1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 29 #ifndef _MACHINE_PCPU_H_ 30 #define _MACHINE_PCPU_H_ 31 32 #include <machine/segments.h> 33 #include <machine/tss.h> 34 35 #include <sys/_lock.h> 36 #include <sys/_mutex.h> 37 38 struct monitorbuf { 39 int idle_state; /* Used by cpu_idle_mwait. */ 40 int stop_state; /* Used by cpustop_handler. */ 41 char padding[128 - (2 * sizeof(int))]; 42 }; 43 _Static_assert(sizeof(struct monitorbuf) == 128, "2x cache line"); 44 45 /* 46 * The SMP parts are setup in pmap.c and machdep.c for the BSP, and 47 * pmap.c and mp_machdep.c sets up the data for the AP's to "see" when 48 * they awake. The reason for doing it via a struct is so that an 49 * array of pointers to each CPU's data can be set up for things like 50 * "check curproc on all other processors" 51 */ 52 53 #define PCPU_MD_FIELDS \ 54 struct monitorbuf pc_monitorbuf __aligned(128); /* cache line */\ 55 struct pcpu *pc_prvspace; /* Self-reference */ \ 56 struct pmap *pc_curpmap; \ 57 struct segment_descriptor pc_common_tssd; \ 58 struct segment_descriptor *pc_tss_gdt; \ 59 struct segment_descriptor *pc_fsgs_gdt; \ 60 struct i386tss *pc_common_tssp; \ 61 u_int pc_kesp0; \ 62 u_int pc_trampstk; \ 63 int pc_currentldt; \ 64 u_int pc_acpi_id; /* ACPI CPU id */ \ 65 u_int pc_apic_id; \ 66 int pc_private_tss; /* Flag indicating private tss*/\ 67 u_int pc_cmci_mask; /* MCx banks for CMCI */ \ 68 u_int pc_vcpu_id; /* Xen vCPU ID */ \ 69 struct mtx pc_cmap_lock; \ 70 void *pc_cmap_pte1; \ 71 void *pc_cmap_pte2; \ 72 caddr_t pc_cmap_addr1; \ 73 caddr_t pc_cmap_addr2; \ 74 vm_offset_t pc_qmap_addr; /* KVA for temporary mappings */\ 75 vm_offset_t pc_copyout_maddr; \ 76 vm_offset_t pc_copyout_saddr; \ 77 struct mtx pc_copyout_mlock; \ 78 struct sx pc_copyout_slock; \ 79 char *pc_copyout_buf; \ 80 vm_offset_t pc_pmap_eh_va; \ 81 caddr_t pc_pmap_eh_ptep; \ 82 uint32_t pc_smp_tlb_done; /* TLB op acknowledgement */ \ 83 uint32_t pc_ibpb_set; \ 84 void *pc_mds_buf; \ 85 void *pc_mds_buf64; \ 86 uint32_t pc_pad[4]; \ 87 uint8_t pc_mds_tmp[64]; \ 88 u_int pc_ipi_bitmap; \ 89 char __pad[3518] 90 91 #ifdef _KERNEL 92 93 #define MONITOR_STOPSTATE_RUNNING 0 94 #define MONITOR_STOPSTATE_STOPPED 1 95 96 /* 97 * Evaluates to the byte offset of the per-cpu variable name. 98 */ 99 #define __pcpu_offset(name) \ 100 __offsetof(struct pcpu, name) 101 102 /* 103 * Evaluates to the type of the per-cpu variable name. 104 */ 105 #define __pcpu_type(name) \ 106 __typeof(((struct pcpu *)0)->name) 107 108 /* 109 * Evaluates to the address of the per-cpu variable name. 110 */ 111 #define __PCPU_PTR(name) __extension__ ({ \ 112 __pcpu_type(name) *__p; \ 113 \ 114 __asm __volatile("movl %%fs:%1,%0; addl %2,%0" \ 115 : "=r" (__p) \ 116 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \ 117 "i" (__pcpu_offset(name))); \ 118 \ 119 __p; \ 120 }) 121 122 /* 123 * Evaluates to the value of the per-cpu variable name. 124 */ 125 #define __PCPU_GET(name) __extension__ ({ \ 126 __pcpu_type(name) __res; \ 127 struct __s { \ 128 u_char __b[MIN(sizeof(__res), 4)]; \ 129 } __s; \ 130 \ 131 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \ 132 sizeof(__res) == 4) { \ 133 __asm __volatile("mov %%fs:%1,%0" \ 134 : "=r" (__s) \ 135 : "m" (*(struct __s *)(__pcpu_offset(name)))); \ 136 *(struct __s *)(void *)&__res = __s; \ 137 } else { \ 138 __res = *__PCPU_PTR(name); \ 139 } \ 140 __res; \ 141 }) 142 143 /* 144 * Adds a value of the per-cpu counter name. The implementation 145 * must be atomic with respect to interrupts. 146 */ 147 #define __PCPU_ADD(name, val) do { \ 148 __pcpu_type(name) __val; \ 149 struct __s { \ 150 u_char __b[MIN(sizeof(__val), 4)]; \ 151 } __s; \ 152 \ 153 __val = (val); \ 154 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \ 155 sizeof(__val) == 4) { \ 156 __s = *(struct __s *)(void *)&__val; \ 157 __asm __volatile("add %1,%%fs:%0" \ 158 : "=m" (*(struct __s *)(__pcpu_offset(name))) \ 159 : "r" (__s)); \ 160 } else \ 161 *__PCPU_PTR(name) += __val; \ 162 } while (0) 163 164 /* 165 * Sets the value of the per-cpu variable name to value val. 166 */ 167 #define __PCPU_SET(name, val) do { \ 168 __pcpu_type(name) __val; \ 169 struct __s { \ 170 u_char __b[MIN(sizeof(__val), 4)]; \ 171 } __s; \ 172 \ 173 __val = (val); \ 174 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \ 175 sizeof(__val) == 4) { \ 176 __s = *(struct __s *)(void *)&__val; \ 177 __asm __volatile("mov %1,%%fs:%0" \ 178 : "=m" (*(struct __s *)(__pcpu_offset(name))) \ 179 : "r" (__s)); \ 180 } else { \ 181 *__PCPU_PTR(name) = __val; \ 182 } \ 183 } while (0) 184 185 #define get_pcpu() __extension__ ({ \ 186 struct pcpu *__pc; \ 187 \ 188 __asm __volatile("movl %%fs:%1,%0" \ 189 : "=r" (__pc) \ 190 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace)))); \ 191 __pc; \ 192 }) 193 194 #define PCPU_GET(member) __PCPU_GET(pc_ ## member) 195 #define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val) 196 #define PCPU_PTR(member) __PCPU_PTR(pc_ ## member) 197 #define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val) 198 199 #define IS_BSP() (PCPU_GET(cpuid) == 0) 200 201 #endif /* _KERNEL */ 202 203 #endif /* !_MACHINE_PCPU_H_ */ 204