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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/module.h>
23#include <linux/efi.h>
24#include <linux/bcd.h>
25#include <linux/highmem.h>
26
27#include <asm/bug.h>
28#include <asm/paravirt.h>
29#include <asm/debugreg.h>
30#include <asm/desc.h>
31#include <asm/setup.h>
32#include <asm/pgtable.h>
33#include <asm/time.h>
34#include <asm/pgalloc.h>
35#include <asm/irq.h>
36#include <asm/delay.h>
37#include <asm/fixmap.h>
38#include <asm/apic.h>
39#include <asm/tlbflush.h>
40#include <asm/timer.h>
41#include <asm/special_insns.h>
42
43/* nop stub */
44void _paravirt_nop(void)
45{
46}
47
48/* identity function, which can be inlined */
49u32 _paravirt_ident_32(u32 x)
50{
51 return x;
52}
53
54u64 _paravirt_ident_64(u64 x)
55{
56 return x;
57}
58
59void __init default_banner(void)
60{
61 printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
62 pv_info.name);
63}
64
65/* Simple instruction patching code. */
66#define DEF_NATIVE(ops, name, code) \
67 extern const char start_##ops##_##name[], end_##ops##_##name[]; \
68 asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
69
70/* Undefined instruction for dealing with missing ops pointers. */
71static const unsigned char ud2a[] = { 0x0f, 0x0b };
72
73unsigned paravirt_patch_nop(void)
74{
75 return 0;
76}
77
78unsigned paravirt_patch_ignore(unsigned len)
79{
80 return len;
81}
82
83struct branch {
84 unsigned char opcode;
85 u32 delta;
86} __attribute__((packed));
87
88unsigned paravirt_patch_call(void *insnbuf,
89 const void *target, u16 tgt_clobbers,
90 unsigned long addr, u16 site_clobbers,
91 unsigned len)
92{
93 struct branch *b = insnbuf;
94 unsigned long delta = (unsigned long)target - (addr+5);
95
96 if (tgt_clobbers & ~site_clobbers)
97 return len; /* target would clobber too much for this site */
98 if (len < 5)
99 return len; /* call too long for patch site */
100
101 b->opcode = 0xe8; /* call */
102 b->delta = delta;
103 BUILD_BUG_ON(sizeof(*b) != 5);
104
105 return 5;
106}
107
108unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
109 unsigned long addr, unsigned len)
110{
111 struct branch *b = insnbuf;
112 unsigned long delta = (unsigned long)target - (addr+5);
113
114 if (len < 5)
115 return len; /* call too long for patch site */
116
117 b->opcode = 0xe9; /* jmp */
118 b->delta = delta;
119
120 return 5;
121}
122
123/* Neat trick to map patch type back to the call within the
124 * corresponding structure. */
125static void *get_call_destination(u8 type)
126{
127 struct paravirt_patch_template tmpl = {
128 .pv_init_ops = pv_init_ops,
129 .pv_time_ops = pv_time_ops,
130 .pv_cpu_ops = pv_cpu_ops,
131 .pv_irq_ops = pv_irq_ops,
132 .pv_apic_ops = pv_apic_ops,
133 .pv_mmu_ops = pv_mmu_ops,
134#ifdef CONFIG_PARAVIRT_SPINLOCKS
135 .pv_lock_ops = pv_lock_ops,
136#endif
137 };
138 return *((void **)&tmpl + type);
139}
140
141unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
142 unsigned long addr, unsigned len)
143{
144 void *opfunc = get_call_destination(type);
145 unsigned ret;
146
147 if (opfunc == NULL)
148 /* If there's no function, patch it with a ud2a (BUG) */
149 ret = paravirt_patch_insns(insnbuf, len, ud2a, ud2a+sizeof(ud2a));
150 else if (opfunc == _paravirt_nop)
151 /* If the operation is a nop, then nop the callsite */
152 ret = paravirt_patch_nop();
153
154 /* identity functions just return their single argument */
155 else if (opfunc == _paravirt_ident_32)
156 ret = paravirt_patch_ident_32(insnbuf, len);
157 else if (opfunc == _paravirt_ident_64)
158 ret = paravirt_patch_ident_64(insnbuf, len);
159
160 else if (type == PARAVIRT_PATCH(pv_cpu_ops.iret) ||
161 type == PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit) ||
162 type == PARAVIRT_PATCH(pv_cpu_ops.usergs_sysret32) ||
163 type == PARAVIRT_PATCH(pv_cpu_ops.usergs_sysret64))
164 /* If operation requires a jmp, then jmp */
165 ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len);
166 else
167 /* Otherwise call the function; assume target could
168 clobber any caller-save reg */
169 ret = paravirt_patch_call(insnbuf, opfunc, CLBR_ANY,
170 addr, clobbers, len);
171
172 return ret;
173}
174
175unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
176 const char *start, const char *end)
177{
178 unsigned insn_len = end - start;
179
180 if (insn_len > len || start == NULL)
181 insn_len = len;
182 else
183 memcpy(insnbuf, start, insn_len);
184
185 return insn_len;
186}
187
188static void native_flush_tlb(void)
189{
190 __native_flush_tlb();
191}
192
193/*
194 * Global pages have to be flushed a bit differently. Not a real
195 * performance problem because this does not happen often.
196 */
197static void native_flush_tlb_global(void)
198{
199 __native_flush_tlb_global();
200}
201
202static void native_flush_tlb_single(unsigned long addr)
203{
204 __native_flush_tlb_single(addr);
205}
206
207struct static_key paravirt_steal_enabled;
208struct static_key paravirt_steal_rq_enabled;
209
210static u64 native_steal_clock(int cpu)
211{
212 return 0;
213}
214
215/* These are in entry.S */
216extern void native_iret(void);
217extern void native_irq_enable_sysexit(void);
218extern void native_usergs_sysret32(void);
219extern void native_usergs_sysret64(void);
220
221static struct resource reserve_ioports = {
222 .start = 0,
223 .end = IO_SPACE_LIMIT,
224 .name = "paravirt-ioport",
225 .flags = IORESOURCE_IO | IORESOURCE_BUSY,
226};
227
228/*
229 * Reserve the whole legacy IO space to prevent any legacy drivers
230 * from wasting time probing for their hardware. This is a fairly
231 * brute-force approach to disabling all non-virtual drivers.
232 *
233 * Note that this must be called very early to have any effect.
234 */
235int paravirt_disable_iospace(void)
236{
237 return request_resource(&ioport_resource, &reserve_ioports);
238}
239
240static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE;
241
242static inline void enter_lazy(enum paravirt_lazy_mode mode)
243{
244 BUG_ON(this_cpu_read(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE);
245
246 this_cpu_write(paravirt_lazy_mode, mode);
247}
248
249static void leave_lazy(enum paravirt_lazy_mode mode)
250{
251 BUG_ON(this_cpu_read(paravirt_lazy_mode) != mode);
252
253 this_cpu_write(paravirt_lazy_mode, PARAVIRT_LAZY_NONE);
254}
255
256void paravirt_enter_lazy_mmu(void)
257{
258 enter_lazy(PARAVIRT_LAZY_MMU);
259}
260
261void paravirt_leave_lazy_mmu(void)
262{
263 leave_lazy(PARAVIRT_LAZY_MMU);
264}
265
266void paravirt_start_context_switch(struct task_struct *prev)
267{
268 BUG_ON(preemptible());
269
270 if (this_cpu_read(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU) {
271 arch_leave_lazy_mmu_mode();
272 set_ti_thread_flag(task_thread_info(prev), TIF_LAZY_MMU_UPDATES);
273 }
274 enter_lazy(PARAVIRT_LAZY_CPU);
275}
276
277void paravirt_end_context_switch(struct task_struct *next)
278{
279 BUG_ON(preemptible());
280
281 leave_lazy(PARAVIRT_LAZY_CPU);
282
283 if (test_and_clear_ti_thread_flag(task_thread_info(next), TIF_LAZY_MMU_UPDATES))
284 arch_enter_lazy_mmu_mode();
285}
286
287enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
288{
289 if (in_interrupt())
290 return PARAVIRT_LAZY_NONE;
291
292 return this_cpu_read(paravirt_lazy_mode);
293}
294
295void arch_flush_lazy_mmu_mode(void)
296{
297 preempt_disable();
298
299 if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) {
300 arch_leave_lazy_mmu_mode();
301 arch_enter_lazy_mmu_mode();
302 }
303
304 preempt_enable();
305}
306
307struct pv_info pv_info = {
308 .name = "bare hardware",
309 .paravirt_enabled = 0,
310 .kernel_rpl = 0,
311 .shared_kernel_pmd = 1, /* Only used when CONFIG_X86_PAE is set */
312
313#ifdef CONFIG_X86_64
314 .extra_user_64bit_cs = __USER_CS,
315#endif
316};
317
318struct pv_init_ops pv_init_ops = {
319 .patch = native_patch,
320};
321
322struct pv_time_ops pv_time_ops = {
323 .sched_clock = native_sched_clock,
324 .steal_clock = native_steal_clock,
325};
326
327struct pv_irq_ops pv_irq_ops = {
328 .save_fl = __PV_IS_CALLEE_SAVE(native_save_fl),
329 .restore_fl = __PV_IS_CALLEE_SAVE(native_restore_fl),
330 .irq_disable = __PV_IS_CALLEE_SAVE(native_irq_disable),
331 .irq_enable = __PV_IS_CALLEE_SAVE(native_irq_enable),
332 .safe_halt = native_safe_halt,
333 .halt = native_halt,
334#ifdef CONFIG_X86_64
335 .adjust_exception_frame = paravirt_nop,
336#endif
337};
338
339struct pv_cpu_ops pv_cpu_ops = {
340 .cpuid = native_cpuid,
341 .get_debugreg = native_get_debugreg,
342 .set_debugreg = native_set_debugreg,
343 .clts = native_clts,
344 .read_cr0 = native_read_cr0,
345 .write_cr0 = native_write_cr0,
346 .read_cr4 = native_read_cr4,
347 .read_cr4_safe = native_read_cr4_safe,
348 .write_cr4 = native_write_cr4,
349#ifdef CONFIG_X86_64
350 .read_cr8 = native_read_cr8,
351 .write_cr8 = native_write_cr8,
352#endif
353 .wbinvd = native_wbinvd,
354 .read_msr = native_read_msr_safe,
355 .rdmsr_regs = native_rdmsr_safe_regs,
356 .write_msr = native_write_msr_safe,
357 .wrmsr_regs = native_wrmsr_safe_regs,
358 .read_tsc = native_read_tsc,
359 .read_pmc = native_read_pmc,
360 .read_tscp = native_read_tscp,
361 .load_tr_desc = native_load_tr_desc,
362 .set_ldt = native_set_ldt,
363 .load_gdt = native_load_gdt,
364 .load_idt = native_load_idt,
365 .store_gdt = native_store_gdt,
366 .store_idt = native_store_idt,
367 .store_tr = native_store_tr,
368 .load_tls = native_load_tls,
369#ifdef CONFIG_X86_64
370 .load_gs_index = native_load_gs_index,
371#endif
372 .write_ldt_entry = native_write_ldt_entry,
373 .write_gdt_entry = native_write_gdt_entry,
374 .write_idt_entry = native_write_idt_entry,
375
376 .alloc_ldt = paravirt_nop,
377 .free_ldt = paravirt_nop,
378
379 .load_sp0 = native_load_sp0,
380
381#if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
382 .irq_enable_sysexit = native_irq_enable_sysexit,
383#endif
384#ifdef CONFIG_X86_64
385#ifdef CONFIG_IA32_EMULATION
386 .usergs_sysret32 = native_usergs_sysret32,
387#endif
388 .usergs_sysret64 = native_usergs_sysret64,
389#endif
390 .iret = native_iret,
391 .swapgs = native_swapgs,
392
393 .set_iopl_mask = native_set_iopl_mask,
394 .io_delay = native_io_delay,
395
396 .start_context_switch = paravirt_nop,
397 .end_context_switch = paravirt_nop,
398};
399
400struct pv_apic_ops pv_apic_ops = {
401#ifdef CONFIG_X86_LOCAL_APIC
402 .startup_ipi_hook = paravirt_nop,
403#endif
404};
405
406#if defined(CONFIG_X86_32) && !defined(CONFIG_X86_PAE)
407/* 32-bit pagetable entries */
408#define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_32)
409#else
410/* 64-bit pagetable entries */
411#define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_64)
412#endif
413
414struct pv_mmu_ops pv_mmu_ops = {
415
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
421 .flush_tlb_user = native_flush_tlb,
422 .flush_tlb_kernel = native_flush_tlb_global,
423 .flush_tlb_single = native_flush_tlb_single,
424 .flush_tlb_others = native_flush_tlb_others,
425
426 .pgd_alloc = __paravirt_pgd_alloc,
427 .pgd_free = paravirt_nop,
428
429 .alloc_pte = paravirt_nop,
430 .alloc_pmd = paravirt_nop,
431 .alloc_pud = paravirt_nop,
432 .release_pte = paravirt_nop,
433 .release_pmd = paravirt_nop,
434 .release_pud = paravirt_nop,
435
436 .set_pte = native_set_pte,
437 .set_pte_at = native_set_pte_at,
438 .set_pmd = native_set_pmd,
439 .set_pmd_at = native_set_pmd_at,
440 .pte_update = paravirt_nop,
441 .pte_update_defer = paravirt_nop,
442 .pmd_update = paravirt_nop,
443 .pmd_update_defer = paravirt_nop,
444
445 .ptep_modify_prot_start = __ptep_modify_prot_start,
446 .ptep_modify_prot_commit = __ptep_modify_prot_commit,
447
448#if PAGETABLE_LEVELS >= 3
449#ifdef CONFIG_X86_PAE
450 .set_pte_atomic = native_set_pte_atomic,
451 .pte_clear = native_pte_clear,
452 .pmd_clear = native_pmd_clear,
453#endif
454 .set_pud = native_set_pud,
455
456 .pmd_val = PTE_IDENT,
457 .make_pmd = PTE_IDENT,
458
459#if PAGETABLE_LEVELS == 4
460 .pud_val = PTE_IDENT,
461 .make_pud = PTE_IDENT,
462
463 .set_pgd = native_set_pgd,
464#endif
465#endif /* PAGETABLE_LEVELS >= 3 */
466
467 .pte_val = PTE_IDENT,
468 .pgd_val = PTE_IDENT,
469
470 .make_pte = PTE_IDENT,
471 .make_pgd = PTE_IDENT,
472
473 .dup_mmap = paravirt_nop,
474 .exit_mmap = paravirt_nop,
475 .activate_mm = paravirt_nop,
476
477 .lazy_mode = {
478 .enter = paravirt_nop,
479 .leave = paravirt_nop,
480 },
481
482 .set_fixmap = native_set_fixmap,
483};
484
485EXPORT_SYMBOL_GPL(pv_time_ops);
486EXPORT_SYMBOL (pv_cpu_ops);
487EXPORT_SYMBOL (pv_mmu_ops);
488EXPORT_SYMBOL_GPL(pv_apic_ops);
489EXPORT_SYMBOL_GPL(pv_info);
490EXPORT_SYMBOL (pv_irq_ops);
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);