1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2ac5672f8SJeremy Fitzhardinge #ifndef _ASM_X86_PARAVIRT_TYPES_H 3ac5672f8SJeremy Fitzhardinge #define _ASM_X86_PARAVIRT_TYPES_H 4ac5672f8SJeremy Fitzhardinge 5*239f2e24SThomas Gleixner #ifndef __ASSEMBLY__ 6*239f2e24SThomas Gleixner /* These all sit in the .parainstructions section to tell us what to patch. */ 7*239f2e24SThomas Gleixner struct paravirt_patch_site { 8*239f2e24SThomas Gleixner u8 *instr; /* original instructions */ 9*239f2e24SThomas Gleixner u8 type; /* type of this instruction */ 10*239f2e24SThomas Gleixner u8 len; /* length of original instruction */ 11*239f2e24SThomas Gleixner }; 12*239f2e24SThomas Gleixner #endif 13*239f2e24SThomas Gleixner 14*239f2e24SThomas Gleixner #ifdef CONFIG_PARAVIRT 15*239f2e24SThomas Gleixner 16ac5672f8SJeremy Fitzhardinge /* Bitmask of what can be clobbered: usually at least eax. */ 17ac5672f8SJeremy Fitzhardinge #define CLBR_EAX (1 << 0) 18ac5672f8SJeremy Fitzhardinge #define CLBR_ECX (1 << 1) 19ac5672f8SJeremy Fitzhardinge #define CLBR_EDX (1 << 2) 20ac5672f8SJeremy Fitzhardinge #define CLBR_EDI (1 << 3) 21ac5672f8SJeremy Fitzhardinge 22ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_X86_32 23ac5672f8SJeremy Fitzhardinge /* CLBR_ANY should match all regs platform has. For i386, that's just it */ 24ac5672f8SJeremy Fitzhardinge #define CLBR_ANY ((1 << 4) - 1) 25ac5672f8SJeremy Fitzhardinge 26ac5672f8SJeremy Fitzhardinge #define CLBR_ARG_REGS (CLBR_EAX | CLBR_EDX | CLBR_ECX) 27ac5672f8SJeremy Fitzhardinge #define CLBR_RET_REG (CLBR_EAX | CLBR_EDX) 28ac5672f8SJeremy Fitzhardinge #else 29ac5672f8SJeremy Fitzhardinge #define CLBR_RAX CLBR_EAX 30ac5672f8SJeremy Fitzhardinge #define CLBR_RCX CLBR_ECX 31ac5672f8SJeremy Fitzhardinge #define CLBR_RDX CLBR_EDX 32ac5672f8SJeremy Fitzhardinge #define CLBR_RDI CLBR_EDI 33ac5672f8SJeremy Fitzhardinge #define CLBR_RSI (1 << 4) 34ac5672f8SJeremy Fitzhardinge #define CLBR_R8 (1 << 5) 35ac5672f8SJeremy Fitzhardinge #define CLBR_R9 (1 << 6) 36ac5672f8SJeremy Fitzhardinge #define CLBR_R10 (1 << 7) 37ac5672f8SJeremy Fitzhardinge #define CLBR_R11 (1 << 8) 38ac5672f8SJeremy Fitzhardinge 39ac5672f8SJeremy Fitzhardinge #define CLBR_ANY ((1 << 9) - 1) 40ac5672f8SJeremy Fitzhardinge 41ac5672f8SJeremy Fitzhardinge #define CLBR_ARG_REGS (CLBR_RDI | CLBR_RSI | CLBR_RDX | \ 42ac5672f8SJeremy Fitzhardinge CLBR_RCX | CLBR_R8 | CLBR_R9) 43ac5672f8SJeremy Fitzhardinge #define CLBR_RET_REG (CLBR_RAX) 44ac5672f8SJeremy Fitzhardinge 45ac5672f8SJeremy Fitzhardinge #endif /* X86_64 */ 46ac5672f8SJeremy Fitzhardinge 47ac5672f8SJeremy Fitzhardinge #ifndef __ASSEMBLY__ 48ac5672f8SJeremy Fitzhardinge 49ac5672f8SJeremy Fitzhardinge #include <asm/desc_defs.h> 50318f5a2aSAndy Lutomirski #include <asm/pgtable_types.h> 513010a066SPeter Zijlstra #include <asm/nospec-branch.h> 52ac5672f8SJeremy Fitzhardinge 53ac5672f8SJeremy Fitzhardinge struct page; 54ac5672f8SJeremy Fitzhardinge struct thread_struct; 55ac5672f8SJeremy Fitzhardinge struct desc_ptr; 56ac5672f8SJeremy Fitzhardinge struct tss_struct; 57ac5672f8SJeremy Fitzhardinge struct mm_struct; 58ac5672f8SJeremy Fitzhardinge struct desc_struct; 59ac5672f8SJeremy Fitzhardinge struct task_struct; 60ac5672f8SJeremy Fitzhardinge struct cpumask; 61a2055abeSAndy Lutomirski struct flush_tlb_info; 6248a8b97cSPeter Zijlstra struct mmu_gather; 630cbe3e26SAneesh Kumar K.V struct vm_area_struct; 64ac5672f8SJeremy Fitzhardinge 65ac5672f8SJeremy Fitzhardinge /* 66ac5672f8SJeremy Fitzhardinge * Wrapper type for pointers to code which uses the non-standard 67ac5672f8SJeremy Fitzhardinge * calling convention. See PV_CALL_SAVE_REGS_THUNK below. 68ac5672f8SJeremy Fitzhardinge */ 69ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save { 70ac5672f8SJeremy Fitzhardinge void *func; 71ac5672f8SJeremy Fitzhardinge }; 72ac5672f8SJeremy Fitzhardinge 73ac5672f8SJeremy Fitzhardinge /* general info */ 74ac5672f8SJeremy Fitzhardinge struct pv_info { 7540181646SJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 76318f5a2aSAndy Lutomirski u16 extra_user_64bit_cs; /* __USER_CS if none */ 77318f5a2aSAndy Lutomirski #endif 78318f5a2aSAndy Lutomirski 79ac5672f8SJeremy Fitzhardinge const char *name; 80ac5672f8SJeremy Fitzhardinge }; 81ac5672f8SJeremy Fitzhardinge 82fdc0269eSJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 83ac5672f8SJeremy Fitzhardinge struct pv_lazy_ops { 84ac5672f8SJeremy Fitzhardinge /* Set deferred update mode, used for batching operations. */ 85ac5672f8SJeremy Fitzhardinge void (*enter)(void); 86ac5672f8SJeremy Fitzhardinge void (*leave)(void); 87511ba86eSBoris Ostrovsky void (*flush)(void); 888acdf505SKees Cook } __no_randomize_layout; 89fdc0269eSJuergen Gross #endif 90ac5672f8SJeremy Fitzhardinge 91ac5672f8SJeremy Fitzhardinge struct pv_cpu_ops { 92ac5672f8SJeremy Fitzhardinge /* hooks for various privileged instructions */ 939bad5658SJuergen Gross void (*io_delay)(void); 949bad5658SJuergen Gross 959bad5658SJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 96ac5672f8SJeremy Fitzhardinge unsigned long (*get_debugreg)(int regno); 97ac5672f8SJeremy Fitzhardinge void (*set_debugreg)(int regno, unsigned long value); 98ac5672f8SJeremy Fitzhardinge 99ac5672f8SJeremy Fitzhardinge unsigned long (*read_cr0)(void); 100ac5672f8SJeremy Fitzhardinge void (*write_cr0)(unsigned long); 101ac5672f8SJeremy Fitzhardinge 102ac5672f8SJeremy Fitzhardinge void (*write_cr4)(unsigned long); 103ac5672f8SJeremy Fitzhardinge 104ac5672f8SJeremy Fitzhardinge /* Segment descriptor handling */ 105ac5672f8SJeremy Fitzhardinge void (*load_tr_desc)(void); 106ac5672f8SJeremy Fitzhardinge void (*load_gdt)(const struct desc_ptr *); 107ac5672f8SJeremy Fitzhardinge void (*load_idt)(const struct desc_ptr *); 108ac5672f8SJeremy Fitzhardinge void (*set_ldt)(const void *desc, unsigned entries); 109ac5672f8SJeremy Fitzhardinge unsigned long (*store_tr)(void); 110ac5672f8SJeremy Fitzhardinge void (*load_tls)(struct thread_struct *t, unsigned int cpu); 111ac5672f8SJeremy Fitzhardinge void (*load_gs_index)(unsigned int idx); 112ac5672f8SJeremy Fitzhardinge void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum, 113ac5672f8SJeremy Fitzhardinge const void *desc); 114ac5672f8SJeremy Fitzhardinge void (*write_gdt_entry)(struct desc_struct *, 115ac5672f8SJeremy Fitzhardinge int entrynum, const void *desc, int size); 116ac5672f8SJeremy Fitzhardinge void (*write_idt_entry)(gate_desc *, 117ac5672f8SJeremy Fitzhardinge int entrynum, const gate_desc *gate); 118ac5672f8SJeremy Fitzhardinge void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries); 119ac5672f8SJeremy Fitzhardinge void (*free_ldt)(struct desc_struct *ldt, unsigned entries); 120ac5672f8SJeremy Fitzhardinge 121da51da18SAndy Lutomirski void (*load_sp0)(unsigned long sp0); 122ac5672f8SJeremy Fitzhardinge 12399bcd4a6SJuergen Gross #ifdef CONFIG_X86_IOPL_IOPERM 124cadfad87SAndy Lutomirski void (*invalidate_io_bitmap)(void); 12599bcd4a6SJuergen Gross void (*update_io_bitmap)(void); 12699bcd4a6SJuergen Gross #endif 12799bcd4a6SJuergen Gross 128ac5672f8SJeremy Fitzhardinge void (*wbinvd)(void); 129ac5672f8SJeremy Fitzhardinge 130ac5672f8SJeremy Fitzhardinge /* cpuid emulation, mostly so that caps bits can be disabled */ 131ac5672f8SJeremy Fitzhardinge void (*cpuid)(unsigned int *eax, unsigned int *ebx, 132ac5672f8SJeremy Fitzhardinge unsigned int *ecx, unsigned int *edx); 133ac5672f8SJeremy Fitzhardinge 134dd2f4a00SAndy Lutomirski /* Unsafe MSR operations. These will warn or panic on failure. */ 135dd2f4a00SAndy Lutomirski u64 (*read_msr)(unsigned int msr); 136dd2f4a00SAndy Lutomirski void (*write_msr)(unsigned int msr, unsigned low, unsigned high); 137dd2f4a00SAndy Lutomirski 138dd2f4a00SAndy Lutomirski /* 139dd2f4a00SAndy Lutomirski * Safe MSR operations. 140dd2f4a00SAndy Lutomirski * read sets err to 0 or -EIO. write returns 0 or -EIO. 141dd2f4a00SAndy Lutomirski */ 142c2ee03b2SAndy Lutomirski u64 (*read_msr_safe)(unsigned int msr, int *err); 143c2ee03b2SAndy Lutomirski int (*write_msr_safe)(unsigned int msr, unsigned low, unsigned high); 144ac5672f8SJeremy Fitzhardinge 145ac5672f8SJeremy Fitzhardinge u64 (*read_pmc)(int counter); 146ac5672f8SJeremy Fitzhardinge 147ac5672f8SJeremy Fitzhardinge void (*start_context_switch)(struct task_struct *prev); 148ac5672f8SJeremy Fitzhardinge void (*end_context_switch)(struct task_struct *next); 1499bad5658SJuergen Gross #endif 1508acdf505SKees Cook } __no_randomize_layout; 151ac5672f8SJeremy Fitzhardinge 152ac5672f8SJeremy Fitzhardinge struct pv_irq_ops { 1536da63eb2SJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 154ac5672f8SJeremy Fitzhardinge /* 155ab234a26SJuergen Gross * Get/set interrupt state. save_fl is expected to use X86_EFLAGS_IF; 156ab234a26SJuergen Gross * all other bits returned from save_fl are undefined. 157ac5672f8SJeremy Fitzhardinge * 158ac5672f8SJeremy Fitzhardinge * NOTE: These functions callers expect the callee to preserve 159ac5672f8SJeremy Fitzhardinge * more registers than the standard C calling convention. 160ac5672f8SJeremy Fitzhardinge */ 161ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save save_fl; 162ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save irq_disable; 163ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save irq_enable; 164ac5672f8SJeremy Fitzhardinge 165ac5672f8SJeremy Fitzhardinge void (*safe_halt)(void); 166ac5672f8SJeremy Fitzhardinge void (*halt)(void); 1676da63eb2SJuergen Gross #endif 1688acdf505SKees Cook } __no_randomize_layout; 169ac5672f8SJeremy Fitzhardinge 170ac5672f8SJeremy Fitzhardinge struct pv_mmu_ops { 171ac5672f8SJeremy Fitzhardinge /* TLB operations */ 172ac5672f8SJeremy Fitzhardinge void (*flush_tlb_user)(void); 173ac5672f8SJeremy Fitzhardinge void (*flush_tlb_kernel)(void); 1741299ef1dSAndy Lutomirski void (*flush_tlb_one_user)(unsigned long addr); 1754ce94eabSNadav Amit void (*flush_tlb_multi)(const struct cpumask *cpus, 176a2055abeSAndy Lutomirski const struct flush_tlb_info *info); 177ac5672f8SJeremy Fitzhardinge 17848a8b97cSPeter Zijlstra void (*tlb_remove_table)(struct mmu_gather *tlb, void *table); 17948a8b97cSPeter Zijlstra 180fdc0269eSJuergen Gross /* Hook for intercepting the destruction of an mm_struct. */ 181fdc0269eSJuergen Gross void (*exit_mmap)(struct mm_struct *mm); 182064ce6c5SBrijesh Singh void (*notify_page_enc_status_changed)(unsigned long pfn, int npages, bool enc); 183fdc0269eSJuergen Gross 184fdc0269eSJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 18555aedddbSPeter Zijlstra struct paravirt_callee_save read_cr2; 186fdc0269eSJuergen Gross void (*write_cr2)(unsigned long); 187fdc0269eSJuergen Gross 188fdc0269eSJuergen Gross unsigned long (*read_cr3)(void); 189fdc0269eSJuergen Gross void (*write_cr3)(unsigned long); 190fdc0269eSJuergen Gross 191fdc0269eSJuergen Gross /* Hooks for intercepting the creation/use of an mm_struct. */ 192fdc0269eSJuergen Gross void (*activate_mm)(struct mm_struct *prev, 193fdc0269eSJuergen Gross struct mm_struct *next); 194fdc0269eSJuergen Gross void (*dup_mmap)(struct mm_struct *oldmm, 195fdc0269eSJuergen Gross struct mm_struct *mm); 196fdc0269eSJuergen Gross 197ac5672f8SJeremy Fitzhardinge /* Hooks for allocating and freeing a pagetable top-level */ 198ac5672f8SJeremy Fitzhardinge int (*pgd_alloc)(struct mm_struct *mm); 199ac5672f8SJeremy Fitzhardinge void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd); 200ac5672f8SJeremy Fitzhardinge 201ac5672f8SJeremy Fitzhardinge /* 202ac5672f8SJeremy Fitzhardinge * Hooks for allocating/releasing pagetable pages when they're 203ac5672f8SJeremy Fitzhardinge * attached to a pagetable 204ac5672f8SJeremy Fitzhardinge */ 205ac5672f8SJeremy Fitzhardinge void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn); 206ac5672f8SJeremy Fitzhardinge void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn); 207ac5672f8SJeremy Fitzhardinge void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn); 208335437fbSKirill A. Shutemov void (*alloc_p4d)(struct mm_struct *mm, unsigned long pfn); 209ac5672f8SJeremy Fitzhardinge void (*release_pte)(unsigned long pfn); 210ac5672f8SJeremy Fitzhardinge void (*release_pmd)(unsigned long pfn); 211ac5672f8SJeremy Fitzhardinge void (*release_pud)(unsigned long pfn); 212335437fbSKirill A. Shutemov void (*release_p4d)(unsigned long pfn); 213ac5672f8SJeremy Fitzhardinge 214ac5672f8SJeremy Fitzhardinge /* Pagetable manipulation functions */ 215ac5672f8SJeremy Fitzhardinge void (*set_pte)(pte_t *ptep, pte_t pteval); 216ac5672f8SJeremy Fitzhardinge void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval); 217ac5672f8SJeremy Fitzhardinge 2180cbe3e26SAneesh Kumar K.V pte_t (*ptep_modify_prot_start)(struct vm_area_struct *vma, unsigned long addr, 219ac5672f8SJeremy Fitzhardinge pte_t *ptep); 2200cbe3e26SAneesh Kumar K.V void (*ptep_modify_prot_commit)(struct vm_area_struct *vma, unsigned long addr, 221ac5672f8SJeremy Fitzhardinge pte_t *ptep, pte_t pte); 222ac5672f8SJeremy Fitzhardinge 223ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save pte_val; 224ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save make_pte; 225ac5672f8SJeremy Fitzhardinge 226ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save pgd_val; 227ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save make_pgd; 228ac5672f8SJeremy Fitzhardinge 229ac5672f8SJeremy Fitzhardinge void (*set_pud)(pud_t *pudp, pud_t pudval); 230ac5672f8SJeremy Fitzhardinge 231ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save pmd_val; 232ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save make_pmd; 233ac5672f8SJeremy Fitzhardinge 234ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save pud_val; 235ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save make_pud; 236ac5672f8SJeremy Fitzhardinge 237f2a6a705SKirill A. Shutemov void (*set_p4d)(p4d_t *p4dp, p4d_t p4dval); 238f2a6a705SKirill A. Shutemov 239f2a6a705SKirill A. Shutemov #if CONFIG_PGTABLE_LEVELS >= 5 240335437fbSKirill A. Shutemov struct paravirt_callee_save p4d_val; 241335437fbSKirill A. Shutemov struct paravirt_callee_save make_p4d; 242335437fbSKirill A. Shutemov 243335437fbSKirill A. Shutemov void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval); 244f2a6a705SKirill A. Shutemov #endif /* CONFIG_PGTABLE_LEVELS >= 5 */ 245f2a6a705SKirill A. Shutemov 246ac5672f8SJeremy Fitzhardinge struct pv_lazy_ops lazy_mode; 247ac5672f8SJeremy Fitzhardinge 248ac5672f8SJeremy Fitzhardinge /* dom0 ops */ 249ac5672f8SJeremy Fitzhardinge 250ac5672f8SJeremy Fitzhardinge /* Sometimes the physical address is a pfn, and sometimes its 251ac5672f8SJeremy Fitzhardinge an mfn. We can tell which is which from the index. */ 252ac5672f8SJeremy Fitzhardinge void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx, 253ac5672f8SJeremy Fitzhardinge phys_addr_t phys, pgprot_t flags); 254fdc0269eSJuergen Gross #endif 2558acdf505SKees Cook } __no_randomize_layout; 256ac5672f8SJeremy Fitzhardinge 257445c8951SThomas Gleixner struct arch_spinlock; 258545ac138SJeremy Fitzhardinge #ifdef CONFIG_SMP 259545ac138SJeremy Fitzhardinge #include <asm/spinlock_types.h> 260545ac138SJeremy Fitzhardinge #endif 261545ac138SJeremy Fitzhardinge 262f233f7f1SPeter Zijlstra (Intel) struct qspinlock; 263f233f7f1SPeter Zijlstra (Intel) 264ac5672f8SJeremy Fitzhardinge struct pv_lock_ops { 265f233f7f1SPeter Zijlstra (Intel) void (*queued_spin_lock_slowpath)(struct qspinlock *lock, u32 val); 266f233f7f1SPeter Zijlstra (Intel) struct paravirt_callee_save queued_spin_unlock; 267f233f7f1SPeter Zijlstra (Intel) 268f233f7f1SPeter Zijlstra (Intel) void (*wait)(u8 *ptr, u8 val); 269f233f7f1SPeter Zijlstra (Intel) void (*kick)(int cpu); 270446f3dc8SPan Xinhui 2713cded417SPeter Zijlstra struct paravirt_callee_save vcpu_is_preempted; 2728acdf505SKees Cook } __no_randomize_layout; 273ac5672f8SJeremy Fitzhardinge 274ac5672f8SJeremy Fitzhardinge /* This contains all the paravirt structures: we get a convenient 275ac5672f8SJeremy Fitzhardinge * number for each function using the offset which we use to indicate 276ac5672f8SJeremy Fitzhardinge * what to patch. */ 277ac5672f8SJeremy Fitzhardinge struct paravirt_patch_template { 2785c83511bSJuergen Gross struct pv_cpu_ops cpu; 2795c83511bSJuergen Gross struct pv_irq_ops irq; 2805c83511bSJuergen Gross struct pv_mmu_ops mmu; 2815c83511bSJuergen Gross struct pv_lock_ops lock; 2828acdf505SKees Cook } __no_randomize_layout; 283ac5672f8SJeremy Fitzhardinge 284ac5672f8SJeremy Fitzhardinge extern struct pv_info pv_info; 2855c83511bSJuergen Gross extern struct paravirt_patch_template pv_ops; 286ac5672f8SJeremy Fitzhardinge 287ac5672f8SJeremy Fitzhardinge #define PARAVIRT_PATCH(x) \ 288ac5672f8SJeremy Fitzhardinge (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) 289ac5672f8SJeremy Fitzhardinge 290ac5672f8SJeremy Fitzhardinge #define paravirt_type(op) \ 291ac5672f8SJeremy Fitzhardinge [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \ 2922e1f8e55SJan Beulich [paravirt_opptr] "m" (pv_ops.op) 293ac5672f8SJeremy Fitzhardinge #define paravirt_clobber(clobber) \ 294ac5672f8SJeremy Fitzhardinge [paravirt_clobber] "i" (clobber) 295ac5672f8SJeremy Fitzhardinge 296a4da3d86SIngo Molnar /* 297a4da3d86SIngo Molnar * Generate some code, and mark it as patchable by the 298a4da3d86SIngo Molnar * apply_paravirt() alternate instruction patcher. 299a4da3d86SIngo Molnar */ 300a4da3d86SIngo Molnar #define _paravirt_alt(insn_string, type, clobber) \ 301a4da3d86SIngo Molnar "771:\n\t" insn_string "\n" "772:\n" \ 302a4da3d86SIngo Molnar ".pushsection .parainstructions,\"a\"\n" \ 303a4da3d86SIngo Molnar _ASM_ALIGN "\n" \ 304a4da3d86SIngo Molnar _ASM_PTR " 771b\n" \ 305a4da3d86SIngo Molnar " .byte " type "\n" \ 306a4da3d86SIngo Molnar " .byte 772b-771b\n" \ 307a4da3d86SIngo Molnar " .short " clobber "\n" \ 308f92ff8f5SThomas Gleixner _ASM_ALIGN "\n" \ 309a4da3d86SIngo Molnar ".popsection\n" 310a4da3d86SIngo Molnar 311ac5672f8SJeremy Fitzhardinge /* Generate patchable code, with the default asm parameters. */ 312a4da3d86SIngo Molnar #define paravirt_alt(insn_string) \ 313a4da3d86SIngo Molnar _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]") 314ac5672f8SJeremy Fitzhardinge 315ac5672f8SJeremy Fitzhardinge /* Simple instruction patching code. */ 316824a2870SAndi Kleen #define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t" 317824a2870SAndi Kleen 318054ac8adSJuergen Gross unsigned int paravirt_patch(u8 type, void *insn_buff, unsigned long addr, unsigned int len); 319ac5672f8SJeremy Fitzhardinge 320ac5672f8SJeremy Fitzhardinge int paravirt_disable_iospace(void); 321ac5672f8SJeremy Fitzhardinge 322ac5672f8SJeremy Fitzhardinge /* 323a4da3d86SIngo Molnar * This generates an indirect call based on the operation type number. 324a4da3d86SIngo Molnar * The type number, computed in PARAVIRT_PATCH, is derived from the 325a4da3d86SIngo Molnar * offset into the paravirt_patch_template structure, and can therefore be 326a4da3d86SIngo Molnar * freely converted back into a structure offset. 327a4da3d86SIngo Molnar */ 328a4da3d86SIngo Molnar #define PARAVIRT_CALL \ 329a4da3d86SIngo Molnar ANNOTATE_RETPOLINE_SAFE \ 3302e1f8e55SJan Beulich "call *%[paravirt_opptr];" 331a4da3d86SIngo Molnar 332a4da3d86SIngo Molnar /* 333ac5672f8SJeremy Fitzhardinge * These macros are intended to wrap calls through one of the paravirt 334ac5672f8SJeremy Fitzhardinge * ops structs, so that they can be later identified and patched at 335ac5672f8SJeremy Fitzhardinge * runtime. 336ac5672f8SJeremy Fitzhardinge * 337ac5672f8SJeremy Fitzhardinge * Normally, a call to a pv_op function is a simple indirect call: 338ac5672f8SJeremy Fitzhardinge * (pv_op_struct.operations)(args...). 339ac5672f8SJeremy Fitzhardinge * 340ac5672f8SJeremy Fitzhardinge * Unfortunately, this is a relatively slow operation for modern CPUs, 341ac5672f8SJeremy Fitzhardinge * because it cannot necessarily determine what the destination 342ac5672f8SJeremy Fitzhardinge * address is. In this case, the address is a runtime constant, so at 343f67b90beSBill Wendling * the very least we can patch the call to a simple direct call, or, 344ac5672f8SJeremy Fitzhardinge * ideally, patch an inline implementation into the callsite. (Direct 345ac5672f8SJeremy Fitzhardinge * calls are essentially free, because the call and return addresses 346ac5672f8SJeremy Fitzhardinge * are completely predictable.) 347ac5672f8SJeremy Fitzhardinge * 348ac5672f8SJeremy Fitzhardinge * For i386, these macros rely on the standard gcc "regparm(3)" calling 349ac5672f8SJeremy Fitzhardinge * convention, in which the first three arguments are placed in %eax, 350ac5672f8SJeremy Fitzhardinge * %edx, %ecx (in that order), and the remaining arguments are placed 351ac5672f8SJeremy Fitzhardinge * on the stack. All caller-save registers (eax,edx,ecx) are expected 352ac5672f8SJeremy Fitzhardinge * to be modified (either clobbered or used for return values). 353ac5672f8SJeremy Fitzhardinge * X86_64, on the other hand, already specifies a register-based calling 354f67b90beSBill Wendling * conventions, returning at %rax, with parameters going in %rdi, %rsi, 355ac5672f8SJeremy Fitzhardinge * %rdx, and %rcx. Note that for this reason, x86_64 does not need any 356ac5672f8SJeremy Fitzhardinge * special handling for dealing with 4 arguments, unlike i386. 357f67b90beSBill Wendling * However, x86_64 also has to clobber all caller saved registers, which 358ac5672f8SJeremy Fitzhardinge * unfortunately, are quite a bit (r8 - r11) 359ac5672f8SJeremy Fitzhardinge * 360ac5672f8SJeremy Fitzhardinge * The call instruction itself is marked by placing its start address 361ac5672f8SJeremy Fitzhardinge * and size into the .parainstructions section, so that 362ac5672f8SJeremy Fitzhardinge * apply_paravirt() in arch/i386/kernel/alternative.c can do the 363ac5672f8SJeremy Fitzhardinge * appropriate patching under the control of the backend pv_init_ops 364ac5672f8SJeremy Fitzhardinge * implementation. 365ac5672f8SJeremy Fitzhardinge * 366ac5672f8SJeremy Fitzhardinge * Unfortunately there's no way to get gcc to generate the args setup 367ac5672f8SJeremy Fitzhardinge * for the call, and then allow the call itself to be generated by an 368ac5672f8SJeremy Fitzhardinge * inline asm. Because of this, we must do the complete arg setup and 369ac5672f8SJeremy Fitzhardinge * return value handling from within these macros. This is fairly 370ac5672f8SJeremy Fitzhardinge * cumbersome. 371ac5672f8SJeremy Fitzhardinge * 372ac5672f8SJeremy Fitzhardinge * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments. 373ac5672f8SJeremy Fitzhardinge * It could be extended to more arguments, but there would be little 374ac5672f8SJeremy Fitzhardinge * to be gained from that. For each number of arguments, there are 375f67b90beSBill Wendling * two VCALL and CALL variants for void and non-void functions. 376ac5672f8SJeremy Fitzhardinge * 377ac5672f8SJeremy Fitzhardinge * When there is a return value, the invoker of the macro must specify 378ac5672f8SJeremy Fitzhardinge * the return type. The macro then uses sizeof() on that type to 379f67b90beSBill Wendling * determine whether it's a 32 or 64 bit value and places the return 380ac5672f8SJeremy Fitzhardinge * in the right register(s) (just %eax for 32-bit, and %edx:%eax for 381f67b90beSBill Wendling * 64-bit). For x86_64 machines, it just returns in %rax regardless of 382ac5672f8SJeremy Fitzhardinge * the return value size. 383ac5672f8SJeremy Fitzhardinge * 384f67b90beSBill Wendling * 64-bit arguments are passed as a pair of adjacent 32-bit arguments; 385ac5672f8SJeremy Fitzhardinge * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments 386ac5672f8SJeremy Fitzhardinge * in low,high order 387ac5672f8SJeremy Fitzhardinge * 388ac5672f8SJeremy Fitzhardinge * Small structures are passed and returned in registers. The macro 389ac5672f8SJeremy Fitzhardinge * calling convention can't directly deal with this, so the wrapper 390f67b90beSBill Wendling * functions must do it. 391ac5672f8SJeremy Fitzhardinge * 392ac5672f8SJeremy Fitzhardinge * These PVOP_* macros are only defined within this header. This 393ac5672f8SJeremy Fitzhardinge * means that all uses must be wrapped in inline functions. This also 394ac5672f8SJeremy Fitzhardinge * makes sure the incoming and outgoing types are always correct. 395ac5672f8SJeremy Fitzhardinge */ 396ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_X86_32 3970b8d366aSJuergen Gross #define PVOP_CALL_ARGS \ 398f5caf621SJosh Poimboeuf unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx; 399f5caf621SJosh Poimboeuf 400ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x)) 401ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x)) 402ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x)) 403ac5672f8SJeremy Fitzhardinge 404ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \ 405ac5672f8SJeremy Fitzhardinge "=c" (__ecx) 406ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS 407ac5672f8SJeremy Fitzhardinge 408ac5672f8SJeremy Fitzhardinge #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx) 409ac5672f8SJeremy Fitzhardinge #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 410ac5672f8SJeremy Fitzhardinge 411ac5672f8SJeremy Fitzhardinge #define EXTRA_CLOBBERS 412ac5672f8SJeremy Fitzhardinge #define VEXTRA_CLOBBERS 413ac5672f8SJeremy Fitzhardinge #else /* CONFIG_X86_64 */ 41471999d98SJeremy Fitzhardinge /* [re]ax isn't an arg, but the return val */ 4150b8d366aSJuergen Gross #define PVOP_CALL_ARGS \ 416ac5672f8SJeremy Fitzhardinge unsigned long __edi = __edi, __esi = __esi, \ 417f5caf621SJosh Poimboeuf __edx = __edx, __ecx = __ecx, __eax = __eax; 418f5caf621SJosh Poimboeuf 419ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x)) 420ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x)) 421ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x)) 422ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x)) 423ac5672f8SJeremy Fitzhardinge 424ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL_CLOBBERS "=D" (__edi), \ 425ac5672f8SJeremy Fitzhardinge "=S" (__esi), "=d" (__edx), \ 426ac5672f8SJeremy Fitzhardinge "=c" (__ecx) 427ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax) 428ac5672f8SJeremy Fitzhardinge 4298c86f29bSBill Wendling /* 4308c86f29bSBill Wendling * void functions are still allowed [re]ax for scratch. 4318c86f29bSBill Wendling * 4328c86f29bSBill Wendling * The ZERO_CALL_USED REGS feature may end up zeroing out callee-saved 4338c86f29bSBill Wendling * registers. Make sure we model this with the appropriate clobbers. 4348c86f29bSBill Wendling */ 4358c86f29bSBill Wendling #ifdef CONFIG_ZERO_CALL_USED_REGS 4368c86f29bSBill Wendling #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), PVOP_VCALL_CLOBBERS 4378c86f29bSBill Wendling #else 438ac5672f8SJeremy Fitzhardinge #define PVOP_VCALLEE_CLOBBERS "=a" (__eax) 4398c86f29bSBill Wendling #endif 440ac5672f8SJeremy Fitzhardinge #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 441ac5672f8SJeremy Fitzhardinge 442ac5672f8SJeremy Fitzhardinge #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11" 443ac5672f8SJeremy Fitzhardinge #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11" 444ac5672f8SJeremy Fitzhardinge #endif /* CONFIG_X86_32 */ 445ac5672f8SJeremy Fitzhardinge 446ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_PARAVIRT_DEBUG 4475c83511bSJuergen Gross #define PVOP_TEST_NULL(op) BUG_ON(pv_ops.op == NULL) 448ac5672f8SJeremy Fitzhardinge #else 4495c83511bSJuergen Gross #define PVOP_TEST_NULL(op) ((void)pv_ops.op) 450ac5672f8SJeremy Fitzhardinge #endif 451ac5672f8SJeremy Fitzhardinge 4520b8d366aSJuergen Gross #define PVOP_RETVAL(rettype) \ 45311f254dbSPeter Zijlstra ({ unsigned long __mask = ~0UL; \ 4540b8d366aSJuergen Gross BUILD_BUG_ON(sizeof(rettype) > sizeof(unsigned long)); \ 45511f254dbSPeter Zijlstra switch (sizeof(rettype)) { \ 45611f254dbSPeter Zijlstra case 1: __mask = 0xffUL; break; \ 45711f254dbSPeter Zijlstra case 2: __mask = 0xffffUL; break; \ 45811f254dbSPeter Zijlstra case 4: __mask = 0xffffffffUL; break; \ 45911f254dbSPeter Zijlstra default: break; \ 46011f254dbSPeter Zijlstra } \ 4610b8d366aSJuergen Gross __mask & __eax; \ 46211f254dbSPeter Zijlstra }) 46311f254dbSPeter Zijlstra 46411f254dbSPeter Zijlstra 4650b8d366aSJuergen Gross #define ____PVOP_CALL(ret, op, clbr, call_clbr, extra_clbr, ...) \ 466ac5672f8SJeremy Fitzhardinge ({ \ 467ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARGS; \ 468ac5672f8SJeremy Fitzhardinge PVOP_TEST_NULL(op); \ 46933634e42SJuergen Gross asm volatile(paravirt_alt(PARAVIRT_CALL) \ 470f5caf621SJosh Poimboeuf : call_clbr, ASM_CALL_CONSTRAINT \ 471ac5672f8SJeremy Fitzhardinge : paravirt_type(op), \ 472ac5672f8SJeremy Fitzhardinge paravirt_clobber(clbr), \ 473ac5672f8SJeremy Fitzhardinge ##__VA_ARGS__ \ 474ac5672f8SJeremy Fitzhardinge : "memory", "cc" extra_clbr); \ 4750b8d366aSJuergen Gross ret; \ 476ac5672f8SJeremy Fitzhardinge }) 477ac5672f8SJeremy Fitzhardinge 47800aa3193SJuergen Gross #define ____PVOP_ALT_CALL(ret, op, alt, cond, clbr, call_clbr, \ 47900aa3193SJuergen Gross extra_clbr, ...) \ 48000aa3193SJuergen Gross ({ \ 48100aa3193SJuergen Gross PVOP_CALL_ARGS; \ 48200aa3193SJuergen Gross PVOP_TEST_NULL(op); \ 48300aa3193SJuergen Gross asm volatile(ALTERNATIVE(paravirt_alt(PARAVIRT_CALL), \ 48400aa3193SJuergen Gross alt, cond) \ 48500aa3193SJuergen Gross : call_clbr, ASM_CALL_CONSTRAINT \ 48600aa3193SJuergen Gross : paravirt_type(op), \ 48700aa3193SJuergen Gross paravirt_clobber(clbr), \ 48800aa3193SJuergen Gross ##__VA_ARGS__ \ 48900aa3193SJuergen Gross : "memory", "cc" extra_clbr); \ 49000aa3193SJuergen Gross ret; \ 49100aa3193SJuergen Gross }) 49200aa3193SJuergen Gross 49333634e42SJuergen Gross #define __PVOP_CALL(rettype, op, ...) \ 4940b8d366aSJuergen Gross ____PVOP_CALL(PVOP_RETVAL(rettype), op, CLBR_ANY, \ 4950b8d366aSJuergen Gross PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, ##__VA_ARGS__) 496ac5672f8SJeremy Fitzhardinge 49700aa3193SJuergen Gross #define __PVOP_ALT_CALL(rettype, op, alt, cond, ...) \ 49800aa3193SJuergen Gross ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op, alt, cond, CLBR_ANY,\ 49900aa3193SJuergen Gross PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, \ 50000aa3193SJuergen Gross ##__VA_ARGS__) 50100aa3193SJuergen Gross 50233634e42SJuergen Gross #define __PVOP_CALLEESAVE(rettype, op, ...) \ 5030b8d366aSJuergen Gross ____PVOP_CALL(PVOP_RETVAL(rettype), op.func, CLBR_RET_REG, \ 50433634e42SJuergen Gross PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__) 505ac5672f8SJeremy Fitzhardinge 50600aa3193SJuergen Gross #define __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, ...) \ 50700aa3193SJuergen Gross ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op.func, alt, cond, \ 50800aa3193SJuergen Gross CLBR_RET_REG, PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__) 50900aa3193SJuergen Gross 51000aa3193SJuergen Gross 51133634e42SJuergen Gross #define __PVOP_VCALL(op, ...) \ 5120b8d366aSJuergen Gross (void)____PVOP_CALL(, op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \ 51333634e42SJuergen Gross VEXTRA_CLOBBERS, ##__VA_ARGS__) 514ac5672f8SJeremy Fitzhardinge 51500aa3193SJuergen Gross #define __PVOP_ALT_VCALL(op, alt, cond, ...) \ 51600aa3193SJuergen Gross (void)____PVOP_ALT_CALL(, op, alt, cond, CLBR_ANY, \ 51700aa3193SJuergen Gross PVOP_VCALL_CLOBBERS, VEXTRA_CLOBBERS, \ 51800aa3193SJuergen Gross ##__VA_ARGS__) 51900aa3193SJuergen Gross 52033634e42SJuergen Gross #define __PVOP_VCALLEESAVE(op, ...) \ 5210b8d366aSJuergen Gross (void)____PVOP_CALL(, op.func, CLBR_RET_REG, \ 52233634e42SJuergen Gross PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__) 523ac5672f8SJeremy Fitzhardinge 52400aa3193SJuergen Gross #define __PVOP_ALT_VCALLEESAVE(op, alt, cond, ...) \ 52500aa3193SJuergen Gross (void)____PVOP_ALT_CALL(, op.func, alt, cond, CLBR_RET_REG, \ 52600aa3193SJuergen Gross PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__) 527ac5672f8SJeremy Fitzhardinge 528ac5672f8SJeremy Fitzhardinge 529ac5672f8SJeremy Fitzhardinge #define PVOP_CALL0(rettype, op) \ 53033634e42SJuergen Gross __PVOP_CALL(rettype, op) 531ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL0(op) \ 53233634e42SJuergen Gross __PVOP_VCALL(op) 53300aa3193SJuergen Gross #define PVOP_ALT_CALL0(rettype, op, alt, cond) \ 53400aa3193SJuergen Gross __PVOP_ALT_CALL(rettype, op, alt, cond) 53500aa3193SJuergen Gross #define PVOP_ALT_VCALL0(op, alt, cond) \ 53600aa3193SJuergen Gross __PVOP_ALT_VCALL(op, alt, cond) 537ac5672f8SJeremy Fitzhardinge 538ac5672f8SJeremy Fitzhardinge #define PVOP_CALLEE0(rettype, op) \ 53933634e42SJuergen Gross __PVOP_CALLEESAVE(rettype, op) 540ac5672f8SJeremy Fitzhardinge #define PVOP_VCALLEE0(op) \ 54133634e42SJuergen Gross __PVOP_VCALLEESAVE(op) 54200aa3193SJuergen Gross #define PVOP_ALT_CALLEE0(rettype, op, alt, cond) \ 54300aa3193SJuergen Gross __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond) 54400aa3193SJuergen Gross #define PVOP_ALT_VCALLEE0(op, alt, cond) \ 54500aa3193SJuergen Gross __PVOP_ALT_VCALLEESAVE(op, alt, cond) 546ac5672f8SJeremy Fitzhardinge 547ac5672f8SJeremy Fitzhardinge 548ac5672f8SJeremy Fitzhardinge #define PVOP_CALL1(rettype, op, arg1) \ 54933634e42SJuergen Gross __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1)) 550ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL1(op, arg1) \ 55133634e42SJuergen Gross __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1)) 55200aa3193SJuergen Gross #define PVOP_ALT_VCALL1(op, arg1, alt, cond) \ 55300aa3193SJuergen Gross __PVOP_ALT_VCALL(op, alt, cond, PVOP_CALL_ARG1(arg1)) 554ac5672f8SJeremy Fitzhardinge 555ac5672f8SJeremy Fitzhardinge #define PVOP_CALLEE1(rettype, op, arg1) \ 55633634e42SJuergen Gross __PVOP_CALLEESAVE(rettype, op, PVOP_CALL_ARG1(arg1)) 557ac5672f8SJeremy Fitzhardinge #define PVOP_VCALLEE1(op, arg1) \ 55833634e42SJuergen Gross __PVOP_VCALLEESAVE(op, PVOP_CALL_ARG1(arg1)) 55900aa3193SJuergen Gross #define PVOP_ALT_CALLEE1(rettype, op, arg1, alt, cond) \ 56000aa3193SJuergen Gross __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, PVOP_CALL_ARG1(arg1)) 56100aa3193SJuergen Gross #define PVOP_ALT_VCALLEE1(op, arg1, alt, cond) \ 56200aa3193SJuergen Gross __PVOP_ALT_VCALLEESAVE(op, alt, cond, PVOP_CALL_ARG1(arg1)) 563ac5672f8SJeremy Fitzhardinge 564ac5672f8SJeremy Fitzhardinge 565ac5672f8SJeremy Fitzhardinge #define PVOP_CALL2(rettype, op, arg1, arg2) \ 56633634e42SJuergen Gross __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2)) 567ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL2(op, arg1, arg2) \ 56833634e42SJuergen Gross __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2)) 569ac5672f8SJeremy Fitzhardinge 570ac5672f8SJeremy Fitzhardinge #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \ 57133634e42SJuergen Gross __PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1), \ 572ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 573ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL3(op, arg1, arg2, arg3) \ 57433634e42SJuergen Gross __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), \ 575ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 576ac5672f8SJeremy Fitzhardinge 577ac5672f8SJeremy Fitzhardinge #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ 578ac5672f8SJeremy Fitzhardinge __PVOP_CALL(rettype, op, \ 579ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 580ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 581ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ 58233634e42SJuergen Gross __PVOP_VCALL(op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 583ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 584ac5672f8SJeremy Fitzhardinge 585ac5672f8SJeremy Fitzhardinge /* Lazy mode for batching updates / context switch */ 586ac5672f8SJeremy Fitzhardinge enum paravirt_lazy_mode { 587ac5672f8SJeremy Fitzhardinge PARAVIRT_LAZY_NONE, 588ac5672f8SJeremy Fitzhardinge PARAVIRT_LAZY_MMU, 589ac5672f8SJeremy Fitzhardinge PARAVIRT_LAZY_CPU, 590ac5672f8SJeremy Fitzhardinge }; 591ac5672f8SJeremy Fitzhardinge 592ac5672f8SJeremy Fitzhardinge enum paravirt_lazy_mode paravirt_get_lazy_mode(void); 593ac5672f8SJeremy Fitzhardinge void paravirt_start_context_switch(struct task_struct *prev); 594ac5672f8SJeremy Fitzhardinge void paravirt_end_context_switch(struct task_struct *next); 595ac5672f8SJeremy Fitzhardinge 596ac5672f8SJeremy Fitzhardinge void paravirt_enter_lazy_mmu(void); 597ac5672f8SJeremy Fitzhardinge void paravirt_leave_lazy_mmu(void); 598511ba86eSBoris Ostrovsky void paravirt_flush_lazy_mmu(void); 599ac5672f8SJeremy Fitzhardinge 600ac5672f8SJeremy Fitzhardinge void _paravirt_nop(void); 601e453f872SJuergen Gross void paravirt_BUG(void); 602ac5672f8SJeremy Fitzhardinge u64 _paravirt_ident_64(u64); 603e453f872SJuergen Gross unsigned long paravirt_ret0(void); 604ac5672f8SJeremy Fitzhardinge 605ac5672f8SJeremy Fitzhardinge #define paravirt_nop ((void *)_paravirt_nop) 606ac5672f8SJeremy Fitzhardinge 607ac5672f8SJeremy Fitzhardinge extern struct paravirt_patch_site __parainstructions[], 608ac5672f8SJeremy Fitzhardinge __parainstructions_end[]; 609ac5672f8SJeremy Fitzhardinge 610ac5672f8SJeremy Fitzhardinge #endif /* __ASSEMBLY__ */ 611*239f2e24SThomas Gleixner #endif /* CONFIG_PARAVIRT */ 612ac5672f8SJeremy Fitzhardinge #endif /* _ASM_X86_PARAVIRT_TYPES_H */ 613