor pc_common_tssd; \ 64 struct segment_descriptor *pc_tss_gdt; \ 65 struct segment_descriptor *pc_fsgs_gdt; \ 66 struct i386tss *pc_common_tssp; \ 67 u_int pc_kesp0; \ 68 u_int pc_trampstk; \ 69 int pc_currentldt; \ 70 u_int pc_acpi_id; /* ACPI CPU id */ \ 71 u_int pc_apic_id; \ 72 int pc_private_tss; /* Flag indicating private tss*/\ 73 u_int pc_cmci_mask; /* MCx banks for CMCI */ \ 74 u_int pc_vcpu_id; /* Xen vCPU ID */ \ 75 struct mtx pc_cmap_lock; \ 76 void *pc_cmap_pte1; \ 77 void *pc_cmap_pte2; \ 78 caddr_t pc_cmap_addr1; \ 79 caddr_t pc_cmap_addr2; \ 80 vm_offset_t pc_qmap_addr; /* KVA for temporary mappings */\ 81 vm_offset_t pc_copyout_maddr; \ 82 vm_offset_t pc_copyout_saddr; \ 83 struct mtx pc_copyout_mlock; \ 84 struct sx pc_copyout_slock; \ 85 char *pc_copyout_buf; \ 86 vm_offset_t pc_pmap_eh_va; \ 87 caddr_t pc_pmap_eh_ptep; \ 88 uint32_t pc_smp_tlb_done; /* TLB op acknowledgement */ \ 89 uint32_t pc_ibpb_set; \ 90 void *pc_mds_buf; \ 91 void *pc_mds_buf64; \ 92 uint32_t pc_pad[4]; \ 93 uint8_t pc_mds_tmp[64]; \ 94 u_int pc_ipi_bitmap; \ 95 char __pad[3518] 96 97#ifdef _KERNEL 98 99#define MONITOR_STOPSTATE_RUNNING 0 100#define MONITOR_STOPSTATE_STOPPED 1 101 102#if defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) 103 104/* 105 * Evaluates to the byte offset of the per-cpu variable name. 106 */ 107#define __pcpu_offset(name) \ 108 __offsetof(struct pcpu, name) 109 110/* 111 * Evaluates to the type of the per-cpu variable name. 112 */ 113#define __pcpu_type(name) \ 114 __typeof(((struct pcpu *)0)->name) 115 116/* 117 * Evaluates to the address of the per-cpu variable name. 118 */ 119#define __PCPU_PTR(name) __extension__ ({ \ 120 __pcpu_type(name) *__p; \ 121 \ 122 __asm __volatile("movl %%fs:%1,%0; addl %2,%0" \ 123 : "=r" (__p) \ 124 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \ 125 "i" (__pcpu_offset(name))); \ 126 \ 127 __p; \ 128}) 129 130/* 131 * Evaluates to the value of the per-cpu variable name. 132 */ 133#define __PCPU_GET(name) __extension__ ({ \ 134 __pcpu_type(name) __res; \ 135 struct __s { \ 136 u_char __b[MIN(sizeof(__res), 4)]; \ 137 } __s; \ 138 \ 139 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \ 140 sizeof(__res) == 4) { \ 141 __asm __volatile("mov %%fs:%1,%0" \ 142 : "=r" (__s) \ 143 : "m" (*(struct __s *)(__pcpu_offset(name)))); \ 144 *(struct __s *)(void *)&__res = __s; \ 145 } else { \ 146 __res = *__PCPU_PTR(name); \ 147 } \ 148 __res; \ 149}) 150 151/* 152 * Adds a value of the per-cpu counter name. The implementation 153 * must be atomic with respect to interrupts. 154 */ 155#define __PCPU_ADD(name, val) do { \ 156 __pcpu_type(name) __val; \ 157 struct __s { \ 158 u_char __b[MIN(sizeof(__val), 4)]; \ 159 } __s; \ 160 \ 161 __val = (val); \ 162 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \ 163 sizeof(__val) == 4) { \ 164 __s = *(struct __s *)(void *)&__val; \ 165 __asm __volatile("add %1,%%fs:%0" \ 166 : "=m" (*(struct __s *)(__pcpu_offset(name))) \ 167 : "r" (__s)); \ 168 } else \ 169 *__PCPU_PTR(name) += __val; \ 170} while (0) 171 172/* 173 * Increments the value of the per-cpu counter name. The implementation 174 * must be atomic with respect to interrupts. 175 */ 176#define __PCPU_INC(name) do { \ 177 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \ 178 sizeof(__pcpu_type(name)) == 2 || \ 179 sizeof(__pcpu_type(name)) == 4); \ 180 if (sizeof(__pcpu_type(name)) == 1) { \ 181 __asm __volatile("incb %%fs:%0" \ 182 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\ 183 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\ 184 } else if (sizeof(__pcpu_type(name)) == 2) { \ 185 __asm __volatile("incw %%fs:%0" \ 186 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\ 187 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\ 188 } else if (sizeof(__pcpu_type(name)) == 4) { \ 189 __asm __volatile("incl %%fs:%0" \ 190 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\ 191 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\ 192 } \ 193} while (0) 194 195/* 196 * Sets the value of the per-cpu variable name to value val. 197 */ 198#define __PCPU_SET(name, val) do { \ 199 __pcpu_type(name) __val; \ 200 struct __s { \ 201 u_char __b[MIN(sizeof(__val), 4)]; \ 202 } __s; \ 203 \ 204 __val = (val); \ 205 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \ 206 sizeof(__val) == 4) { \ 207 __s = *(struct __s *)(void *)&__val; \ 208 __asm __volatile("mov %1,%%fs:%0" \ 209 : "=m" (*(struct __s *)(__pcpu_offset(name))) \ 210 : "r" (__s)); \ 211 } else { \ 212 *__PCPU_PTR(name) = __val; \ 213 } \ 214} while (0) 215 216#define get_pcpu() __extension__ ({ \ 217 struct pcpu *__pc; \ 218 \ 219 __asm __volatile("movl %%fs:%1,%0" \ 220 : "=r" (__pc) \ 221 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace)))); \ 222 __pc; \ 223}) 224 225#define PCPU_GET(member) __PCPU_GET(pc_ ## member) 226#define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val) 227#define PCPU_INC(member) __PCPU_INC(pc_ ## member) 228#define PCPU_PTR(member) __PCPU_PTR(pc_ ## member) 229#define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val) 230 231#define IS_BSP() (PCPU_GET(cpuid) == 0) 232 233#else /* defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */ 234 235#error "this file needs to be ported to your compiler" 236 237#endif /* __GNUCLIKE_ASM etc. */ 238 239#endif /* _KERNEL */ 240 241#endif /* !_MACHINE_PCPU_H_ */ 242