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> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 26 | |
| 27 | #include <asm/bug.h> |
| 28 | #include <asm/paravirt.h> |
| 29 | #include <asm/desc.h> |
| 30 | #include <asm/setup.h> |
Eduardo Habkost | a312b37 | 2008-07-08 15:06:23 -0700 | [diff] [blame] | 31 | #include <asm/pgtable.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 32 | #include <asm/time.h> |
Jeremy Fitzhardinge | eba0045 | 2008-06-25 00:19:12 -0400 | [diff] [blame] | 33 | #include <asm/pgalloc.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 34 | #include <asm/irq.h> |
| 35 | #include <asm/delay.h> |
Rusty Russell | 13623d7 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 36 | #include <asm/fixmap.h> |
| 37 | #include <asm/apic.h> |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 38 | #include <asm/tlbflush.h> |
Zachary Amsden | 6cb9a83 | 2007-03-05 00:30:35 -0800 | [diff] [blame] | 39 | #include <asm/timer.h> |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 40 | |
| 41 | /* nop stub */ |
Jeremy Fitzhardinge | 4587623 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 42 | void _paravirt_nop(void) |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 43 | { |
| 44 | } |
| 45 | |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 46 | /* identity function, which can be inlined */ |
| 47 | u32 _paravirt_ident_32(u32 x) |
| 48 | { |
| 49 | return x; |
| 50 | } |
| 51 | |
| 52 | u64 _paravirt_ident_64(u64 x) |
| 53 | { |
| 54 | return x; |
| 55 | } |
| 56 | |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 57 | static void __init default_banner(void) |
| 58 | { |
| 59 | printk(KERN_INFO "Booting paravirtualized kernel on %s\n", |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 60 | pv_info.name); |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | char *memory_setup(void) |
| 64 | { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 65 | return pv_init_ops.memory_setup(); |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 66 | } |
| 67 | |
Rusty Russell | 139ec7c | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 68 | /* Simple instruction patching code. */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 69 | #define DEF_NATIVE(ops, name, code) \ |
| 70 | extern const char start_##ops##_##name[], end_##ops##_##name[]; \ |
| 71 | asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":") |
Rusty Russell | 139ec7c | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 72 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 73 | /* Undefined instruction for dealing with missing ops pointers. */ |
| 74 | static const unsigned char ud2a[] = { 0x0f, 0x0b }; |
Rusty Russell | 139ec7c | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 75 | |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 76 | unsigned paravirt_patch_nop(void) |
| 77 | { |
| 78 | return 0; |
| 79 | } |
| 80 | |
| 81 | unsigned paravirt_patch_ignore(unsigned len) |
| 82 | { |
| 83 | return len; |
| 84 | } |
| 85 | |
Andi Kleen | 19d36cc | 2007-07-22 11:12:31 +0200 | [diff] [blame] | 86 | struct branch { |
| 87 | unsigned char opcode; |
| 88 | u32 delta; |
| 89 | } __attribute__((packed)); |
| 90 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 91 | unsigned paravirt_patch_call(void *insnbuf, |
| 92 | const void *target, u16 tgt_clobbers, |
| 93 | unsigned long addr, u16 site_clobbers, |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 94 | unsigned len) |
| 95 | { |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 96 | struct branch *b = insnbuf; |
| 97 | unsigned long delta = (unsigned long)target - (addr+5); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 98 | |
| 99 | if (tgt_clobbers & ~site_clobbers) |
| 100 | return len; /* target would clobber too much for this site */ |
| 101 | if (len < 5) |
| 102 | return len; /* call too long for patch site */ |
| 103 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 104 | b->opcode = 0xe8; /* call */ |
| 105 | b->delta = delta; |
| 106 | BUILD_BUG_ON(sizeof(*b) != 5); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 107 | |
| 108 | return 5; |
| 109 | } |
| 110 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 111 | unsigned paravirt_patch_jmp(void *insnbuf, const void *target, |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 112 | unsigned long addr, unsigned len) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 113 | { |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 114 | struct branch *b = insnbuf; |
| 115 | unsigned long delta = (unsigned long)target - (addr+5); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 116 | |
| 117 | if (len < 5) |
| 118 | return len; /* call too long for patch site */ |
| 119 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 120 | b->opcode = 0xe9; /* jmp */ |
| 121 | b->delta = delta; |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 122 | |
| 123 | return 5; |
| 124 | } |
| 125 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 126 | /* Neat trick to map patch type back to the call within the |
| 127 | * corresponding structure. */ |
| 128 | static void *get_call_destination(u8 type) |
| 129 | { |
| 130 | struct paravirt_patch_template tmpl = { |
| 131 | .pv_init_ops = pv_init_ops, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 132 | .pv_time_ops = pv_time_ops, |
| 133 | .pv_cpu_ops = pv_cpu_ops, |
| 134 | .pv_irq_ops = pv_irq_ops, |
| 135 | .pv_apic_ops = pv_apic_ops, |
| 136 | .pv_mmu_ops = pv_mmu_ops, |
Jeremy Fitzhardinge | b4ecc12 | 2009-05-13 17:16:55 -0700 | [diff] [blame^] | 137 | #ifdef CONFIG_PARAVIRT_SPINLOCKS |
Jeremy Fitzhardinge | 74d4aff | 2008-07-07 12:07:50 -0700 | [diff] [blame] | 138 | .pv_lock_ops = pv_lock_ops, |
Jeremy Fitzhardinge | b4ecc12 | 2009-05-13 17:16:55 -0700 | [diff] [blame^] | 139 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 140 | }; |
| 141 | return *((void **)&tmpl + type); |
| 142 | } |
| 143 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 144 | unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf, |
| 145 | unsigned long addr, unsigned len) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 146 | { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 147 | void *opfunc = get_call_destination(type); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 148 | unsigned ret; |
| 149 | |
| 150 | if (opfunc == NULL) |
| 151 | /* If there's no function, patch it with a ud2a (BUG) */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 152 | ret = paravirt_patch_insns(insnbuf, len, ud2a, ud2a+sizeof(ud2a)); |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 153 | else if (opfunc == _paravirt_nop) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 154 | /* If the operation is a nop, then nop the callsite */ |
| 155 | ret = paravirt_patch_nop(); |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 156 | |
| 157 | /* identity functions just return their single argument */ |
| 158 | else if (opfunc == _paravirt_ident_32) |
| 159 | ret = paravirt_patch_ident_32(insnbuf, len); |
| 160 | else if (opfunc == _paravirt_ident_64) |
| 161 | ret = paravirt_patch_ident_64(insnbuf, len); |
| 162 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 163 | else if (type == PARAVIRT_PATCH(pv_cpu_ops.iret) || |
Jeremy Fitzhardinge | d75cd22f | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 164 | type == PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit) || |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 165 | type == PARAVIRT_PATCH(pv_cpu_ops.usergs_sysret32) || |
| 166 | type == PARAVIRT_PATCH(pv_cpu_ops.usergs_sysret64)) |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 167 | /* If operation requires a jmp, then jmp */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 168 | ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 169 | else |
| 170 | /* Otherwise call the function; assume target could |
| 171 | clobber any caller-save reg */ |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 172 | ret = paravirt_patch_call(insnbuf, opfunc, CLBR_ANY, |
| 173 | addr, clobbers, len); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 174 | |
| 175 | return ret; |
| 176 | } |
| 177 | |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 178 | unsigned paravirt_patch_insns(void *insnbuf, unsigned len, |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 179 | const char *start, const char *end) |
| 180 | { |
| 181 | unsigned insn_len = end - start; |
| 182 | |
| 183 | if (insn_len > len || start == NULL) |
| 184 | insn_len = len; |
| 185 | else |
Andi Kleen | ab144f5 | 2007-08-10 22:31:03 +0200 | [diff] [blame] | 186 | memcpy(insnbuf, start, insn_len); |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 187 | |
Rusty Russell | 139ec7c | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 188 | return insn_len; |
| 189 | } |
| 190 | |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 191 | void init_IRQ(void) |
| 192 | { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 193 | pv_irq_ops.init_IRQ(); |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 194 | } |
| 195 | |
Andi Kleen | 1a1eecd | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 196 | static void native_flush_tlb(void) |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 197 | { |
| 198 | __native_flush_tlb(); |
| 199 | } |
| 200 | |
| 201 | /* |
| 202 | * Global pages have to be flushed a bit differently. Not a real |
| 203 | * performance problem because this does not happen often. |
| 204 | */ |
Andi Kleen | 1a1eecd | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 205 | static void native_flush_tlb_global(void) |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 206 | { |
| 207 | __native_flush_tlb_global(); |
| 208 | } |
| 209 | |
Jeremy Fitzhardinge | 63f7027 | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 210 | static void native_flush_tlb_single(unsigned long addr) |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 211 | { |
| 212 | __native_flush_tlb_single(addr); |
| 213 | } |
| 214 | |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 215 | /* These are in entry.S */ |
Andi Kleen | 1a1eecd | 2007-02-13 13:26:25 +0100 | [diff] [blame] | 216 | extern void native_iret(void); |
Jeremy Fitzhardinge | d75cd22f | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 217 | extern void native_irq_enable_sysexit(void); |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 218 | extern void native_usergs_sysret32(void); |
| 219 | extern void native_usergs_sysret64(void); |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 220 | |
| 221 | static int __init print_banner(void) |
| 222 | { |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 223 | pv_init_ops.banner(); |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 224 | return 0; |
| 225 | } |
| 226 | core_initcall(print_banner); |
| 227 | |
Jeremy Fitzhardinge | d572929 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 228 | static struct resource reserve_ioports = { |
| 229 | .start = 0, |
| 230 | .end = IO_SPACE_LIMIT, |
| 231 | .name = "paravirt-ioport", |
| 232 | .flags = IORESOURCE_IO | IORESOURCE_BUSY, |
| 233 | }; |
| 234 | |
Jeremy Fitzhardinge | d572929 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 235 | /* |
| 236 | * Reserve the whole legacy IO space to prevent any legacy drivers |
| 237 | * from wasting time probing for their hardware. This is a fairly |
| 238 | * brute-force approach to disabling all non-virtual drivers. |
| 239 | * |
| 240 | * Note that this must be called very early to have any effect. |
| 241 | */ |
| 242 | int paravirt_disable_iospace(void) |
| 243 | { |
Jeremy Fitzhardinge | f7743fe | 2008-03-27 17:28:40 -0700 | [diff] [blame] | 244 | return request_resource(&ioport_resource, &reserve_ioports); |
Jeremy Fitzhardinge | d572929 | 2007-07-17 18:37:04 -0700 | [diff] [blame] | 245 | } |
| 246 | |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 247 | static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; |
| 248 | |
| 249 | static inline void enter_lazy(enum paravirt_lazy_mode mode) |
| 250 | { |
Glauber de Oliveira Costa | bfd074e | 2008-01-30 13:32:11 +0100 | [diff] [blame] | 251 | BUG_ON(__get_cpu_var(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 252 | BUG_ON(preemptible()); |
| 253 | |
Glauber de Oliveira Costa | bfd074e | 2008-01-30 13:32:11 +0100 | [diff] [blame] | 254 | __get_cpu_var(paravirt_lazy_mode) = mode; |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | void paravirt_leave_lazy(enum paravirt_lazy_mode mode) |
| 258 | { |
Glauber de Oliveira Costa | bfd074e | 2008-01-30 13:32:11 +0100 | [diff] [blame] | 259 | BUG_ON(__get_cpu_var(paravirt_lazy_mode) != mode); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 260 | BUG_ON(preemptible()); |
| 261 | |
Glauber de Oliveira Costa | bfd074e | 2008-01-30 13:32:11 +0100 | [diff] [blame] | 262 | __get_cpu_var(paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | void paravirt_enter_lazy_mmu(void) |
| 266 | { |
| 267 | enter_lazy(PARAVIRT_LAZY_MMU); |
| 268 | } |
| 269 | |
| 270 | void paravirt_leave_lazy_mmu(void) |
| 271 | { |
| 272 | paravirt_leave_lazy(PARAVIRT_LAZY_MMU); |
| 273 | } |
| 274 | |
| 275 | void paravirt_enter_lazy_cpu(void) |
| 276 | { |
| 277 | enter_lazy(PARAVIRT_LAZY_CPU); |
| 278 | } |
| 279 | |
| 280 | void paravirt_leave_lazy_cpu(void) |
| 281 | { |
| 282 | paravirt_leave_lazy(PARAVIRT_LAZY_CPU); |
| 283 | } |
| 284 | |
| 285 | enum paravirt_lazy_mode paravirt_get_lazy_mode(void) |
| 286 | { |
Glauber de Oliveira Costa | bfd074e | 2008-01-30 13:32:11 +0100 | [diff] [blame] | 287 | return __get_cpu_var(paravirt_lazy_mode); |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 288 | } |
| 289 | |
Jeremy Fitzhardinge | d85cf93 | 2009-02-12 10:02:56 -0800 | [diff] [blame] | 290 | void arch_flush_lazy_mmu_mode(void) |
| 291 | { |
| 292 | preempt_disable(); |
| 293 | |
| 294 | if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) { |
Thomas Gleixner | 34b0900 | 2009-02-12 21:30:48 +0100 | [diff] [blame] | 295 | WARN_ON(preempt_count() == 1); |
Jeremy Fitzhardinge | d85cf93 | 2009-02-12 10:02:56 -0800 | [diff] [blame] | 296 | arch_leave_lazy_mmu_mode(); |
| 297 | arch_enter_lazy_mmu_mode(); |
| 298 | } |
| 299 | |
| 300 | preempt_enable(); |
| 301 | } |
| 302 | |
| 303 | void arch_flush_lazy_cpu_mode(void) |
| 304 | { |
| 305 | preempt_disable(); |
| 306 | |
| 307 | if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU) { |
Thomas Gleixner | 34b0900 | 2009-02-12 21:30:48 +0100 | [diff] [blame] | 308 | WARN_ON(preempt_count() == 1); |
Jeremy Fitzhardinge | d85cf93 | 2009-02-12 10:02:56 -0800 | [diff] [blame] | 309 | arch_leave_lazy_cpu_mode(); |
| 310 | arch_enter_lazy_cpu_mode(); |
| 311 | } |
| 312 | |
| 313 | preempt_enable(); |
| 314 | } |
| 315 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 316 | struct pv_info pv_info = { |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 317 | .name = "bare hardware", |
| 318 | .paravirt_enabled = 0, |
| 319 | .kernel_rpl = 0, |
Jeremy Fitzhardinge | 5311ab6 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 320 | .shared_kernel_pmd = 1, /* Only used when CONFIG_X86_PAE is set */ |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 321 | }; |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 322 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 323 | struct pv_init_ops pv_init_ops = { |
| 324 | .patch = native_patch, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 325 | .banner = default_banner, |
Jeremy Fitzhardinge | 4587623 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 326 | .arch_setup = paravirt_nop, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 327 | .memory_setup = machine_specific_memory_setup, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 328 | }; |
| 329 | |
| 330 | struct pv_time_ops pv_time_ops = { |
| 331 | .time_init = hpet_time_init, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 332 | .get_wallclock = native_get_wallclock, |
| 333 | .set_wallclock = native_set_wallclock, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 334 | .sched_clock = native_sched_clock, |
Alok Kataria | e93ef94 | 2008-07-01 11:43:36 -0700 | [diff] [blame] | 335 | .get_tsc_khz = native_calibrate_tsc, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 336 | }; |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 337 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 338 | struct pv_irq_ops pv_irq_ops = { |
| 339 | .init_IRQ = native_init_IRQ, |
Jeremy Fitzhardinge | ecb93d1 | 2009-01-28 14:35:05 -0800 | [diff] [blame] | 340 | .save_fl = __PV_IS_CALLEE_SAVE(native_save_fl), |
| 341 | .restore_fl = __PV_IS_CALLEE_SAVE(native_restore_fl), |
| 342 | .irq_disable = __PV_IS_CALLEE_SAVE(native_irq_disable), |
| 343 | .irq_enable = __PV_IS_CALLEE_SAVE(native_irq_enable), |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 344 | .safe_halt = native_safe_halt, |
| 345 | .halt = native_halt, |
Jeremy Fitzhardinge | fab5842 | 2008-06-25 00:19:31 -0400 | [diff] [blame] | 346 | #ifdef CONFIG_X86_64 |
| 347 | .adjust_exception_frame = paravirt_nop, |
| 348 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 349 | }; |
| 350 | |
| 351 | struct pv_cpu_ops pv_cpu_ops = { |
| 352 | .cpuid = native_cpuid, |
| 353 | .get_debugreg = native_get_debugreg, |
| 354 | .set_debugreg = native_set_debugreg, |
| 355 | .clts = native_clts, |
| 356 | .read_cr0 = native_read_cr0, |
| 357 | .write_cr0 = native_write_cr0, |
| 358 | .read_cr4 = native_read_cr4, |
| 359 | .read_cr4_safe = native_read_cr4_safe, |
| 360 | .write_cr4 = native_write_cr4, |
Glauber de Oliveira Costa | 88b4755 | 2008-01-30 13:33:19 +0100 | [diff] [blame] | 361 | #ifdef CONFIG_X86_64 |
| 362 | .read_cr8 = native_read_cr8, |
| 363 | .write_cr8 = native_write_cr8, |
| 364 | #endif |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 365 | .wbinvd = native_wbinvd, |
Rusty Russell | 90a0a06 | 2007-05-02 19:27:10 +0200 | [diff] [blame] | 366 | .read_msr = native_read_msr_safe, |
Yinghai Lu | b05f78f | 2008-08-22 01:32:50 -0700 | [diff] [blame] | 367 | .read_msr_amd = native_read_msr_amd_safe, |
Rusty Russell | 90a0a06 | 2007-05-02 19:27:10 +0200 | [diff] [blame] | 368 | .write_msr = native_write_msr_safe, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 369 | .read_tsc = native_read_tsc, |
| 370 | .read_pmc = native_read_pmc, |
Glauber de Oliveira Costa | e5aaac4 | 2008-01-30 13:32:05 +0100 | [diff] [blame] | 371 | .read_tscp = native_read_tscp, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 372 | .load_tr_desc = native_load_tr_desc, |
| 373 | .set_ldt = native_set_ldt, |
| 374 | .load_gdt = native_load_gdt, |
| 375 | .load_idt = native_load_idt, |
| 376 | .store_gdt = native_store_gdt, |
| 377 | .store_idt = native_store_idt, |
| 378 | .store_tr = native_store_tr, |
| 379 | .load_tls = native_load_tls, |
Jeremy Fitzhardinge | 9f9d489 | 2008-06-25 00:19:32 -0400 | [diff] [blame] | 380 | #ifdef CONFIG_X86_64 |
| 381 | .load_gs_index = native_load_gs_index, |
| 382 | #endif |
Glauber de Oliveira Costa | 75b8bb3 | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 383 | .write_ldt_entry = native_write_ldt_entry, |
Glauber de Oliveira Costa | 014b15b | 2008-01-30 13:31:13 +0100 | [diff] [blame] | 384 | .write_gdt_entry = native_write_gdt_entry, |
Glauber de Oliveira Costa | 8d94734 | 2008-01-30 13:31:12 +0100 | [diff] [blame] | 385 | .write_idt_entry = native_write_idt_entry, |
Jeremy Fitzhardinge | 38ffbe6 | 2008-07-23 14:21:18 -0700 | [diff] [blame] | 386 | |
| 387 | .alloc_ldt = paravirt_nop, |
| 388 | .free_ldt = paravirt_nop, |
| 389 | |
H. Peter Anvin | faca622 | 2008-01-30 13:31:02 +0100 | [diff] [blame] | 390 | .load_sp0 = native_load_sp0, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 391 | |
Jeremy Fitzhardinge | 102d0a4 | 2008-06-30 11:10:53 -0700 | [diff] [blame] | 392 | #if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION) |
Jeremy Fitzhardinge | d75cd22f | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 393 | .irq_enable_sysexit = native_irq_enable_sysexit, |
Jeremy Fitzhardinge | 102d0a4 | 2008-06-30 11:10:53 -0700 | [diff] [blame] | 394 | #endif |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 395 | #ifdef CONFIG_X86_64 |
Jeremy Fitzhardinge | 102d0a4 | 2008-06-30 11:10:53 -0700 | [diff] [blame] | 396 | #ifdef CONFIG_IA32_EMULATION |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 397 | .usergs_sysret32 = native_usergs_sysret32, |
Jeremy Fitzhardinge | 102d0a4 | 2008-06-30 11:10:53 -0700 | [diff] [blame] | 398 | #endif |
Jeremy Fitzhardinge | 2be2998 | 2008-06-25 00:19:28 -0400 | [diff] [blame] | 399 | .usergs_sysret64 = native_usergs_sysret64, |
Jeremy Fitzhardinge | d75cd22f | 2008-06-25 00:19:26 -0400 | [diff] [blame] | 400 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 401 | .iret = native_iret, |
Glauber de Oliveira Costa | e801f86 | 2008-01-30 13:32:08 +0100 | [diff] [blame] | 402 | .swapgs = native_swapgs, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 403 | |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 404 | .set_iopl_mask = native_set_iopl_mask, |
| 405 | .io_delay = native_io_delay, |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 406 | |
| 407 | .lazy_mode = { |
| 408 | .enter = paravirt_nop, |
| 409 | .leave = paravirt_nop, |
| 410 | }, |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 411 | }; |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 412 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 413 | struct pv_apic_ops pv_apic_ops = { |
Rusty Russell | 13623d7 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 414 | #ifdef CONFIG_X86_LOCAL_APIC |
Zachary Amsden | bbab4f3 | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 415 | .setup_boot_clock = setup_boot_APIC_clock, |
| 416 | .setup_secondary_clock = setup_secondary_APIC_clock, |
Jeremy Fitzhardinge | 0260c19 | 2007-05-02 19:27:18 +0200 | [diff] [blame] | 417 | .startup_ipi_hook = paravirt_nop, |
Rusty Russell | 13623d7 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 418 | #endif |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 419 | }; |
Rusty Russell | 13623d7 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 420 | |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 421 | #if defined(CONFIG_X86_32) && !defined(CONFIG_X86_PAE) |
| 422 | /* 32-bit pagetable entries */ |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 423 | #define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_32) |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 424 | #else |
| 425 | /* 64-bit pagetable entries */ |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 426 | #define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_64) |
Jeremy Fitzhardinge | 41edafd | 2009-01-28 14:35:02 -0800 | [diff] [blame] | 427 | #endif |
| 428 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 429 | struct pv_mmu_ops pv_mmu_ops = { |
Eduardo Habkost | d8dd8ee | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 430 | #ifndef CONFIG_X86_64 |
Jeremy Fitzhardinge | b239fb2 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 431 | .pagetable_setup_start = native_pagetable_setup_start, |
| 432 | .pagetable_setup_done = native_pagetable_setup_done, |
Eduardo Habkost | a312b37 | 2008-07-08 15:06:23 -0700 | [diff] [blame] | 433 | #else |
| 434 | .pagetable_setup_start = paravirt_nop, |
| 435 | .pagetable_setup_done = paravirt_nop, |
Eduardo Habkost | d8dd8ee | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 436 | #endif |
Jeremy Fitzhardinge | b239fb2 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 437 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 438 | .read_cr2 = native_read_cr2, |
| 439 | .write_cr2 = native_write_cr2, |
| 440 | .read_cr3 = native_read_cr3, |
| 441 | .write_cr3 = native_write_cr3, |
| 442 | |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 443 | .flush_tlb_user = native_flush_tlb, |
| 444 | .flush_tlb_kernel = native_flush_tlb_global, |
| 445 | .flush_tlb_single = native_flush_tlb_single, |
Jeremy Fitzhardinge | d4c1047 | 2007-05-02 19:27:15 +0200 | [diff] [blame] | 446 | .flush_tlb_others = native_flush_tlb_others, |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 447 | |
Jeremy Fitzhardinge | eba0045 | 2008-06-25 00:19:12 -0400 | [diff] [blame] | 448 | .pgd_alloc = __paravirt_pgd_alloc, |
| 449 | .pgd_free = paravirt_nop, |
| 450 | |
Jeremy Fitzhardinge | 6944a9c | 2008-03-17 16:37:01 -0700 | [diff] [blame] | 451 | .alloc_pte = paravirt_nop, |
| 452 | .alloc_pmd = paravirt_nop, |
| 453 | .alloc_pmd_clone = paravirt_nop, |
Jeremy Fitzhardinge | 2761fa0 | 2008-03-17 16:37:02 -0700 | [diff] [blame] | 454 | .alloc_pud = paravirt_nop, |
Jeremy Fitzhardinge | 6944a9c | 2008-03-17 16:37:01 -0700 | [diff] [blame] | 455 | .release_pte = paravirt_nop, |
| 456 | .release_pmd = paravirt_nop, |
Jeremy Fitzhardinge | 2761fa0 | 2008-03-17 16:37:02 -0700 | [diff] [blame] | 457 | .release_pud = paravirt_nop, |
Zachary Amsden | c119ecc | 2007-02-13 13:26:21 +0100 | [diff] [blame] | 458 | |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 459 | .set_pte = native_set_pte, |
| 460 | .set_pte_at = native_set_pte_at, |
| 461 | .set_pmd = native_set_pmd, |
Jeremy Fitzhardinge | 4587623 | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 462 | .pte_update = paravirt_nop, |
| 463 | .pte_update_defer = paravirt_nop, |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 464 | |
Jeremy Fitzhardinge | 08b882c | 2008-06-16 04:30:01 -0700 | [diff] [blame] | 465 | .ptep_modify_prot_start = __ptep_modify_prot_start, |
| 466 | .ptep_modify_prot_commit = __ptep_modify_prot_commit, |
| 467 | |
Jeremy Fitzhardinge | ce6234b | 2007-05-02 19:27:15 +0200 | [diff] [blame] | 468 | #ifdef CONFIG_HIGHPTE |
| 469 | .kmap_atomic_pte = kmap_atomic, |
| 470 | #endif |
| 471 | |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 472 | #if PAGETABLE_LEVELS >= 3 |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 473 | #ifdef CONFIG_X86_PAE |
| 474 | .set_pte_atomic = native_set_pte_atomic, |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 475 | .pte_clear = native_pte_clear, |
| 476 | .pmd_clear = native_pmd_clear, |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 477 | #endif |
| 478 | .set_pud = native_set_pud, |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 479 | |
| 480 | .pmd_val = PTE_IDENT, |
| 481 | .make_pmd = PTE_IDENT, |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 482 | |
| 483 | #if PAGETABLE_LEVELS == 4 |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 484 | .pud_val = PTE_IDENT, |
| 485 | .make_pud = PTE_IDENT, |
| 486 | |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 487 | .set_pgd = native_set_pgd, |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 488 | #endif |
Eduardo Habkost | f95f2f7 | 2008-01-30 13:33:20 +0100 | [diff] [blame] | 489 | #endif /* PAGETABLE_LEVELS >= 3 */ |
Rusty Russell | da181a8 | 2006-12-07 02:14:08 +0100 | [diff] [blame] | 490 | |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 491 | .pte_val = PTE_IDENT, |
| 492 | .pgd_val = PTE_IDENT, |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 493 | |
Jeremy Fitzhardinge | da5de7c | 2009-01-28 14:35:07 -0800 | [diff] [blame] | 494 | .make_pte = PTE_IDENT, |
| 495 | .make_pgd = PTE_IDENT, |
Jeremy Fitzhardinge | 3dc494e | 2007-05-02 19:27:13 +0200 | [diff] [blame] | 496 | |
Jeremy Fitzhardinge | d6dd61c | 2007-05-02 19:27:14 +0200 | [diff] [blame] | 497 | .dup_mmap = paravirt_nop, |
| 498 | .exit_mmap = paravirt_nop, |
| 499 | .activate_mm = paravirt_nop, |
Jeremy Fitzhardinge | 8965c1c | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 500 | |
| 501 | .lazy_mode = { |
| 502 | .enter = paravirt_nop, |
| 503 | .leave = paravirt_nop, |
| 504 | }, |
Jeremy Fitzhardinge | aeaaa59 | 2008-06-17 11:42:01 -0700 | [diff] [blame] | 505 | |
| 506 | .set_fixmap = native_set_fixmap, |
Rusty Russell | d3561b7 | 2006-12-07 02:14:07 +0100 | [diff] [blame] | 507 | }; |
Ingo Molnar | 0dbe5a1 | 2007-01-22 20:40:36 -0800 | [diff] [blame] | 508 | |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 509 | EXPORT_SYMBOL_GPL(pv_time_ops); |
Jeremy Fitzhardinge | f97b895 | 2007-11-28 16:22:11 -0800 | [diff] [blame] | 510 | EXPORT_SYMBOL (pv_cpu_ops); |
| 511 | EXPORT_SYMBOL (pv_mmu_ops); |
Jeremy Fitzhardinge | 93b1eab | 2007-10-16 11:51:29 -0700 | [diff] [blame] | 512 | EXPORT_SYMBOL_GPL(pv_apic_ops); |
| 513 | EXPORT_SYMBOL_GPL(pv_info); |
| 514 | EXPORT_SYMBOL (pv_irq_ops); |