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Rusty Russelld3561b72006-12-07 02:14:07 +01001#ifndef __ASM_PARAVIRT_H
2#define __ASM_PARAVIRT_H
3/* Various instructions on x86 need to be replaced for
4 * para-virtualization: those hooks are defined here. */
Jeremy Fitzhardingeb239fb22007-05-02 19:27:13 +02005
6#ifdef CONFIG_PARAVIRT
Rusty Russellda181a82006-12-07 02:14:08 +01007#include <asm/page.h>
Glauber de Oliveira Costa658be9d2008-01-30 13:32:06 +01008#include <asm/asm.h>
Rusty Russelld3561b72006-12-07 02:14:07 +01009
Rusty Russell139ec7c2006-12-07 02:14:08 +010010/* Bitmask of what can be clobbered: usually at least eax. */
Glauber de Oliveira Costa21438f72008-01-30 13:32:09 +010011#define CLBR_NONE 0
12#define CLBR_EAX (1 << 0)
13#define CLBR_ECX (1 << 1)
14#define CLBR_EDX (1 << 2)
15
16#ifdef CONFIG_X86_64
17#define CLBR_RSI (1 << 3)
18#define CLBR_RDI (1 << 4)
19#define CLBR_R8 (1 << 5)
20#define CLBR_R9 (1 << 6)
21#define CLBR_R10 (1 << 7)
22#define CLBR_R11 (1 << 8)
23#define CLBR_ANY ((1 << 9) - 1)
24#include <asm/desc_defs.h>
25#else
26/* CLBR_ANY should match all regs platform has. For i386, that's just it */
27#define CLBR_ANY ((1 << 3) - 1)
28#endif /* X86_64 */
Rusty Russell139ec7c2006-12-07 02:14:08 +010029
Rusty Russelld3561b72006-12-07 02:14:07 +010030#ifndef __ASSEMBLY__
Jeremy Fitzhardinge3dc494e2007-05-02 19:27:13 +020031#include <linux/types.h>
Jeremy Fitzhardinged4c10472007-05-02 19:27:15 +020032#include <linux/cpumask.h>
Jeremy Fitzhardingece6234b2007-05-02 19:27:15 +020033#include <asm/kmap_types.h>
Glauber de Oliveira Costa8d947342008-01-30 13:31:12 +010034#include <asm/desc_defs.h>
Jeremy Fitzhardinge3dc494e2007-05-02 19:27:13 +020035
Jeremy Fitzhardingece6234b2007-05-02 19:27:15 +020036struct page;
Rusty Russelld3561b72006-12-07 02:14:07 +010037struct thread_struct;
Glauber de Oliveira Costa6b68f012008-01-30 13:31:12 +010038struct desc_ptr;
Rusty Russelld3561b72006-12-07 02:14:07 +010039struct tss_struct;
Rusty Russellda181a82006-12-07 02:14:08 +010040struct mm_struct;
Rusty Russell90a0a062007-05-02 19:27:10 +020041struct desc_struct;
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +020042
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -070043/* general info */
44struct pv_info {
Rusty Russelld3561b72006-12-07 02:14:07 +010045 unsigned int kernel_rpl;
Jeremy Fitzhardinge5311ab62007-05-02 19:27:13 +020046 int shared_kernel_pmd;
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -070047 int paravirt_enabled;
Rusty Russelld3561b72006-12-07 02:14:07 +010048 const char *name;
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -070049};
Rusty Russelld3561b72006-12-07 02:14:07 +010050
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -070051struct pv_init_ops {
Rusty Russell139ec7c2006-12-07 02:14:08 +010052 /*
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -070053 * Patch may replace one of the defined code sequences with
54 * arbitrary code, subject to the same register constraints.
55 * This generally means the code is not free to clobber any
56 * registers other than EAX. The patch function should return
57 * the number of bytes of code generated, as we nop pad the
58 * rest in generic code.
Rusty Russell139ec7c2006-12-07 02:14:08 +010059 */
Andi Kleenab144f52007-08-10 22:31:03 +020060 unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
61 unsigned long addr, unsigned len);
Rusty Russell139ec7c2006-12-07 02:14:08 +010062
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +020063 /* Basic arch-specific setup */
Rusty Russelld3561b72006-12-07 02:14:07 +010064 void (*arch_setup)(void);
65 char *(*memory_setup)(void);
Jeremy Fitzhardinge6996d3b2007-07-17 18:37:03 -070066 void (*post_allocator_init)(void);
67
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +020068 /* Print a banner to identify the environment */
Rusty Russelld3561b72006-12-07 02:14:07 +010069 void (*banner)(void);
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -070070};
71
72
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -070073struct pv_lazy_ops {
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -070074 /* Set deferred update mode, used for batching operations. */
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -070075 void (*enter)(void);
76 void (*leave)(void);
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -070077};
78
79struct pv_time_ops {
80 void (*time_init)(void);
Rusty Russelld3561b72006-12-07 02:14:07 +010081
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +020082 /* Set and set time of day */
Rusty Russelld3561b72006-12-07 02:14:07 +010083 unsigned long (*get_wallclock)(void);
84 int (*set_wallclock)(unsigned long);
Rusty Russelld3561b72006-12-07 02:14:07 +010085
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -070086 unsigned long long (*sched_clock)(void);
87 unsigned long (*get_cpu_khz)(void);
88};
Rusty Russelld3561b72006-12-07 02:14:07 +010089
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -070090struct pv_cpu_ops {
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +020091 /* hooks for various privileged instructions */
Andi Kleen1a1eecd2007-02-13 13:26:25 +010092 unsigned long (*get_debugreg)(int regno);
93 void (*set_debugreg)(int regno, unsigned long value);
Rusty Russelld3561b72006-12-07 02:14:07 +010094
Andi Kleen1a1eecd2007-02-13 13:26:25 +010095 void (*clts)(void);
Rusty Russelld3561b72006-12-07 02:14:07 +010096
Andi Kleen1a1eecd2007-02-13 13:26:25 +010097 unsigned long (*read_cr0)(void);
98 void (*write_cr0)(unsigned long);
Rusty Russelld3561b72006-12-07 02:14:07 +010099
Andi Kleen1a1eecd2007-02-13 13:26:25 +0100100 unsigned long (*read_cr4_safe)(void);
101 unsigned long (*read_cr4)(void);
102 void (*write_cr4)(unsigned long);
Rusty Russelld3561b72006-12-07 02:14:07 +0100103
Glauber de Oliveira Costa4c9890c2008-01-30 13:33:19 +0100104#ifdef CONFIG_X86_64
105 unsigned long (*read_cr8)(void);
106 void (*write_cr8)(unsigned long);
107#endif
108
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200109 /* Segment descriptor handling */
Andi Kleen1a1eecd2007-02-13 13:26:25 +0100110 void (*load_tr_desc)(void);
Glauber de Oliveira Costa6b68f012008-01-30 13:31:12 +0100111 void (*load_gdt)(const struct desc_ptr *);
112 void (*load_idt)(const struct desc_ptr *);
113 void (*store_gdt)(struct desc_ptr *);
114 void (*store_idt)(struct desc_ptr *);
Andi Kleen1a1eecd2007-02-13 13:26:25 +0100115 void (*set_ldt)(const void *desc, unsigned entries);
116 unsigned long (*store_tr)(void);
117 void (*load_tls)(struct thread_struct *t, unsigned int cpu);
Glauber de Oliveira Costa75b8bb32008-01-30 13:31:13 +0100118 void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
119 const void *desc);
Rusty Russell90a0a062007-05-02 19:27:10 +0200120 void (*write_gdt_entry)(struct desc_struct *,
Glauber de Oliveira Costa014b15b2008-01-30 13:31:13 +0100121 int entrynum, const void *desc, int size);
Glauber de Oliveira Costa8d947342008-01-30 13:31:12 +0100122 void (*write_idt_entry)(gate_desc *,
123 int entrynum, const gate_desc *gate);
H. Peter Anvinfaca6222008-01-30 13:31:02 +0100124 void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t);
Rusty Russelld3561b72006-12-07 02:14:07 +0100125
Andi Kleen1a1eecd2007-02-13 13:26:25 +0100126 void (*set_iopl_mask)(unsigned mask);
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700127
128 void (*wbinvd)(void);
Andi Kleen1a1eecd2007-02-13 13:26:25 +0100129 void (*io_delay)(void);
Rusty Russelld3561b72006-12-07 02:14:07 +0100130
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700131 /* cpuid emulation, mostly so that caps bits can be disabled */
132 void (*cpuid)(unsigned int *eax, unsigned int *ebx,
133 unsigned int *ecx, unsigned int *edx);
Jeremy Fitzhardinged6dd61c2007-05-02 19:27:14 +0200134
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700135 /* MSR, PMC and TSR operations.
136 err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
137 u64 (*read_msr)(unsigned int msr, int *err);
Glauber de Oliveira Costac9dcda52008-01-30 13:31:07 +0100138 int (*write_msr)(unsigned int msr, unsigned low, unsigned high);
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700139
140 u64 (*read_tsc)(void);
Glauber de Oliveira Costab8d1fae2008-01-30 13:31:07 +0100141 u64 (*read_pmc)(int counter);
Glauber de Oliveira Costae5aaac42008-01-30 13:32:05 +0100142 unsigned long long (*read_tscp)(unsigned int *aux);
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700143
144 /* These two are jmp to, not actually called. */
Glauber de Oliveira Costa6abcd982008-01-30 13:30:33 +0100145 void (*irq_enable_syscall_ret)(void);
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700146 void (*iret)(void);
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -0700147
Glauber de Oliveira Costae801f862008-01-30 13:32:08 +0100148 void (*swapgs)(void);
149
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -0700150 struct pv_lazy_ops lazy_mode;
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700151};
152
153struct pv_irq_ops {
154 void (*init_IRQ)(void);
155
156 /*
157 * Get/set interrupt state. save_fl and restore_fl are only
158 * expected to use X86_EFLAGS_IF; all other bits
159 * returned from save_fl are undefined, and may be ignored by
160 * restore_fl.
161 */
162 unsigned long (*save_fl)(void);
163 void (*restore_fl)(unsigned long);
164 void (*irq_disable)(void);
165 void (*irq_enable)(void);
166 void (*safe_halt)(void);
167 void (*halt)(void);
168};
169
170struct pv_apic_ops {
Rusty Russell13623d72006-12-07 02:14:08 +0100171#ifdef CONFIG_X86_LOCAL_APIC
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200172 /*
173 * Direct APIC operations, principally for VMI. Ideally
174 * these shouldn't be in this interface.
175 */
Thomas Gleixner42e0a9aa2008-01-30 13:30:15 +0100176 void (*apic_write)(unsigned long reg, u32 v);
177 void (*apic_write_atomic)(unsigned long reg, u32 v);
178 u32 (*apic_read)(unsigned long reg);
Zachary Amsdenbbab4f32007-02-13 13:26:21 +0100179 void (*setup_boot_clock)(void);
180 void (*setup_secondary_clock)(void);
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200181
182 void (*startup_ipi_hook)(int phys_apicid,
183 unsigned long start_eip,
184 unsigned long start_esp);
Rusty Russell13623d72006-12-07 02:14:08 +0100185#endif
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700186};
187
188struct pv_mmu_ops {
189 /*
190 * Called before/after init_mm pagetable setup. setup_start
191 * may reset %cr3, and may pre-install parts of the pagetable;
192 * pagetable setup is expected to preserve any existing
193 * mapping.
194 */
195 void (*pagetable_setup_start)(pgd_t *pgd_base);
196 void (*pagetable_setup_done)(pgd_t *pgd_base);
197
198 unsigned long (*read_cr2)(void);
199 void (*write_cr2)(unsigned long);
200
201 unsigned long (*read_cr3)(void);
202 void (*write_cr3)(unsigned long);
203
204 /*
205 * Hooks for intercepting the creation/use/destruction of an
206 * mm_struct.
207 */
208 void (*activate_mm)(struct mm_struct *prev,
209 struct mm_struct *next);
210 void (*dup_mmap)(struct mm_struct *oldmm,
211 struct mm_struct *mm);
212 void (*exit_mmap)(struct mm_struct *mm);
213
Rusty Russell13623d72006-12-07 02:14:08 +0100214
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200215 /* TLB operations */
Andi Kleen1a1eecd2007-02-13 13:26:25 +0100216 void (*flush_tlb_user)(void);
217 void (*flush_tlb_kernel)(void);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200218 void (*flush_tlb_single)(unsigned long addr);
Jeremy Fitzhardinged4c10472007-05-02 19:27:15 +0200219 void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm,
220 unsigned long va);
Rusty Russellda181a82006-12-07 02:14:08 +0100221
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200222 /* Hooks for allocating/releasing pagetable pages */
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700223 void (*alloc_pte)(struct mm_struct *mm, u32 pfn);
224 void (*alloc_pmd)(struct mm_struct *mm, u32 pfn);
225 void (*alloc_pmd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
Jeremy Fitzhardinge2761fa02008-03-17 16:37:02 -0700226 void (*alloc_pud)(struct mm_struct *mm, u32 pfn);
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700227 void (*release_pte)(u32 pfn);
228 void (*release_pmd)(u32 pfn);
Jeremy Fitzhardinge2761fa02008-03-17 16:37:02 -0700229 void (*release_pud)(u32 pfn);
Zachary Amsdenc119ecc2007-02-13 13:26:21 +0100230
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200231 /* Pagetable manipulation functions */
Andi Kleen1a1eecd2007-02-13 13:26:25 +0100232 void (*set_pte)(pte_t *ptep, pte_t pteval);
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200233 void (*set_pte_at)(struct mm_struct *mm, unsigned long addr,
234 pte_t *ptep, pte_t pteval);
Andi Kleen1a1eecd2007-02-13 13:26:25 +0100235 void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval);
Joe Perches49cd7402008-03-23 01:03:00 -0700236 void (*pte_update)(struct mm_struct *mm, unsigned long addr,
237 pte_t *ptep);
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200238 void (*pte_update_defer)(struct mm_struct *mm,
239 unsigned long addr, pte_t *ptep);
Jeremy Fitzhardinge3dc494e2007-05-02 19:27:13 +0200240
Jeremy Fitzhardinge5b8dd1e2008-01-30 13:33:15 +0100241 pteval_t (*pte_val)(pte_t);
242 pte_t (*make_pte)(pteval_t pte);
243
244 pgdval_t (*pgd_val)(pgd_t);
245 pgd_t (*make_pgd)(pgdval_t pgd);
246
247#if PAGETABLE_LEVELS >= 3
Rusty Russellda181a82006-12-07 02:14:08 +0100248#ifdef CONFIG_X86_PAE
Andi Kleen1a1eecd2007-02-13 13:26:25 +0100249 void (*set_pte_atomic)(pte_t *ptep, pte_t pteval);
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700250 void (*set_pte_present)(struct mm_struct *mm, unsigned long addr,
251 pte_t *ptep, pte_t pte);
Joe Perches49cd7402008-03-23 01:03:00 -0700252 void (*pte_clear)(struct mm_struct *mm, unsigned long addr,
253 pte_t *ptep);
Andi Kleen1a1eecd2007-02-13 13:26:25 +0100254 void (*pmd_clear)(pmd_t *pmdp);
Jeremy Fitzhardinge3dc494e2007-05-02 19:27:13 +0200255
Jeremy Fitzhardinge5b8dd1e2008-01-30 13:33:15 +0100256#endif /* CONFIG_X86_PAE */
Jeremy Fitzhardinge3dc494e2007-05-02 19:27:13 +0200257
Jeremy Fitzhardinge5b8dd1e2008-01-30 13:33:15 +0100258 void (*set_pud)(pud_t *pudp, pud_t pudval);
Jeremy Fitzhardinge3dc494e2007-05-02 19:27:13 +0200259
Jeremy Fitzhardinge5b8dd1e2008-01-30 13:33:15 +0100260 pmdval_t (*pmd_val)(pmd_t);
261 pmd_t (*make_pmd)(pmdval_t pmd);
262
263#if PAGETABLE_LEVELS == 4
264 pudval_t (*pud_val)(pud_t);
265 pud_t (*make_pud)(pudval_t pud);
Eduardo Habkost90422192008-01-30 13:33:20 +0100266
267 void (*set_pgd)(pgd_t *pudp, pgd_t pgdval);
Jeremy Fitzhardinge5b8dd1e2008-01-30 13:33:15 +0100268#endif /* PAGETABLE_LEVELS == 4 */
269#endif /* PAGETABLE_LEVELS >= 3 */
Rusty Russellda181a82006-12-07 02:14:08 +0100270
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700271#ifdef CONFIG_HIGHPTE
272 void *(*kmap_atomic_pte)(struct page *page, enum km_type type);
273#endif
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -0700274
275 struct pv_lazy_ops lazy_mode;
Jeremy Fitzhardingeaeaaa592008-06-17 11:42:01 -0700276
277 /* dom0 ops */
278
279 /* Sometimes the physical address is a pfn, and sometimes its
280 an mfn. We can tell which is which from the index. */
281 void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
282 unsigned long phys, pgprot_t flags);
Rusty Russelld3561b72006-12-07 02:14:07 +0100283};
284
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700285/* This contains all the paravirt structures: we get a convenient
286 * number for each function using the offset which we use to indicate
287 * what to patch. */
Joe Perches49cd7402008-03-23 01:03:00 -0700288struct paravirt_patch_template {
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700289 struct pv_init_ops pv_init_ops;
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700290 struct pv_time_ops pv_time_ops;
291 struct pv_cpu_ops pv_cpu_ops;
292 struct pv_irq_ops pv_irq_ops;
293 struct pv_apic_ops pv_apic_ops;
294 struct pv_mmu_ops pv_mmu_ops;
295};
296
297extern struct pv_info pv_info;
298extern struct pv_init_ops pv_init_ops;
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700299extern struct pv_time_ops pv_time_ops;
300extern struct pv_cpu_ops pv_cpu_ops;
301extern struct pv_irq_ops pv_irq_ops;
302extern struct pv_apic_ops pv_apic_ops;
303extern struct pv_mmu_ops pv_mmu_ops;
Rusty Russelld3561b72006-12-07 02:14:07 +0100304
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +0200305#define PARAVIRT_PATCH(x) \
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700306 (offsetof(struct paravirt_patch_template, x) / sizeof(void *))
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +0200307
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700308#define paravirt_type(op) \
309 [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
310 [paravirt_opptr] "m" (op)
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +0200311#define paravirt_clobber(clobber) \
312 [paravirt_clobber] "i" (clobber)
313
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200314/*
315 * Generate some code, and mark it as patchable by the
316 * apply_paravirt() alternate instruction patcher.
317 */
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +0200318#define _paravirt_alt(insn_string, type, clobber) \
319 "771:\n\t" insn_string "\n" "772:\n" \
320 ".pushsection .parainstructions,\"a\"\n" \
Glauber de Oliveira Costa658be9d2008-01-30 13:32:06 +0100321 _ASM_ALIGN "\n" \
322 _ASM_PTR " 771b\n" \
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +0200323 " .byte " type "\n" \
324 " .byte 772b-771b\n" \
325 " .short " clobber "\n" \
326 ".popsection\n"
327
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200328/* Generate patchable code, with the default asm parameters. */
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200329#define paravirt_alt(insn_string) \
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +0200330 _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]")
331
Glauber de Oliveira Costa2f485ef2008-01-30 13:32:10 +0100332/* Simple instruction patching code. */
333#define DEF_NATIVE(ops, name, code) \
334 extern const char start_##ops##_##name[], end_##ops##_##name[]; \
335 asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":")
336
Jeremy Fitzhardinge63f70272007-05-02 19:27:14 +0200337unsigned paravirt_patch_nop(void);
338unsigned paravirt_patch_ignore(unsigned len);
Andi Kleenab144f52007-08-10 22:31:03 +0200339unsigned paravirt_patch_call(void *insnbuf,
340 const void *target, u16 tgt_clobbers,
341 unsigned long addr, u16 site_clobbers,
Jeremy Fitzhardinge63f70272007-05-02 19:27:14 +0200342 unsigned len);
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700343unsigned paravirt_patch_jmp(void *insnbuf, const void *target,
Andi Kleenab144f52007-08-10 22:31:03 +0200344 unsigned long addr, unsigned len);
345unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
346 unsigned long addr, unsigned len);
Jeremy Fitzhardinge63f70272007-05-02 19:27:14 +0200347
Andi Kleenab144f52007-08-10 22:31:03 +0200348unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
Jeremy Fitzhardinge63f70272007-05-02 19:27:14 +0200349 const char *start, const char *end);
350
Glauber de Oliveira Costa2f485ef2008-01-30 13:32:10 +0100351unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
352 unsigned long addr, unsigned len);
353
Jeremy Fitzhardinged5729292007-07-17 18:37:04 -0700354int paravirt_disable_iospace(void);
Jeremy Fitzhardinge63f70272007-05-02 19:27:14 +0200355
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200356/*
357 * This generates an indirect call based on the operation type number.
358 * The type number, computed in PARAVIRT_PATCH, is derived from the
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700359 * offset into the paravirt_patch_template structure, and can therefore be
360 * freely converted back into a structure offset.
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200361 */
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700362#define PARAVIRT_CALL "call *%[paravirt_opptr];"
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200363
364/*
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700365 * These macros are intended to wrap calls through one of the paravirt
366 * ops structs, so that they can be later identified and patched at
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200367 * runtime.
368 *
369 * Normally, a call to a pv_op function is a simple indirect call:
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100370 * (pv_op_struct.operations)(args...).
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200371 *
372 * Unfortunately, this is a relatively slow operation for modern CPUs,
373 * because it cannot necessarily determine what the destination
374 * address is. In this case, the address is a runtime constant, so at
375 * the very least we can patch the call to e a simple direct call, or
376 * ideally, patch an inline implementation into the callsite. (Direct
377 * calls are essentially free, because the call and return addresses
378 * are completely predictable.)
379 *
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100380 * For i386, these macros rely on the standard gcc "regparm(3)" calling
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200381 * convention, in which the first three arguments are placed in %eax,
382 * %edx, %ecx (in that order), and the remaining arguments are placed
383 * on the stack. All caller-save registers (eax,edx,ecx) are expected
384 * to be modified (either clobbered or used for return values).
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100385 * X86_64, on the other hand, already specifies a register-based calling
386 * conventions, returning at %rax, with parameteres going on %rdi, %rsi,
387 * %rdx, and %rcx. Note that for this reason, x86_64 does not need any
388 * special handling for dealing with 4 arguments, unlike i386.
389 * However, x86_64 also have to clobber all caller saved registers, which
390 * unfortunately, are quite a bit (r8 - r11)
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200391 *
392 * The call instruction itself is marked by placing its start address
393 * and size into the .parainstructions section, so that
394 * apply_paravirt() in arch/i386/kernel/alternative.c can do the
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700395 * appropriate patching under the control of the backend pv_init_ops
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200396 * implementation.
397 *
398 * Unfortunately there's no way to get gcc to generate the args setup
399 * for the call, and then allow the call itself to be generated by an
400 * inline asm. Because of this, we must do the complete arg setup and
401 * return value handling from within these macros. This is fairly
402 * cumbersome.
403 *
404 * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments.
405 * It could be extended to more arguments, but there would be little
406 * to be gained from that. For each number of arguments, there are
407 * the two VCALL and CALL variants for void and non-void functions.
408 *
409 * When there is a return value, the invoker of the macro must specify
410 * the return type. The macro then uses sizeof() on that type to
411 * determine whether its a 32 or 64 bit value, and places the return
412 * in the right register(s) (just %eax for 32-bit, and %edx:%eax for
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100413 * 64-bit). For x86_64 machines, it just returns at %rax regardless of
414 * the return value size.
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200415 *
416 * 64-bit arguments are passed as a pair of adjacent 32-bit arguments
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100417 * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments
418 * in low,high order
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +0200419 *
420 * Small structures are passed and returned in registers. The macro
421 * calling convention can't directly deal with this, so the wrapper
422 * functions must do this.
423 *
424 * These PVOP_* macros are only defined within this header. This
425 * means that all uses must be wrapped in inline functions. This also
426 * makes sure the incoming and outgoing types are always correct.
427 */
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100428#ifdef CONFIG_X86_32
429#define PVOP_VCALL_ARGS unsigned long __eax, __edx, __ecx
430#define PVOP_CALL_ARGS PVOP_VCALL_ARGS
431#define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \
432 "=c" (__ecx)
433#define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS
434#define EXTRA_CLOBBERS
435#define VEXTRA_CLOBBERS
436#else
437#define PVOP_VCALL_ARGS unsigned long __edi, __esi, __edx, __ecx
438#define PVOP_CALL_ARGS PVOP_VCALL_ARGS, __eax
439#define PVOP_VCALL_CLOBBERS "=D" (__edi), \
440 "=S" (__esi), "=d" (__edx), \
441 "=c" (__ecx)
442
443#define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax)
444
445#define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11"
446#define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11"
447#endif
448
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200449#define __PVOP_CALL(rettype, op, pre, post, ...) \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200450 ({ \
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200451 rettype __ret; \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100452 PVOP_CALL_ARGS; \
453 /* This is 32-bit specific, but is okay in 64-bit */ \
454 /* since this condition will never hold */ \
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200455 if (sizeof(rettype) > sizeof(unsigned long)) { \
456 asm volatile(pre \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200457 paravirt_alt(PARAVIRT_CALL) \
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200458 post \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100459 : PVOP_CALL_CLOBBERS \
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200460 : paravirt_type(op), \
461 paravirt_clobber(CLBR_ANY), \
462 ##__VA_ARGS__ \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100463 : "memory", "cc" EXTRA_CLOBBERS); \
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200464 __ret = (rettype)((((u64)__edx) << 32) | __eax); \
465 } else { \
466 asm volatile(pre \
467 paravirt_alt(PARAVIRT_CALL) \
468 post \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100469 : PVOP_CALL_CLOBBERS \
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200470 : paravirt_type(op), \
471 paravirt_clobber(CLBR_ANY), \
472 ##__VA_ARGS__ \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100473 : "memory", "cc" EXTRA_CLOBBERS); \
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200474 __ret = (rettype)__eax; \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200475 } \
476 __ret; \
477 })
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200478#define __PVOP_VCALL(op, pre, post, ...) \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200479 ({ \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100480 PVOP_VCALL_ARGS; \
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200481 asm volatile(pre \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200482 paravirt_alt(PARAVIRT_CALL) \
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200483 post \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100484 : PVOP_VCALL_CLOBBERS \
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200485 : paravirt_type(op), \
486 paravirt_clobber(CLBR_ANY), \
487 ##__VA_ARGS__ \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100488 : "memory", "cc" VEXTRA_CLOBBERS); \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200489 })
490
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200491#define PVOP_CALL0(rettype, op) \
492 __PVOP_CALL(rettype, op, "", "")
493#define PVOP_VCALL0(op) \
494 __PVOP_VCALL(op, "", "")
495
496#define PVOP_CALL1(rettype, op, arg1) \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100497 __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)))
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200498#define PVOP_VCALL1(op, arg1) \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100499 __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)))
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200500
501#define PVOP_CALL2(rettype, op, arg1, arg2) \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100502 __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)), \
503 "1" ((unsigned long)(arg2)))
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200504#define PVOP_VCALL2(op, arg1, arg2) \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100505 __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)), \
506 "1" ((unsigned long)(arg2)))
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200507
508#define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100509 __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)), \
510 "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)))
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200511#define PVOP_VCALL3(op, arg1, arg2, arg3) \
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100512 __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)), \
513 "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)))
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200514
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100515/* This is the only difference in x86_64. We can make it much simpler */
516#ifdef CONFIG_X86_32
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200517#define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
518 __PVOP_CALL(rettype, op, \
519 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
520 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
521 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
522#define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
523 __PVOP_VCALL(op, \
524 "push %[_arg4];", "lea 4(%%esp),%%esp;", \
525 "0" ((u32)(arg1)), "1" ((u32)(arg2)), \
526 "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4)))
Glauber de Oliveira Costaa4746362008-01-30 13:32:05 +0100527#else
528#define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \
529 __PVOP_CALL(rettype, op, "", "", "0" ((unsigned long)(arg1)), \
530 "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)), \
531 "3"((unsigned long)(arg4)))
532#define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \
533 __PVOP_VCALL(op, "", "", "0" ((unsigned long)(arg1)), \
534 "1"((unsigned long)(arg2)), "2"((unsigned long)(arg3)), \
535 "3"((unsigned long)(arg4)))
536#endif
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +0200537
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200538static inline int paravirt_enabled(void)
539{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700540 return pv_info.paravirt_enabled;
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200541}
Rusty Russelld3561b72006-12-07 02:14:07 +0100542
H. Peter Anvinfaca6222008-01-30 13:31:02 +0100543static inline void load_sp0(struct tss_struct *tss,
Rusty Russelld3561b72006-12-07 02:14:07 +0100544 struct thread_struct *thread)
545{
H. Peter Anvinfaca6222008-01-30 13:31:02 +0100546 PVOP_VCALL2(pv_cpu_ops.load_sp0, tss, thread);
Rusty Russelld3561b72006-12-07 02:14:07 +0100547}
548
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700549#define ARCH_SETUP pv_init_ops.arch_setup();
Rusty Russelld3561b72006-12-07 02:14:07 +0100550static inline unsigned long get_wallclock(void)
551{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700552 return PVOP_CALL0(unsigned long, pv_time_ops.get_wallclock);
Rusty Russelld3561b72006-12-07 02:14:07 +0100553}
554
555static inline int set_wallclock(unsigned long nowtime)
556{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700557 return PVOP_CALL1(int, pv_time_ops.set_wallclock, nowtime);
Rusty Russelld3561b72006-12-07 02:14:07 +0100558}
559
Zachary Amsdene30fab32007-03-05 00:30:39 -0800560static inline void (*choose_time_init(void))(void)
Rusty Russelld3561b72006-12-07 02:14:07 +0100561{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700562 return pv_time_ops.time_init;
Rusty Russelld3561b72006-12-07 02:14:07 +0100563}
564
565/* The paravirtualized CPUID instruction. */
566static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
567 unsigned int *ecx, unsigned int *edx)
568{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700569 PVOP_VCALL4(pv_cpu_ops.cpuid, eax, ebx, ecx, edx);
Rusty Russelld3561b72006-12-07 02:14:07 +0100570}
571
572/*
573 * These special macros can be used to get or set a debugging register
574 */
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200575static inline unsigned long paravirt_get_debugreg(int reg)
576{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700577 return PVOP_CALL1(unsigned long, pv_cpu_ops.get_debugreg, reg);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200578}
579#define get_debugreg(var, reg) var = paravirt_get_debugreg(reg)
580static inline void set_debugreg(unsigned long val, int reg)
581{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700582 PVOP_VCALL2(pv_cpu_ops.set_debugreg, reg, val);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200583}
Rusty Russelld3561b72006-12-07 02:14:07 +0100584
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200585static inline void clts(void)
586{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700587 PVOP_VCALL0(pv_cpu_ops.clts);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200588}
Rusty Russelld3561b72006-12-07 02:14:07 +0100589
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200590static inline unsigned long read_cr0(void)
591{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700592 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr0);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200593}
Rusty Russelld3561b72006-12-07 02:14:07 +0100594
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200595static inline void write_cr0(unsigned long x)
596{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700597 PVOP_VCALL1(pv_cpu_ops.write_cr0, x);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200598}
Rusty Russelld3561b72006-12-07 02:14:07 +0100599
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200600static inline unsigned long read_cr2(void)
601{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700602 return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr2);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200603}
Rusty Russelld3561b72006-12-07 02:14:07 +0100604
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200605static inline void write_cr2(unsigned long x)
606{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700607 PVOP_VCALL1(pv_mmu_ops.write_cr2, x);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200608}
Rusty Russelld3561b72006-12-07 02:14:07 +0100609
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200610static inline unsigned long read_cr3(void)
611{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700612 return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr3);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200613}
614
615static inline void write_cr3(unsigned long x)
616{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700617 PVOP_VCALL1(pv_mmu_ops.write_cr3, x);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200618}
619
620static inline unsigned long read_cr4(void)
621{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700622 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200623}
624static inline unsigned long read_cr4_safe(void)
625{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700626 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr4_safe);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200627}
628
629static inline void write_cr4(unsigned long x)
630{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700631 PVOP_VCALL1(pv_cpu_ops.write_cr4, x);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200632}
Jeremy Fitzhardinge3dc494e2007-05-02 19:27:13 +0200633
Glauber de Oliveira Costa94ea03c2008-01-30 13:33:19 +0100634#ifdef CONFIG_X86_64
Glauber de Oliveira Costa4c9890c2008-01-30 13:33:19 +0100635static inline unsigned long read_cr8(void)
636{
637 return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8);
638}
639
640static inline void write_cr8(unsigned long x)
641{
642 PVOP_VCALL1(pv_cpu_ops.write_cr8, x);
643}
Glauber de Oliveira Costa94ea03c2008-01-30 13:33:19 +0100644#endif
Glauber de Oliveira Costa4c9890c2008-01-30 13:33:19 +0100645
Rusty Russelld3561b72006-12-07 02:14:07 +0100646static inline void raw_safe_halt(void)
647{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700648 PVOP_VCALL0(pv_irq_ops.safe_halt);
Rusty Russelld3561b72006-12-07 02:14:07 +0100649}
650
651static inline void halt(void)
652{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700653 PVOP_VCALL0(pv_irq_ops.safe_halt);
Rusty Russelld3561b72006-12-07 02:14:07 +0100654}
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200655
656static inline void wbinvd(void)
657{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700658 PVOP_VCALL0(pv_cpu_ops.wbinvd);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200659}
Rusty Russelld3561b72006-12-07 02:14:07 +0100660
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700661#define get_kernel_rpl() (pv_info.kernel_rpl)
Rusty Russelld3561b72006-12-07 02:14:07 +0100662
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200663static inline u64 paravirt_read_msr(unsigned msr, int *err)
664{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700665 return PVOP_CALL2(u64, pv_cpu_ops.read_msr, msr, err);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200666}
667static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
668{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700669 return PVOP_CALL3(int, pv_cpu_ops.write_msr, msr, low, high);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200670}
671
Rusty Russell90a0a062007-05-02 19:27:10 +0200672/* These should all do BUG_ON(_err), but our headers are too tangled. */
Joe Perches49cd7402008-03-23 01:03:00 -0700673#define rdmsr(msr, val1, val2) \
674do { \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200675 int _err; \
676 u64 _l = paravirt_read_msr(msr, &_err); \
677 val1 = (u32)_l; \
678 val2 = _l >> 32; \
Joe Perches49cd7402008-03-23 01:03:00 -0700679} while (0)
Rusty Russelld3561b72006-12-07 02:14:07 +0100680
Joe Perches49cd7402008-03-23 01:03:00 -0700681#define wrmsr(msr, val1, val2) \
682do { \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200683 paravirt_write_msr(msr, val1, val2); \
Joe Perches49cd7402008-03-23 01:03:00 -0700684} while (0)
Rusty Russelld3561b72006-12-07 02:14:07 +0100685
Joe Perches49cd7402008-03-23 01:03:00 -0700686#define rdmsrl(msr, val) \
687do { \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200688 int _err; \
689 val = paravirt_read_msr(msr, &_err); \
Joe Perches49cd7402008-03-23 01:03:00 -0700690} while (0)
Rusty Russelld3561b72006-12-07 02:14:07 +0100691
Joe Perches49cd7402008-03-23 01:03:00 -0700692#define wrmsrl(msr, val) wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32)
693#define wrmsr_safe(msr, a, b) paravirt_write_msr(msr, a, b)
Rusty Russelld3561b72006-12-07 02:14:07 +0100694
695/* rdmsr with exception handling */
Joe Perches49cd7402008-03-23 01:03:00 -0700696#define rdmsr_safe(msr, a, b) \
697({ \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200698 int _err; \
699 u64 _l = paravirt_read_msr(msr, &_err); \
700 (*a) = (u32)_l; \
701 (*b) = _l >> 32; \
Joe Perches49cd7402008-03-23 01:03:00 -0700702 _err; \
703})
Rusty Russelld3561b72006-12-07 02:14:07 +0100704
Andi Kleen1de87bd2008-03-22 10:59:28 +0100705static inline int rdmsrl_safe(unsigned msr, unsigned long long *p)
706{
707 int err;
708
709 *p = paravirt_read_msr(msr, &err);
710 return err;
711}
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200712
713static inline u64 paravirt_read_tsc(void)
714{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700715 return PVOP_CALL0(u64, pv_cpu_ops.read_tsc);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200716}
Rusty Russelld3561b72006-12-07 02:14:07 +0100717
Joe Perches49cd7402008-03-23 01:03:00 -0700718#define rdtscl(low) \
719do { \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200720 u64 _l = paravirt_read_tsc(); \
721 low = (int)_l; \
Joe Perches49cd7402008-03-23 01:03:00 -0700722} while (0)
Rusty Russelld3561b72006-12-07 02:14:07 +0100723
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200724#define rdtscll(val) (val = paravirt_read_tsc())
Rusty Russelld3561b72006-12-07 02:14:07 +0100725
Jeremy Fitzhardinge688340e2007-07-17 18:37:04 -0700726static inline unsigned long long paravirt_sched_clock(void)
727{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700728 return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock);
Jeremy Fitzhardinge688340e2007-07-17 18:37:04 -0700729}
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700730#define calculate_cpu_khz() (pv_time_ops.get_cpu_khz())
Zachary Amsden6cb9a832007-03-05 00:30:35 -0800731
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200732static inline unsigned long long paravirt_read_pmc(int counter)
733{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700734 return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200735}
736
Joe Perches49cd7402008-03-23 01:03:00 -0700737#define rdpmc(counter, low, high) \
738do { \
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200739 u64 _l = paravirt_read_pmc(counter); \
740 low = (u32)_l; \
741 high = _l >> 32; \
Joe Perches49cd7402008-03-23 01:03:00 -0700742} while (0)
Rusty Russelld3561b72006-12-07 02:14:07 +0100743
Glauber de Oliveira Costae5aaac42008-01-30 13:32:05 +0100744static inline unsigned long long paravirt_rdtscp(unsigned int *aux)
745{
746 return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux);
747}
748
749#define rdtscp(low, high, aux) \
750do { \
751 int __aux; \
752 unsigned long __val = paravirt_rdtscp(&__aux); \
753 (low) = (u32)__val; \
754 (high) = (u32)(__val >> 32); \
755 (aux) = __aux; \
756} while (0)
757
758#define rdtscpll(val, aux) \
759do { \
760 unsigned long __aux; \
761 val = paravirt_rdtscp(&__aux); \
762 (aux) = __aux; \
763} while (0)
764
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200765static inline void load_TR_desc(void)
766{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700767 PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200768}
Glauber de Oliveira Costa6b68f012008-01-30 13:31:12 +0100769static inline void load_gdt(const struct desc_ptr *dtr)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200770{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700771 PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200772}
Glauber de Oliveira Costa6b68f012008-01-30 13:31:12 +0100773static inline void load_idt(const struct desc_ptr *dtr)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200774{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700775 PVOP_VCALL1(pv_cpu_ops.load_idt, dtr);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200776}
777static inline void set_ldt(const void *addr, unsigned entries)
778{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700779 PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200780}
Glauber de Oliveira Costa6b68f012008-01-30 13:31:12 +0100781static inline void store_gdt(struct desc_ptr *dtr)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200782{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700783 PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200784}
Glauber de Oliveira Costa6b68f012008-01-30 13:31:12 +0100785static inline void store_idt(struct desc_ptr *dtr)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200786{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700787 PVOP_VCALL1(pv_cpu_ops.store_idt, dtr);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200788}
789static inline unsigned long paravirt_store_tr(void)
790{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700791 return PVOP_CALL0(unsigned long, pv_cpu_ops.store_tr);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200792}
793#define store_tr(tr) ((tr) = paravirt_store_tr())
794static inline void load_TLS(struct thread_struct *t, unsigned cpu)
795{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700796 PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200797}
Glauber de Oliveira Costa75b8bb32008-01-30 13:31:13 +0100798
799static inline void write_ldt_entry(struct desc_struct *dt, int entry,
800 const void *desc)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200801{
Glauber de Oliveira Costa75b8bb32008-01-30 13:31:13 +0100802 PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200803}
Glauber de Oliveira Costa014b15b2008-01-30 13:31:13 +0100804
805static inline void write_gdt_entry(struct desc_struct *dt, int entry,
806 void *desc, int type)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200807{
Glauber de Oliveira Costa014b15b2008-01-30 13:31:13 +0100808 PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200809}
Glauber de Oliveira Costa014b15b2008-01-30 13:31:13 +0100810
Glauber de Oliveira Costa8d947342008-01-30 13:31:12 +0100811static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200812{
Glauber de Oliveira Costa8d947342008-01-30 13:31:12 +0100813 PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200814}
815static inline void set_iopl_mask(unsigned mask)
816{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700817 PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200818}
Jeremy Fitzhardinge3dc494e2007-05-02 19:27:13 +0200819
Rusty Russelld3561b72006-12-07 02:14:07 +0100820/* The paravirtualized I/O functions */
Joe Perches49cd7402008-03-23 01:03:00 -0700821static inline void slow_down_io(void)
822{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700823 pv_cpu_ops.io_delay();
Rusty Russelld3561b72006-12-07 02:14:07 +0100824#ifdef REALLY_SLOW_IO
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700825 pv_cpu_ops.io_delay();
826 pv_cpu_ops.io_delay();
827 pv_cpu_ops.io_delay();
Rusty Russelld3561b72006-12-07 02:14:07 +0100828#endif
829}
830
Rusty Russell13623d72006-12-07 02:14:08 +0100831#ifdef CONFIG_X86_LOCAL_APIC
832/*
833 * Basic functions accessing APICs.
834 */
Thomas Gleixner42e0a9aa2008-01-30 13:30:15 +0100835static inline void apic_write(unsigned long reg, u32 v)
Rusty Russell13623d72006-12-07 02:14:08 +0100836{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700837 PVOP_VCALL2(pv_apic_ops.apic_write, reg, v);
Rusty Russell13623d72006-12-07 02:14:08 +0100838}
839
Thomas Gleixner42e0a9aa2008-01-30 13:30:15 +0100840static inline void apic_write_atomic(unsigned long reg, u32 v)
Rusty Russell13623d72006-12-07 02:14:08 +0100841{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700842 PVOP_VCALL2(pv_apic_ops.apic_write_atomic, reg, v);
Rusty Russell13623d72006-12-07 02:14:08 +0100843}
844
Thomas Gleixner42e0a9aa2008-01-30 13:30:15 +0100845static inline u32 apic_read(unsigned long reg)
Rusty Russell13623d72006-12-07 02:14:08 +0100846{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700847 return PVOP_CALL1(unsigned long, pv_apic_ops.apic_read, reg);
Rusty Russell13623d72006-12-07 02:14:08 +0100848}
Zachary Amsdenbbab4f32007-02-13 13:26:21 +0100849
850static inline void setup_boot_clock(void)
851{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700852 PVOP_VCALL0(pv_apic_ops.setup_boot_clock);
Zachary Amsdenbbab4f32007-02-13 13:26:21 +0100853}
854
855static inline void setup_secondary_clock(void)
856{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700857 PVOP_VCALL0(pv_apic_ops.setup_secondary_clock);
Zachary Amsdenbbab4f32007-02-13 13:26:21 +0100858}
Rusty Russell13623d72006-12-07 02:14:08 +0100859#endif
860
Jeremy Fitzhardinge6996d3b2007-07-17 18:37:03 -0700861static inline void paravirt_post_allocator_init(void)
862{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700863 if (pv_init_ops.post_allocator_init)
864 (*pv_init_ops.post_allocator_init)();
Jeremy Fitzhardinge6996d3b2007-07-17 18:37:03 -0700865}
866
Jeremy Fitzhardingeb239fb22007-05-02 19:27:13 +0200867static inline void paravirt_pagetable_setup_start(pgd_t *base)
868{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700869 (*pv_mmu_ops.pagetable_setup_start)(base);
Jeremy Fitzhardingeb239fb22007-05-02 19:27:13 +0200870}
871
872static inline void paravirt_pagetable_setup_done(pgd_t *base)
873{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700874 (*pv_mmu_ops.pagetable_setup_done)(base);
Jeremy Fitzhardingeb239fb22007-05-02 19:27:13 +0200875}
Jeremy Fitzhardinge3dc494e2007-05-02 19:27:13 +0200876
Zachary Amsdenae5da272007-02-13 13:26:21 +0100877#ifdef CONFIG_SMP
878static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
879 unsigned long start_esp)
880{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700881 PVOP_VCALL3(pv_apic_ops.startup_ipi_hook,
882 phys_apicid, start_eip, start_esp);
Zachary Amsdenae5da272007-02-13 13:26:21 +0100883}
884#endif
Rusty Russell13623d72006-12-07 02:14:08 +0100885
Jeremy Fitzhardinged6dd61c2007-05-02 19:27:14 +0200886static inline void paravirt_activate_mm(struct mm_struct *prev,
887 struct mm_struct *next)
888{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700889 PVOP_VCALL2(pv_mmu_ops.activate_mm, prev, next);
Jeremy Fitzhardinged6dd61c2007-05-02 19:27:14 +0200890}
891
892static inline void arch_dup_mmap(struct mm_struct *oldmm,
893 struct mm_struct *mm)
894{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700895 PVOP_VCALL2(pv_mmu_ops.dup_mmap, oldmm, mm);
Jeremy Fitzhardinged6dd61c2007-05-02 19:27:14 +0200896}
897
898static inline void arch_exit_mmap(struct mm_struct *mm)
899{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700900 PVOP_VCALL1(pv_mmu_ops.exit_mmap, mm);
Jeremy Fitzhardinged6dd61c2007-05-02 19:27:14 +0200901}
902
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200903static inline void __flush_tlb(void)
904{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700905 PVOP_VCALL0(pv_mmu_ops.flush_tlb_user);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200906}
907static inline void __flush_tlb_global(void)
908{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700909 PVOP_VCALL0(pv_mmu_ops.flush_tlb_kernel);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200910}
911static inline void __flush_tlb_single(unsigned long addr)
912{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700913 PVOP_VCALL1(pv_mmu_ops.flush_tlb_single, addr);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200914}
Rusty Russellda181a82006-12-07 02:14:08 +0100915
Jeremy Fitzhardinged4c10472007-05-02 19:27:15 +0200916static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
917 unsigned long va)
918{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700919 PVOP_VCALL3(pv_mmu_ops.flush_tlb_others, &cpumask, mm, va);
Jeremy Fitzhardinged4c10472007-05-02 19:27:15 +0200920}
921
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700922static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned pfn)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200923{
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700924 PVOP_VCALL2(pv_mmu_ops.alloc_pte, mm, pfn);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200925}
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700926static inline void paravirt_release_pte(unsigned pfn)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200927{
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700928 PVOP_VCALL1(pv_mmu_ops.release_pte, pfn);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200929}
Zachary Amsdenc119ecc2007-02-13 13:26:21 +0100930
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700931static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned pfn)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200932{
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700933 PVOP_VCALL2(pv_mmu_ops.alloc_pmd, mm, pfn);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200934}
935
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700936static inline void paravirt_alloc_pmd_clone(unsigned pfn, unsigned clonepfn,
937 unsigned start, unsigned count)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200938{
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700939 PVOP_VCALL4(pv_mmu_ops.alloc_pmd_clone, pfn, clonepfn, start, count);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200940}
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700941static inline void paravirt_release_pmd(unsigned pfn)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200942{
Jeremy Fitzhardinge6944a9c2008-03-17 16:37:01 -0700943 PVOP_VCALL1(pv_mmu_ops.release_pmd, pfn);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200944}
945
Jeremy Fitzhardinge2761fa02008-03-17 16:37:02 -0700946static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned pfn)
947{
948 PVOP_VCALL2(pv_mmu_ops.alloc_pud, mm, pfn);
949}
950static inline void paravirt_release_pud(unsigned pfn)
951{
952 PVOP_VCALL1(pv_mmu_ops.release_pud, pfn);
953}
954
Jeremy Fitzhardingece6234b2007-05-02 19:27:15 +0200955#ifdef CONFIG_HIGHPTE
956static inline void *kmap_atomic_pte(struct page *page, enum km_type type)
957{
958 unsigned long ret;
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700959 ret = PVOP_CALL2(unsigned long, pv_mmu_ops.kmap_atomic_pte, page, type);
Jeremy Fitzhardingece6234b2007-05-02 19:27:15 +0200960 return (void *)ret;
961}
962#endif
963
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200964static inline void pte_update(struct mm_struct *mm, unsigned long addr,
965 pte_t *ptep)
966{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700967 PVOP_VCALL3(pv_mmu_ops.pte_update, mm, addr, ptep);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200968}
969
970static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
971 pte_t *ptep)
972{
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -0700973 PVOP_VCALL3(pv_mmu_ops.pte_update_defer, mm, addr, ptep);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200974}
975
Jeremy Fitzhardinge773221f2008-01-30 13:33:15 +0100976static inline pte_t __pte(pteval_t val)
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200977{
Jeremy Fitzhardinge773221f2008-01-30 13:33:15 +0100978 pteval_t ret;
979
980 if (sizeof(pteval_t) > sizeof(long))
981 ret = PVOP_CALL2(pteval_t,
982 pv_mmu_ops.make_pte,
983 val, (u64)val >> 32);
984 else
985 ret = PVOP_CALL1(pteval_t,
986 pv_mmu_ops.make_pte,
987 val);
988
Jeremy Fitzhardingec8e53932008-01-30 13:32:57 +0100989 return (pte_t) { .pte = ret };
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +0200990}
991
Jeremy Fitzhardinge773221f2008-01-30 13:33:15 +0100992static inline pteval_t pte_val(pte_t pte)
993{
994 pteval_t ret;
995
996 if (sizeof(pteval_t) > sizeof(long))
997 ret = PVOP_CALL2(pteval_t, pv_mmu_ops.pte_val,
998 pte.pte, (u64)pte.pte >> 32);
999 else
1000 ret = PVOP_CALL1(pteval_t, pv_mmu_ops.pte_val,
1001 pte.pte);
1002
1003 return ret;
1004}
1005
Jeremy Fitzhardingeef385032008-01-30 13:33:15 +01001006static inline pgd_t __pgd(pgdval_t val)
1007{
1008 pgdval_t ret;
1009
1010 if (sizeof(pgdval_t) > sizeof(long))
1011 ret = PVOP_CALL2(pgdval_t, pv_mmu_ops.make_pgd,
1012 val, (u64)val >> 32);
1013 else
1014 ret = PVOP_CALL1(pgdval_t, pv_mmu_ops.make_pgd,
1015 val);
1016
1017 return (pgd_t) { ret };
1018}
1019
1020static inline pgdval_t pgd_val(pgd_t pgd)
1021{
1022 pgdval_t ret;
1023
1024 if (sizeof(pgdval_t) > sizeof(long))
1025 ret = PVOP_CALL2(pgdval_t, pv_mmu_ops.pgd_val,
1026 pgd.pgd, (u64)pgd.pgd >> 32);
1027 else
1028 ret = PVOP_CALL1(pgdval_t, pv_mmu_ops.pgd_val,
1029 pgd.pgd);
1030
1031 return ret;
1032}
1033
Jeremy Fitzhardinge4eed80c2008-01-30 13:33:15 +01001034static inline void set_pte(pte_t *ptep, pte_t pte)
1035{
1036 if (sizeof(pteval_t) > sizeof(long))
1037 PVOP_VCALL3(pv_mmu_ops.set_pte, ptep,
1038 pte.pte, (u64)pte.pte >> 32);
1039 else
1040 PVOP_VCALL2(pv_mmu_ops.set_pte, ptep,
1041 pte.pte);
1042}
1043
1044static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
1045 pte_t *ptep, pte_t pte)
1046{
1047 if (sizeof(pteval_t) > sizeof(long))
1048 /* 5 arg words */
1049 pv_mmu_ops.set_pte_at(mm, addr, ptep, pte);
1050 else
1051 PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte);
1052}
1053
Jeremy Fitzhardinge60b3f622008-01-30 13:33:15 +01001054static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
1055{
1056 pmdval_t val = native_pmd_val(pmd);
1057
1058 if (sizeof(pmdval_t) > sizeof(long))
1059 PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp, val, (u64)val >> 32);
1060 else
1061 PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
1062}
1063
Glauber de Oliveira Costa1fe91512008-01-30 13:33:19 +01001064#if PAGETABLE_LEVELS >= 3
1065static inline pmd_t __pmd(pmdval_t val)
1066{
1067 pmdval_t ret;
1068
1069 if (sizeof(pmdval_t) > sizeof(long))
1070 ret = PVOP_CALL2(pmdval_t, pv_mmu_ops.make_pmd,
1071 val, (u64)val >> 32);
1072 else
1073 ret = PVOP_CALL1(pmdval_t, pv_mmu_ops.make_pmd,
1074 val);
1075
1076 return (pmd_t) { ret };
1077}
1078
1079static inline pmdval_t pmd_val(pmd_t pmd)
1080{
1081 pmdval_t ret;
1082
1083 if (sizeof(pmdval_t) > sizeof(long))
1084 ret = PVOP_CALL2(pmdval_t, pv_mmu_ops.pmd_val,
1085 pmd.pmd, (u64)pmd.pmd >> 32);
1086 else
1087 ret = PVOP_CALL1(pmdval_t, pv_mmu_ops.pmd_val,
1088 pmd.pmd);
1089
1090 return ret;
1091}
1092
1093static inline void set_pud(pud_t *pudp, pud_t pud)
1094{
1095 pudval_t val = native_pud_val(pud);
1096
1097 if (sizeof(pudval_t) > sizeof(long))
1098 PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
1099 val, (u64)val >> 32);
1100 else
1101 PVOP_VCALL2(pv_mmu_ops.set_pud, pudp,
1102 val);
1103}
Eduardo Habkost90422192008-01-30 13:33:20 +01001104#if PAGETABLE_LEVELS == 4
1105static inline pud_t __pud(pudval_t val)
1106{
1107 pudval_t ret;
1108
1109 if (sizeof(pudval_t) > sizeof(long))
1110 ret = PVOP_CALL2(pudval_t, pv_mmu_ops.make_pud,
1111 val, (u64)val >> 32);
1112 else
1113 ret = PVOP_CALL1(pudval_t, pv_mmu_ops.make_pud,
1114 val);
1115
1116 return (pud_t) { ret };
1117}
1118
1119static inline pudval_t pud_val(pud_t pud)
1120{
1121 pudval_t ret;
1122
1123 if (sizeof(pudval_t) > sizeof(long))
1124 ret = PVOP_CALL2(pudval_t, pv_mmu_ops.pud_val,
1125 pud.pud, (u64)pud.pud >> 32);
1126 else
1127 ret = PVOP_CALL1(pudval_t, pv_mmu_ops.pud_val,
1128 pud.pud);
1129
1130 return ret;
1131}
1132
1133static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
1134{
1135 pgdval_t val = native_pgd_val(pgd);
1136
1137 if (sizeof(pgdval_t) > sizeof(long))
1138 PVOP_VCALL3(pv_mmu_ops.set_pgd, pgdp,
1139 val, (u64)val >> 32);
1140 else
1141 PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp,
1142 val);
1143}
1144
1145static inline void pgd_clear(pgd_t *pgdp)
1146{
1147 set_pgd(pgdp, __pgd(0));
1148}
1149
1150static inline void pud_clear(pud_t *pudp)
1151{
1152 set_pud(pudp, __pud(0));
1153}
1154
1155#endif /* PAGETABLE_LEVELS == 4 */
1156
Glauber de Oliveira Costa1fe91512008-01-30 13:33:19 +01001157#endif /* PAGETABLE_LEVELS >= 3 */
1158
Jeremy Fitzhardinge4eed80c2008-01-30 13:33:15 +01001159#ifdef CONFIG_X86_PAE
1160/* Special-case pte-setting operations for PAE, which can't update a
1161 64-bit pte atomically */
1162static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
1163{
1164 PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep,
1165 pte.pte, pte.pte >> 32);
1166}
1167
1168static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
1169 pte_t *ptep, pte_t pte)
1170{
1171 /* 5 arg words */
1172 pv_mmu_ops.set_pte_present(mm, addr, ptep, pte);
1173}
1174
1175static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
1176 pte_t *ptep)
1177{
1178 PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep);
1179}
Jeremy Fitzhardinge60b3f622008-01-30 13:33:15 +01001180
1181static inline void pmd_clear(pmd_t *pmdp)
1182{
1183 PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
1184}
Jeremy Fitzhardinge4eed80c2008-01-30 13:33:15 +01001185#else /* !CONFIG_X86_PAE */
1186static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
1187{
1188 set_pte(ptep, pte);
1189}
1190
1191static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
1192 pte_t *ptep, pte_t pte)
1193{
1194 set_pte(ptep, pte);
1195}
1196
1197static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
1198 pte_t *ptep)
1199{
1200 set_pte_at(mm, addr, ptep, __pte(0));
1201}
Jeremy Fitzhardinge60b3f622008-01-30 13:33:15 +01001202
1203static inline void pmd_clear(pmd_t *pmdp)
1204{
1205 set_pmd(pmdp, __pmd(0));
1206}
Jeremy Fitzhardinge4eed80c2008-01-30 13:33:15 +01001207#endif /* CONFIG_X86_PAE */
1208
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -07001209/* Lazy mode for batching updates / context switch */
1210enum paravirt_lazy_mode {
1211 PARAVIRT_LAZY_NONE,
1212 PARAVIRT_LAZY_MMU,
1213 PARAVIRT_LAZY_CPU,
1214};
1215
1216enum paravirt_lazy_mode paravirt_get_lazy_mode(void);
1217void paravirt_enter_lazy_cpu(void);
1218void paravirt_leave_lazy_cpu(void);
1219void paravirt_enter_lazy_mmu(void);
1220void paravirt_leave_lazy_mmu(void);
1221void paravirt_leave_lazy(enum paravirt_lazy_mode mode);
1222
Zachary Amsden9226d122007-02-13 13:26:21 +01001223#define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +02001224static inline void arch_enter_lazy_cpu_mode(void)
1225{
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -07001226 PVOP_VCALL0(pv_cpu_ops.lazy_mode.enter);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +02001227}
1228
1229static inline void arch_leave_lazy_cpu_mode(void)
1230{
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -07001231 PVOP_VCALL0(pv_cpu_ops.lazy_mode.leave);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +02001232}
1233
1234static inline void arch_flush_lazy_cpu_mode(void)
1235{
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -07001236 if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_CPU)) {
1237 arch_leave_lazy_cpu_mode();
1238 arch_enter_lazy_cpu_mode();
1239 }
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +02001240}
1241
Zachary Amsden9226d122007-02-13 13:26:21 +01001242
1243#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +02001244static inline void arch_enter_lazy_mmu_mode(void)
1245{
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -07001246 PVOP_VCALL0(pv_mmu_ops.lazy_mode.enter);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +02001247}
1248
1249static inline void arch_leave_lazy_mmu_mode(void)
1250{
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -07001251 PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave);
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +02001252}
1253
1254static inline void arch_flush_lazy_mmu_mode(void)
1255{
Jeremy Fitzhardinge8965c1c2007-10-16 11:51:29 -07001256 if (unlikely(paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU)) {
1257 arch_leave_lazy_mmu_mode();
1258 arch_enter_lazy_mmu_mode();
1259 }
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +02001260}
Zachary Amsden9226d122007-02-13 13:26:21 +01001261
Jeremy Fitzhardingeaeaaa592008-06-17 11:42:01 -07001262static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
1263 unsigned long phys, pgprot_t flags)
1264{
1265 pv_mmu_ops.set_fixmap(idx, phys, flags);
1266}
1267
Jeremy Fitzhardinge45876232007-05-02 19:27:13 +02001268void _paravirt_nop(void);
1269#define paravirt_nop ((void *)_paravirt_nop)
1270
Rusty Russell139ec7c2006-12-07 02:14:08 +01001271/* These all sit in the .parainstructions section to tell us what to patch. */
Jeremy Fitzhardinge98de0322007-05-02 19:27:14 +02001272struct paravirt_patch_site {
Rusty Russell139ec7c2006-12-07 02:14:08 +01001273 u8 *instr; /* original instructions */
1274 u8 instrtype; /* type of this instruction */
1275 u8 len; /* length of original instruction */
1276 u16 clobbers; /* what registers you may clobber */
1277};
1278
Jeremy Fitzhardinge98de0322007-05-02 19:27:14 +02001279extern struct paravirt_patch_site __parainstructions[],
1280 __parainstructions_end[];
1281
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001282#ifdef CONFIG_X86_32
1283#define PV_SAVE_REGS "pushl %%ecx; pushl %%edx;"
1284#define PV_RESTORE_REGS "popl %%edx; popl %%ecx"
1285#define PV_FLAGS_ARG "0"
1286#define PV_EXTRA_CLOBBERS
1287#define PV_VEXTRA_CLOBBERS
1288#else
1289/* We save some registers, but all of them, that's too much. We clobber all
1290 * caller saved registers but the argument parameter */
1291#define PV_SAVE_REGS "pushq %%rdi;"
1292#define PV_RESTORE_REGS "popq %%rdi;"
1293#define PV_EXTRA_CLOBBERS EXTRA_CLOBBERS, "rcx" , "rdx"
1294#define PV_VEXTRA_CLOBBERS EXTRA_CLOBBERS, "rdi", "rcx" , "rdx"
1295#define PV_FLAGS_ARG "D"
1296#endif
1297
Rusty Russell139ec7c2006-12-07 02:14:08 +01001298static inline unsigned long __raw_local_save_flags(void)
1299{
1300 unsigned long f;
1301
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001302 asm volatile(paravirt_alt(PV_SAVE_REGS
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001303 PARAVIRT_CALL
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001304 PV_RESTORE_REGS)
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001305 : "=a"(f)
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -07001306 : paravirt_type(pv_irq_ops.save_fl),
Jeremy Fitzhardinge42c24fa2007-05-02 19:27:14 +02001307 paravirt_clobber(CLBR_EAX)
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001308 : "memory", "cc" PV_VEXTRA_CLOBBERS);
Rusty Russell139ec7c2006-12-07 02:14:08 +01001309 return f;
1310}
1311
1312static inline void raw_local_irq_restore(unsigned long f)
1313{
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001314 asm volatile(paravirt_alt(PV_SAVE_REGS
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001315 PARAVIRT_CALL
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001316 PV_RESTORE_REGS)
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001317 : "=a"(f)
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001318 : PV_FLAGS_ARG(f),
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -07001319 paravirt_type(pv_irq_ops.restore_fl),
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001320 paravirt_clobber(CLBR_EAX)
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001321 : "memory", "cc" PV_EXTRA_CLOBBERS);
Rusty Russell139ec7c2006-12-07 02:14:08 +01001322}
1323
1324static inline void raw_local_irq_disable(void)
1325{
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001326 asm volatile(paravirt_alt(PV_SAVE_REGS
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001327 PARAVIRT_CALL
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001328 PV_RESTORE_REGS)
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001329 :
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -07001330 : paravirt_type(pv_irq_ops.irq_disable),
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001331 paravirt_clobber(CLBR_EAX)
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001332 : "memory", "eax", "cc" PV_EXTRA_CLOBBERS);
Rusty Russell139ec7c2006-12-07 02:14:08 +01001333}
1334
1335static inline void raw_local_irq_enable(void)
1336{
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001337 asm volatile(paravirt_alt(PV_SAVE_REGS
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001338 PARAVIRT_CALL
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001339 PV_RESTORE_REGS)
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001340 :
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -07001341 : paravirt_type(pv_irq_ops.irq_enable),
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001342 paravirt_clobber(CLBR_EAX)
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001343 : "memory", "eax", "cc" PV_EXTRA_CLOBBERS);
Rusty Russell139ec7c2006-12-07 02:14:08 +01001344}
1345
1346static inline unsigned long __raw_local_irq_save(void)
1347{
1348 unsigned long f;
1349
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001350 f = __raw_local_save_flags();
1351 raw_local_irq_disable();
Rusty Russell139ec7c2006-12-07 02:14:08 +01001352 return f;
1353}
1354
Jeremy Fitzhardinge294688c2007-05-02 19:27:14 +02001355/* Make sure as little as possible of this mess escapes. */
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001356#undef PARAVIRT_CALL
Jeremy Fitzhardinge1a45b7a2007-05-02 19:27:15 +02001357#undef __PVOP_CALL
1358#undef __PVOP_VCALL
Jeremy Fitzhardingef8822f42007-05-02 19:27:14 +02001359#undef PVOP_VCALL0
1360#undef PVOP_CALL0
1361#undef PVOP_VCALL1
1362#undef PVOP_CALL1
1363#undef PVOP_VCALL2
1364#undef PVOP_CALL2
1365#undef PVOP_VCALL3
1366#undef PVOP_CALL3
1367#undef PVOP_VCALL4
1368#undef PVOP_CALL4
Rusty Russell139ec7c2006-12-07 02:14:08 +01001369
Rusty Russelld3561b72006-12-07 02:14:07 +01001370#else /* __ASSEMBLY__ */
1371
Glauber de Oliveira Costa658be9d2008-01-30 13:32:06 +01001372#define _PVSITE(ptype, clobbers, ops, word, algn) \
Rusty Russell139ec7c2006-12-07 02:14:08 +01001373771:; \
1374 ops; \
1375772:; \
1376 .pushsection .parainstructions,"a"; \
Glauber de Oliveira Costa658be9d2008-01-30 13:32:06 +01001377 .align algn; \
1378 word 771b; \
Rusty Russell139ec7c2006-12-07 02:14:08 +01001379 .byte ptype; \
1380 .byte 772b-771b; \
1381 .short clobbers; \
1382 .popsection
1383
Glauber de Oliveira Costa658be9d2008-01-30 13:32:06 +01001384
1385#ifdef CONFIG_X86_64
Glauber de Oliveira Costa6057fc82008-01-30 13:32:06 +01001386#define PV_SAVE_REGS pushq %rax; pushq %rdi; pushq %rcx; pushq %rdx
1387#define PV_RESTORE_REGS popq %rdx; popq %rcx; popq %rdi; popq %rax
1388#define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 8)
Glauber de Oliveira Costa658be9d2008-01-30 13:32:06 +01001389#define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .quad, 8)
1390#else
Glauber de Oliveira Costa6057fc82008-01-30 13:32:06 +01001391#define PV_SAVE_REGS pushl %eax; pushl %edi; pushl %ecx; pushl %edx
1392#define PV_RESTORE_REGS popl %edx; popl %ecx; popl %edi; popl %eax
1393#define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 4)
Glauber de Oliveira Costa658be9d2008-01-30 13:32:06 +01001394#define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .long, 4)
1395#endif
1396
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -07001397#define INTERRUPT_RETURN \
1398 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_iret), CLBR_NONE, \
1399 jmp *%cs:pv_cpu_ops+PV_CPU_iret)
Rusty Russell139ec7c2006-12-07 02:14:08 +01001400
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001401#define DISABLE_INTERRUPTS(clobbers) \
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -07001402 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_disable), clobbers, \
Glauber de Oliveira Costa6057fc82008-01-30 13:32:06 +01001403 PV_SAVE_REGS; \
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -07001404 call *%cs:pv_irq_ops+PV_IRQ_irq_disable; \
Glauber de Oliveira Costa6057fc82008-01-30 13:32:06 +01001405 PV_RESTORE_REGS;) \
Rusty Russell139ec7c2006-12-07 02:14:08 +01001406
Jeremy Fitzhardinged5822032007-05-02 19:27:14 +02001407#define ENABLE_INTERRUPTS(clobbers) \
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -07001408 PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_enable), clobbers, \
Glauber de Oliveira Costa6057fc82008-01-30 13:32:06 +01001409 PV_SAVE_REGS; \
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -07001410 call *%cs:pv_irq_ops+PV_IRQ_irq_enable; \
Glauber de Oliveira Costa6057fc82008-01-30 13:32:06 +01001411 PV_RESTORE_REGS;)
Rusty Russell139ec7c2006-12-07 02:14:08 +01001412
Glauber de Oliveira Costa6abcd982008-01-30 13:30:33 +01001413#define ENABLE_INTERRUPTS_SYSCALL_RET \
1414 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_irq_enable_syscall_ret),\
1415 CLBR_NONE, \
1416 jmp *%cs:pv_cpu_ops+PV_CPU_irq_enable_syscall_ret)
Rusty Russell139ec7c2006-12-07 02:14:08 +01001417
Glauber de Oliveira Costa2e47d3e2008-01-30 13:32:07 +01001418
Glauber de Oliveira Costa6057fc82008-01-30 13:32:06 +01001419#ifdef CONFIG_X86_32
Rusty Russell139ec7c2006-12-07 02:14:08 +01001420#define GET_CR0_INTO_EAX \
Jeremy Fitzhardinge42c24fa2007-05-02 19:27:14 +02001421 push %ecx; push %edx; \
Jeremy Fitzhardinge93b1eab2007-10-16 11:51:29 -07001422 call *pv_cpu_ops+PV_CPU_read_cr0; \
Jeremy Fitzhardinge42c24fa2007-05-02 19:27:14 +02001423 pop %edx; pop %ecx
Glauber de Oliveira Costa4a8c4c42008-01-30 13:32:07 +01001424#else
Glauber de Oliveira Costae801f862008-01-30 13:32:08 +01001425#define SWAPGS \
1426 PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \
1427 PV_SAVE_REGS; \
1428 call *pv_cpu_ops+PV_CPU_swapgs; \
1429 PV_RESTORE_REGS \
1430 )
1431
Glauber de Oliveira Costa4a8c4c42008-01-30 13:32:07 +01001432#define GET_CR2_INTO_RCX \
1433 call *pv_mmu_ops+PV_MMU_read_cr2; \
1434 movq %rax, %rcx; \
1435 xorq %rax, %rax;
1436
Glauber de Oliveira Costa6057fc82008-01-30 13:32:06 +01001437#endif
Rusty Russell139ec7c2006-12-07 02:14:08 +01001438
Rusty Russelld3561b72006-12-07 02:14:07 +01001439#endif /* __ASSEMBLY__ */
1440#endif /* CONFIG_PARAVIRT */
1441#endif /* __ASM_PARAVIRT_H */