1ac5672f8SJeremy Fitzhardinge #ifndef _ASM_X86_PARAVIRT_TYPES_H 2ac5672f8SJeremy Fitzhardinge #define _ASM_X86_PARAVIRT_TYPES_H 3ac5672f8SJeremy Fitzhardinge 4ac5672f8SJeremy Fitzhardinge /* Bitmask of what can be clobbered: usually at least eax. */ 5ac5672f8SJeremy Fitzhardinge #define CLBR_NONE 0 6ac5672f8SJeremy Fitzhardinge #define CLBR_EAX (1 << 0) 7ac5672f8SJeremy Fitzhardinge #define CLBR_ECX (1 << 1) 8ac5672f8SJeremy Fitzhardinge #define CLBR_EDX (1 << 2) 9ac5672f8SJeremy Fitzhardinge #define CLBR_EDI (1 << 3) 10ac5672f8SJeremy Fitzhardinge 11ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_X86_32 12ac5672f8SJeremy Fitzhardinge /* CLBR_ANY should match all regs platform has. For i386, that's just it */ 13ac5672f8SJeremy Fitzhardinge #define CLBR_ANY ((1 << 4) - 1) 14ac5672f8SJeremy Fitzhardinge 15ac5672f8SJeremy Fitzhardinge #define CLBR_ARG_REGS (CLBR_EAX | CLBR_EDX | CLBR_ECX) 16ac5672f8SJeremy Fitzhardinge #define CLBR_RET_REG (CLBR_EAX | CLBR_EDX) 17ac5672f8SJeremy Fitzhardinge #define CLBR_SCRATCH (0) 18ac5672f8SJeremy Fitzhardinge #else 19ac5672f8SJeremy Fitzhardinge #define CLBR_RAX CLBR_EAX 20ac5672f8SJeremy Fitzhardinge #define CLBR_RCX CLBR_ECX 21ac5672f8SJeremy Fitzhardinge #define CLBR_RDX CLBR_EDX 22ac5672f8SJeremy Fitzhardinge #define CLBR_RDI CLBR_EDI 23ac5672f8SJeremy Fitzhardinge #define CLBR_RSI (1 << 4) 24ac5672f8SJeremy Fitzhardinge #define CLBR_R8 (1 << 5) 25ac5672f8SJeremy Fitzhardinge #define CLBR_R9 (1 << 6) 26ac5672f8SJeremy Fitzhardinge #define CLBR_R10 (1 << 7) 27ac5672f8SJeremy Fitzhardinge #define CLBR_R11 (1 << 8) 28ac5672f8SJeremy Fitzhardinge 29ac5672f8SJeremy Fitzhardinge #define CLBR_ANY ((1 << 9) - 1) 30ac5672f8SJeremy Fitzhardinge 31ac5672f8SJeremy Fitzhardinge #define CLBR_ARG_REGS (CLBR_RDI | CLBR_RSI | CLBR_RDX | \ 32ac5672f8SJeremy Fitzhardinge CLBR_RCX | CLBR_R8 | CLBR_R9) 33ac5672f8SJeremy Fitzhardinge #define CLBR_RET_REG (CLBR_RAX) 34ac5672f8SJeremy Fitzhardinge #define CLBR_SCRATCH (CLBR_R10 | CLBR_R11) 35ac5672f8SJeremy Fitzhardinge 36ac5672f8SJeremy Fitzhardinge #endif /* X86_64 */ 37ac5672f8SJeremy Fitzhardinge 38ac5672f8SJeremy Fitzhardinge #define CLBR_CALLEE_SAVE ((CLBR_ARG_REGS | CLBR_SCRATCH) & ~CLBR_RET_REG) 39ac5672f8SJeremy Fitzhardinge 40ac5672f8SJeremy Fitzhardinge #ifndef __ASSEMBLY__ 41ac5672f8SJeremy Fitzhardinge 42ac5672f8SJeremy Fitzhardinge #include <asm/desc_defs.h> 43ac5672f8SJeremy Fitzhardinge #include <asm/kmap_types.h> 44ac5672f8SJeremy Fitzhardinge 45ac5672f8SJeremy Fitzhardinge struct page; 46ac5672f8SJeremy Fitzhardinge struct thread_struct; 47ac5672f8SJeremy Fitzhardinge struct desc_ptr; 48ac5672f8SJeremy Fitzhardinge struct tss_struct; 49ac5672f8SJeremy Fitzhardinge struct mm_struct; 50ac5672f8SJeremy Fitzhardinge struct desc_struct; 51ac5672f8SJeremy Fitzhardinge struct task_struct; 52ac5672f8SJeremy Fitzhardinge struct cpumask; 53ac5672f8SJeremy Fitzhardinge 54ac5672f8SJeremy Fitzhardinge /* 55ac5672f8SJeremy Fitzhardinge * Wrapper type for pointers to code which uses the non-standard 56ac5672f8SJeremy Fitzhardinge * calling convention. See PV_CALL_SAVE_REGS_THUNK below. 57ac5672f8SJeremy Fitzhardinge */ 58ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save { 59ac5672f8SJeremy Fitzhardinge void *func; 60ac5672f8SJeremy Fitzhardinge }; 61ac5672f8SJeremy Fitzhardinge 62ac5672f8SJeremy Fitzhardinge /* general info */ 63ac5672f8SJeremy Fitzhardinge struct pv_info { 64ac5672f8SJeremy Fitzhardinge unsigned int kernel_rpl; 65ac5672f8SJeremy Fitzhardinge int shared_kernel_pmd; 66ac5672f8SJeremy Fitzhardinge int paravirt_enabled; 67ac5672f8SJeremy Fitzhardinge const char *name; 68ac5672f8SJeremy Fitzhardinge }; 69ac5672f8SJeremy Fitzhardinge 70ac5672f8SJeremy Fitzhardinge struct pv_init_ops { 71ac5672f8SJeremy Fitzhardinge /* 72ac5672f8SJeremy Fitzhardinge * Patch may replace one of the defined code sequences with 73ac5672f8SJeremy Fitzhardinge * arbitrary code, subject to the same register constraints. 74ac5672f8SJeremy Fitzhardinge * This generally means the code is not free to clobber any 75ac5672f8SJeremy Fitzhardinge * registers other than EAX. The patch function should return 76ac5672f8SJeremy Fitzhardinge * the number of bytes of code generated, as we nop pad the 77ac5672f8SJeremy Fitzhardinge * rest in generic code. 78ac5672f8SJeremy Fitzhardinge */ 79ac5672f8SJeremy Fitzhardinge unsigned (*patch)(u8 type, u16 clobber, void *insnbuf, 80ac5672f8SJeremy Fitzhardinge unsigned long addr, unsigned len); 81ac5672f8SJeremy Fitzhardinge }; 82ac5672f8SJeremy Fitzhardinge 83ac5672f8SJeremy Fitzhardinge 84ac5672f8SJeremy Fitzhardinge struct pv_lazy_ops { 85ac5672f8SJeremy Fitzhardinge /* Set deferred update mode, used for batching operations. */ 86ac5672f8SJeremy Fitzhardinge void (*enter)(void); 87ac5672f8SJeremy Fitzhardinge void (*leave)(void); 88ac5672f8SJeremy Fitzhardinge }; 89ac5672f8SJeremy Fitzhardinge 90ac5672f8SJeremy Fitzhardinge struct pv_time_ops { 91ac5672f8SJeremy Fitzhardinge unsigned long long (*sched_clock)(void); 92ac5672f8SJeremy Fitzhardinge unsigned long (*get_tsc_khz)(void); 93ac5672f8SJeremy Fitzhardinge }; 94ac5672f8SJeremy Fitzhardinge 95ac5672f8SJeremy Fitzhardinge struct pv_cpu_ops { 96ac5672f8SJeremy Fitzhardinge /* hooks for various privileged instructions */ 97ac5672f8SJeremy Fitzhardinge unsigned long (*get_debugreg)(int regno); 98ac5672f8SJeremy Fitzhardinge void (*set_debugreg)(int regno, unsigned long value); 99ac5672f8SJeremy Fitzhardinge 100ac5672f8SJeremy Fitzhardinge void (*clts)(void); 101ac5672f8SJeremy Fitzhardinge 102ac5672f8SJeremy Fitzhardinge unsigned long (*read_cr0)(void); 103ac5672f8SJeremy Fitzhardinge void (*write_cr0)(unsigned long); 104ac5672f8SJeremy Fitzhardinge 105ac5672f8SJeremy Fitzhardinge unsigned long (*read_cr4_safe)(void); 106ac5672f8SJeremy Fitzhardinge unsigned long (*read_cr4)(void); 107ac5672f8SJeremy Fitzhardinge void (*write_cr4)(unsigned long); 108ac5672f8SJeremy Fitzhardinge 109ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_X86_64 110ac5672f8SJeremy Fitzhardinge unsigned long (*read_cr8)(void); 111ac5672f8SJeremy Fitzhardinge void (*write_cr8)(unsigned long); 112ac5672f8SJeremy Fitzhardinge #endif 113ac5672f8SJeremy Fitzhardinge 114ac5672f8SJeremy Fitzhardinge /* Segment descriptor handling */ 115ac5672f8SJeremy Fitzhardinge void (*load_tr_desc)(void); 116ac5672f8SJeremy Fitzhardinge void (*load_gdt)(const struct desc_ptr *); 117ac5672f8SJeremy Fitzhardinge void (*load_idt)(const struct desc_ptr *); 118ac5672f8SJeremy Fitzhardinge void (*store_gdt)(struct desc_ptr *); 119ac5672f8SJeremy Fitzhardinge void (*store_idt)(struct desc_ptr *); 120ac5672f8SJeremy Fitzhardinge void (*set_ldt)(const void *desc, unsigned entries); 121ac5672f8SJeremy Fitzhardinge unsigned long (*store_tr)(void); 122ac5672f8SJeremy Fitzhardinge void (*load_tls)(struct thread_struct *t, unsigned int cpu); 123ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_X86_64 124ac5672f8SJeremy Fitzhardinge void (*load_gs_index)(unsigned int idx); 125ac5672f8SJeremy Fitzhardinge #endif 126ac5672f8SJeremy Fitzhardinge void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum, 127ac5672f8SJeremy Fitzhardinge const void *desc); 128ac5672f8SJeremy Fitzhardinge void (*write_gdt_entry)(struct desc_struct *, 129ac5672f8SJeremy Fitzhardinge int entrynum, const void *desc, int size); 130ac5672f8SJeremy Fitzhardinge void (*write_idt_entry)(gate_desc *, 131ac5672f8SJeremy Fitzhardinge int entrynum, const gate_desc *gate); 132ac5672f8SJeremy Fitzhardinge void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries); 133ac5672f8SJeremy Fitzhardinge void (*free_ldt)(struct desc_struct *ldt, unsigned entries); 134ac5672f8SJeremy Fitzhardinge 135ac5672f8SJeremy Fitzhardinge void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t); 136ac5672f8SJeremy Fitzhardinge 137ac5672f8SJeremy Fitzhardinge void (*set_iopl_mask)(unsigned mask); 138ac5672f8SJeremy Fitzhardinge 139ac5672f8SJeremy Fitzhardinge void (*wbinvd)(void); 140ac5672f8SJeremy Fitzhardinge void (*io_delay)(void); 141ac5672f8SJeremy Fitzhardinge 142ac5672f8SJeremy Fitzhardinge /* cpuid emulation, mostly so that caps bits can be disabled */ 143ac5672f8SJeremy Fitzhardinge void (*cpuid)(unsigned int *eax, unsigned int *ebx, 144ac5672f8SJeremy Fitzhardinge unsigned int *ecx, unsigned int *edx); 145ac5672f8SJeremy Fitzhardinge 146ac5672f8SJeremy Fitzhardinge /* MSR, PMC and TSR operations. 147ac5672f8SJeremy Fitzhardinge err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */ 148ac5672f8SJeremy Fitzhardinge u64 (*read_msr)(unsigned int msr, int *err); 149c931aaf0SIngo Molnar int (*rdmsr_regs)(u32 *regs); 150ac5672f8SJeremy Fitzhardinge int (*write_msr)(unsigned int msr, unsigned low, unsigned high); 151c931aaf0SIngo Molnar int (*wrmsr_regs)(u32 *regs); 152ac5672f8SJeremy Fitzhardinge 153ac5672f8SJeremy Fitzhardinge u64 (*read_tsc)(void); 154ac5672f8SJeremy Fitzhardinge u64 (*read_pmc)(int counter); 155ac5672f8SJeremy Fitzhardinge unsigned long long (*read_tscp)(unsigned int *aux); 156ac5672f8SJeremy Fitzhardinge 157ac5672f8SJeremy Fitzhardinge /* 158ac5672f8SJeremy Fitzhardinge * Atomically enable interrupts and return to userspace. This 159ac5672f8SJeremy Fitzhardinge * is only ever used to return to 32-bit processes; in a 160ac5672f8SJeremy Fitzhardinge * 64-bit kernel, it's used for 32-on-64 compat processes, but 161ac5672f8SJeremy Fitzhardinge * never native 64-bit processes. (Jump, not call.) 162ac5672f8SJeremy Fitzhardinge */ 163ac5672f8SJeremy Fitzhardinge void (*irq_enable_sysexit)(void); 164ac5672f8SJeremy Fitzhardinge 165ac5672f8SJeremy Fitzhardinge /* 166ac5672f8SJeremy Fitzhardinge * Switch to usermode gs and return to 64-bit usermode using 167ac5672f8SJeremy Fitzhardinge * sysret. Only used in 64-bit kernels to return to 64-bit 168ac5672f8SJeremy Fitzhardinge * processes. Usermode register state, including %rsp, must 169ac5672f8SJeremy Fitzhardinge * already be restored. 170ac5672f8SJeremy Fitzhardinge */ 171ac5672f8SJeremy Fitzhardinge void (*usergs_sysret64)(void); 172ac5672f8SJeremy Fitzhardinge 173ac5672f8SJeremy Fitzhardinge /* 174ac5672f8SJeremy Fitzhardinge * Switch to usermode gs and return to 32-bit usermode using 175ac5672f8SJeremy Fitzhardinge * sysret. Used to return to 32-on-64 compat processes. 176ac5672f8SJeremy Fitzhardinge * Other usermode register state, including %esp, must already 177ac5672f8SJeremy Fitzhardinge * be restored. 178ac5672f8SJeremy Fitzhardinge */ 179ac5672f8SJeremy Fitzhardinge void (*usergs_sysret32)(void); 180ac5672f8SJeremy Fitzhardinge 181ac5672f8SJeremy Fitzhardinge /* Normal iret. Jump to this with the standard iret stack 182ac5672f8SJeremy Fitzhardinge frame set up. */ 183ac5672f8SJeremy Fitzhardinge void (*iret)(void); 184ac5672f8SJeremy Fitzhardinge 185ac5672f8SJeremy Fitzhardinge void (*swapgs)(void); 186ac5672f8SJeremy Fitzhardinge 187ac5672f8SJeremy Fitzhardinge void (*start_context_switch)(struct task_struct *prev); 188ac5672f8SJeremy Fitzhardinge void (*end_context_switch)(struct task_struct *next); 189ac5672f8SJeremy Fitzhardinge }; 190ac5672f8SJeremy Fitzhardinge 191ac5672f8SJeremy Fitzhardinge struct pv_irq_ops { 192ac5672f8SJeremy Fitzhardinge /* 193ac5672f8SJeremy Fitzhardinge * Get/set interrupt state. save_fl and restore_fl are only 194ac5672f8SJeremy Fitzhardinge * expected to use X86_EFLAGS_IF; all other bits 195ac5672f8SJeremy Fitzhardinge * returned from save_fl are undefined, and may be ignored by 196ac5672f8SJeremy Fitzhardinge * restore_fl. 197ac5672f8SJeremy Fitzhardinge * 198ac5672f8SJeremy Fitzhardinge * NOTE: These functions callers expect the callee to preserve 199ac5672f8SJeremy Fitzhardinge * more registers than the standard C calling convention. 200ac5672f8SJeremy Fitzhardinge */ 201ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save save_fl; 202ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save restore_fl; 203ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save irq_disable; 204ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save irq_enable; 205ac5672f8SJeremy Fitzhardinge 206ac5672f8SJeremy Fitzhardinge void (*safe_halt)(void); 207ac5672f8SJeremy Fitzhardinge void (*halt)(void); 208ac5672f8SJeremy Fitzhardinge 209ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_X86_64 210ac5672f8SJeremy Fitzhardinge void (*adjust_exception_frame)(void); 211ac5672f8SJeremy Fitzhardinge #endif 212ac5672f8SJeremy Fitzhardinge }; 213ac5672f8SJeremy Fitzhardinge 214ac5672f8SJeremy Fitzhardinge struct pv_apic_ops { 215ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_X86_LOCAL_APIC 216ac5672f8SJeremy Fitzhardinge void (*startup_ipi_hook)(int phys_apicid, 217ac5672f8SJeremy Fitzhardinge unsigned long start_eip, 218ac5672f8SJeremy Fitzhardinge unsigned long start_esp); 219ac5672f8SJeremy Fitzhardinge #endif 220ac5672f8SJeremy Fitzhardinge }; 221ac5672f8SJeremy Fitzhardinge 222ac5672f8SJeremy Fitzhardinge struct pv_mmu_ops { 223ac5672f8SJeremy Fitzhardinge unsigned long (*read_cr2)(void); 224ac5672f8SJeremy Fitzhardinge void (*write_cr2)(unsigned long); 225ac5672f8SJeremy Fitzhardinge 226ac5672f8SJeremy Fitzhardinge unsigned long (*read_cr3)(void); 227ac5672f8SJeremy Fitzhardinge void (*write_cr3)(unsigned long); 228ac5672f8SJeremy Fitzhardinge 229ac5672f8SJeremy Fitzhardinge /* 230ac5672f8SJeremy Fitzhardinge * Hooks for intercepting the creation/use/destruction of an 231ac5672f8SJeremy Fitzhardinge * mm_struct. 232ac5672f8SJeremy Fitzhardinge */ 233ac5672f8SJeremy Fitzhardinge void (*activate_mm)(struct mm_struct *prev, 234ac5672f8SJeremy Fitzhardinge struct mm_struct *next); 235ac5672f8SJeremy Fitzhardinge void (*dup_mmap)(struct mm_struct *oldmm, 236ac5672f8SJeremy Fitzhardinge struct mm_struct *mm); 237ac5672f8SJeremy Fitzhardinge void (*exit_mmap)(struct mm_struct *mm); 238ac5672f8SJeremy Fitzhardinge 239ac5672f8SJeremy Fitzhardinge 240ac5672f8SJeremy Fitzhardinge /* TLB operations */ 241ac5672f8SJeremy Fitzhardinge void (*flush_tlb_user)(void); 242ac5672f8SJeremy Fitzhardinge void (*flush_tlb_kernel)(void); 243ac5672f8SJeremy Fitzhardinge void (*flush_tlb_single)(unsigned long addr); 244ac5672f8SJeremy Fitzhardinge void (*flush_tlb_others)(const struct cpumask *cpus, 245ac5672f8SJeremy Fitzhardinge struct mm_struct *mm, 246ac5672f8SJeremy Fitzhardinge unsigned long va); 247ac5672f8SJeremy Fitzhardinge 248ac5672f8SJeremy Fitzhardinge /* Hooks for allocating and freeing a pagetable top-level */ 249ac5672f8SJeremy Fitzhardinge int (*pgd_alloc)(struct mm_struct *mm); 250ac5672f8SJeremy Fitzhardinge void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd); 251ac5672f8SJeremy Fitzhardinge 252ac5672f8SJeremy Fitzhardinge /* 253ac5672f8SJeremy Fitzhardinge * Hooks for allocating/releasing pagetable pages when they're 254ac5672f8SJeremy Fitzhardinge * attached to a pagetable 255ac5672f8SJeremy Fitzhardinge */ 256ac5672f8SJeremy Fitzhardinge void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn); 257ac5672f8SJeremy Fitzhardinge void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn); 258ac5672f8SJeremy Fitzhardinge void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn); 259ac5672f8SJeremy Fitzhardinge void (*release_pte)(unsigned long pfn); 260ac5672f8SJeremy Fitzhardinge void (*release_pmd)(unsigned long pfn); 261ac5672f8SJeremy Fitzhardinge void (*release_pud)(unsigned long pfn); 262ac5672f8SJeremy Fitzhardinge 263ac5672f8SJeremy Fitzhardinge /* Pagetable manipulation functions */ 264ac5672f8SJeremy Fitzhardinge void (*set_pte)(pte_t *ptep, pte_t pteval); 265ac5672f8SJeremy Fitzhardinge void (*set_pte_at)(struct mm_struct *mm, unsigned long addr, 266ac5672f8SJeremy Fitzhardinge pte_t *ptep, pte_t pteval); 267ac5672f8SJeremy Fitzhardinge void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval); 268331127f7SAndrea Arcangeli void (*set_pmd_at)(struct mm_struct *mm, unsigned long addr, 269331127f7SAndrea Arcangeli pmd_t *pmdp, pmd_t pmdval); 270ac5672f8SJeremy Fitzhardinge void (*pte_update)(struct mm_struct *mm, unsigned long addr, 271ac5672f8SJeremy Fitzhardinge pte_t *ptep); 272ac5672f8SJeremy Fitzhardinge void (*pte_update_defer)(struct mm_struct *mm, 273ac5672f8SJeremy Fitzhardinge unsigned long addr, pte_t *ptep); 274331127f7SAndrea Arcangeli void (*pmd_update)(struct mm_struct *mm, unsigned long addr, 275331127f7SAndrea Arcangeli pmd_t *pmdp); 276331127f7SAndrea Arcangeli void (*pmd_update_defer)(struct mm_struct *mm, 277331127f7SAndrea Arcangeli unsigned long addr, pmd_t *pmdp); 278ac5672f8SJeremy Fitzhardinge 279ac5672f8SJeremy Fitzhardinge pte_t (*ptep_modify_prot_start)(struct mm_struct *mm, unsigned long addr, 280ac5672f8SJeremy Fitzhardinge pte_t *ptep); 281ac5672f8SJeremy Fitzhardinge void (*ptep_modify_prot_commit)(struct mm_struct *mm, unsigned long addr, 282ac5672f8SJeremy Fitzhardinge pte_t *ptep, pte_t pte); 283ac5672f8SJeremy Fitzhardinge 284ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save pte_val; 285ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save make_pte; 286ac5672f8SJeremy Fitzhardinge 287ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save pgd_val; 288ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save make_pgd; 289ac5672f8SJeremy Fitzhardinge 290ac5672f8SJeremy Fitzhardinge #if PAGETABLE_LEVELS >= 3 291ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_X86_PAE 292ac5672f8SJeremy Fitzhardinge void (*set_pte_atomic)(pte_t *ptep, pte_t pteval); 293ac5672f8SJeremy Fitzhardinge void (*pte_clear)(struct mm_struct *mm, unsigned long addr, 294ac5672f8SJeremy Fitzhardinge pte_t *ptep); 295ac5672f8SJeremy Fitzhardinge void (*pmd_clear)(pmd_t *pmdp); 296ac5672f8SJeremy Fitzhardinge 297ac5672f8SJeremy Fitzhardinge #endif /* CONFIG_X86_PAE */ 298ac5672f8SJeremy Fitzhardinge 299ac5672f8SJeremy Fitzhardinge void (*set_pud)(pud_t *pudp, pud_t pudval); 300ac5672f8SJeremy Fitzhardinge 301ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save pmd_val; 302ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save make_pmd; 303ac5672f8SJeremy Fitzhardinge 304ac5672f8SJeremy Fitzhardinge #if PAGETABLE_LEVELS == 4 305ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save pud_val; 306ac5672f8SJeremy Fitzhardinge struct paravirt_callee_save make_pud; 307ac5672f8SJeremy Fitzhardinge 308ac5672f8SJeremy Fitzhardinge void (*set_pgd)(pgd_t *pudp, pgd_t pgdval); 309ac5672f8SJeremy Fitzhardinge #endif /* PAGETABLE_LEVELS == 4 */ 310ac5672f8SJeremy Fitzhardinge #endif /* PAGETABLE_LEVELS >= 3 */ 311ac5672f8SJeremy Fitzhardinge 312ac5672f8SJeremy Fitzhardinge struct pv_lazy_ops lazy_mode; 313ac5672f8SJeremy Fitzhardinge 314ac5672f8SJeremy Fitzhardinge /* dom0 ops */ 315ac5672f8SJeremy Fitzhardinge 316ac5672f8SJeremy Fitzhardinge /* Sometimes the physical address is a pfn, and sometimes its 317ac5672f8SJeremy Fitzhardinge an mfn. We can tell which is which from the index. */ 318ac5672f8SJeremy Fitzhardinge void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx, 319ac5672f8SJeremy Fitzhardinge phys_addr_t phys, pgprot_t flags); 320ac5672f8SJeremy Fitzhardinge }; 321ac5672f8SJeremy Fitzhardinge 322445c8951SThomas Gleixner struct arch_spinlock; 323ac5672f8SJeremy Fitzhardinge struct pv_lock_ops { 324445c8951SThomas Gleixner int (*spin_is_locked)(struct arch_spinlock *lock); 325445c8951SThomas Gleixner int (*spin_is_contended)(struct arch_spinlock *lock); 326445c8951SThomas Gleixner void (*spin_lock)(struct arch_spinlock *lock); 327445c8951SThomas Gleixner void (*spin_lock_flags)(struct arch_spinlock *lock, unsigned long flags); 328445c8951SThomas Gleixner int (*spin_trylock)(struct arch_spinlock *lock); 329445c8951SThomas Gleixner void (*spin_unlock)(struct arch_spinlock *lock); 330ac5672f8SJeremy Fitzhardinge }; 331ac5672f8SJeremy Fitzhardinge 332ac5672f8SJeremy Fitzhardinge /* This contains all the paravirt structures: we get a convenient 333ac5672f8SJeremy Fitzhardinge * number for each function using the offset which we use to indicate 334ac5672f8SJeremy Fitzhardinge * what to patch. */ 335ac5672f8SJeremy Fitzhardinge struct paravirt_patch_template { 336ac5672f8SJeremy Fitzhardinge struct pv_init_ops pv_init_ops; 337ac5672f8SJeremy Fitzhardinge struct pv_time_ops pv_time_ops; 338ac5672f8SJeremy Fitzhardinge struct pv_cpu_ops pv_cpu_ops; 339ac5672f8SJeremy Fitzhardinge struct pv_irq_ops pv_irq_ops; 340ac5672f8SJeremy Fitzhardinge struct pv_apic_ops pv_apic_ops; 341ac5672f8SJeremy Fitzhardinge struct pv_mmu_ops pv_mmu_ops; 342ac5672f8SJeremy Fitzhardinge struct pv_lock_ops pv_lock_ops; 343ac5672f8SJeremy Fitzhardinge }; 344ac5672f8SJeremy Fitzhardinge 345ac5672f8SJeremy Fitzhardinge extern struct pv_info pv_info; 346ac5672f8SJeremy Fitzhardinge extern struct pv_init_ops pv_init_ops; 347ac5672f8SJeremy Fitzhardinge extern struct pv_time_ops pv_time_ops; 348ac5672f8SJeremy Fitzhardinge extern struct pv_cpu_ops pv_cpu_ops; 349ac5672f8SJeremy Fitzhardinge extern struct pv_irq_ops pv_irq_ops; 350ac5672f8SJeremy Fitzhardinge extern struct pv_apic_ops pv_apic_ops; 351ac5672f8SJeremy Fitzhardinge extern struct pv_mmu_ops pv_mmu_ops; 352ac5672f8SJeremy Fitzhardinge extern struct pv_lock_ops pv_lock_ops; 353ac5672f8SJeremy Fitzhardinge 354ac5672f8SJeremy Fitzhardinge #define PARAVIRT_PATCH(x) \ 355ac5672f8SJeremy Fitzhardinge (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) 356ac5672f8SJeremy Fitzhardinge 357ac5672f8SJeremy Fitzhardinge #define paravirt_type(op) \ 358ac5672f8SJeremy Fitzhardinge [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \ 359ac5672f8SJeremy Fitzhardinge [paravirt_opptr] "i" (&(op)) 360ac5672f8SJeremy Fitzhardinge #define paravirt_clobber(clobber) \ 361ac5672f8SJeremy Fitzhardinge [paravirt_clobber] "i" (clobber) 362ac5672f8SJeremy Fitzhardinge 363ac5672f8SJeremy Fitzhardinge /* 364ac5672f8SJeremy Fitzhardinge * Generate some code, and mark it as patchable by the 365ac5672f8SJeremy Fitzhardinge * apply_paravirt() alternate instruction patcher. 366ac5672f8SJeremy Fitzhardinge */ 367ac5672f8SJeremy Fitzhardinge #define _paravirt_alt(insn_string, type, clobber) \ 368ac5672f8SJeremy Fitzhardinge "771:\n\t" insn_string "\n" "772:\n" \ 369ac5672f8SJeremy Fitzhardinge ".pushsection .parainstructions,\"a\"\n" \ 370ac5672f8SJeremy Fitzhardinge _ASM_ALIGN "\n" \ 371ac5672f8SJeremy Fitzhardinge _ASM_PTR " 771b\n" \ 372ac5672f8SJeremy Fitzhardinge " .byte " type "\n" \ 373ac5672f8SJeremy Fitzhardinge " .byte 772b-771b\n" \ 374ac5672f8SJeremy Fitzhardinge " .short " clobber "\n" \ 375ac5672f8SJeremy Fitzhardinge ".popsection\n" 376ac5672f8SJeremy Fitzhardinge 377ac5672f8SJeremy Fitzhardinge /* Generate patchable code, with the default asm parameters. */ 378ac5672f8SJeremy Fitzhardinge #define paravirt_alt(insn_string) \ 379ac5672f8SJeremy Fitzhardinge _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]") 380ac5672f8SJeremy Fitzhardinge 381ac5672f8SJeremy Fitzhardinge /* Simple instruction patching code. */ 382ac5672f8SJeremy Fitzhardinge #define DEF_NATIVE(ops, name, code) \ 383ac5672f8SJeremy Fitzhardinge extern const char start_##ops##_##name[], end_##ops##_##name[]; \ 384ac5672f8SJeremy Fitzhardinge asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":") 385ac5672f8SJeremy Fitzhardinge 386ac5672f8SJeremy Fitzhardinge unsigned paravirt_patch_nop(void); 387ac5672f8SJeremy Fitzhardinge unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len); 388ac5672f8SJeremy Fitzhardinge unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len); 389ac5672f8SJeremy Fitzhardinge unsigned paravirt_patch_ignore(unsigned len); 390ac5672f8SJeremy Fitzhardinge unsigned paravirt_patch_call(void *insnbuf, 391ac5672f8SJeremy Fitzhardinge const void *target, u16 tgt_clobbers, 392ac5672f8SJeremy Fitzhardinge unsigned long addr, u16 site_clobbers, 393ac5672f8SJeremy Fitzhardinge unsigned len); 394ac5672f8SJeremy Fitzhardinge unsigned paravirt_patch_jmp(void *insnbuf, const void *target, 395ac5672f8SJeremy Fitzhardinge unsigned long addr, unsigned len); 396ac5672f8SJeremy Fitzhardinge unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf, 397ac5672f8SJeremy Fitzhardinge unsigned long addr, unsigned len); 398ac5672f8SJeremy Fitzhardinge 399ac5672f8SJeremy Fitzhardinge unsigned paravirt_patch_insns(void *insnbuf, unsigned len, 400ac5672f8SJeremy Fitzhardinge const char *start, const char *end); 401ac5672f8SJeremy Fitzhardinge 402ac5672f8SJeremy Fitzhardinge unsigned native_patch(u8 type, u16 clobbers, void *ibuf, 403ac5672f8SJeremy Fitzhardinge unsigned long addr, unsigned len); 404ac5672f8SJeremy Fitzhardinge 405ac5672f8SJeremy Fitzhardinge int paravirt_disable_iospace(void); 406ac5672f8SJeremy Fitzhardinge 407ac5672f8SJeremy Fitzhardinge /* 408ac5672f8SJeremy Fitzhardinge * This generates an indirect call based on the operation type number. 409ac5672f8SJeremy Fitzhardinge * The type number, computed in PARAVIRT_PATCH, is derived from the 410ac5672f8SJeremy Fitzhardinge * offset into the paravirt_patch_template structure, and can therefore be 411ac5672f8SJeremy Fitzhardinge * freely converted back into a structure offset. 412ac5672f8SJeremy Fitzhardinge */ 413ac5672f8SJeremy Fitzhardinge #define PARAVIRT_CALL "call *%c[paravirt_opptr];" 414ac5672f8SJeremy Fitzhardinge 415ac5672f8SJeremy Fitzhardinge /* 416ac5672f8SJeremy Fitzhardinge * These macros are intended to wrap calls through one of the paravirt 417ac5672f8SJeremy Fitzhardinge * ops structs, so that they can be later identified and patched at 418ac5672f8SJeremy Fitzhardinge * runtime. 419ac5672f8SJeremy Fitzhardinge * 420ac5672f8SJeremy Fitzhardinge * Normally, a call to a pv_op function is a simple indirect call: 421ac5672f8SJeremy Fitzhardinge * (pv_op_struct.operations)(args...). 422ac5672f8SJeremy Fitzhardinge * 423ac5672f8SJeremy Fitzhardinge * Unfortunately, this is a relatively slow operation for modern CPUs, 424ac5672f8SJeremy Fitzhardinge * because it cannot necessarily determine what the destination 425ac5672f8SJeremy Fitzhardinge * address is. In this case, the address is a runtime constant, so at 426ac5672f8SJeremy Fitzhardinge * the very least we can patch the call to e a simple direct call, or 427ac5672f8SJeremy Fitzhardinge * ideally, patch an inline implementation into the callsite. (Direct 428ac5672f8SJeremy Fitzhardinge * calls are essentially free, because the call and return addresses 429ac5672f8SJeremy Fitzhardinge * are completely predictable.) 430ac5672f8SJeremy Fitzhardinge * 431ac5672f8SJeremy Fitzhardinge * For i386, these macros rely on the standard gcc "regparm(3)" calling 432ac5672f8SJeremy Fitzhardinge * convention, in which the first three arguments are placed in %eax, 433ac5672f8SJeremy Fitzhardinge * %edx, %ecx (in that order), and the remaining arguments are placed 434ac5672f8SJeremy Fitzhardinge * on the stack. All caller-save registers (eax,edx,ecx) are expected 435ac5672f8SJeremy Fitzhardinge * to be modified (either clobbered or used for return values). 436ac5672f8SJeremy Fitzhardinge * X86_64, on the other hand, already specifies a register-based calling 437ac5672f8SJeremy Fitzhardinge * conventions, returning at %rax, with parameteres going on %rdi, %rsi, 438ac5672f8SJeremy Fitzhardinge * %rdx, and %rcx. Note that for this reason, x86_64 does not need any 439ac5672f8SJeremy Fitzhardinge * special handling for dealing with 4 arguments, unlike i386. 440ac5672f8SJeremy Fitzhardinge * However, x86_64 also have to clobber all caller saved registers, which 441ac5672f8SJeremy Fitzhardinge * unfortunately, are quite a bit (r8 - r11) 442ac5672f8SJeremy Fitzhardinge * 443ac5672f8SJeremy Fitzhardinge * The call instruction itself is marked by placing its start address 444ac5672f8SJeremy Fitzhardinge * and size into the .parainstructions section, so that 445ac5672f8SJeremy Fitzhardinge * apply_paravirt() in arch/i386/kernel/alternative.c can do the 446ac5672f8SJeremy Fitzhardinge * appropriate patching under the control of the backend pv_init_ops 447ac5672f8SJeremy Fitzhardinge * implementation. 448ac5672f8SJeremy Fitzhardinge * 449ac5672f8SJeremy Fitzhardinge * Unfortunately there's no way to get gcc to generate the args setup 450ac5672f8SJeremy Fitzhardinge * for the call, and then allow the call itself to be generated by an 451ac5672f8SJeremy Fitzhardinge * inline asm. Because of this, we must do the complete arg setup and 452ac5672f8SJeremy Fitzhardinge * return value handling from within these macros. This is fairly 453ac5672f8SJeremy Fitzhardinge * cumbersome. 454ac5672f8SJeremy Fitzhardinge * 455ac5672f8SJeremy Fitzhardinge * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments. 456ac5672f8SJeremy Fitzhardinge * It could be extended to more arguments, but there would be little 457ac5672f8SJeremy Fitzhardinge * to be gained from that. For each number of arguments, there are 458ac5672f8SJeremy Fitzhardinge * the two VCALL and CALL variants for void and non-void functions. 459ac5672f8SJeremy Fitzhardinge * 460ac5672f8SJeremy Fitzhardinge * When there is a return value, the invoker of the macro must specify 461ac5672f8SJeremy Fitzhardinge * the return type. The macro then uses sizeof() on that type to 462ac5672f8SJeremy Fitzhardinge * determine whether its a 32 or 64 bit value, and places the return 463ac5672f8SJeremy Fitzhardinge * in the right register(s) (just %eax for 32-bit, and %edx:%eax for 464ac5672f8SJeremy Fitzhardinge * 64-bit). For x86_64 machines, it just returns at %rax regardless of 465ac5672f8SJeremy Fitzhardinge * the return value size. 466ac5672f8SJeremy Fitzhardinge * 467ac5672f8SJeremy Fitzhardinge * 64-bit arguments are passed as a pair of adjacent 32-bit arguments 468ac5672f8SJeremy Fitzhardinge * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments 469ac5672f8SJeremy Fitzhardinge * in low,high order 470ac5672f8SJeremy Fitzhardinge * 471ac5672f8SJeremy Fitzhardinge * Small structures are passed and returned in registers. The macro 472ac5672f8SJeremy Fitzhardinge * calling convention can't directly deal with this, so the wrapper 473ac5672f8SJeremy Fitzhardinge * functions must do this. 474ac5672f8SJeremy Fitzhardinge * 475ac5672f8SJeremy Fitzhardinge * These PVOP_* macros are only defined within this header. This 476ac5672f8SJeremy Fitzhardinge * means that all uses must be wrapped in inline functions. This also 477ac5672f8SJeremy Fitzhardinge * makes sure the incoming and outgoing types are always correct. 478ac5672f8SJeremy Fitzhardinge */ 479ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_X86_32 480ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL_ARGS \ 481ac5672f8SJeremy Fitzhardinge unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx 482ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARGS PVOP_VCALL_ARGS 483ac5672f8SJeremy Fitzhardinge 484ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x)) 485ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x)) 486ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x)) 487ac5672f8SJeremy Fitzhardinge 488ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \ 489ac5672f8SJeremy Fitzhardinge "=c" (__ecx) 490ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS 491ac5672f8SJeremy Fitzhardinge 492ac5672f8SJeremy Fitzhardinge #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx) 493ac5672f8SJeremy Fitzhardinge #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 494ac5672f8SJeremy Fitzhardinge 495ac5672f8SJeremy Fitzhardinge #define EXTRA_CLOBBERS 496ac5672f8SJeremy Fitzhardinge #define VEXTRA_CLOBBERS 497ac5672f8SJeremy Fitzhardinge #else /* CONFIG_X86_64 */ 49871999d98SJeremy Fitzhardinge /* [re]ax isn't an arg, but the return val */ 499ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL_ARGS \ 500ac5672f8SJeremy Fitzhardinge unsigned long __edi = __edi, __esi = __esi, \ 50171999d98SJeremy Fitzhardinge __edx = __edx, __ecx = __ecx, __eax = __eax 50271999d98SJeremy Fitzhardinge #define PVOP_CALL_ARGS PVOP_VCALL_ARGS 503ac5672f8SJeremy Fitzhardinge 504ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x)) 505ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x)) 506ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x)) 507ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x)) 508ac5672f8SJeremy Fitzhardinge 509ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL_CLOBBERS "=D" (__edi), \ 510ac5672f8SJeremy Fitzhardinge "=S" (__esi), "=d" (__edx), \ 511ac5672f8SJeremy Fitzhardinge "=c" (__ecx) 512ac5672f8SJeremy Fitzhardinge #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax) 513ac5672f8SJeremy Fitzhardinge 51471999d98SJeremy Fitzhardinge /* void functions are still allowed [re]ax for scratch */ 515ac5672f8SJeremy Fitzhardinge #define PVOP_VCALLEE_CLOBBERS "=a" (__eax) 516ac5672f8SJeremy Fitzhardinge #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS 517ac5672f8SJeremy Fitzhardinge 518ac5672f8SJeremy Fitzhardinge #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11" 519ac5672f8SJeremy Fitzhardinge #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11" 520ac5672f8SJeremy Fitzhardinge #endif /* CONFIG_X86_32 */ 521ac5672f8SJeremy Fitzhardinge 522ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_PARAVIRT_DEBUG 523ac5672f8SJeremy Fitzhardinge #define PVOP_TEST_NULL(op) BUG_ON(op == NULL) 524ac5672f8SJeremy Fitzhardinge #else 525ac5672f8SJeremy Fitzhardinge #define PVOP_TEST_NULL(op) ((void)op) 526ac5672f8SJeremy Fitzhardinge #endif 527ac5672f8SJeremy Fitzhardinge 528ac5672f8SJeremy Fitzhardinge #define ____PVOP_CALL(rettype, op, clbr, call_clbr, extra_clbr, \ 529ac5672f8SJeremy Fitzhardinge pre, post, ...) \ 530ac5672f8SJeremy Fitzhardinge ({ \ 531ac5672f8SJeremy Fitzhardinge rettype __ret; \ 532ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARGS; \ 533ac5672f8SJeremy Fitzhardinge PVOP_TEST_NULL(op); \ 534ac5672f8SJeremy Fitzhardinge /* This is 32-bit specific, but is okay in 64-bit */ \ 535ac5672f8SJeremy Fitzhardinge /* since this condition will never hold */ \ 536ac5672f8SJeremy Fitzhardinge if (sizeof(rettype) > sizeof(unsigned long)) { \ 537ac5672f8SJeremy Fitzhardinge asm volatile(pre \ 538ac5672f8SJeremy Fitzhardinge paravirt_alt(PARAVIRT_CALL) \ 539ac5672f8SJeremy Fitzhardinge post \ 540ac5672f8SJeremy Fitzhardinge : call_clbr \ 541ac5672f8SJeremy Fitzhardinge : paravirt_type(op), \ 542ac5672f8SJeremy Fitzhardinge paravirt_clobber(clbr), \ 543ac5672f8SJeremy Fitzhardinge ##__VA_ARGS__ \ 544ac5672f8SJeremy Fitzhardinge : "memory", "cc" extra_clbr); \ 545ac5672f8SJeremy Fitzhardinge __ret = (rettype)((((u64)__edx) << 32) | __eax); \ 546ac5672f8SJeremy Fitzhardinge } else { \ 547ac5672f8SJeremy Fitzhardinge asm volatile(pre \ 548ac5672f8SJeremy Fitzhardinge paravirt_alt(PARAVIRT_CALL) \ 549ac5672f8SJeremy Fitzhardinge post \ 550ac5672f8SJeremy Fitzhardinge : call_clbr \ 551ac5672f8SJeremy Fitzhardinge : paravirt_type(op), \ 552ac5672f8SJeremy Fitzhardinge paravirt_clobber(clbr), \ 553ac5672f8SJeremy Fitzhardinge ##__VA_ARGS__ \ 554ac5672f8SJeremy Fitzhardinge : "memory", "cc" extra_clbr); \ 555ac5672f8SJeremy Fitzhardinge __ret = (rettype)__eax; \ 556ac5672f8SJeremy Fitzhardinge } \ 557ac5672f8SJeremy Fitzhardinge __ret; \ 558ac5672f8SJeremy Fitzhardinge }) 559ac5672f8SJeremy Fitzhardinge 560ac5672f8SJeremy Fitzhardinge #define __PVOP_CALL(rettype, op, pre, post, ...) \ 561ac5672f8SJeremy Fitzhardinge ____PVOP_CALL(rettype, op, CLBR_ANY, PVOP_CALL_CLOBBERS, \ 562ac5672f8SJeremy Fitzhardinge EXTRA_CLOBBERS, pre, post, ##__VA_ARGS__) 563ac5672f8SJeremy Fitzhardinge 564ac5672f8SJeremy Fitzhardinge #define __PVOP_CALLEESAVE(rettype, op, pre, post, ...) \ 565ac5672f8SJeremy Fitzhardinge ____PVOP_CALL(rettype, op.func, CLBR_RET_REG, \ 566ac5672f8SJeremy Fitzhardinge PVOP_CALLEE_CLOBBERS, , \ 567ac5672f8SJeremy Fitzhardinge pre, post, ##__VA_ARGS__) 568ac5672f8SJeremy Fitzhardinge 569ac5672f8SJeremy Fitzhardinge 570ac5672f8SJeremy Fitzhardinge #define ____PVOP_VCALL(op, clbr, call_clbr, extra_clbr, pre, post, ...) \ 571ac5672f8SJeremy Fitzhardinge ({ \ 572ac5672f8SJeremy Fitzhardinge PVOP_VCALL_ARGS; \ 573ac5672f8SJeremy Fitzhardinge PVOP_TEST_NULL(op); \ 574ac5672f8SJeremy Fitzhardinge asm volatile(pre \ 575ac5672f8SJeremy Fitzhardinge paravirt_alt(PARAVIRT_CALL) \ 576ac5672f8SJeremy Fitzhardinge post \ 577ac5672f8SJeremy Fitzhardinge : call_clbr \ 578ac5672f8SJeremy Fitzhardinge : paravirt_type(op), \ 579ac5672f8SJeremy Fitzhardinge paravirt_clobber(clbr), \ 580ac5672f8SJeremy Fitzhardinge ##__VA_ARGS__ \ 581ac5672f8SJeremy Fitzhardinge : "memory", "cc" extra_clbr); \ 582ac5672f8SJeremy Fitzhardinge }) 583ac5672f8SJeremy Fitzhardinge 584ac5672f8SJeremy Fitzhardinge #define __PVOP_VCALL(op, pre, post, ...) \ 585ac5672f8SJeremy Fitzhardinge ____PVOP_VCALL(op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \ 586ac5672f8SJeremy Fitzhardinge VEXTRA_CLOBBERS, \ 587ac5672f8SJeremy Fitzhardinge pre, post, ##__VA_ARGS__) 588ac5672f8SJeremy Fitzhardinge 58971999d98SJeremy Fitzhardinge #define __PVOP_VCALLEESAVE(op, pre, post, ...) \ 59071999d98SJeremy Fitzhardinge ____PVOP_VCALL(op.func, CLBR_RET_REG, \ 591ac5672f8SJeremy Fitzhardinge PVOP_VCALLEE_CLOBBERS, , \ 592ac5672f8SJeremy Fitzhardinge pre, post, ##__VA_ARGS__) 593ac5672f8SJeremy Fitzhardinge 594ac5672f8SJeremy Fitzhardinge 595ac5672f8SJeremy Fitzhardinge 596ac5672f8SJeremy Fitzhardinge #define PVOP_CALL0(rettype, op) \ 597ac5672f8SJeremy Fitzhardinge __PVOP_CALL(rettype, op, "", "") 598ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL0(op) \ 599ac5672f8SJeremy Fitzhardinge __PVOP_VCALL(op, "", "") 600ac5672f8SJeremy Fitzhardinge 601ac5672f8SJeremy Fitzhardinge #define PVOP_CALLEE0(rettype, op) \ 602ac5672f8SJeremy Fitzhardinge __PVOP_CALLEESAVE(rettype, op, "", "") 603ac5672f8SJeremy Fitzhardinge #define PVOP_VCALLEE0(op) \ 604ac5672f8SJeremy Fitzhardinge __PVOP_VCALLEESAVE(op, "", "") 605ac5672f8SJeremy Fitzhardinge 606ac5672f8SJeremy Fitzhardinge 607ac5672f8SJeremy Fitzhardinge #define PVOP_CALL1(rettype, op, arg1) \ 608ac5672f8SJeremy Fitzhardinge __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1)) 609ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL1(op, arg1) \ 610ac5672f8SJeremy Fitzhardinge __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1)) 611ac5672f8SJeremy Fitzhardinge 612ac5672f8SJeremy Fitzhardinge #define PVOP_CALLEE1(rettype, op, arg1) \ 613ac5672f8SJeremy Fitzhardinge __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1)) 614ac5672f8SJeremy Fitzhardinge #define PVOP_VCALLEE1(op, arg1) \ 615ac5672f8SJeremy Fitzhardinge __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1)) 616ac5672f8SJeremy Fitzhardinge 617ac5672f8SJeremy Fitzhardinge 618ac5672f8SJeremy Fitzhardinge #define PVOP_CALL2(rettype, op, arg1, arg2) \ 619ac5672f8SJeremy Fitzhardinge __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \ 620ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG2(arg2)) 621ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL2(op, arg1, arg2) \ 622ac5672f8SJeremy Fitzhardinge __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \ 623ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG2(arg2)) 624ac5672f8SJeremy Fitzhardinge 625ac5672f8SJeremy Fitzhardinge #define PVOP_CALLEE2(rettype, op, arg1, arg2) \ 626ac5672f8SJeremy Fitzhardinge __PVOP_CALLEESAVE(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \ 627ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG2(arg2)) 628ac5672f8SJeremy Fitzhardinge #define PVOP_VCALLEE2(op, arg1, arg2) \ 629ac5672f8SJeremy Fitzhardinge __PVOP_VCALLEESAVE(op, "", "", PVOP_CALL_ARG1(arg1), \ 630ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG2(arg2)) 631ac5672f8SJeremy Fitzhardinge 632ac5672f8SJeremy Fitzhardinge 633ac5672f8SJeremy Fitzhardinge #define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \ 634ac5672f8SJeremy Fitzhardinge __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1), \ 635ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 636ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL3(op, arg1, arg2, arg3) \ 637ac5672f8SJeremy Fitzhardinge __PVOP_VCALL(op, "", "", PVOP_CALL_ARG1(arg1), \ 638ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) 639ac5672f8SJeremy Fitzhardinge 640ac5672f8SJeremy Fitzhardinge /* This is the only difference in x86_64. We can make it much simpler */ 641ac5672f8SJeremy Fitzhardinge #ifdef CONFIG_X86_32 642ac5672f8SJeremy Fitzhardinge #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ 643ac5672f8SJeremy Fitzhardinge __PVOP_CALL(rettype, op, \ 644ac5672f8SJeremy Fitzhardinge "push %[_arg4];", "lea 4(%%esp),%%esp;", \ 645ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 646ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG3(arg3), [_arg4] "mr" ((u32)(arg4))) 647ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ 648ac5672f8SJeremy Fitzhardinge __PVOP_VCALL(op, \ 649ac5672f8SJeremy Fitzhardinge "push %[_arg4];", "lea 4(%%esp),%%esp;", \ 650ac5672f8SJeremy Fitzhardinge "0" ((u32)(arg1)), "1" ((u32)(arg2)), \ 651ac5672f8SJeremy Fitzhardinge "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4))) 652ac5672f8SJeremy Fitzhardinge #else 653ac5672f8SJeremy Fitzhardinge #define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ 654ac5672f8SJeremy Fitzhardinge __PVOP_CALL(rettype, op, "", "", \ 655ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 656ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 657ac5672f8SJeremy Fitzhardinge #define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ 658ac5672f8SJeremy Fitzhardinge __PVOP_VCALL(op, "", "", \ 659ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ 660ac5672f8SJeremy Fitzhardinge PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) 661ac5672f8SJeremy Fitzhardinge #endif 662ac5672f8SJeremy Fitzhardinge 663ac5672f8SJeremy Fitzhardinge /* Lazy mode for batching updates / context switch */ 664ac5672f8SJeremy Fitzhardinge enum paravirt_lazy_mode { 665ac5672f8SJeremy Fitzhardinge PARAVIRT_LAZY_NONE, 666ac5672f8SJeremy Fitzhardinge PARAVIRT_LAZY_MMU, 667ac5672f8SJeremy Fitzhardinge PARAVIRT_LAZY_CPU, 668ac5672f8SJeremy Fitzhardinge }; 669ac5672f8SJeremy Fitzhardinge 670ac5672f8SJeremy Fitzhardinge enum paravirt_lazy_mode paravirt_get_lazy_mode(void); 671ac5672f8SJeremy Fitzhardinge void paravirt_start_context_switch(struct task_struct *prev); 672ac5672f8SJeremy Fitzhardinge void paravirt_end_context_switch(struct task_struct *next); 673ac5672f8SJeremy Fitzhardinge 674ac5672f8SJeremy Fitzhardinge void paravirt_enter_lazy_mmu(void); 675ac5672f8SJeremy Fitzhardinge void paravirt_leave_lazy_mmu(void); 676ac5672f8SJeremy Fitzhardinge 677ac5672f8SJeremy Fitzhardinge void _paravirt_nop(void); 678ac5672f8SJeremy Fitzhardinge u32 _paravirt_ident_32(u32); 679ac5672f8SJeremy Fitzhardinge u64 _paravirt_ident_64(u64); 680ac5672f8SJeremy Fitzhardinge 681ac5672f8SJeremy Fitzhardinge #define paravirt_nop ((void *)_paravirt_nop) 682ac5672f8SJeremy Fitzhardinge 683ac5672f8SJeremy Fitzhardinge /* These all sit in the .parainstructions section to tell us what to patch. */ 684ac5672f8SJeremy Fitzhardinge struct paravirt_patch_site { 685ac5672f8SJeremy Fitzhardinge u8 *instr; /* original instructions */ 686ac5672f8SJeremy Fitzhardinge u8 instrtype; /* type of this instruction */ 687ac5672f8SJeremy Fitzhardinge u8 len; /* length of original instruction */ 688ac5672f8SJeremy Fitzhardinge u16 clobbers; /* what registers you may clobber */ 689ac5672f8SJeremy Fitzhardinge }; 690ac5672f8SJeremy Fitzhardinge 691ac5672f8SJeremy Fitzhardinge extern struct paravirt_patch_site __parainstructions[], 692ac5672f8SJeremy Fitzhardinge __parainstructions_end[]; 693ac5672f8SJeremy Fitzhardinge 694ac5672f8SJeremy Fitzhardinge #endif /* __ASSEMBLY__ */ 695ac5672f8SJeremy Fitzhardinge 696ac5672f8SJeremy Fitzhardinge #endif /* _ASM_X86_PARAVIRT_TYPES_H */ 697