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> |
Paul Gortmaker | 186f436 | 2016-07-13 20:18:56 -0400 | [diff] [blame] | 22 | #include <linux/init.h> |
| 23 | #include <linux/export.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 24 | #include <linux/efi.h> |
| 25 | #include <linux/bcd.h> |
Jeremy Fitzhardinge | ce6234b | 2007-05-02 19:27:15 +0200 | [diff] [blame] | 26 | #include <linux/highmem.h> |
Masami Hiramatsu | 376e242 | 2014-04-17 17:17:05 +0900 | [diff] [blame] | 27 | #include <linux/kprobes.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 28 | |
| 29 | #include <asm/bug.h> |
| 30 | #include <asm/paravirt.h> |
Paul Gortmaker | 50af5ea | 2012-01-20 18:35:53 -0500 | [diff] [blame] | 31 | #include <asm/debugreg.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 32 | #include <asm/desc.h> |
| 33 | #include <asm/setup.h> |
Eduardo Habkost | a312b37 | 2008-07-08 15:06:23 -0700 | [diff] [blame] | 34 | #include <asm/pgtable.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 35 | #include <asm/time.h> |
Jeremy Fitzhardinge | eba0045 | 2008-06-25 00:19:12 -0400 | [diff] [blame] | 36 | #include <asm/pgalloc.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 37 | #include <asm/irq.h> |
| 38 | #include <asm/delay.h> |
Rusty Russell | 13623d7 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 39 | #include <asm/fixmap.h> |
| 40 | #include <asm/apic.h> |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 41 | #include <asm/tlbflush.h> |
Zachary Amsden | 6cb9a83 | 2007-03-05 00:30:35 -0800 | [diff] [blame] | 42 | #include <asm/timer.h> |
David Howells | f05e798 | 2012-03-28 18:11:12 +0100 | [diff] [blame] | 43 | #include <asm/special_insns.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 44 | |
Andy Lutomirski | fc57a7c | 2015-09-20 16:32:04 -0700 | [diff] [blame] | 45 | /* |
| 46 | * nop stub, which must not clobber anything *including the stack* to |
| 47 | * avoid confusing the entry prologues. |
| 48 | */ |
| 49 | extern void _paravirt_nop(void); |
| 50 | asm (".pushsection .entry.text, \"ax\"\n" |
| 51 | ".global _paravirt_nop\n" |
| 52 | "_paravirt_nop:\n\t" |
| 53 | "ret\n\t" |
| 54 | ".size _paravirt_nop, . - _paravirt_nop\n\t" |
| 55 | ".type _paravirt_nop, @function\n\t" |
| 56 | ".popsection"); |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 57 | |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 58 | /* identity function, which can be inlined */ |
| 59 | u32 _paravirt_ident_32(u32 x) |
| 60 | { |
| 61 | return x; |
| 62 | } |
| 63 | |
| 64 | u64 _paravirt_ident_64(u64 x) |
| 65 | { |
| 66 | return x; |
| 67 | } |
| 68 | |
Thomas Gleixner | 6f30c1a | 2009-08-20 13:19:57 +0200 | [diff] [blame] | 69 | void __init default_banner(void) |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 70 | { |
| 71 | printk(KERN_INFO "Booting paravirtualized kernel on %s\n", |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 72 | pv_info.name); |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 73 | } |
| 74 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 75 | /* Undefined instruction for dealing with missing ops pointers. */ |
| 76 | static const unsigned char ud2a[] = { 0x0f, 0x0b }; |
Rusty Russell | 139ec7c | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 77 | |
Andi Kleen | 19d36cc | 2007-07-22 11:12:31 +0200 | [diff] [blame] | 78 | struct branch { |
| 79 | unsigned char opcode; |
| 80 | u32 delta; |
| 81 | } __attribute__((packed)); |
| 82 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 83 | unsigned paravirt_patch_call(void *insnbuf, |
| 84 | const void *target, u16 tgt_clobbers, |
| 85 | unsigned long addr, u16 site_clobbers, |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 86 | unsigned len) |
| 87 | { |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 88 | struct branch *b = insnbuf; |
| 89 | unsigned long delta = (unsigned long)target - (addr+5); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 90 | |
| 91 | if (tgt_clobbers & ~site_clobbers) |
| 92 | return len; /* target would clobber too much for this site */ |
| 93 | if (len < 5) |
| 94 | return len; /* call too long for patch site */ |
| 95 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 96 | b->opcode = 0xe8; /* call */ |
| 97 | b->delta = delta; |
| 98 | BUILD_BUG_ON(sizeof(*b) != 5); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 99 | |
| 100 | return 5; |
| 101 | } |
| 102 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 103 | unsigned paravirt_patch_jmp(void *insnbuf, const void *target, |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 104 | unsigned long addr, unsigned len) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 105 | { |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 106 | struct branch *b = insnbuf; |
| 107 | unsigned long delta = (unsigned long)target - (addr+5); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 108 | |
| 109 | if (len < 5) |
| 110 | return len; /* call too long for patch site */ |
| 111 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 112 | b->opcode = 0xe9; /* jmp */ |
| 113 | b->delta = delta; |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 114 | |
| 115 | return 5; |
| 116 | } |
| 117 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 118 | /* Neat trick to map patch type back to the call within the |
| 119 | * corresponding structure. */ |
| 120 | static void *get_call_destination(u8 type) |
| 121 | { |
| 122 | struct paravirt_patch_template tmpl = { |
| 123 | .pv_init_ops = pv_init_ops, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 124 | .pv_time_ops = pv_time_ops, |
| 125 | .pv_cpu_ops = pv_cpu_ops, |
| 126 | .pv_irq_ops = pv_irq_ops, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 127 | .pv_mmu_ops = pv_mmu_ops, |
Jeremy Fitzhardinge | b4ecc12 | 2009-05-13 17:16:55 -0700 | [diff] [blame] | 128 | #ifdef CONFIG_PARAVIRT_SPINLOCKS |
Jeremy Fitzhardinge | 74d4aff | 2008-07-07 12:07:50 -0700 | [diff] [blame] | 129 | .pv_lock_ops = pv_lock_ops, |
Jeremy Fitzhardinge | b4ecc12 | 2009-05-13 17:16:55 -0700 | [diff] [blame] | 130 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 131 | }; |
| 132 | return *((void **)&tmpl + type); |
| 133 | } |
| 134 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 135 | unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf, |
| 136 | unsigned long addr, unsigned len) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 137 | { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 138 | void *opfunc = get_call_destination(type); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 139 | unsigned ret; |
| 140 | |
| 141 | if (opfunc == NULL) |
| 142 | /* If there's no function, patch it with a ud2a (BUG) */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 143 | ret = paravirt_patch_insns(insnbuf, len, ud2a, ud2a+sizeof(ud2a)); |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 144 | else if (opfunc == _paravirt_nop) |
Borislav Petkov | 79f1d83 | 2015-11-03 10:18:49 +0100 | [diff] [blame] | 145 | ret = 0; |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 146 | |
| 147 | /* identity functions just return their single argument */ |
| 148 | else if (opfunc == _paravirt_ident_32) |
| 149 | ret = paravirt_patch_ident_32(insnbuf, len); |
| 150 | else if (opfunc == _paravirt_ident_64) |
| 151 | ret = paravirt_patch_ident_64(insnbuf, len); |
| 152 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 153 | else if (type == PARAVIRT_PATCH(pv_cpu_ops.iret) || |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 154 | type == PARAVIRT_PATCH(pv_cpu_ops.usergs_sysret64)) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 155 | /* If operation requires a jmp, then jmp */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 156 | ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 157 | else |
| 158 | /* Otherwise call the function; assume target could |
| 159 | clobber any caller-save reg */ |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 160 | ret = paravirt_patch_call(insnbuf, opfunc, CLBR_ANY, |
| 161 | addr, clobbers, len); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 162 | |
| 163 | return ret; |
| 164 | } |
| 165 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 166 | unsigned paravirt_patch_insns(void *insnbuf, unsigned len, |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 167 | const char *start, const char *end) |
| 168 | { |
| 169 | unsigned insn_len = end - start; |
| 170 | |
| 171 | if (insn_len > len || start == NULL) |
| 172 | insn_len = len; |
| 173 | else |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 174 | memcpy(insnbuf, start, insn_len); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 175 | |
Rusty Russell | 139ec7c | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 176 | return insn_len; |
| 177 | } |
| 178 | |
Andi Kleen | 1a1eecd | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 179 | static void native_flush_tlb(void) |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 180 | { |
| 181 | __native_flush_tlb(); |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * Global pages have to be flushed a bit differently. Not a real |
| 186 | * performance problem because this does not happen often. |
| 187 | */ |
Andi Kleen | 1a1eecd | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 188 | static void native_flush_tlb_global(void) |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 189 | { |
| 190 | __native_flush_tlb_global(); |
| 191 | } |
| 192 | |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 193 | static void native_flush_tlb_single(unsigned long addr) |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 194 | { |
| 195 | __native_flush_tlb_single(addr); |
| 196 | } |
| 197 | |
Ingo Molnar | c5905af | 2012-02-24 08:31:31 +0100 | [diff] [blame] | 198 | struct static_key paravirt_steal_enabled; |
| 199 | struct static_key paravirt_steal_rq_enabled; |
Glauber Costa | 3c404b5 | 2011-07-11 15:28:15 -0400 | [diff] [blame] | 200 | |
| 201 | static u64 native_steal_clock(int cpu) |
| 202 | { |
| 203 | return 0; |
| 204 | } |
| 205 | |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 206 | /* These are in entry.S */ |
Andi Kleen | 1a1eecd | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 207 | extern void native_iret(void); |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 208 | extern void native_usergs_sysret64(void); |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 209 | |
Jeremy Fitzhardinge | d572929 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 210 | static struct resource reserve_ioports = { |
| 211 | .start = 0, |
| 212 | .end = IO_SPACE_LIMIT, |
| 213 | .name = "paravirt-ioport", |
| 214 | .flags = IORESOURCE_IO | IORESOURCE_BUSY, |
| 215 | }; |
| 216 | |
Jeremy Fitzhardinge | d572929 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 217 | /* |
| 218 | * Reserve the whole legacy IO space to prevent any legacy drivers |
| 219 | * from wasting time probing for their hardware. This is a fairly |
| 220 | * brute-force approach to disabling all non-virtual drivers. |
| 221 | * |
| 222 | * Note that this must be called very early to have any effect. |
| 223 | */ |
| 224 | int paravirt_disable_iospace(void) |
| 225 | { |
Jeremy Fitzhardinge | f7743fe | 2008-03-27 17:28:40 -0700 | [diff] [blame] | 226 | return request_resource(&ioport_resource, &reserve_ioports); |
Jeremy Fitzhardinge | d572929 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 227 | } |
| 228 | |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 229 | static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; |
| 230 | |
| 231 | static inline void enter_lazy(enum paravirt_lazy_mode mode) |
| 232 | { |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 233 | BUG_ON(this_cpu_read(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 234 | |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 235 | this_cpu_write(paravirt_lazy_mode, mode); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 236 | } |
| 237 | |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 238 | static void leave_lazy(enum paravirt_lazy_mode mode) |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 239 | { |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 240 | BUG_ON(this_cpu_read(paravirt_lazy_mode) != mode); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 241 | |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 242 | this_cpu_write(paravirt_lazy_mode, PARAVIRT_LAZY_NONE); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | void paravirt_enter_lazy_mmu(void) |
| 246 | { |
| 247 | enter_lazy(PARAVIRT_LAZY_MMU); |
| 248 | } |
| 249 | |
| 250 | void paravirt_leave_lazy_mmu(void) |
| 251 | { |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 252 | leave_lazy(PARAVIRT_LAZY_MMU); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 253 | } |
| 254 | |
Boris Ostrovsky | 511ba86 | 2013-03-23 09:36:36 -0400 | [diff] [blame] | 255 | void paravirt_flush_lazy_mmu(void) |
| 256 | { |
| 257 | preempt_disable(); |
| 258 | |
| 259 | if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) { |
| 260 | arch_leave_lazy_mmu_mode(); |
| 261 | arch_enter_lazy_mmu_mode(); |
| 262 | } |
| 263 | |
| 264 | preempt_enable(); |
| 265 | } |
| 266 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 267 | void paravirt_start_context_switch(struct task_struct *prev) |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 268 | { |
Jeremy Fitzhardinge | 2829b44 | 2009-02-17 23:53:19 -0800 | [diff] [blame] | 269 | BUG_ON(preemptible()); |
| 270 | |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 271 | if (this_cpu_read(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU) { |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 272 | arch_leave_lazy_mmu_mode(); |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 273 | set_ti_thread_flag(task_thread_info(prev), TIF_LAZY_MMU_UPDATES); |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 274 | } |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 275 | enter_lazy(PARAVIRT_LAZY_CPU); |
| 276 | } |
| 277 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 278 | void paravirt_end_context_switch(struct task_struct *next) |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 279 | { |
Jeremy Fitzhardinge | 2829b44 | 2009-02-17 23:53:19 -0800 | [diff] [blame] | 280 | BUG_ON(preemptible()); |
| 281 | |
Jeremy Fitzhardinge | b407fc5 | 2009-02-17 23:46:21 -0800 | [diff] [blame] | 282 | leave_lazy(PARAVIRT_LAZY_CPU); |
| 283 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 284 | 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] | 285 | arch_enter_lazy_mmu_mode(); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 286 | } |
| 287 | |
| 288 | enum paravirt_lazy_mode paravirt_get_lazy_mode(void) |
| 289 | { |
Jeremy Fitzhardinge | b8bcfe9 | 2009-02-17 23:05:19 -0800 | [diff] [blame] | 290 | if (in_interrupt()) |
| 291 | return PARAVIRT_LAZY_NONE; |
| 292 | |
Alex Shi | c6ae41e | 2012-05-11 15:35:27 +0800 | [diff] [blame] | 293 | return this_cpu_read(paravirt_lazy_mode); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 294 | } |
| 295 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 296 | struct pv_info pv_info = { |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 297 | .name = "bare hardware", |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 298 | .kernel_rpl = 0, |
Jeremy Fitzhardinge | 5311ab6 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 299 | .shared_kernel_pmd = 1, /* Only used when CONFIG_X86_PAE is set */ |
Andy Lutomirski | 318f5a2 | 2011-08-03 09:31:53 -0400 | [diff] [blame] | 300 | |
| 301 | #ifdef CONFIG_X86_64 |
| 302 | .extra_user_64bit_cs = __USER_CS, |
| 303 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 304 | }; |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 305 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 306 | struct pv_init_ops pv_init_ops = { |
| 307 | .patch = native_patch, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 308 | }; |
| 309 | |
| 310 | struct pv_time_ops pv_time_ops = { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 311 | .sched_clock = native_sched_clock, |
Glauber Costa | 3c404b5 | 2011-07-11 15:28:15 -0400 | [diff] [blame] | 312 | .steal_clock = native_steal_clock, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 313 | }; |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 314 | |
Andi Kleen | 9a55fdb | 2013-08-05 15:02:46 -0700 | [diff] [blame] | 315 | __visible struct pv_irq_ops pv_irq_ops = { |
Jeremy Fitzhardinge | ecb93d1 | 2009-01-28 14:35:05 -0800 | [diff] [blame] | 316 | .save_fl = __PV_IS_CALLEE_SAVE(native_save_fl), |
| 317 | .restore_fl = __PV_IS_CALLEE_SAVE(native_restore_fl), |
| 318 | .irq_disable = __PV_IS_CALLEE_SAVE(native_irq_disable), |
| 319 | .irq_enable = __PV_IS_CALLEE_SAVE(native_irq_enable), |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 320 | .safe_halt = native_safe_halt, |
| 321 | .halt = native_halt, |
Jeremy Fitzhardinge | fab5842 | 2008-06-25 00:19:31 -0400 | [diff] [blame] | 322 | #ifdef CONFIG_X86_64 |
| 323 | .adjust_exception_frame = paravirt_nop, |
| 324 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 325 | }; |
| 326 | |
Andi Kleen | 9a55fdb | 2013-08-05 15:02:46 -0700 | [diff] [blame] | 327 | __visible struct pv_cpu_ops pv_cpu_ops = { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 328 | .cpuid = native_cpuid, |
| 329 | .get_debugreg = native_get_debugreg, |
| 330 | .set_debugreg = native_set_debugreg, |
| 331 | .clts = native_clts, |
| 332 | .read_cr0 = native_read_cr0, |
| 333 | .write_cr0 = native_write_cr0, |
| 334 | .read_cr4 = native_read_cr4, |
| 335 | .read_cr4_safe = native_read_cr4_safe, |
| 336 | .write_cr4 = native_write_cr4, |
Glauber de Oliveira Costa | 88b4755 | 2008-01-30 13:33:19 +0100 | [diff] [blame] | 337 | #ifdef CONFIG_X86_64 |
| 338 | .read_cr8 = native_read_cr8, |
| 339 | .write_cr8 = native_write_cr8, |
| 340 | #endif |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 341 | .wbinvd = native_wbinvd, |
Andy Lutomirski | dd2f4a0 | 2016-04-02 07:01:38 -0700 | [diff] [blame] | 342 | .read_msr = native_read_msr, |
| 343 | .write_msr = native_write_msr, |
Andy Lutomirski | c2ee03b | 2016-04-02 07:01:36 -0700 | [diff] [blame] | 344 | .read_msr_safe = native_read_msr_safe, |
| 345 | .write_msr_safe = native_write_msr_safe, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 346 | .read_pmc = native_read_pmc, |
| 347 | .load_tr_desc = native_load_tr_desc, |
| 348 | .set_ldt = native_set_ldt, |
| 349 | .load_gdt = native_load_gdt, |
| 350 | .load_idt = native_load_idt, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 351 | .store_idt = native_store_idt, |
| 352 | .store_tr = native_store_tr, |
| 353 | .load_tls = native_load_tls, |
Jeremy Fitzhardinge | 9f9d489 | 2008-06-25 00:19:32 -0400 | [diff] [blame] | 354 | #ifdef CONFIG_X86_64 |
| 355 | .load_gs_index = native_load_gs_index, |
| 356 | #endif |
Glauber de Oliveira Costa | 75b8bb3 | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 357 | .write_ldt_entry = native_write_ldt_entry, |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 358 | .write_gdt_entry = native_write_gdt_entry, |
Glauber de Oliveira Costa | 8d94734 | 2008-01-30 13:31:12 +0100 | [diff] [blame] | 359 | .write_idt_entry = native_write_idt_entry, |
Jeremy Fitzhardinge | 38ffbe6 | 2008-07-23 14:21:18 -0700 | [diff] [blame] | 360 | |
| 361 | .alloc_ldt = paravirt_nop, |
| 362 | .free_ldt = paravirt_nop, |
| 363 | |
H. Peter Anvin | faca622 | 2008-01-30 13:31:02 +0100 | [diff] [blame] | 364 | .load_sp0 = native_load_sp0, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 365 | |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 366 | #ifdef CONFIG_X86_64 |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 367 | .usergs_sysret64 = native_usergs_sysret64, |
Jeremy Fitzhardinge | d75cd22f | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 368 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 369 | .iret = native_iret, |
Glauber de Oliveira Costa | e801f86 | 2008-01-30 13:32:08 +0100 | [diff] [blame] | 370 | .swapgs = native_swapgs, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 371 | |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 372 | .set_iopl_mask = native_set_iopl_mask, |
| 373 | .io_delay = native_io_delay, |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 374 | |
Jeremy Fitzhardinge | 224101e | 2009-02-18 11:18:57 -0800 | [diff] [blame] | 375 | .start_context_switch = paravirt_nop, |
| 376 | .end_context_switch = paravirt_nop, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 377 | }; |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 378 | |
Masami Hiramatsu | 8027197 | 2014-04-17 17:17:19 +0900 | [diff] [blame] | 379 | /* At this point, native_get/set_debugreg has real function entries */ |
Masami Hiramatsu | 376e242 | 2014-04-17 17:17:05 +0900 | [diff] [blame] | 380 | NOKPROBE_SYMBOL(native_get_debugreg); |
Masami Hiramatsu | 8027197 | 2014-04-17 17:17:19 +0900 | [diff] [blame] | 381 | NOKPROBE_SYMBOL(native_set_debugreg); |
| 382 | NOKPROBE_SYMBOL(native_load_idt); |
Masami Hiramatsu | 376e242 | 2014-04-17 17:17:05 +0900 | [diff] [blame] | 383 | |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 384 | #if defined(CONFIG_X86_32) && !defined(CONFIG_X86_PAE) |
| 385 | /* 32-bit pagetable entries */ |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 386 | #define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_32) |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 387 | #else |
| 388 | /* 64-bit pagetable entries */ |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 389 | #define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_64) |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 390 | #endif |
| 391 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 392 | struct pv_mmu_ops pv_mmu_ops = { |
Jeremy Fitzhardinge | b239fb2 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 393 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 394 | .read_cr2 = native_read_cr2, |
| 395 | .write_cr2 = native_write_cr2, |
| 396 | .read_cr3 = native_read_cr3, |
| 397 | .write_cr3 = native_write_cr3, |
| 398 | |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 399 | .flush_tlb_user = native_flush_tlb, |
| 400 | .flush_tlb_kernel = native_flush_tlb_global, |
| 401 | .flush_tlb_single = native_flush_tlb_single, |
Jeremy Fitzhardinge | d4c1047 | 2007-05-02 19:27:15 +0200 | [diff] [blame] | 402 | .flush_tlb_others = native_flush_tlb_others, |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 403 | |
Jeremy Fitzhardinge | eba0045 | 2008-06-25 00:19:12 -0400 | [diff] [blame] | 404 | .pgd_alloc = __paravirt_pgd_alloc, |
| 405 | .pgd_free = paravirt_nop, |
| 406 | |
Jeremy Fitzhardinge | 6944a9c | 2008-03-17 16:37:01 -0700 | [diff] [blame] | 407 | .alloc_pte = paravirt_nop, |
| 408 | .alloc_pmd = paravirt_nop, |
Jeremy Fitzhardinge | 2761fa0 | 2008-03-17 16:37:02 -0700 | [diff] [blame] | 409 | .alloc_pud = paravirt_nop, |
Jeremy Fitzhardinge | 6944a9c | 2008-03-17 16:37:01 -0700 | [diff] [blame] | 410 | .release_pte = paravirt_nop, |
| 411 | .release_pmd = paravirt_nop, |
Jeremy Fitzhardinge | 2761fa0 | 2008-03-17 16:37:02 -0700 | [diff] [blame] | 412 | .release_pud = paravirt_nop, |
Zachary Amsden | c119ecc | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 413 | |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 414 | .set_pte = native_set_pte, |
| 415 | .set_pte_at = native_set_pte_at, |
| 416 | .set_pmd = native_set_pmd, |
Andrea Arcangeli | 331127f | 2011-01-13 15:46:36 -0800 | [diff] [blame] | 417 | .set_pmd_at = native_set_pmd_at, |
Jeremy Fitzhardinge | 4587623 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 418 | .pte_update = paravirt_nop, |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 419 | |
Jeremy Fitzhardinge | 08b882c | 2008-06-16 04:30:01 -0700 | [diff] [blame] | 420 | .ptep_modify_prot_start = __ptep_modify_prot_start, |
| 421 | .ptep_modify_prot_commit = __ptep_modify_prot_commit, |
| 422 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 423 | #if CONFIG_PGTABLE_LEVELS >= 3 |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 424 | #ifdef CONFIG_X86_PAE |
| 425 | .set_pte_atomic = native_set_pte_atomic, |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 426 | .pte_clear = native_pte_clear, |
| 427 | .pmd_clear = native_pmd_clear, |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 428 | #endif |
| 429 | .set_pud = native_set_pud, |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 430 | |
| 431 | .pmd_val = PTE_IDENT, |
| 432 | .make_pmd = PTE_IDENT, |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 433 | |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 434 | #if CONFIG_PGTABLE_LEVELS == 4 |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 435 | .pud_val = PTE_IDENT, |
| 436 | .make_pud = PTE_IDENT, |
| 437 | |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 438 | .set_pgd = native_set_pgd, |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 439 | #endif |
Kirill A. Shutemov | 9823336 | 2015-04-14 15:46:14 -0700 | [diff] [blame] | 440 | #endif /* CONFIG_PGTABLE_LEVELS >= 3 */ |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 441 | |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 442 | .pte_val = PTE_IDENT, |
| 443 | .pgd_val = PTE_IDENT, |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 444 | |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 445 | .make_pte = PTE_IDENT, |
| 446 | .make_pgd = PTE_IDENT, |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 447 | |
Jeremy Fitzhardinge | d6dd61c | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 448 | .dup_mmap = paravirt_nop, |
| 449 | .exit_mmap = paravirt_nop, |
| 450 | .activate_mm = paravirt_nop, |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 451 | |
| 452 | .lazy_mode = { |
| 453 | .enter = paravirt_nop, |
| 454 | .leave = paravirt_nop, |
Boris Ostrovsky | 511ba86 | 2013-03-23 09:36:36 -0400 | [diff] [blame] | 455 | .flush = paravirt_nop, |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 456 | }, |
Jeremy Fitzhardinge | aeaaa59 | 2008-06-17 11:42:01 -0700 | [diff] [blame] | 457 | |
| 458 | .set_fixmap = native_set_fixmap, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 459 | }; |
Ingo Molnar | 0dbe5a1 | 2007-01-22 20:40:36 -0800 | [diff] [blame] | 460 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 461 | EXPORT_SYMBOL_GPL(pv_time_ops); |
Jeremy Fitzhardinge | f97b895 | 2007-11-28 16:22:11 -0800 | [diff] [blame] | 462 | EXPORT_SYMBOL (pv_cpu_ops); |
| 463 | EXPORT_SYMBOL (pv_mmu_ops); |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 464 | EXPORT_SYMBOL_GPL(pv_info); |
| 465 | EXPORT_SYMBOL (pv_irq_ops); |