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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* Paravirtualization interfaces
3 Copyright (C) 2006 Rusty Russell IBM Corporation
4
5
6 2007 - x86_64 support added by Glauber de Oliveira Costa, Red Hat Inc
7*/
8
9#include <linux/errno.h>
10#include <linux/init.h>
11#include <linux/export.h>
12#include <linux/efi.h>
13#include <linux/bcd.h>
14#include <linux/highmem.h>
15#include <linux/kprobes.h>
16#include <linux/pgtable.h>
17#include <linux/static_call.h>
18
19#include <asm/bug.h>
20#include <asm/paravirt.h>
21#include <asm/debugreg.h>
22#include <asm/desc.h>
23#include <asm/setup.h>
24#include <asm/time.h>
25#include <asm/pgalloc.h>
26#include <asm/irq.h>
27#include <asm/delay.h>
28#include <asm/fixmap.h>
29#include <asm/apic.h>
30#include <asm/tlbflush.h>
31#include <asm/timer.h>
32#include <asm/special_insns.h>
33#include <asm/tlb.h>
34#include <asm/io_bitmap.h>
35#include <asm/gsseg.h>
36
37/* stub always returning 0. */
38DEFINE_ASM_FUNC(paravirt_ret0, "xor %eax,%eax", .entry.text);
39
40void __init default_banner(void)
41{
42 printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
43 pv_info.name);
44}
45
46#ifdef CONFIG_PARAVIRT_XXL
47DEFINE_ASM_FUNC(_paravirt_ident_64, "mov %rdi, %rax", .text);
48DEFINE_ASM_FUNC(pv_native_save_fl, "pushf; pop %rax", .noinstr.text);
49DEFINE_ASM_FUNC(pv_native_irq_disable, "cli", .noinstr.text);
50DEFINE_ASM_FUNC(pv_native_irq_enable, "sti", .noinstr.text);
51DEFINE_ASM_FUNC(pv_native_read_cr2, "mov %cr2, %rax", .noinstr.text);
52#endif
53
54DEFINE_STATIC_KEY_TRUE(virt_spin_lock_key);
55
56void __init native_pv_lock_init(void)
57{
58 if (IS_ENABLED(CONFIG_PARAVIRT_SPINLOCKS) &&
59 !boot_cpu_has(X86_FEATURE_HYPERVISOR))
60 static_branch_disable(&virt_spin_lock_key);
61}
62
63static void native_tlb_remove_table(struct mmu_gather *tlb, void *table)
64{
65 tlb_remove_page(tlb, table);
66}
67
68struct static_key paravirt_steal_enabled;
69struct static_key paravirt_steal_rq_enabled;
70
71static u64 native_steal_clock(int cpu)
72{
73 return 0;
74}
75
76DEFINE_STATIC_CALL(pv_steal_clock, native_steal_clock);
77DEFINE_STATIC_CALL(pv_sched_clock, native_sched_clock);
78
79void paravirt_set_sched_clock(u64 (*func)(void))
80{
81 static_call_update(pv_sched_clock, func);
82}
83
84/* These are in entry.S */
85static struct resource reserve_ioports = {
86 .start = 0,
87 .end = IO_SPACE_LIMIT,
88 .name = "paravirt-ioport",
89 .flags = IORESOURCE_IO | IORESOURCE_BUSY,
90};
91
92/*
93 * Reserve the whole legacy IO space to prevent any legacy drivers
94 * from wasting time probing for their hardware. This is a fairly
95 * brute-force approach to disabling all non-virtual drivers.
96 *
97 * Note that this must be called very early to have any effect.
98 */
99int paravirt_disable_iospace(void)
100{
101 return request_resource(&ioport_resource, &reserve_ioports);
102}
103
104#ifdef CONFIG_PARAVIRT_XXL
105static noinstr void pv_native_write_cr2(unsigned long val)
106{
107 native_write_cr2(val);
108}
109
110static noinstr unsigned long pv_native_get_debugreg(int regno)
111{
112 return native_get_debugreg(regno);
113}
114
115static noinstr void pv_native_set_debugreg(int regno, unsigned long val)
116{
117 native_set_debugreg(regno, val);
118}
119
120noinstr void pv_native_wbinvd(void)
121{
122 native_wbinvd();
123}
124
125static noinstr void pv_native_safe_halt(void)
126{
127 native_safe_halt();
128}
129#endif
130
131struct pv_info pv_info = {
132 .name = "bare hardware",
133#ifdef CONFIG_PARAVIRT_XXL
134 .extra_user_64bit_cs = __USER_CS,
135#endif
136};
137
138/* 64-bit pagetable entries */
139#define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_64)
140
141struct paravirt_patch_template pv_ops = {
142 /* Cpu ops. */
143 .cpu.io_delay = native_io_delay,
144
145#ifdef CONFIG_PARAVIRT_XXL
146 .cpu.cpuid = native_cpuid,
147 .cpu.get_debugreg = pv_native_get_debugreg,
148 .cpu.set_debugreg = pv_native_set_debugreg,
149 .cpu.read_cr0 = native_read_cr0,
150 .cpu.write_cr0 = native_write_cr0,
151 .cpu.write_cr4 = native_write_cr4,
152 .cpu.wbinvd = pv_native_wbinvd,
153 .cpu.read_msr = native_read_msr,
154 .cpu.write_msr = native_write_msr,
155 .cpu.read_msr_safe = native_read_msr_safe,
156 .cpu.write_msr_safe = native_write_msr_safe,
157 .cpu.read_pmc = native_read_pmc,
158 .cpu.load_tr_desc = native_load_tr_desc,
159 .cpu.set_ldt = native_set_ldt,
160 .cpu.load_gdt = native_load_gdt,
161 .cpu.load_idt = native_load_idt,
162 .cpu.store_tr = native_store_tr,
163 .cpu.load_tls = native_load_tls,
164 .cpu.load_gs_index = native_load_gs_index,
165 .cpu.write_ldt_entry = native_write_ldt_entry,
166 .cpu.write_gdt_entry = native_write_gdt_entry,
167 .cpu.write_idt_entry = native_write_idt_entry,
168
169 .cpu.alloc_ldt = paravirt_nop,
170 .cpu.free_ldt = paravirt_nop,
171
172 .cpu.load_sp0 = native_load_sp0,
173
174#ifdef CONFIG_X86_IOPL_IOPERM
175 .cpu.invalidate_io_bitmap = native_tss_invalidate_io_bitmap,
176 .cpu.update_io_bitmap = native_tss_update_io_bitmap,
177#endif
178
179 .cpu.start_context_switch = paravirt_nop,
180 .cpu.end_context_switch = paravirt_nop,
181
182 /* Irq ops. */
183 .irq.save_fl = __PV_IS_CALLEE_SAVE(pv_native_save_fl),
184 .irq.irq_disable = __PV_IS_CALLEE_SAVE(pv_native_irq_disable),
185 .irq.irq_enable = __PV_IS_CALLEE_SAVE(pv_native_irq_enable),
186 .irq.safe_halt = pv_native_safe_halt,
187 .irq.halt = native_halt,
188#endif /* CONFIG_PARAVIRT_XXL */
189
190 /* Mmu ops. */
191 .mmu.flush_tlb_user = native_flush_tlb_local,
192 .mmu.flush_tlb_kernel = native_flush_tlb_global,
193 .mmu.flush_tlb_one_user = native_flush_tlb_one_user,
194 .mmu.flush_tlb_multi = native_flush_tlb_multi,
195 .mmu.tlb_remove_table = native_tlb_remove_table,
196
197 .mmu.exit_mmap = paravirt_nop,
198 .mmu.notify_page_enc_status_changed = paravirt_nop,
199
200#ifdef CONFIG_PARAVIRT_XXL
201 .mmu.read_cr2 = __PV_IS_CALLEE_SAVE(pv_native_read_cr2),
202 .mmu.write_cr2 = pv_native_write_cr2,
203 .mmu.read_cr3 = __native_read_cr3,
204 .mmu.write_cr3 = native_write_cr3,
205
206 .mmu.pgd_alloc = __paravirt_pgd_alloc,
207 .mmu.pgd_free = paravirt_nop,
208
209 .mmu.alloc_pte = paravirt_nop,
210 .mmu.alloc_pmd = paravirt_nop,
211 .mmu.alloc_pud = paravirt_nop,
212 .mmu.alloc_p4d = paravirt_nop,
213 .mmu.release_pte = paravirt_nop,
214 .mmu.release_pmd = paravirt_nop,
215 .mmu.release_pud = paravirt_nop,
216 .mmu.release_p4d = paravirt_nop,
217
218 .mmu.set_pte = native_set_pte,
219 .mmu.set_pmd = native_set_pmd,
220
221 .mmu.ptep_modify_prot_start = __ptep_modify_prot_start,
222 .mmu.ptep_modify_prot_commit = __ptep_modify_prot_commit,
223
224 .mmu.set_pud = native_set_pud,
225
226 .mmu.pmd_val = PTE_IDENT,
227 .mmu.make_pmd = PTE_IDENT,
228
229 .mmu.pud_val = PTE_IDENT,
230 .mmu.make_pud = PTE_IDENT,
231
232 .mmu.set_p4d = native_set_p4d,
233
234#if CONFIG_PGTABLE_LEVELS >= 5
235 .mmu.p4d_val = PTE_IDENT,
236 .mmu.make_p4d = PTE_IDENT,
237
238 .mmu.set_pgd = native_set_pgd,
239#endif /* CONFIG_PGTABLE_LEVELS >= 5 */
240
241 .mmu.pte_val = PTE_IDENT,
242 .mmu.pgd_val = PTE_IDENT,
243
244 .mmu.make_pte = PTE_IDENT,
245 .mmu.make_pgd = PTE_IDENT,
246
247 .mmu.enter_mmap = paravirt_nop,
248
249 .mmu.lazy_mode = {
250 .enter = paravirt_nop,
251 .leave = paravirt_nop,
252 .flush = paravirt_nop,
253 },
254
255 .mmu.set_fixmap = native_set_fixmap,
256#endif /* CONFIG_PARAVIRT_XXL */
257
258#if defined(CONFIG_PARAVIRT_SPINLOCKS)
259 /* Lock ops. */
260#ifdef CONFIG_SMP
261 .lock.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath,
262 .lock.queued_spin_unlock =
263 PV_CALLEE_SAVE(__native_queued_spin_unlock),
264 .lock.wait = paravirt_nop,
265 .lock.kick = paravirt_nop,
266 .lock.vcpu_is_preempted =
267 PV_CALLEE_SAVE(__native_vcpu_is_preempted),
268#endif /* SMP */
269#endif
270};
271
272#ifdef CONFIG_PARAVIRT_XXL
273NOKPROBE_SYMBOL(native_load_idt);
274#endif
275
276EXPORT_SYMBOL(pv_ops);
277EXPORT_SYMBOL_GPL(pv_info);
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
17
18 2007 - x86_64 support added by Glauber de Oliveira Costa, Red Hat Inc
19*/
20
21#include <linux/errno.h>
22#include <linux/init.h>
23#include <linux/export.h>
24#include <linux/efi.h>
25#include <linux/bcd.h>
26#include <linux/highmem.h>
27#include <linux/kprobes.h>
28
29#include <asm/bug.h>
30#include <asm/paravirt.h>
31#include <asm/debugreg.h>
32#include <asm/desc.h>
33#include <asm/setup.h>
34#include <asm/pgtable.h>
35#include <asm/time.h>
36#include <asm/pgalloc.h>
37#include <asm/irq.h>
38#include <asm/delay.h>
39#include <asm/fixmap.h>
40#include <asm/apic.h>
41#include <asm/tlbflush.h>
42#include <asm/timer.h>
43#include <asm/special_insns.h>
44
45/*
46 * nop stub, which must not clobber anything *including the stack* to
47 * avoid confusing the entry prologues.
48 */
49extern void _paravirt_nop(void);
50asm (".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");
57
58/* identity function, which can be inlined */
59u32 notrace _paravirt_ident_32(u32 x)
60{
61 return x;
62}
63
64u64 notrace _paravirt_ident_64(u64 x)
65{
66 return x;
67}
68
69void __init default_banner(void)
70{
71 printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
72 pv_info.name);
73}
74
75/* Undefined instruction for dealing with missing ops pointers. */
76static const unsigned char ud2a[] = { 0x0f, 0x0b };
77
78struct branch {
79 unsigned char opcode;
80 u32 delta;
81} __attribute__((packed));
82
83unsigned paravirt_patch_call(void *insnbuf,
84 const void *target, u16 tgt_clobbers,
85 unsigned long addr, u16 site_clobbers,
86 unsigned len)
87{
88 struct branch *b = insnbuf;
89 unsigned long delta = (unsigned long)target - (addr+5);
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
96 b->opcode = 0xe8; /* call */
97 b->delta = delta;
98 BUILD_BUG_ON(sizeof(*b) != 5);
99
100 return 5;
101}
102
103unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
104 unsigned long addr, unsigned len)
105{
106 struct branch *b = insnbuf;
107 unsigned long delta = (unsigned long)target - (addr+5);
108
109 if (len < 5)
110 return len; /* call too long for patch site */
111
112 b->opcode = 0xe9; /* jmp */
113 b->delta = delta;
114
115 return 5;
116}
117
118/* Neat trick to map patch type back to the call within the
119 * corresponding structure. */
120static void *get_call_destination(u8 type)
121{
122 struct paravirt_patch_template tmpl = {
123 .pv_init_ops = pv_init_ops,
124 .pv_time_ops = pv_time_ops,
125 .pv_cpu_ops = pv_cpu_ops,
126 .pv_irq_ops = pv_irq_ops,
127 .pv_mmu_ops = pv_mmu_ops,
128#ifdef CONFIG_PARAVIRT_SPINLOCKS
129 .pv_lock_ops = pv_lock_ops,
130#endif
131 };
132 return *((void **)&tmpl + type);
133}
134
135unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
136 unsigned long addr, unsigned len)
137{
138 void *opfunc = get_call_destination(type);
139 unsigned ret;
140
141 if (opfunc == NULL)
142 /* If there's no function, patch it with a ud2a (BUG) */
143 ret = paravirt_patch_insns(insnbuf, len, ud2a, ud2a+sizeof(ud2a));
144 else if (opfunc == _paravirt_nop)
145 ret = 0;
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
153 else if (type == PARAVIRT_PATCH(pv_cpu_ops.iret) ||
154 type == PARAVIRT_PATCH(pv_cpu_ops.usergs_sysret64))
155 /* If operation requires a jmp, then jmp */
156 ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len);
157 else
158 /* Otherwise call the function; assume target could
159 clobber any caller-save reg */
160 ret = paravirt_patch_call(insnbuf, opfunc, CLBR_ANY,
161 addr, clobbers, len);
162
163 return ret;
164}
165
166unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
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
174 memcpy(insnbuf, start, insn_len);
175
176 return insn_len;
177}
178
179static void native_flush_tlb(void)
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 */
188static void native_flush_tlb_global(void)
189{
190 __native_flush_tlb_global();
191}
192
193static void native_flush_tlb_single(unsigned long addr)
194{
195 __native_flush_tlb_single(addr);
196}
197
198struct static_key paravirt_steal_enabled;
199struct static_key paravirt_steal_rq_enabled;
200
201static u64 native_steal_clock(int cpu)
202{
203 return 0;
204}
205
206/* These are in entry.S */
207extern void native_iret(void);
208extern void native_usergs_sysret64(void);
209
210static struct resource reserve_ioports = {
211 .start = 0,
212 .end = IO_SPACE_LIMIT,
213 .name = "paravirt-ioport",
214 .flags = IORESOURCE_IO | IORESOURCE_BUSY,
215};
216
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 */
224int paravirt_disable_iospace(void)
225{
226 return request_resource(&ioport_resource, &reserve_ioports);
227}
228
229static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE;
230
231static inline void enter_lazy(enum paravirt_lazy_mode mode)
232{
233 BUG_ON(this_cpu_read(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE);
234
235 this_cpu_write(paravirt_lazy_mode, mode);
236}
237
238static void leave_lazy(enum paravirt_lazy_mode mode)
239{
240 BUG_ON(this_cpu_read(paravirt_lazy_mode) != mode);
241
242 this_cpu_write(paravirt_lazy_mode, PARAVIRT_LAZY_NONE);
243}
244
245void paravirt_enter_lazy_mmu(void)
246{
247 enter_lazy(PARAVIRT_LAZY_MMU);
248}
249
250void paravirt_leave_lazy_mmu(void)
251{
252 leave_lazy(PARAVIRT_LAZY_MMU);
253}
254
255void 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
267void paravirt_start_context_switch(struct task_struct *prev)
268{
269 BUG_ON(preemptible());
270
271 if (this_cpu_read(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU) {
272 arch_leave_lazy_mmu_mode();
273 set_ti_thread_flag(task_thread_info(prev), TIF_LAZY_MMU_UPDATES);
274 }
275 enter_lazy(PARAVIRT_LAZY_CPU);
276}
277
278void paravirt_end_context_switch(struct task_struct *next)
279{
280 BUG_ON(preemptible());
281
282 leave_lazy(PARAVIRT_LAZY_CPU);
283
284 if (test_and_clear_ti_thread_flag(task_thread_info(next), TIF_LAZY_MMU_UPDATES))
285 arch_enter_lazy_mmu_mode();
286}
287
288enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
289{
290 if (in_interrupt())
291 return PARAVIRT_LAZY_NONE;
292
293 return this_cpu_read(paravirt_lazy_mode);
294}
295
296struct pv_info pv_info = {
297 .name = "bare hardware",
298 .kernel_rpl = 0,
299 .shared_kernel_pmd = 1, /* Only used when CONFIG_X86_PAE is set */
300
301#ifdef CONFIG_X86_64
302 .extra_user_64bit_cs = __USER_CS,
303#endif
304};
305
306struct pv_init_ops pv_init_ops = {
307 .patch = native_patch,
308};
309
310struct pv_time_ops pv_time_ops = {
311 .sched_clock = native_sched_clock,
312 .steal_clock = native_steal_clock,
313};
314
315__visible struct pv_irq_ops pv_irq_ops = {
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),
320 .safe_halt = native_safe_halt,
321 .halt = native_halt,
322#ifdef CONFIG_X86_64
323 .adjust_exception_frame = paravirt_nop,
324#endif
325};
326
327__visible struct pv_cpu_ops pv_cpu_ops = {
328 .cpuid = native_cpuid,
329 .get_debugreg = native_get_debugreg,
330 .set_debugreg = native_set_debugreg,
331 .read_cr0 = native_read_cr0,
332 .write_cr0 = native_write_cr0,
333 .read_cr4 = native_read_cr4,
334 .write_cr4 = native_write_cr4,
335#ifdef CONFIG_X86_64
336 .read_cr8 = native_read_cr8,
337 .write_cr8 = native_write_cr8,
338#endif
339 .wbinvd = native_wbinvd,
340 .read_msr = native_read_msr,
341 .write_msr = native_write_msr,
342 .read_msr_safe = native_read_msr_safe,
343 .write_msr_safe = native_write_msr_safe,
344 .read_pmc = native_read_pmc,
345 .load_tr_desc = native_load_tr_desc,
346 .set_ldt = native_set_ldt,
347 .load_gdt = native_load_gdt,
348 .load_idt = native_load_idt,
349 .store_idt = native_store_idt,
350 .store_tr = native_store_tr,
351 .load_tls = native_load_tls,
352#ifdef CONFIG_X86_64
353 .load_gs_index = native_load_gs_index,
354#endif
355 .write_ldt_entry = native_write_ldt_entry,
356 .write_gdt_entry = native_write_gdt_entry,
357 .write_idt_entry = native_write_idt_entry,
358
359 .alloc_ldt = paravirt_nop,
360 .free_ldt = paravirt_nop,
361
362 .load_sp0 = native_load_sp0,
363
364#ifdef CONFIG_X86_64
365 .usergs_sysret64 = native_usergs_sysret64,
366#endif
367 .iret = native_iret,
368 .swapgs = native_swapgs,
369
370 .set_iopl_mask = native_set_iopl_mask,
371 .io_delay = native_io_delay,
372
373 .start_context_switch = paravirt_nop,
374 .end_context_switch = paravirt_nop,
375};
376
377/* At this point, native_get/set_debugreg has real function entries */
378NOKPROBE_SYMBOL(native_get_debugreg);
379NOKPROBE_SYMBOL(native_set_debugreg);
380NOKPROBE_SYMBOL(native_load_idt);
381
382#if defined(CONFIG_X86_32) && !defined(CONFIG_X86_PAE)
383/* 32-bit pagetable entries */
384#define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_32)
385#else
386/* 64-bit pagetable entries */
387#define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_64)
388#endif
389
390struct pv_mmu_ops pv_mmu_ops __ro_after_init = {
391
392 .read_cr2 = native_read_cr2,
393 .write_cr2 = native_write_cr2,
394 .read_cr3 = native_read_cr3,
395 .write_cr3 = native_write_cr3,
396
397 .flush_tlb_user = native_flush_tlb,
398 .flush_tlb_kernel = native_flush_tlb_global,
399 .flush_tlb_single = native_flush_tlb_single,
400 .flush_tlb_others = native_flush_tlb_others,
401
402 .pgd_alloc = __paravirt_pgd_alloc,
403 .pgd_free = paravirt_nop,
404
405 .alloc_pte = paravirt_nop,
406 .alloc_pmd = paravirt_nop,
407 .alloc_pud = paravirt_nop,
408 .release_pte = paravirt_nop,
409 .release_pmd = paravirt_nop,
410 .release_pud = paravirt_nop,
411
412 .set_pte = native_set_pte,
413 .set_pte_at = native_set_pte_at,
414 .set_pmd = native_set_pmd,
415 .set_pmd_at = native_set_pmd_at,
416 .pte_update = paravirt_nop,
417
418 .ptep_modify_prot_start = __ptep_modify_prot_start,
419 .ptep_modify_prot_commit = __ptep_modify_prot_commit,
420
421#if CONFIG_PGTABLE_LEVELS >= 3
422#ifdef CONFIG_X86_PAE
423 .set_pte_atomic = native_set_pte_atomic,
424 .pte_clear = native_pte_clear,
425 .pmd_clear = native_pmd_clear,
426#endif
427 .set_pud = native_set_pud,
428
429 .pmd_val = PTE_IDENT,
430 .make_pmd = PTE_IDENT,
431
432#if CONFIG_PGTABLE_LEVELS == 4
433 .pud_val = PTE_IDENT,
434 .make_pud = PTE_IDENT,
435
436 .set_pgd = native_set_pgd,
437#endif
438#endif /* CONFIG_PGTABLE_LEVELS >= 3 */
439
440 .pte_val = PTE_IDENT,
441 .pgd_val = PTE_IDENT,
442
443 .make_pte = PTE_IDENT,
444 .make_pgd = PTE_IDENT,
445
446 .dup_mmap = paravirt_nop,
447 .exit_mmap = paravirt_nop,
448 .activate_mm = paravirt_nop,
449
450 .lazy_mode = {
451 .enter = paravirt_nop,
452 .leave = paravirt_nop,
453 .flush = paravirt_nop,
454 },
455
456 .set_fixmap = native_set_fixmap,
457};
458
459EXPORT_SYMBOL_GPL(pv_time_ops);
460EXPORT_SYMBOL (pv_cpu_ops);
461EXPORT_SYMBOL (pv_mmu_ops);
462EXPORT_SYMBOL_GPL(pv_info);
463EXPORT_SYMBOL (pv_irq_ops);