master
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
38struct 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_ */