diff options
Diffstat (limited to 'arch/x86/include/asm/paravirt_types.h')
| -rw-r--r-- | arch/x86/include/asm/paravirt_types.h | 138 |
1 files changed, 65 insertions, 73 deletions
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 4b75acc23b30..fba54ca23b2a 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -66,12 +66,14 @@ struct paravirt_callee_save { /* general info */ struct pv_info { +#ifdef CONFIG_PARAVIRT_XXL unsigned int kernel_rpl; int shared_kernel_pmd; #ifdef CONFIG_X86_64 u16 extra_user_64bit_cs; /* __USER_CS if none */ #endif +#endif const char *name; }; @@ -85,17 +87,18 @@ struct pv_init_ops { * the number of bytes of code generated, as we nop pad the * rest in generic code. */ - unsigned (*patch)(u8 type, u16 clobber, void *insnbuf, + unsigned (*patch)(u8 type, void *insnbuf, unsigned long addr, unsigned len); } __no_randomize_layout; - +#ifdef CONFIG_PARAVIRT_XXL struct pv_lazy_ops { /* Set deferred update mode, used for batching operations. */ void (*enter)(void); void (*leave)(void); void (*flush)(void); } __no_randomize_layout; +#endif struct pv_time_ops { unsigned long long (*sched_clock)(void); @@ -104,6 +107,9 @@ struct pv_time_ops { struct pv_cpu_ops { /* hooks for various privileged instructions */ + void (*io_delay)(void); + +#ifdef CONFIG_PARAVIRT_XXL unsigned long (*get_debugreg)(int regno); void (*set_debugreg)(int regno, unsigned long value); @@ -141,7 +147,6 @@ struct pv_cpu_ops { void (*set_iopl_mask)(unsigned mask); void (*wbinvd)(void); - void (*io_delay)(void); /* cpuid emulation, mostly so that caps bits can be disabled */ void (*cpuid)(unsigned int *eax, unsigned int *ebx, @@ -176,9 +181,11 @@ struct pv_cpu_ops { void (*start_context_switch)(struct task_struct *prev); void (*end_context_switch)(struct task_struct *next); +#endif } __no_randomize_layout; struct pv_irq_ops { +#ifdef CONFIG_PARAVIRT_XXL /* * Get/set interrupt state. save_fl and restore_fl are only * expected to use X86_EFLAGS_IF; all other bits @@ -195,35 +202,34 @@ struct pv_irq_ops { void (*safe_halt)(void); void (*halt)(void); - +#endif } __no_randomize_layout; struct pv_mmu_ops { + /* TLB operations */ + void (*flush_tlb_user)(void); + void (*flush_tlb_kernel)(void); + void (*flush_tlb_one_user)(unsigned long addr); + void (*flush_tlb_others)(const struct cpumask *cpus, + const struct flush_tlb_info *info); + + void (*tlb_remove_table)(struct mmu_gather *tlb, void *table); + + /* Hook for intercepting the destruction of an mm_struct. */ + void (*exit_mmap)(struct mm_struct *mm); + +#ifdef CONFIG_PARAVIRT_XXL unsigned long (*read_cr2)(void); void (*write_cr2)(unsigned long); unsigned long (*read_cr3)(void); void (*write_cr3)(unsigned long); - /* - * Hooks for intercepting the creation/use/destruction of an - * mm_struct. - */ + /* Hooks for intercepting the creation/use of an mm_struct. */ void (*activate_mm)(struct mm_struct *prev, struct mm_struct *next); void (*dup_mmap)(struct mm_struct *oldmm, struct mm_struct *mm); - void (*exit_mmap)(struct mm_struct *mm); - - - /* TLB operations */ - void (*flush_tlb_user)(void); - void (*flush_tlb_kernel)(void); - void (*flush_tlb_one_user)(unsigned long addr); - void (*flush_tlb_others)(const struct cpumask *cpus, - const struct flush_tlb_info *info); - - void (*tlb_remove_table)(struct mmu_gather *tlb, void *table); /* Hooks for allocating and freeing a pagetable top-level */ int (*pgd_alloc)(struct mm_struct *mm); @@ -298,6 +304,7 @@ struct pv_mmu_ops { an mfn. We can tell which is which from the index. */ void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx, phys_addr_t phys, pgprot_t flags); +#endif } __no_randomize_layout; struct arch_spinlock; @@ -321,48 +328,31 @@ struct pv_lock_ops { * number for each function using the offset which we use to indicate * what to patch. */ struct paravirt_patch_template { - struct pv_init_ops pv_init_ops; - struct pv_time_ops pv_time_ops; - struct pv_cpu_ops pv_cpu_ops; - struct pv_irq_ops pv_irq_ops; - struct pv_mmu_ops pv_mmu_ops; - struct pv_lock_ops pv_lock_ops; + struct pv_init_ops init; + struct pv_time_ops time; + struct pv_cpu_ops cpu; + struct pv_irq_ops irq; + struct pv_mmu_ops mmu; + struct pv_lock_ops lock; } __no_randomize_layout; extern struct pv_info pv_info; -extern struct pv_init_ops pv_init_ops; -extern struct pv_time_ops pv_time_ops; -extern struct pv_cpu_ops pv_cpu_ops; -extern struct pv_irq_ops pv_irq_ops; -extern struct pv_mmu_ops pv_mmu_ops; -extern struct pv_lock_ops pv_lock_ops; +extern struct paravirt_patch_template pv_ops; #define PARAVIRT_PATCH(x) \ (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) #define paravirt_type(op) \ [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \ - [paravirt_opptr] "i" (&(op)) + [paravirt_opptr] "i" (&(pv_ops.op)) #define paravirt_clobber(clobber) \ [paravirt_clobber] "i" (clobber) -/* - * Generate some code, and mark it as patchable by the - * apply_paravirt() alternate instruction patcher. - */ -#define _paravirt_alt(insn_string, type, clobber) \ - "771:\n\t" insn_string "\n" "772:\n" \ - ".pushsection .parainstructions,\"a\"\n" \ - _ASM_ALIGN "\n" \ - _ASM_PTR " 771b\n" \ - " .byte " type "\n" \ - " .byte 772b-771b\n" \ - " .short " clobber "\n" \ - ".popsection\n" - /* Generate patchable code, with the default asm parameters. */ -#define paravirt_alt(insn_string) \ - _paravirt_alt(insn_string, "%c[paravirt_typenum]", "%c[paravirt_clobber]") +#define paravirt_call \ + "PARAVIRT_CALL type=\"%c[paravirt_typenum]\"" \ + " clobber=\"%c[paravirt_clobber]\"" \ + " pv_opptr=\"%c[paravirt_opptr]\";" /* Simple instruction patching code. */ #define NATIVE_LABEL(a,x,b) "\n\t.globl " a #x "_" #b "\n" a #x "_" #b ":\n\t" @@ -373,34 +363,17 @@ extern struct pv_lock_ops pv_lock_ops; unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len); unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len); -unsigned paravirt_patch_call(void *insnbuf, - const void *target, u16 tgt_clobbers, - unsigned long addr, u16 site_clobbers, - unsigned len); -unsigned paravirt_patch_jmp(void *insnbuf, const void *target, - unsigned long addr, unsigned len); -unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf, +unsigned paravirt_patch_default(u8 type, void *insnbuf, unsigned long addr, unsigned len); unsigned paravirt_patch_insns(void *insnbuf, unsigned len, const char *start, const char *end); -unsigned native_patch(u8 type, u16 clobbers, void *ibuf, - unsigned long addr, unsigned len); +unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len); int paravirt_disable_iospace(void); /* - * This generates an indirect call based on the operation type number. - * The type number, computed in PARAVIRT_PATCH, is derived from the - * offset into the paravirt_patch_template structure, and can therefore be - * freely converted back into a structure offset. - */ -#define PARAVIRT_CALL \ - ANNOTATE_RETPOLINE_SAFE \ - "call *%c[paravirt_opptr];" - -/* * These macros are intended to wrap calls through one of the paravirt * ops structs, so that they can be later identified and patched at * runtime. @@ -510,9 +483,9 @@ int paravirt_disable_iospace(void); #endif /* CONFIG_X86_32 */ #ifdef CONFIG_PARAVIRT_DEBUG -#define PVOP_TEST_NULL(op) BUG_ON(op == NULL) +#define PVOP_TEST_NULL(op) BUG_ON(pv_ops.op == NULL) #else -#define PVOP_TEST_NULL(op) ((void)op) +#define PVOP_TEST_NULL(op) ((void)pv_ops.op) #endif #define PVOP_RETMASK(rettype) \ @@ -537,7 +510,7 @@ int paravirt_disable_iospace(void); /* since this condition will never hold */ \ if (sizeof(rettype) > sizeof(unsigned long)) { \ asm volatile(pre \ - paravirt_alt(PARAVIRT_CALL) \ + paravirt_call \ post \ : call_clbr, ASM_CALL_CONSTRAINT \ : paravirt_type(op), \ @@ -547,7 +520,7 @@ int paravirt_disable_iospace(void); __ret = (rettype)((((u64)__edx) << 32) | __eax); \ } else { \ asm volatile(pre \ - paravirt_alt(PARAVIRT_CALL) \ + paravirt_call \ post \ : call_clbr, ASM_CALL_CONSTRAINT \ : paravirt_type(op), \ @@ -574,7 +547,7 @@ int paravirt_disable_iospace(void); PVOP_VCALL_ARGS; \ PVOP_TEST_NULL(op); \ asm volatile(pre \ - paravirt_alt(PARAVIRT_CALL) \ + paravirt_call \ post \ : call_clbr, ASM_CALL_CONSTRAINT \ : paravirt_type(op), \ @@ -688,12 +661,31 @@ struct paravirt_patch_site { u8 *instr; /* original instructions */ u8 instrtype; /* type of this instruction */ u8 len; /* length of original instruction */ - u16 clobbers; /* what registers you may clobber */ }; extern struct paravirt_patch_site __parainstructions[], __parainstructions_end[]; +#else /* __ASSEMBLY__ */ + +/* + * This generates an indirect call based on the operation type number. + * The type number, computed in PARAVIRT_PATCH, is derived from the + * offset into the paravirt_patch_template structure, and can therefore be + * freely converted back into a structure offset. + */ +.macro PARAVIRT_CALL type:req clobber:req pv_opptr:req +771: ANNOTATE_RETPOLINE_SAFE + call *\pv_opptr +772: .pushsection .parainstructions,"a" + _ASM_ALIGN + _ASM_PTR 771b + .byte \type + .byte 772b-771b + .short \clobber + .popsection +.endm + #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_PARAVIRT_TYPES_H */ |