Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 1 | /* Paravirtualization interfaces |
| 2 | Copyright (C) 2006 Rusty Russell IBM Corporation |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation; either version 2 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program; if not, write to the Free Software |
| 16 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
Glauber de Oliveira Costa | b1df07b | 2008-01-30 13:32:04 +0100 | [diff] [blame] | 17 | |
| 18 | 2007 - x86_64 support added by Glauber de Oliveira Costa, Red Hat Inc |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 19 | */ |
Glauber de Oliveira Costa | b1df07b | 2008-01-30 13:32:04 +0100 | [diff] [blame] | 20 | |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 21 | #include <linux/errno.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/efi.h> |
| 24 | #include <linux/bcd.h> |
Jeremy Fitzhardinge | ce6234b | 2007-05-02 19:27:15 +0200 | [diff] [blame] | 25 | #include <linux/highmem.h> |
Masami Hiramatsu | 376e242 | 2014-04-17 17:17:05 +0900 | [diff] [blame] | 26 | #include <linux/kprobes.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 27 | |
| 28 | #include <asm/bug.h> |
| 29 | #include <asm/paravirt.h> |
Paul Gortmaker | 50af5ea | 2012-01-20 18:35:53 -0500 | [diff] [blame] | 30 | #include <asm/debugreg.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 31 | #include <asm/desc.h> |
| 32 | #include <asm/setup.h> |
Eduardo Habkost | a312b37 | 2008-07-08 15:06:23 -0700 | [diff] [blame] | 33 | #include <asm/pgtable.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 34 | #include <asm/time.h> |
Jeremy Fitzhardinge | eba0045 | 2008-06-25 00:19:12 -0400 | [diff] [blame] | 35 | #include <asm/pgalloc.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 36 | #include <asm/irq.h> |
| 37 | #include <asm/delay.h> |
Rusty Russell | 13623d7 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 38 | #include <asm/fixmap.h> |
| 39 | #include <asm/apic.h> |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 40 | #include <asm/tlbflush.h> |
Zachary Amsden | 6cb9a83 | 2007-03-05 00:30:35 -0800 | [diff] [blame] | 41 | #include <asm/timer.h> |
David Howells | f05e798 | 2012-03-28 18:11:12 +0100 | [diff] [blame] | 42 | #include <asm/special_insns.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 43 | |
| 44 | /* nop stub */ |
Jeremy Fitzhardinge | 4587623 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 45 | void _paravirt_nop(void) |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 46 | { |
| 47 | } |
| 48 | |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 49 | /* identity function, which can be inlined */ |
| 50 | u32 _paravirt_ident_32(u32 x) |
| 51 | { |
| 52 | return x; |
| 53 | } |
| 54 | |
| 55 | u64 _paravirt_ident_64(u64 x) |
| 56 | { |
| 57 | return x; |
| 58 | } |
| 59 | |
Thomas Gleixner | 6f30c1a | 2009-08-20 13:19:57 +0200 | [diff] [blame] | 60 | void __init default_banner(void) |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 61 | { |
| 62 | printk(KERN_INFO "Booting paravirtualized kernel on %s\n", |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 63 | pv_info.name); |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 64 | } |
| 65 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 66 | /* Undefined instruction for dealing with missing ops pointers. */ |
| 67 | static const unsigned char ud2a[] = { 0x0f, 0x0b }; |
Rusty Russell | 139ec7c | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 68 | |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 69 | unsigned paravirt_patch_nop(void) |
| 70 | { |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | unsigned paravirt_patch_ignore(unsigned len) |
| 75 | { |
| 76 | return len; |
| 77 | } |
| 78 | |
Andi Kleen | 19d36cc | 2007-07-22 11:12:31 +0200 | [diff] [blame] | 79 | struct branch { |
| 80 | unsigned char opcode; |
| 81 | u32 delta; |
| 82 | } __attribute__((packed)); |
| 83 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 84 | unsigned paravirt_patch_call(void *insnbuf, |
| 85 | const void *target, u16 tgt_clobbers, |
| 86 | unsigned long addr, u16 site_clobbers, |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 87 | unsigned len) |
| 88 | { |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 89 | struct branch *b = insnbuf; |
| 90 | unsigned long delta = (unsigned long)target - (addr+5); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 91 | |
| 92 | if (tgt_clobbers & ~site_clobbers) |
| 93 | return len; /* target would clobber too much for this site */ |
| 94 | if (len < 5) |
| 95 | return len; /* call too long for patch site */ |
| 96 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 97 | b->opcode = 0xe8; /* call */ |
| 98 | b->delta = delta; |
| 99 | BUILD_BUG_ON(sizeof(*b) != 5); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 100 | |
| 101 | return 5; |
| 102 | } |
| 103 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 104 | unsigned paravirt_patch_jmp(void *insnbuf, const void *target, |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 105 | unsigned long addr, unsigned len) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 106 | { |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 107 | struct branch *b = insnbuf; |
| 108 | unsigned long delta = (unsigned long)target - (addr+5); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 109 | |
| 110 | if (len < 5) |
| 111 | return len; /* call too long for patch site */ |
| 112 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 113 | b->opcode = 0xe9; /* jmp */ |
| 114 | b->delta = delta; |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 115 | |
| 116 | return 5; |
| 117 | } |
| 118 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 119 | /* Neat trick to map patch type back to the call within the |
| 120 | * corresponding structure. */ |
| 121 | static void *get_call_destination(u8 type) |
| 122 | { |
| 123 | struct paravirt_patch_template tmpl = { |
| 124 | .pv_init_ops = pv_init_ops, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 125 | .pv_time_ops = pv_time_ops, |
| 126 | .pv_cpu_ops = pv_cpu_ops, |
| 127 | .pv_irq_ops = pv_irq_ops, |
| 128 | .pv_apic_ops = pv_apic_ops, |
| 129 | .pv_mmu_ops = pv_mmu_ops, |
Jeremy Fitzhardinge | b4ecc12 | 2009-05-13 17:16:55 -0700 | [diff] [blame] | 130 | #ifdef CONFIG_PARAVIRT_SPINLOCKS |
Jeremy Fitzhardinge | 74d4aff | 2008-07-07 12:07:50 -0700 | [diff] [blame] | 131 | .pv_lock_ops = pv_lock_ops, |
Jeremy Fitzhardinge | b4ecc12 | 2009-05-13 17:16:55 -0700 | [diff] [blame] | 132 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 133 | }; |
| 134 | return *((void **)&tmpl + type); |
| 135 | } |
| 136 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 137 | unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf, |
| 138 | unsigned long addr, unsigned len) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 139 | { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 140 | void *opfunc = get_call_destination(type); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 141 | unsigned ret; |
| 142 | |
| 143 | if (opfunc == NULL) |
| 144 | /* If there's no function, patch it with a ud2a (BUG) */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 145 | ret = paravirt_patch_insns(insnbuf, len, ud2a, ud2a+sizeof(ud2a)); |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 146 | else if (opfunc == _paravirt_nop) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 147 | /* If the operation is a nop, then nop the callsite */ |
| 148 | ret = paravirt_patch_nop(); |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 149 | |
| 150 | /* identity functions just return their single argument */ |
| 151 | else if (opfunc == _paravirt_ident_32) |
| 152 | ret = paravirt_patch_ident_32(insnbuf, len); |
| 153 | else if (opfunc == _paravirt_ident_64) |
| 154 | ret = paravirt_patch_ident_64(insnbuf, len); |
| 155 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 156 | else if (type == PARAVIRT_PATCH(pv_cpu_ops.iret) || |
Andy Lutomirski | aac82d3 | 2015-04-03 15:51:54 -0700 | [diff] [blame] | 157 | #ifdef CONFIG_X86_32 |
Jeremy Fitzhardinge | d75cd22 | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 158 | type == PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit) || |
Andy Lutomirski | aac82d3 | 2015-04-03 15:51:54 -0700 | [diff] [blame] | 159 | #endif |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 160 | type == PARAVIRT_PATCH(pv_cpu_ops.usergs_sysret32) || |
| 161 | type == PARAVIRT_PATCH(pv_cpu_ops.usergs_sysret64)) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 162 | /* If operation requires a jmp, then jmp */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 163 | ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 164 | else |
| 165 | /* Otherwise call the function; assume target could |
| 166 | clobber any caller-save reg */ |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 167 | ret = paravirt_patch_call(insnbuf, opfunc, CLBR_ANY, |
| 168 | addr, clobbers, len); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 169 | |
| 170 | return ret; |
| 171 | } |
| 172 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 173 | unsigned paravirt_patch_insns(void *insnbuf, unsigned len, |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 174 | const char *start, const char *end) |
| 175 | { |
| 176 | unsigned insn_len = end - start; |
| 177 | |
| 178 | if (insn_len > len || start == NULL) |
| 179 | insn_len = len; |
| 180 | else |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 181 | memcpy(insnbuf, start, insn_len); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 182 | |
Rusty Russell | 139ec7c | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 183 | return insn_len; |
| 184 | } |
| 185 | |
Andi Kleen | 1a1eecd | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 186 | static void native_flush_tlb(void) |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 187 | { |
| 188 | __native_flush_tlb(); |
| 189 | } |
| 190 | |
| 191 | /* |
| 192 | * Global pages have to be flushed a bit differently. Not a real |
| 193 | * performance problem because this does not happen often. |
| 194 | */ |
Andi Kleen | 1a1eecd | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 195 | static void native_flush_tlb_global(void) |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 196 | { |
| 197 | __native_flush_tlb_global(); |
| 198 | } |
| 199 | |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 200 | static void native_flush_tlb_single(unsigned long addr) |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 201 | { |
| 202 | __native_flush_tlb_single(addr); |
| 203 | } |
| 204 | |
Ingo Molnar | c5905af | 2012-02-24 08:31:31 +0100 | [diff] [blame] | 205 | struct static_key paravirt_steal_enabled; |
| 206 | struct static_key paravirt_steal_rq_enabled; |
Glauber Costa | 3c404b5 | 2011-07-11 15:28:15 -0400 | [diff] [blame] | 207 | |
| 208 | static u64 native_steal_clock(int cpu) |
| 209 | { |
| 210 | return 0; |
| 211 | } |
| 212 | |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 213 | /* These are in entry.S */ |
Andi Kleen | 1a1eecd | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 214 | extern void native_iret(void); |
Jeremy Fitzhardinge | d75cd22 | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 215 | extern void native_irq_enable_sysexit(void); |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 216 | extern void native_usergs_sysret32(void); |
| 217 | extern void native_usergs_sysret64(void); |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 218 | |
Jeremy Fitzhardinge | d572929 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 219 | static struct resource reserve_ioports = { |
| 220 | .start = 0, |
| 221 | .end = IO_SPACE_LIMIT, |
| 222 | .name = "paravirt-ioport", |
| 223 | .flags = IORESOURCE_IO | IORESOURCE_BUSY, |
| 224 | }; |
| 225 | |
Jeremy Fitzhardinge | d572929 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 226 | /* |
| 227 | * Reserve the whole legacy IO space to prevent any legacy drivers |
| 228 | * from wasting time probing for their hardware. This is a fairly |
| 229 | * brute-force approach to disabling all non-virtual drivers. |
| 230 | * |
| 231 | * Note that this must be called very early to have any effect. |
| 232 | */ |
| 233 | int paravirt_disable_iospace(void) |
| 234 | { |
Jeremy Fitzhardinge | f7743fe | 2008-03-27 17:28:40 -0700 | [diff] [blame] | 235 | return request_resource(&ioport_resource, &reserve_ioports); |
Jeremy Fitzhardinge | d572929 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 236 | } |
| 237 | |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 238 | static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; |
| 239 | |
| 240 | static inline void enter_lazy(enum paravirt_lazy_mode mode) |
| 241 | { |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 242 | BUG_ON(this_cpu_read(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE); |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 243 | |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 244 | this_cpu_write(paravirt_lazy_mode, mode); |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 245 | } |
| 246 | |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 247 | static void leave_lazy(enum paravirt_lazy_mode mode) |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 248 | { |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 249 | BUG_ON(this_cpu_read(paravirt_lazy_mode) != mode); |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 250 | |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 251 | this_cpu_write(paravirt_lazy_mode, PARAVIRT_LAZY_NONE); |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | void paravirt_enter_lazy_mmu(void) |
| 255 | { |
| 256 | enter_lazy(PARAVIRT_LAZY_MMU); |
| 257 | } |
| 258 | |
| 259 | void paravirt_leave_lazy_mmu(void) |
| 260 | { |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 261 | leave_lazy(PARAVIRT_LAZY_MMU); |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 262 | } |
| 263 | |
Boris Ostrovsky | 511ba86 | 2013-03-23 09:36:36 -0400 | [diff] [blame] | 264 | void paravirt_flush_lazy_mmu(void) |
| 265 | { |
| 266 | preempt_disable(); |
| 267 | |
| 268 | if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) { |
| 269 | arch_leave_lazy_mmu_mode(); |
| 270 | arch_enter_lazy_mmu_mode(); |
| 271 | } |
| 272 | |
| 273 | preempt_enable(); |
| 274 | } |
| 275 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 276 | void paravirt_start_context_switch(struct task_struct *prev) |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 277 | { |
Jeremy Fitzhardinge | 2829b44 | 2009-02-17 23:53:19 -0800 | [diff] [blame] | 278 | BUG_ON(preemptible()); |
| 279 | |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 280 | if (this_cpu_read(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU) { |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 281 | arch_leave_lazy_mmu_mode(); |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 282 | set_ti_thread_flag(task_thread_info(prev), TIF_LAZY_MMU_UPDATES); |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 283 | } |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 284 | enter_lazy(PARAVIRT_LAZY_CPU); |
| 285 | } |
| 286 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 287 | void paravirt_end_context_switch(struct task_struct *next) |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 288 | { |
Jeremy Fitzhardinge | 2829b44 | 2009-02-17 23:53:19 -0800 | [diff] [blame] | 289 | BUG_ON(preemptible()); |
| 290 | |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 291 | leave_lazy(PARAVIRT_LAZY_CPU); |
| 292 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 293 | if (test_and_clear_ti_thread_flag(task_thread_info(next), TIF_LAZY_MMU_UPDATES)) |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 294 | arch_enter_lazy_mmu_mode(); |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | enum paravirt_lazy_mode paravirt_get_lazy_mode(void) |
| 298 | { |
Jeremy Fitzhardinge | b8bcfe9 | 2009-02-17 23:05:19 -0800 | [diff] [blame] | 299 | if (in_interrupt()) |
| 300 | return PARAVIRT_LAZY_NONE; |
| 301 | |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 302 | return this_cpu_read(paravirt_lazy_mode); |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 303 | } |
| 304 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 305 | struct pv_info pv_info = { |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 306 | .name = "bare hardware", |
| 307 | .paravirt_enabled = 0, |
| 308 | .kernel_rpl = 0, |
Jeremy Fitzhardinge | 5311ab6 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 309 | .shared_kernel_pmd = 1, /* Only used when CONFIG_X86_PAE is set */ |
Andy Lutomirski | 318f5a2 | 2011-08-03 09:31:53 -0400 | [diff] [blame] | 310 | |
| 311 | #ifdef CONFIG_X86_64 |
| 312 | .extra_user_64bit_cs = __USER_CS, |
| 313 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 314 | }; |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 315 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 316 | struct pv_init_ops pv_init_ops = { |
| 317 | .patch = native_patch, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 318 | }; |
| 319 | |
| 320 | struct pv_time_ops pv_time_ops = { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 321 | .sched_clock = native_sched_clock, |
Glauber Costa | 3c404b5 | 2011-07-11 15:28:15 -0400 | [diff] [blame] | 322 | .steal_clock = native_steal_clock, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 323 | }; |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 324 | |
Andi Kleen | 9a55fdb | 2013-08-05 15:02:46 -0700 | [diff] [blame] | 325 | __visible struct pv_irq_ops pv_irq_ops = { |
Jeremy Fitzhardinge | ecb93d1 | 2009-01-28 14:35:05 -0800 | [diff] [blame] | 326 | .save_fl = __PV_IS_CALLEE_SAVE(native_save_fl), |
| 327 | .restore_fl = __PV_IS_CALLEE_SAVE(native_restore_fl), |
| 328 | .irq_disable = __PV_IS_CALLEE_SAVE(native_irq_disable), |
| 329 | .irq_enable = __PV_IS_CALLEE_SAVE(native_irq_enable), |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 330 | .safe_halt = native_safe_halt, |
| 331 | .halt = native_halt, |
Jeremy Fitzhardinge | fab5842 | 2008-06-25 00:19:31 -0400 | [diff] [blame] | 332 | #ifdef CONFIG_X86_64 |
| 333 | .adjust_exception_frame = paravirt_nop, |
| 334 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 335 | }; |
| 336 | |
Andi Kleen | 9a55fdb | 2013-08-05 15:02:46 -0700 | [diff] [blame] | 337 | __visible struct pv_cpu_ops pv_cpu_ops = { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 338 | .cpuid = native_cpuid, |
| 339 | .get_debugreg = native_get_debugreg, |
| 340 | .set_debugreg = native_set_debugreg, |
| 341 | .clts = native_clts, |
| 342 | .read_cr0 = native_read_cr0, |
| 343 | .write_cr0 = native_write_cr0, |
| 344 | .read_cr4 = native_read_cr4, |
| 345 | .read_cr4_safe = native_read_cr4_safe, |
| 346 | .write_cr4 = native_write_cr4, |
Glauber de Oliveira Costa | 88b4755 | 2008-01-30 13:33:19 +0100 | [diff] [blame] | 347 | #ifdef CONFIG_X86_64 |
| 348 | .read_cr8 = native_read_cr8, |
| 349 | .write_cr8 = native_write_cr8, |
| 350 | #endif |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 351 | .wbinvd = native_wbinvd, |
Rusty Russell | 90a0a06 | 2007-05-02 19:27:10 +0200 | [diff] [blame] | 352 | .read_msr = native_read_msr_safe, |
| 353 | .write_msr = native_write_msr_safe, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 354 | .read_tsc = native_read_tsc, |
| 355 | .read_pmc = native_read_pmc, |
Glauber de Oliveira Costa | e5aaac4 | 2008-01-30 13:32:05 +0100 | [diff] [blame] | 356 | .read_tscp = native_read_tscp, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 357 | .load_tr_desc = native_load_tr_desc, |
| 358 | .set_ldt = native_set_ldt, |
| 359 | .load_gdt = native_load_gdt, |
| 360 | .load_idt = native_load_idt, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 361 | .store_idt = native_store_idt, |
| 362 | .store_tr = native_store_tr, |
| 363 | .load_tls = native_load_tls, |
Jeremy Fitzhardinge | 9f9d489 | 2008-06-25 00:19:32 -0400 | [diff] [blame] | 364 | #ifdef CONFIG_X86_64 |
| 365 | .load_gs_index = native_load_gs_index, |
| 366 | #endif |
Glauber de Oliveira Costa | 75b8bb3 | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 367 | .write_ldt_entry = native_write_ldt_entry, |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 368 | .write_gdt_entry = native_write_gdt_entry, |
Glauber de Oliveira Costa | 8d94734 | 2008-01-30 13:31:12 +0100 | [diff] [blame] | 369 | .write_idt_entry = native_write_idt_entry, |
Jeremy Fitzhardinge | 38ffbe6 | 2008-07-23 14:21:18 -0700 | [diff] [blame] | 370 | |
| 371 | .alloc_ldt = paravirt_nop, |
| 372 | .free_ldt = paravirt_nop, |
| 373 | |
H. Peter Anvin | faca622 | 2008-01-30 13:31:02 +0100 | [diff] [blame] | 374 | .load_sp0 = native_load_sp0, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 375 | |
Andy Lutomirski | aac82d3 | 2015-04-03 15:51:54 -0700 | [diff] [blame] | 376 | #if defined(CONFIG_X86_32) |
Jeremy Fitzhardinge | d75cd22 | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 377 | .irq_enable_sysexit = native_irq_enable_sysexit, |
Jeremy Fitzhardinge | 102d0a4 | 2008-06-30 11:10:53 -0700 | [diff] [blame] | 378 | #endif |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 379 | #ifdef CONFIG_X86_64 |
Jeremy Fitzhardinge | 102d0a4 | 2008-06-30 11:10:53 -0700 | [diff] [blame] | 380 | #ifdef CONFIG_IA32_EMULATION |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 381 | .usergs_sysret32 = native_usergs_sysret32, |
Jeremy Fitzhardinge | 102d0a4 | 2008-06-30 11:10:53 -0700 | [diff] [blame] | 382 | #endif |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 383 | .usergs_sysret64 = native_usergs_sysret64, |
Jeremy Fitzhardinge | d75cd22 | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 384 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 385 | .iret = native_iret, |
Glauber de Oliveira Costa | e801f86 | 2008-01-30 13:32:08 +0100 | [diff] [blame] | 386 | .swapgs = native_swapgs, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 387 | |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 388 | .set_iopl_mask = native_set_iopl_mask, |
| 389 | .io_delay = native_io_delay, |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 390 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 391 | .start_context_switch = paravirt_nop, |
| 392 | .end_context_switch = paravirt_nop, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 393 | }; |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 394 | |
Masami Hiramatsu | 8027197 | 2014-04-17 17:17:19 +0900 | [diff] [blame] | 395 | /* At this point, native_get/set_debugreg has real function entries */ |
Masami Hiramatsu | 376e242 | 2014-04-17 17:17:05 +0900 | [diff] [blame] | 396 | NOKPROBE_SYMBOL(native_get_debugreg); |
Masami Hiramatsu | 8027197 | 2014-04-17 17:17:19 +0900 | [diff] [blame] | 397 | NOKPROBE_SYMBOL(native_set_debugreg); |
| 398 | NOKPROBE_SYMBOL(native_load_idt); |
Masami Hiramatsu | 376e242 | 2014-04-17 17:17:05 +0900 | [diff] [blame] | 399 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 400 | struct pv_apic_ops pv_apic_ops = { |
Rusty Russell | 13623d7 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 401 | #ifdef CONFIG_X86_LOCAL_APIC |
Jeremy Fitzhardinge | 0260c19 | 2007-05-02 19:27:18 +0200 | [diff] [blame] | 402 | .startup_ipi_hook = paravirt_nop, |
Rusty Russell | 13623d7 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 403 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 404 | }; |
Rusty Russell | 13623d7 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 405 | |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 406 | #if defined(CONFIG_X86_32) && !defined(CONFIG_X86_PAE) |
| 407 | /* 32-bit pagetable entries */ |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 408 | #define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_32) |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 409 | #else |
| 410 | /* 64-bit pagetable entries */ |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 411 | #define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_64) |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 412 | #endif |
| 413 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 414 | struct pv_mmu_ops pv_mmu_ops = { |
Jeremy Fitzhardinge | b239fb2 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 415 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 416 | .read_cr2 = native_read_cr2, |
| 417 | .write_cr2 = native_write_cr2, |
| 418 | .read_cr3 = native_read_cr3, |
| 419 | .write_cr3 = native_write_cr3, |
| 420 | |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 421 | .flush_tlb_user = native_flush_tlb, |
| 422 | .flush_tlb_kernel = native_flush_tlb_global, |
| 423 | .flush_tlb_single = native_flush_tlb_single, |
Jeremy Fitzhardinge | d4c1047 | 2007-05-02 19:27:15 +0200 | [diff] [blame] | 424 | .flush_tlb_others = native_flush_tlb_others, |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 425 | |
Jeremy Fitzhardinge | eba0045 | 2008-06-25 00:19:12 -0400 | [diff] [blame] | 426 | .pgd_alloc = __paravirt_pgd_alloc, |
| 427 | .pgd_free = paravirt_nop, |
| 428 | |
Jeremy Fitzhardinge | 6944a9c | 2008-03-17 16:37:01 -0700 | [diff] [blame] | 429 | .alloc_pte = paravirt_nop, |
| 430 | .alloc_pmd = paravirt_nop, |
Jeremy Fitzhardinge | 2761fa0 | 2008-03-17 16:37:02 -0700 | [diff] [blame] | 431 | .alloc_pud = paravirt_nop, |
Jeremy Fitzhardinge | 6944a9c | 2008-03-17 16:37:01 -0700 | [diff] [blame] | 432 | .release_pte = paravirt_nop, |
| 433 | .release_pmd = paravirt_nop, |
Jeremy Fitzhardinge | 2761fa0 | 2008-03-17 16:37:02 -0700 | [diff] [blame] | 434 | .release_pud = paravirt_nop, |
Zachary Amsden | c119ecc | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 435 | |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 436 | .set_pte = native_set_pte, |
| 437 | .set_pte_at = native_set_pte_at, |
| 438 | .set_pmd = native_set_pmd, |
Andrea Arcangeli | 331127f | 2011-01-13 15:46:36 -0800 | [diff] [blame] | 439 | .set_pmd_at = native_set_pmd_at, |
Jeremy Fitzhardinge | 4587623 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 440 | .pte_update = paravirt_nop, |
| 441 | .pte_update_defer = paravirt_nop, |
Andrea Arcangeli | 331127f | 2011-01-13 15:46:36 -0800 | [diff] [blame] | 442 | .pmd_update = paravirt_nop, |
| 443 | .pmd_update_defer = paravirt_nop, |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 444 | |
Jeremy Fitzhardinge | 08b882c | 2008-06-16 04:30:01 -0700 | [diff] [blame] | 445 | .ptep_modify_prot_start = __ptep_modify_prot_start, |
| 446 | .ptep_modify_prot_commit = __ptep_modify_prot_commit, |
| 447 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 448 | #if CONFIG_PGTABLE_LEVELS >= 3 |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 449 | #ifdef CONFIG_X86_PAE |
| 450 | .set_pte_atomic = native_set_pte_atomic, |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 451 | .pte_clear = native_pte_clear, |
| 452 | .pmd_clear = native_pmd_clear, |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 453 | #endif |
| 454 | .set_pud = native_set_pud, |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 455 | |
| 456 | .pmd_val = PTE_IDENT, |
| 457 | .make_pmd = PTE_IDENT, |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 458 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 459 | #if CONFIG_PGTABLE_LEVELS == 4 |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 460 | .pud_val = PTE_IDENT, |
| 461 | .make_pud = PTE_IDENT, |
| 462 | |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 463 | .set_pgd = native_set_pgd, |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 464 | #endif |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 465 | #endif /* CONFIG_PGTABLE_LEVELS >= 3 */ |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 466 | |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 467 | .pte_val = PTE_IDENT, |
| 468 | .pgd_val = PTE_IDENT, |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 469 | |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 470 | .make_pte = PTE_IDENT, |
| 471 | .make_pgd = PTE_IDENT, |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 472 | |
Jeremy Fitzhardinge | d6dd61c | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 473 | .dup_mmap = paravirt_nop, |
| 474 | .exit_mmap = paravirt_nop, |
| 475 | .activate_mm = paravirt_nop, |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 476 | |
| 477 | .lazy_mode = { |
| 478 | .enter = paravirt_nop, |
| 479 | .leave = paravirt_nop, |
Boris Ostrovsky | 511ba86 | 2013-03-23 09:36:36 -0400 | [diff] [blame] | 480 | .flush = paravirt_nop, |
Jeremy Fitzhardinge | 8965c1c0 | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 481 | }, |
Jeremy Fitzhardinge | aeaaa59 | 2008-06-17 11:42:01 -0700 | [diff] [blame] | 482 | |
| 483 | .set_fixmap = native_set_fixmap, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 484 | }; |
Ingo Molnar | 0dbe5a1 | 2007-01-22 20:40:36 -0800 | [diff] [blame] | 485 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 486 | EXPORT_SYMBOL_GPL(pv_time_ops); |
Jeremy Fitzhardinge | f97b895 | 2007-11-28 16:22:11 -0800 | [diff] [blame] | 487 | EXPORT_SYMBOL (pv_cpu_ops); |
| 488 | EXPORT_SYMBOL (pv_mmu_ops); |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 489 | EXPORT_SYMBOL_GPL(pv_apic_ops); |
| 490 | EXPORT_SYMBOL_GPL(pv_info); |
| 491 | EXPORT_SYMBOL (pv_irq_ops); |