1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 /* 26 * Copyright 2019 Joyent, Inc. 27 */ 28 29 #ifndef _SYS_MACHCPUVAR_H 30 #define _SYS_MACHCPUVAR_H 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include <sys/inttypes.h> 37 #include <sys/x_call.h> 38 #include <sys/tss.h> 39 #include <sys/segments.h> 40 #include <sys/rm_platter.h> 41 #include <sys/avintr.h> 42 #include <sys/pte.h> 43 #include <sys/stddef.h> 44 #include <sys/debug.h> 45 #include <sys/cpuvar.h> 46 #include <sys/smt_machcpu.h> 47 48 #ifndef _ASM 49 /* 50 * On a virtualized platform a virtual cpu may not be actually 51 * on a physical cpu, especially in situations where a configuration has 52 * more vcpus than pcpus. This function tells us (if it's able) if the 53 * specified vcpu is currently running on a pcpu. Note if it is not 54 * known or not able to determine, it will return the unknown state. 55 */ 56 #define VCPU_STATE_UNKNOWN 0 57 #define VCPU_ON_PCPU 1 58 #define VCPU_NOT_ON_PCPU 2 59 60 extern int vcpu_on_pcpu(processorid_t); 61 62 /* 63 * Machine specific fields of the cpu struct 64 * defined in common/sys/cpuvar.h. 65 * 66 * Note: This is kinda kludgy but seems to be the best 67 * of our alternatives. 68 */ 69 70 struct cpuid_info; 71 struct cpu_ucode_info; 72 struct cmi_hdl; 73 74 /* 75 * A note about the hypervisor affinity bits: a one bit in the affinity mask 76 * means the corresponding event channel is allowed to be serviced 77 * by this cpu. 78 */ 79 struct xen_evt_data { 80 ulong_t pending_sel[PIL_MAX + 1]; /* event array selectors */ 81 ulong_t pending_evts[PIL_MAX + 1][sizeof (ulong_t) * 8]; 82 ulong_t evt_affinity[sizeof (ulong_t) * 8]; /* service on cpu */ 83 }; 84 85 enum fast_syscall_state { 86 FSS_DISABLED = 0, 87 FSS_ASYSC_ENABLED = (1 << 0), 88 FSS_SEP_ENABLED = (1 << 1) 89 }; 90 91 struct kpti_frame { 92 uint64_t kf_lower_redzone; 93 94 /* Stashed value of %cr3 when we entered the trampoline. */ 95 greg_t kf_tr_cr3; 96 97 /* 98 * We use %r13-r14 as scratch registers in the trampoline code, 99 * so stash those here "below" the rest of the stack so they can be 100 * pushed/popped if needed. 101 */ 102 greg_t kf_r14; 103 greg_t kf_r13; 104 105 /* 106 * Part of this struct is used as the HW stack frame when taking an 107 * interrupt on the user page table. The CPU is going to push a bunch 108 * of regs onto the stack pointer set in the TSS/IDT (which we set to 109 * &kf_rsp here). 110 * 111 * This is only a temporary holding area for them (we'll move them over 112 * to the real interrupt stack once we've set %cr3). 113 * 114 * Note that these must be cleared during a process switch on this cpu. 115 */ 116 greg_t kf_err; /* Bottom of initial hw stack frame */ 117 greg_t kf_rip; 118 greg_t kf_cs; 119 greg_t kf_rflags; 120 greg_t kf_rsp; 121 greg_t kf_ss; 122 123 greg_t kf_tr_rsp; /* Top of HW stack frame */ 124 /* We also write this with the %rsp value on tramp entry */ 125 126 /* Written to 0x1 when this kpti_frame is in use. */ 127 uint64_t kf_tr_flag; 128 129 uint64_t kf_middle_redzone; 130 131 /* 132 * The things we need to write to %cr3 to change between page tables. 133 * These live "above" the HW stack. 134 */ 135 greg_t kf_kernel_cr3; 136 greg_t kf_user_cr3; 137 greg_t kf_tr_ret_rsp; 138 139 uint64_t kf_unused; /* For 16-byte align */ 140 141 uint64_t kf_upper_redzone; 142 }; 143 144 /* 145 * This first value, MACHCPU_SIZE is the size of all the members in the cpu_t 146 * AND struct machcpu, before we get to the mcpu_pad and the kpti area. 147 * The KPTI is used to contain per-CPU data that is visible in both sets of 148 * page-tables, and hence must be page-aligned and page-sized. See 149 * hat_pcp_setup(). 150 * 151 * There are CTASSERTs in os/intr.c that verify this all works out. 152 */ 153 #define MACHCPU_SIZE (1568 + 696) 154 #define MACHCPU_PAD (MMU_PAGESIZE - MACHCPU_SIZE) 155 #define MACHCPU_PAD2 (MMU_PAGESIZE - 16 - 3 * sizeof (struct kpti_frame)) 156 157 struct machcpu { 158 /* 159 * x_call fields - used for interprocessor cross calls 160 */ 161 struct xc_msg *xc_msgbox; 162 struct xc_msg *xc_curmsg; 163 struct xc_msg *xc_free; 164 xc_data_t xc_data; 165 uint32_t xc_wait_cnt; 166 volatile uint32_t xc_work_cnt; 167 168 int mcpu_nodeid; /* node-id */ 169 int mcpu_pri; /* CPU priority */ 170 171 struct hat *mcpu_current_hat; /* cpu's current hat */ 172 173 struct hat_cpu_info *mcpu_hat_info; 174 175 volatile ulong_t mcpu_tlb_info; 176 177 /* i86 hardware table addresses that cannot be shared */ 178 179 user_desc_t *mcpu_gdt; /* GDT */ 180 gate_desc_t *mcpu_idt; /* current IDT */ 181 182 tss_t *mcpu_tss; /* TSS */ 183 void *mcpu_ldt; 184 size_t mcpu_ldt_len; 185 186 kmutex_t mcpu_ppaddr_mutex; 187 caddr_t mcpu_caddr1; /* per cpu CADDR1 */ 188 caddr_t mcpu_caddr2; /* per cpu CADDR2 */ 189 uint64_t mcpu_caddr1pte; 190 uint64_t mcpu_caddr2pte; 191 192 struct softint mcpu_softinfo; 193 uint64_t pil_high_start[HIGH_LEVELS]; 194 uint64_t intrstat[PIL_MAX + 1][2]; 195 196 struct cpuid_info *mcpu_cpi; 197 198 #if defined(__amd64) 199 greg_t mcpu_rtmp_rsp; /* syscall: temporary %rsp stash */ 200 greg_t mcpu_rtmp_r15; /* syscall: temporary %r15 stash */ 201 #endif 202 203 struct vcpu_info *mcpu_vcpu_info; 204 uint64_t mcpu_gdtpa; /* hypervisor: GDT physical address */ 205 206 uint16_t mcpu_intr_pending; /* hypervisor: pending intrpt levels */ 207 uint16_t mcpu_ec_mbox; /* hypervisor: evtchn_dev mailbox */ 208 struct xen_evt_data *mcpu_evt_pend; /* hypervisor: pending events */ 209 210 volatile uint32_t *mcpu_mwait; /* MONITOR/MWAIT buffer */ 211 void (*mcpu_idle_cpu)(void); /* idle function */ 212 uint16_t mcpu_idle_type; /* CPU next idle type */ 213 uint16_t max_cstates; /* supported max cstates */ 214 215 enum fast_syscall_state mcpu_fast_syscall_state; 216 217 struct cpu_ucode_info *mcpu_ucode_info; 218 219 void *mcpu_pm_mach_state; 220 struct cmi_hdl *mcpu_cmi_hdl; 221 void *mcpu_mach_ctx_ptr; 222 223 /* 224 * A stamp that is unique per processor and changes 225 * whenever an interrupt happens. Userful for detecting 226 * if a section of code gets interrupted. 227 * The high order 16 bits will hold the cpu->cpu_id. 228 * The low order bits will be incremented on every interrupt. 229 */ 230 volatile uint32_t mcpu_istamp; 231 232 cpu_smt_t mcpu_smt; 233 234 char mcpu_pad[MACHCPU_PAD]; 235 236 /* This is the start of the page */ 237 char mcpu_pad2[MACHCPU_PAD2]; 238 struct kpti_frame mcpu_kpti; 239 struct kpti_frame mcpu_kpti_flt; 240 struct kpti_frame mcpu_kpti_dbg; 241 char mcpu_pad3[16]; 242 }; 243 244 #define NINTR_THREADS (LOCK_LEVEL-1) /* number of interrupt threads */ 245 #define MWAIT_HALTED (1) /* mcpu_mwait set when halting */ 246 #define MWAIT_RUNNING (0) /* mcpu_mwait set to wakeup */ 247 #define MWAIT_WAKEUP_IPI (2) /* need IPI to wakeup */ 248 #define MWAIT_WAKEUP(cpu) (*((cpu)->cpu_m.mcpu_mwait) = MWAIT_RUNNING) 249 250 #endif /* _ASM */ 251 252 /* Please DON'T add any more of this namespace-poisoning sewage here */ 253 254 #define cpu_nodeid cpu_m.mcpu_nodeid 255 #define cpu_pri cpu_m.mcpu_pri 256 #define cpu_current_hat cpu_m.mcpu_current_hat 257 #define cpu_hat_info cpu_m.mcpu_hat_info 258 #define cpu_ppaddr_mutex cpu_m.mcpu_ppaddr_mutex 259 #define cpu_gdt cpu_m.mcpu_gdt 260 #define cpu_idt cpu_m.mcpu_idt 261 #define cpu_tss cpu_m.mcpu_tss 262 #define cpu_caddr1 cpu_m.mcpu_caddr1 263 #define cpu_caddr2 cpu_m.mcpu_caddr2 264 #define cpu_softinfo cpu_m.mcpu_softinfo 265 #define cpu_caddr1pte cpu_m.mcpu_caddr1pte 266 #define cpu_caddr2pte cpu_m.mcpu_caddr2pte 267 268 #ifdef __cplusplus 269 } 270 #endif 271 272 #endif /* _SYS_MACHCPUVAR_H */ 273