diff options
Diffstat (limited to 'include/asm-i386/paravirt.h')
| -rw-r--r-- | include/asm-i386/paravirt.h | 957 |
1 files changed, 735 insertions, 222 deletions
diff --git a/include/asm-i386/paravirt.h b/include/asm-i386/paravirt.h index e63f1e44..e2e7f98 100644 --- a/include/asm-i386/paravirt.h +++ b/include/asm-i386/paravirt.h @@ -2,20 +2,9 @@ #define __ASM_PARAVIRT_H /* Various instructions on x86 need to be replaced for * para-virtualization: those hooks are defined here. */ -#include <linux/linkage.h> -#include <linux/stringify.h> -#include <asm/page.h> #ifdef CONFIG_PARAVIRT -/* These are the most performance critical ops, so we want to be able to patch - * callers */ -#define PARAVIRT_IRQ_DISABLE 0 -#define PARAVIRT_IRQ_ENABLE 1 -#define PARAVIRT_RESTORE_FLAGS 2 -#define PARAVIRT_SAVE_FLAGS 3 -#define PARAVIRT_SAVE_FLAGS_IRQ_DISABLE 4 -#define PARAVIRT_INTERRUPT_RETURN 5 -#define PARAVIRT_STI_SYSEXIT 6 +#include <asm/page.h> /* Bitmask of what can be clobbered: usually at least eax. */ #define CLBR_NONE 0x0 @@ -25,13 +14,29 @@ #define CLBR_ANY 0x7 #ifndef __ASSEMBLY__ +#include <linux/types.h> +#include <linux/cpumask.h> +#include <asm/kmap_types.h> + +struct page; struct thread_struct; struct Xgt_desc_struct; struct tss_struct; struct mm_struct; +struct desc_struct; + +/* Lazy mode for batching updates / context switch */ +enum paravirt_lazy_mode { + PARAVIRT_LAZY_NONE = 0, + PARAVIRT_LAZY_MMU = 1, + PARAVIRT_LAZY_CPU = 2, + PARAVIRT_LAZY_FLUSH = 3, +}; + struct paravirt_ops { unsigned int kernel_rpl; + int shared_kernel_pmd; int paravirt_enabled; const char *name; @@ -44,24 +49,33 @@ struct paravirt_ops */ unsigned (*patch)(u8 type, u16 clobber, void *firstinsn, unsigned len); + /* Basic arch-specific setup */ void (*arch_setup)(void); char *(*memory_setup)(void); void (*init_IRQ)(void); + void (*time_init)(void); + /* + * Called before/after init_mm pagetable setup. setup_start + * may reset %cr3, and may pre-install parts of the pagetable; + * pagetable setup is expected to preserve any existing + * mapping. + */ + void (*pagetable_setup_start)(pgd_t *pgd_base); + void (*pagetable_setup_done)(pgd_t *pgd_base); + + /* Print a banner to identify the environment */ void (*banner)(void); + /* Set and set time of day */ unsigned long (*get_wallclock)(void); int (*set_wallclock)(unsigned long); - void (*time_init)(void); - - /* All the function pointers here are declared as "fastcall" - so that we get a specific register-based calling - convention. This makes it easier to implement inline - assembler replacements. */ + /* cpuid emulation, mostly so that caps bits can be disabled */ void (*cpuid)(unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx); + /* hooks for various privileged instructions */ unsigned long (*get_debugreg)(int regno); void (*set_debugreg)(int regno, unsigned long value); @@ -80,15 +94,23 @@ struct paravirt_ops unsigned long (*read_cr4)(void); void (*write_cr4)(unsigned long); + /* + * Get/set interrupt state. save_fl and restore_fl are only + * expected to use X86_EFLAGS_IF; all other bits + * returned from save_fl are undefined, and may be ignored by + * restore_fl. + */ unsigned long (*save_fl)(void); void (*restore_fl)(unsigned long); void (*irq_disable)(void); void (*irq_enable)(void); void (*safe_halt)(void); void (*halt)(void); + void (*wbinvd)(void); - /* err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */ + /* MSR, PMC and TSR operations. + err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */ u64 (*read_msr)(unsigned int msr, int *err); int (*write_msr)(unsigned int msr, u64 val); @@ -97,6 +119,7 @@ struct paravirt_ops u64 (*get_scheduled_cycles)(void); unsigned long (*get_cpu_khz)(void); + /* Segment descriptor handling */ void (*load_tr_desc)(void); void (*load_gdt)(const struct Xgt_desc_struct *); void (*load_idt)(const struct Xgt_desc_struct *); @@ -105,59 +128,98 @@ struct paravirt_ops void (*set_ldt)(const void *desc, unsigned entries); unsigned long (*store_tr)(void); void (*load_tls)(struct thread_struct *t, unsigned int cpu); - void (*write_ldt_entry)(void *dt, int entrynum, - u32 low, u32 high); - void (*write_gdt_entry)(void *dt, int entrynum, - u32 low, u32 high); - void (*write_idt_entry)(void *dt, int entrynum, - u32 low, u32 high); - void (*load_esp0)(struct tss_struct *tss, - struct thread_struct *thread); + void (*write_ldt_entry)(struct desc_struct *, + int entrynum, u32 low, u32 high); + void (*write_gdt_entry)(struct desc_struct *, + int entrynum, u32 low, u32 high); + void (*write_idt_entry)(struct desc_struct *, + int entrynum, u32 low, u32 high); + void (*load_esp0)(struct tss_struct *tss, struct thread_struct *t); void (*set_iopl_mask)(unsigned mask); - void (*io_delay)(void); + /* + * Hooks for intercepting the creation/use/destruction 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); + #ifdef CONFIG_X86_LOCAL_APIC + /* + * Direct APIC operations, principally for VMI. Ideally + * these shouldn't be in this interface. + */ void (*apic_write)(unsigned long reg, unsigned long v); void (*apic_write_atomic)(unsigned long reg, unsigned long v); unsigned long (*apic_read)(unsigned long reg); void (*setup_boot_clock)(void); void (*setup_secondary_clock)(void); + + void (*startup_ipi_hook)(int phys_apicid, + unsigned long start_eip, + unsigned long start_esp); #endif + /* TLB operations */ void (*flush_tlb_user)(void); void (*flush_tlb_kernel)(void); - void (*flush_tlb_single)(u32 addr); - - void (*map_pt_hook)(int type, pte_t *va, u32 pfn); + void (*flush_tlb_single)(unsigned long addr); + void (*flush_tlb_others)(const cpumask_t *cpus, struct mm_struct *mm, + unsigned long va); + /* Hooks for allocating/releasing pagetable pages */ void (*alloc_pt)(u32 pfn); void (*alloc_pd)(u32 pfn); void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count); void (*release_pt)(u32 pfn); void (*release_pd)(u32 pfn); + /* Pagetable manipulation functions */ void (*set_pte)(pte_t *ptep, pte_t pteval); - void (*set_pte_at)(struct mm_struct *mm, u32 addr, pte_t *ptep, pte_t pteval); + void (*set_pte_at)(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pteval); void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval); - void (*pte_update)(struct mm_struct *mm, u32 addr, pte_t *ptep); - void (*pte_update_defer)(struct mm_struct *mm, u32 addr, pte_t *ptep); + void (*pte_update)(struct mm_struct *mm, unsigned long addr, pte_t *ptep); + void (*pte_update_defer)(struct mm_struct *mm, + unsigned long addr, pte_t *ptep); + +#ifdef CONFIG_HIGHPTE + void *(*kmap_atomic_pte)(struct page *page, enum km_type type); +#endif + #ifdef CONFIG_X86_PAE void (*set_pte_atomic)(pte_t *ptep, pte_t pteval); - void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte); + void (*set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte); void (*set_pud)(pud_t *pudp, pud_t pudval); - void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep); + void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep); void (*pmd_clear)(pmd_t *pmdp); + + unsigned long long (*pte_val)(pte_t); + unsigned long long (*pmd_val)(pmd_t); + unsigned long long (*pgd_val)(pgd_t); + + pte_t (*make_pte)(unsigned long long pte); + pmd_t (*make_pmd)(unsigned long long pmd); + pgd_t (*make_pgd)(unsigned long long pgd); +#else + unsigned long (*pte_val)(pte_t); + unsigned long (*pgd_val)(pgd_t); + + pte_t (*make_pte)(unsigned long pte); + pgd_t (*make_pgd)(unsigned long pgd); #endif - void (*set_lazy_mode)(int mode); + /* Set deferred update mode, used for batching operations. */ + void (*set_lazy_mode)(enum paravirt_lazy_mode mode); /* These two are jmp to, not actually called. */ void (*irq_enable_sysexit)(void); void (*iret)(void); - - void (*startup_ipi_hook)(int phys_apicid, unsigned long start_eip, unsigned long start_esp); }; /* Mark a paravirt probe function. */ @@ -167,23 +229,202 @@ struct paravirt_ops extern struct paravirt_ops paravirt_ops; -#define paravirt_enabled() (paravirt_ops.paravirt_enabled) +#define PARAVIRT_PATCH(x) \ + (offsetof(struct paravirt_ops, x) / sizeof(void *)) + +#define paravirt_type(type) \ + [paravirt_typenum] "i" (PARAVIRT_PATCH(type)) +#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" \ + " .long 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]") + +unsigned paravirt_patch_nop(void); +unsigned paravirt_patch_ignore(unsigned len); +unsigned paravirt_patch_call(void *target, u16 tgt_clobbers, + void *site, u16 site_clobbers, + unsigned len); +unsigned paravirt_patch_jmp(void *target, void *site, unsigned len); +unsigned paravirt_patch_default(u8 type, u16 clobbers, void *site, unsigned len); + +unsigned paravirt_patch_insns(void *site, unsigned len, + const char *start, const char *end); + + +/* + * 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_ops structure, and can therefore be freely + * converted back into a structure offset. + */ +#define PARAVIRT_CALL "call *(paravirt_ops+%c[paravirt_typenum]*4);" + +/* + * These macros are intended to wrap calls into a paravirt_ops + * operation, so that they can be later identified and patched at + * runtime. + * + * Normally, a call to a pv_op function is a simple indirect call: + * (paravirt_ops.operations)(args...). + * + * Unfortunately, this is a relatively slow operation for modern CPUs, + * because it cannot necessarily determine what the destination + * address is. In this case, the address is a runtime constant, so at + * the very least we can patch the call to e a simple direct call, or + * ideally, patch an inline implementation into the callsite. (Direct + * calls are essentially free, because the call and return addresses + * are completely predictable.) + * + * These macros rely on the standard gcc "regparm(3)" calling + * convention, in which the first three arguments are placed in %eax, + * %edx, %ecx (in that order), and the remaining arguments are placed + * on the stack. All caller-save registers (eax,edx,ecx) are expected + * to be modified (either clobbered or used for return values). + * + * The call instruction itself is marked by placing its start address + * and size into the .parainstructions section, so that + * apply_paravirt() in arch/i386/kernel/alternative.c can do the + * appropriate patching under the control of the backend paravirt_ops + * implementation. + * + * Unfortunately there's no way to get gcc to generate the args setup + * for the call, and then allow the call itself to be generated by an + * inline asm. Because of this, we must do the complete arg setup and + * return value handling from within these macros. This is fairly + * cumbersome. + * + * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments. + * It could be extended to more arguments, but there would be little + * to be gained from that. For each number of arguments, there are + * the two VCALL and CALL variants for void and non-void functions. + * + * When there is a return value, the invoker of the macro must specify + * the return type. The macro then uses sizeof() on that type to + * determine whether its a 32 or 64 bit value, and places the return + * in the right register(s) (just %eax for 32-bit, and %edx:%eax for + * 64-bit). + * + * 64-bit arguments are passed as a pair of adjacent 32-bit arguments + * in low,high order. + * + * Small structures are passed and returned in registers. The macro + * calling convention can't directly deal with this, so the wrapper + * functions must do this. + * + * These PVOP_* macros are only defined within this header. This + * means that all uses must be wrapped in inline functions. This also + * makes sure the incoming and outgoing types are always correct. + */ +#define __PVOP_CALL(rettype, op, pre, post, ...) \ + ({ \ + rettype __ret; \ + unsigned long __eax, __edx, __ecx; \ + if (sizeof(rettype) > sizeof(unsigned long)) { \ + asm volatile(pre \ + paravirt_alt(PARAVIRT_CALL) \ + post \ + : "=a" (__eax), "=d" (__edx), \ + "=c" (__ecx) \ + : paravirt_type(op), \ + paravirt_clobber(CLBR_ANY), \ + ##__VA_ARGS__ \ + : "memory", "cc"); \ + __ret = (rettype)((((u64)__edx) << 32) | __eax); \ + } else { \ + asm volatile(pre \ + paravirt_alt(PARAVIRT_CALL) \ + post \ + : "=a" (__eax), "=d" (__edx), \ + "=c" (__ecx) \ + : paravirt_type(op), \ + paravirt_clobber(CLBR_ANY), \ + ##__VA_ARGS__ \ + : "memory", "cc"); \ + __ret = (rettype)__eax; \ + } \ + __ret; \ + }) +#define __PVOP_VCALL(op, pre, post, ...) \ + ({ \ + unsigned long __eax, __edx, __ecx; \ + asm volatile(pre \ + paravirt_alt(PARAVIRT_CALL) \ + post \ + : "=a" (__eax), "=d" (__edx), "=c" (__ecx) \ + : paravirt_type(op), \ + paravirt_clobber(CLBR_ANY), \ + ##__VA_ARGS__ \ + : "memory", "cc"); \ + }) + +#define PVOP_CALL0(rettype, op) \ + __PVOP_CALL(rettype, op, "", "") +#define PVOP_VCALL0(op) \ + __PVOP_VCALL(op, "", "") + +#define PVOP_CALL1(rettype, op, arg1) \ + __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1))) +#define PVOP_VCALL1(op, arg1) \ + __PVOP_VCALL(op, "", "", "0" ((u32)(arg1))) + +#define PVOP_CALL2(rettype, op, arg1, arg2) \ + __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)), "1" ((u32)(arg2))) +#define PVOP_VCALL2(op, arg1, arg2) \ + __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)), "1" ((u32)(arg2))) + +#define PVOP_CALL3(rettype, op, arg1, arg2, arg3) \ + __PVOP_CALL(rettype, op, "", "", "0" ((u32)(arg1)), \ + "1"((u32)(arg2)), "2"((u32)(arg3))) +#define PVOP_VCALL3(op, arg1, arg2, arg3) \ + __PVOP_VCALL(op, "", "", "0" ((u32)(arg1)), "1"((u32)(arg2)), \ + "2"((u32)(arg3))) + +#define PVOP_CALL4(rettype, op, arg1, arg2, arg3, arg4) \ + __PVOP_CALL(rettype, op, \ + "push %[_arg4];", "lea 4(%%esp),%%esp;", \ + "0" ((u32)(arg1)), "1" ((u32)(arg2)), \ + "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4))) +#define PVOP_VCALL4(op, arg1, arg2, arg3, arg4) \ + __PVOP_VCALL(op, \ + "push %[_arg4];", "lea 4(%%esp),%%esp;", \ + "0" ((u32)(arg1)), "1" ((u32)(arg2)), \ + "2" ((u32)(arg3)), [_arg4] "mr" ((u32)(arg4))) + +static inline int paravirt_enabled(void) +{ + return paravirt_ops.paravirt_enabled; +} static inline void load_esp0(struct tss_struct *tss, struct thread_struct *thread) { - paravirt_ops.load_esp0(tss, thread); + PVOP_VCALL2(load_esp0, tss, thread); } #define ARCH_SETUP paravirt_ops.arch_setup(); static inline unsigned long get_wallclock(void) { - return paravirt_ops.get_wallclock(); + return PVOP_CALL0(unsigned long, get_wallclock); } static inline int set_wallclock(unsigned long nowtime) { - return paravirt_ops.set_wallclock(nowtime); + return PVOP_CALL1(int, set_wallclock, nowtime); } static inline void (*choose_time_init(void))(void) @@ -195,113 +436,208 @@ static inline void (*choose_time_init(void))(void) static inline void __cpuid(unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx) { - paravirt_ops.cpuid(eax, ebx, ecx, edx); + PVOP_VCALL4(cpuid, eax, ebx, ecx, edx); } /* * These special macros can be used to get or set a debugging register */ -#define get_debugreg(var, reg) var = paravirt_ops.get_debugreg(reg) -#define set_debugreg(val, reg) paravirt_ops.set_debugreg(reg, val) +static inline unsigned long paravirt_get_debugreg(int reg) +{ + return PVOP_CALL1(unsigned long, get_debugreg, reg); +} +#define get_debugreg(var, reg) var = paravirt_get_debugreg(reg) +static inline void set_debugreg(unsigned long val, int reg) +{ + PVOP_VCALL2(set_debugreg, reg, val); +} + +static inline void clts(void) +{ + PVOP_VCALL0(clts); +} -#define clts() paravirt_ops.clts() +static inline unsigned long read_cr0(void) +{ + return PVOP_CALL0(unsigned long, read_cr0); +} -#define read_cr0() paravirt_ops.read_cr0() -#define write_cr0(x) paravirt_ops.write_cr0(x) +static inline void write_cr0(unsigned long x) +{ + PVOP_VCALL1(write_cr0, x); +} -#define read_cr2() paravirt_ops.read_cr2() -#define write_cr2(x) paravirt_ops.write_cr2(x) +static inline unsigned long read_cr2(void) +{ + return PVOP_CALL0(unsigned long, read_cr2); +} -#define read_cr3() paravirt_ops.read_cr3() -#define write_cr3(x) paravirt_ops.write_cr3(x) +static inline void write_cr2(unsigned long x) +{ + PVOP_VCALL1(write_cr2, x); +} -#define read_cr4() paravirt_ops.read_cr4() -#define read_cr4_safe(x) paravirt_ops.read_cr4_safe() -#define write_cr4(x) paravirt_ops.write_cr4(x) +static inline unsigned long read_cr3(void) +{ + return PVOP_CALL0(unsigned long, read_cr3); +} + +static inline void write_cr3(unsigned long x) +{ + PVOP_VCALL1(write_cr3, x); +} + +static inline unsigned long read_cr4(void) +{ + return PVOP_CALL0(unsigned long, read_cr4); +} +static inline unsigned long read_cr4_safe(void) +{ + return PVOP_CALL0(unsigned long, read_cr4_safe); +} + +static inline void write_cr4(unsigned long x) +{ + PVOP_VCALL1(write_cr4, x); +} static inline void raw_safe_halt(void) { - paravirt_ops.safe_halt(); + PVOP_VCALL0(safe_halt); } static inline void halt(void) { - paravirt_ops.safe_halt(); + PVOP_VCALL0(safe_halt); +} + +static inline void wbinvd(void) +{ + PVOP_VCALL0(wbinvd); } -#define wbinvd() paravirt_ops.wbinvd() #define get_kernel_rpl() (paravirt_ops.kernel_rpl) -#define rdmsr(msr,val1,val2) do { \ - int _err; \ - u64 _l = paravirt_ops.read_msr(msr,&_err); \ - val1 = (u32)_l; \ - val2 = _l >> 32; \ +static inline u64 paravirt_read_msr(unsigned msr, int *err) +{ + return PVOP_CALL2(u64, read_msr, msr, err); +} +static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high) +{ + return PVOP_CALL3(int, write_msr, msr, low, high); +} + +/* These should all do BUG_ON(_err), but our headers are too tangled. */ +#define rdmsr(msr,val1,val2) do { \ + int _err; \ + u64 _l = paravirt_read_msr(msr, &_err); \ + val1 = (u32)_l; \ + val2 = _l >> 32; \ } while(0) -#define wrmsr(msr,val1,val2) do { \ - u64 _l = ((u64)(val2) << 32) | (val1); \ - paravirt_ops.write_msr((msr), _l); \ +#define wrmsr(msr,val1,val2) do { \ + paravirt_write_msr(msr, val1, val2); \ } while(0) -#define rdmsrl(msr,val) do { \ - int _err; \ - val = paravirt_ops.read_msr((msr),&_err); \ +#define rdmsrl(msr,val) do { \ + int _err; \ + val = paravirt_read_msr(msr, &_err); \ } while(0) -#define wrmsrl(msr,val) (paravirt_ops.write_msr((msr),(val))) -#define wrmsr_safe(msr,a,b) ({ \ - u64 _l = ((u64)(b) << 32) | (a); \ - paravirt_ops.write_msr((msr),_l); \ -}) +#define wrmsrl(msr,val) ((void)paravirt_write_msr(msr, val, 0)) +#define wrmsr_safe(msr,a,b) paravirt_write_msr(msr, a, b) /* rdmsr with exception handling */ -#define rdmsr_safe(msr,a,b) ({ \ - int _err; \ - u64 _l = paravirt_ops.read_msr(msr,&_err); \ - (*a) = (u32)_l; \ - (*b) = _l >> 32; \ +#define rdmsr_safe(msr,a,b) ({ \ + int _err; \ + u64 _l = paravirt_read_msr(msr, &_err); \ + (*a) = (u32)_l; \ + (*b) = _l >> 32; \ _err; }) -#define rdtsc(low,high) do { \ - u64 _l = paravirt_ops.read_tsc(); \ - low = (u32)_l; \ - high = _l >> 32; \ + +static inline u64 paravirt_read_tsc(void) +{ + return PVOP_CALL0(u64, read_tsc); +} +#define rdtsc(low,high) do { \ + u64 _l = paravirt_read_tsc(); \ + low = (u32)_l; \ + high = _l >> 32; \ } while(0) -#define rdtscl(low) do { \ - u64 _l = paravirt_ops.read_tsc(); \ - low = (int)_l; \ +#define rdtscl(low) do { \ + u64 _l = paravirt_read_tsc(); \ + low = (int)_l; \ } while(0) -#define rdtscll(val) (val = paravirt_ops.read_tsc()) +#define rdtscll(val) (val = paravirt_read_tsc()) #define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles()) #define calculate_cpu_khz() (paravirt_ops.get_cpu_khz()) #define write_tsc(val1,val2) wrmsr(0x10, val1, val2) -#define rdpmc(counter,low,high) do { \ - u64 _l = paravirt_ops.read_pmc(); \ - low = (u32)_l; \ - high = _l >> 32; \ +static inline unsigned long long paravirt_read_pmc(int counter) +{ + return PVOP_CALL1(u64, read_pmc, counter); +} + +#define rdpmc(counter,low,high) do { \ + u64 _l = paravirt_read_pmc(counter); \ + low = (u32)_l; \ + high = _l >> 32; \ } while(0) -#define load_TR_desc() (paravirt_ops.load_tr_desc()) -#define load_gdt(dtr) (paravirt_ops.load_gdt(dtr)) -#define load_idt(dtr) (paravirt_ops.load_idt(dtr)) -#define set_ldt(addr, entries) (paravirt_ops.set_ldt((addr), (entries))) -#define store_gdt(dtr) (paravirt_ops.store_gdt(dtr)) -#define store_idt(dtr) (paravirt_ops.store_idt(dtr)) -#define store_tr(tr) ((tr) = paravirt_ops.store_tr()) -#define load_TLS(t,cpu) (paravirt_ops.load_tls((t),(cpu))) -#define write_ldt_entry(dt, entry, low, high) \ - (paravirt_ops.write_ldt_entry((dt), (entry), (low), (high))) -#define write_gdt_entry(dt, entry, low, high) \ - (paravirt_ops.write_gdt_entry((dt), (entry), (low), (high))) -#define write_idt_entry(dt, entry, low, high) \ - (paravirt_ops.write_idt_entry((dt), (entry), (low), (high))) -#define set_iopl_mask(mask) (paravirt_ops.set_iopl_mask(mask)) +static inline void load_TR_desc(void) +{ + PVOP_VCALL0(load_tr_desc); +} +static inline void load_gdt(const struct Xgt_desc_struct *dtr) +{ + PVOP_VCALL1(load_gdt, dtr); +} +static inline void load_idt(const struct Xgt_desc_struct *dtr) +{ + PVOP_VCALL1(load_idt, dtr); +} +static inline void set_ldt(const void *addr, unsigned entries) +{ + PVOP_VCALL2(set_ldt, addr, entries); +} +static inline void store_gdt(struct Xgt_desc_struct *dtr) +{ + PVOP_VCALL1(store_gdt, dtr); +} +static inline void store_idt(struct Xgt_desc_struct *dtr) +{ + PVOP_VCALL1(store_idt, dtr); +} +static inline unsigned long paravirt_store_tr(void) +{ + return PVOP_CALL0(unsigned long, store_tr); +} +#define store_tr(tr) ((tr) = paravirt_store_tr()) +static inline void load_TLS(struct thread_struct *t, unsigned cpu) +{ + PVOP_VCALL2(load_tls, t, cpu); +} +static inline void write_ldt_entry(void *dt, int entry, u32 low, u32 high) +{ + PVOP_VCALL4(write_ldt_entry, dt, entry, low, high); +} +static inline void write_gdt_entry(void *dt, int entry, u32 low, u32 high) +{ + PVOP_VCALL4(write_gdt_entry, dt, entry, low, high); +} +static inline void write_idt_entry(void *dt, int entry, u32 low, u32 high) +{ + PVOP_VCALL4(write_idt_entry, dt, entry, low, high); +} +static inline void set_iopl_mask(unsigned mask) +{ + PVOP_VCALL1(set_iopl_mask, mask); +} /* The paravirtualized I/O functions */ static inline void slow_down_io(void) { @@ -319,215 +655,390 @@ static inline void slow_down_io(void) { */ static inline void apic_write(unsigned long reg, unsigned long v) { - paravirt_ops.apic_write(reg,v); + PVOP_VCALL2(apic_write, reg, v); } static inline void apic_write_atomic(unsigned long reg, unsigned long v) { - paravirt_ops.apic_write_atomic(reg,v); + PVOP_VCALL2(apic_write_atomic, reg, v); } static inline unsigned long apic_read(unsigned long reg) { - return paravirt_ops.apic_read(reg); + return PVOP_CALL1(unsigned long, apic_read, reg); } static inline void setup_boot_clock(void) { - paravirt_ops.setup_boot_clock(); + PVOP_VCALL0(setup_boot_clock); } static inline void setup_secondary_clock(void) { - paravirt_ops.setup_secondary_clock(); + PVOP_VCALL0(setup_secondary_clock); } #endif +static inline void paravirt_pagetable_setup_start(pgd_t *base) +{ + if (paravirt_ops.pagetable_setup_start) + (*paravirt_ops.pagetable_setup_start)(base); +} + +static inline void paravirt_pagetable_setup_done(pgd_t *base) +{ + if (paravirt_ops.pagetable_setup_done) + (*paravirt_ops.pagetable_setup_done)(base); +} + #ifdef CONFIG_SMP static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip, unsigned long start_esp) { - return paravirt_ops.startup_ipi_hook(phys_apicid, start_eip, start_esp); + PVOP_VCALL3(startup_ipi_hook, phys_apicid, start_eip, start_esp); } #endif -#define __flush_tlb() paravirt_ops.flush_tlb_user() -#define __flush_tlb_global() paravirt_ops.flush_tlb_kernel() -#define __flush_tlb_single(addr) paravirt_ops.flush_tlb_single(addr) +static inline void paravirt_activate_mm(struct mm_struct *prev, + struct mm_struct *next) +{ + PVOP_VCALL2(activate_mm, prev, next); +} -#define paravirt_map_pt_hook(type, va, pfn) paravirt_ops.map_pt_hook(type, va, pfn) +static inline void arch_dup_mmap(struct mm_struct *oldmm, + struct mm_struct *mm) +{ + PVOP_VCALL2(dup_mmap, oldmm, mm); +} -#define paravirt_alloc_pt(pfn) paravirt_ops.alloc_pt(pfn) -#define paravirt_release_pt(pfn) paravirt_ops.release_pt(pfn) +static inline void arch_exit_mmap(struct mm_struct *mm) +{ + PVOP_VCALL1(exit_mmap, mm); +} -#define paravirt_alloc_pd(pfn) paravirt_ops.alloc_pd(pfn) -#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) \ - paravirt_ops.alloc_pd_clone(pfn, clonepfn, start, count) -#define paravirt_release_pd(pfn) paravirt_ops.release_pd(pfn) +static inline void __flush_tlb(void) +{ + PVOP_VCALL0(flush_tlb_user); +} +static inline void __flush_tlb_global(void) +{ + PVOP_VCALL0(flush_tlb_kernel); +} +static inline void __flush_tlb_single(unsigned long addr) +{ + PVOP_VCALL1(flush_tlb_single, addr); +} -static inline void set_pte(pte_t *ptep, pte_t pteval) +static inline void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm, + unsigned long va) { - paravirt_ops.set_pte(ptep, pteval); + PVOP_VCALL3(flush_tlb_others, &cpumask, mm, va); } -static inline void set_pte_at(struct mm_struct *mm, u32 addr, pte_t *ptep, pte_t pteval) +static inline void paravirt_alloc_pt(unsigned pfn) { - paravirt_ops.set_pte_at(mm, addr, ptep, pteval); + PVOP_VCALL1(alloc_pt, pfn); +} +static inline void paravirt_release_pt(unsigned pfn) +{ + PVOP_VCALL1(release_pt, pfn); } -static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval) +static inline void paravirt_alloc_pd(unsigned pfn) { - paravirt_ops.set_pmd(pmdp, pmdval); + PVOP_VCALL1(alloc_pd, pfn); } -static inline void pte_update(struct mm_struct *mm, u32 addr, pte_t *ptep) +static inline void paravirt_alloc_pd_clone(unsigned pfn, unsigned clonepfn, + unsigned start, unsigned count) { - paravirt_ops.pte_update(mm, addr, ptep); + PVOP_VCALL4(alloc_pd_clone, pfn, clonepfn, start, count); +} +static inline void paravirt_release_pd(unsigned pfn) +{ + PVOP_VCALL1(release_pd, pfn); } -static inline void pte_update_defer(struct mm_struct *mm, u32 addr, pte_t *ptep) +#ifdef CONFIG_HIGHPTE +static inline void *kmap_atomic_pte(struct page *page, enum km_type type) { - paravirt_ops.pte_update_defer(mm, addr, ptep); + unsigned long ret; + ret = PVOP_CALL2(unsigned long, kmap_atomic_pte, page, type); + return (void *)ret; +} +#endif + +static inline void pte_update(struct mm_struct *mm, unsigned long addr, + pte_t *ptep) +{ + PVOP_VCALL3(pte_update, mm, addr, ptep); +} + +static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr, + pte_t *ptep) +{ + PVOP_VCALL3(pte_update_defer, mm, addr, ptep); } #ifdef CONFIG_X86_PAE +static inline pte_t __pte(unsigned long long val) +{ + unsigned long long ret = PVOP_CALL2(unsigned long long, make_pte, + val, val >> 32); + return (pte_t) { ret, ret >> 32 }; +} + +static inline pmd_t __pmd(unsigned long long val) +{ + return (pmd_t) { PVOP_CALL2(unsigned long long, make_pmd, val, val >> 32) }; +} + +static inline pgd_t __pgd(unsigned long long val) +{ + return (pgd_t) { PVOP_CALL2(unsigned long long, make_pgd, val, val >> 32) }; +} + +static inline unsigned long long pte_val(pte_t x) +{ + return PVOP_CALL2(unsigned long long, pte_val, x.pte_low, x.pte_high); +} + +static inline unsigned long long pmd_val(pmd_t x) +{ + return PVOP_CALL2(unsigned long long, pmd_val, x.pmd, x.pmd >> 32); +} + +static inline unsigned long long pgd_val(pgd_t x) +{ + return PVOP_CALL2(unsigned long long, pgd_val, x.pgd, x.pgd >> 32); +} + +static inline void set_pte(pte_t *ptep, pte_t pteval) +{ + PVOP_VCALL3(set_pte, ptep, pteval.pte_low, pteval.pte_high); +} + +static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pteval) +{ + /* 5 arg words */ + paravirt_ops.set_pte_at(mm, addr, ptep, pteval); +} + static inline void set_pte_atomic(pte_t *ptep, pte_t pteval) { - paravirt_ops.set_pte_atomic(ptep, pteval); + PVOP_VCALL3(set_pte_atomic, ptep, pteval.pte_low, pteval.pte_high); } -static inline void set_pte_present(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) +static inline void set_pte_present(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte) { + /* 5 arg words */ paravirt_ops.set_pte_present(mm, addr, ptep, pte); } +static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval) +{ + PVOP_VCALL3(set_pmd, pmdp, pmdval.pmd, pmdval.pmd >> 32); +} + static inline void set_pud(pud_t *pudp, pud_t pudval) { - paravirt_ops.set_pud(pudp, pudval); + PVOP_VCALL3(set_pud, pudp, pudval.pgd.pgd, pudval.pgd.pgd >> 32); } static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { - paravirt_ops.pte_clear(mm, addr, ptep); + PVOP_VCALL3(pte_clear, mm, addr, ptep); } static inline void pmd_clear(pmd_t *pmdp) { - paravirt_ops.pmd_clear(pmdp); + PVOP_VCALL1(pmd_clear, pmdp); } -#endif -/* Lazy mode for batching updates / context switch */ -#define PARAVIRT_LAZY_NONE 0 -#define PARAVIRT_LAZY_MMU 1 -#define PARAVIRT_LAZY_CPU 2 -#define PARAVIRT_LAZY_FLUSH 3 +#else /* !CONFIG_X86_PAE */ + +static inline pte_t __pte(unsigned long val) +{ + return (pte_t) { PVOP_CALL1(unsigned long, make_pte, val) }; +} + +static inline pgd_t __pgd(unsigned long val) +{ + return (pgd_t) { PVOP_CALL1(unsigned long, make_pgd, val) }; +} + +static inline unsigned long pte_val(pte_t x) +{ + return PVOP_CALL1(unsigned long, pte_val, x.pte_low); +} + +static inline unsigned long pgd_val(pgd_t x) +{ + return PVOP_CALL1(unsigned long, pgd_val, x.pgd); +} + +static inline void set_pte(pte_t *ptep, pte_t pteval) +{ + PVOP_VCALL2(set_pte, ptep, pteval.pte_low); +} + +static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pteval) +{ + PVOP_VCALL4(set_pte_at, mm, addr, ptep, pteval.pte_low); +} + +static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval) +{ + PVOP_VCALL2(set_pmd, pmdp, pmdval.pud.pgd.pgd); +} +#endif /* CONFIG_X86_PAE */ #define __HAVE_ARCH_ENTER_LAZY_CPU_MODE -#define arch_enter_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_CPU) -#define arch_leave_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE) -#define arch_flush_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_FLUSH) +static inline void arch_enter_lazy_cpu_mode(void) +{ + PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_CPU); +} + +static inline void arch_leave_lazy_cpu_mode(void) +{ + PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE); +} + +static inline void arch_flush_lazy_cpu_mode(void) +{ + PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH); +} + #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE -#define arch_enter_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_MMU) -#define arch_leave_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE) -#define arch_flush_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_FLUSH) +static inline void arch_enter_lazy_mmu_mode(void) +{ + PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_MMU); +} + +static inline void arch_leave_lazy_mmu_mode(void) +{ + PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_NONE); +} + +static inline void arch_flush_lazy_mmu_mode(void) +{ + PVOP_VCALL1(set_lazy_mode, PARAVIRT_LAZY_FLUSH); +} + +void _paravirt_nop(void); +#define paravirt_nop ((void *)_paravirt_nop) /* These all sit in the .parainstructions section to tell us what to patch. */ -struct paravirt_patch { +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 */ }; -#define paravirt_alt(insn_string, typenum, clobber) \ - "771:\n\t" insn_string "\n" "772:\n" \ - ".pushsection .parainstructions,\"a\"\n" \ - " .long 771b\n" \ - " .byte " __stringify(typenum) "\n" \ - " .byte 772b-771b\n" \ - " .short " __stringify(clobber) "\n" \ - ".popsection" +extern struct paravirt_patch_site __parainstructions[], + __parainstructions_end[]; static inline unsigned long __raw_local_save_flags(void) { unsigned long f; - __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;" - "call *%1;" - "popl %%edx; popl %%ecx", - PARAVIRT_SAVE_FLAGS, CLBR_NONE) - : "=a"(f): "m"(paravirt_ops.save_fl) - : "memory", "cc"); + asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;" + PARAVIRT_CALL + "popl %%edx; popl %%ecx") + : "=a"(f) + : paravirt_type(save_fl), + paravirt_clobber(CLBR_EAX) + : "memory", "cc"); return f; } static inline void raw_local_irq_restore(unsigned long f) { - __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;" - "call *%1;" - "popl %%edx; popl %%ecx", - PARAVIRT_RESTORE_FLAGS, CLBR_EAX) - : "=a"(f) : "m" (paravirt_ops.restore_fl), "0"(f) - : "memory", "cc"); + asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;" + PARAVIRT_CALL + "popl %%edx; popl %%ecx") + : "=a"(f) + : "0"(f), + paravirt_type(restore_fl), + paravirt_clobber(CLBR_EAX) + : "memory", "cc"); } static inline void raw_local_irq_disable(void) { - __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;" - "call *%0;" - "popl %%edx; popl %%ecx", - PARAVIRT_IRQ_DISABLE, CLBR_EAX) - : : "m" (paravirt_ops.irq_disable) - : "memory", "eax", "cc"); + asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;" + PARAVIRT_CALL + "popl %%edx; popl %%ecx") + : + : paravirt_type(irq_disable), + paravirt_clobber(CLBR_EAX) + : "memory", "eax", "cc"); } static inline void raw_local_irq_enable(void) { - __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;" - "call *%0;" - "popl %%edx; popl %%ecx", - PARAVIRT_IRQ_ENABLE, CLBR_EAX) - : : "m" (paravirt_ops.irq_enable) - : "memory", "eax", "cc"); + asm volatile(paravirt_alt("pushl %%ecx; pushl %%edx;" + PARAVIRT_CALL + "popl %%edx; popl %%ecx") + : + : paravirt_type(irq_enable), + paravirt_clobber(CLBR_EAX) + : "memory", "eax", "cc"); } static inline unsigned long __raw_local_irq_save(void) { unsigned long f; - __asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;" - "call *%1; pushl %%eax;" - "call *%2; popl %%eax;" - "popl %%edx; popl %%ecx", - PARAVIRT_SAVE_FLAGS_IRQ_DISABLE, - CLBR_NONE) - : "=a"(f) - : "m" (paravirt_ops.save_fl), - "m" (paravirt_ops.irq_disable) - : "memory", "cc"); + f = __raw_local_save_flags(); + raw_local_irq_disable(); return f; } -#define CLI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;" \ - "call *paravirt_ops+%c[irq_disable];" \ - "popl %%edx; popl %%ecx", \ - PARAVIRT_IRQ_DISABLE, CLBR_EAX) +#define CLI_STRING \ + _paravirt_alt("pushl %%ecx; pushl %%edx;" \ + "call *paravirt_ops+%c[paravirt_cli_type]*4;" \ + "popl %%edx; popl %%ecx", \ + "%c[paravirt_cli_type]", "%c[paravirt_clobber]") + +#define STI_STRING \ + _paravirt_alt("pushl %%ecx; pushl %%edx;" \ + "call *paravirt_ops+%c[paravirt_sti_type]*4;" \ + "popl %%edx; popl %%ecx", \ + "%c[paravirt_sti_type]", "%c[paravirt_clobber]") -#define STI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;" \ - "call *paravirt_ops+%c[irq_enable];" \ - "popl %%edx; popl %%ecx", \ - PARAVIRT_IRQ_ENABLE, CLBR_EAX) #define CLI_STI_CLOBBERS , "%eax" -#define CLI_STI_INPUT_ARGS \ +#define CLI_STI_INPUT_ARGS \ , \ - [irq_disable] "i" (offsetof(struct paravirt_ops, irq_disable)), \ - [irq_enable] "i" (offsetof(struct paravirt_ops, irq_enable)) + [paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)), \ + [paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)), \ + paravirt_clobber(CLBR_EAX) + +/* Make sure as little as possible of this mess escapes. */ +#undef PARAVIRT_CALL +#undef __PVOP_CALL +#undef __PVOP_VCALL +#undef PVOP_VCALL0 +#undef PVOP_CALL0 +#undef PVOP_VCALL1 +#undef PVOP_CALL1 +#undef PVOP_VCALL2 +#undef PVOP_CALL2 +#undef PVOP_VCALL3 +#undef PVOP_CALL3 +#undef PVOP_VCALL4 +#undef PVOP_CALL4 #else /* __ASSEMBLY__ */ -#define PARA_PATCH(ptype, clobbers, ops) \ +#define PARA_PATCH(off) ((off) / 4) + +#define PARA_SITE(ptype, clobbers, ops) \ 771:; \ ops; \ 772:; \ @@ -538,28 +1049,30 @@ static inline unsigned long __raw_local_irq_save(void) .short clobbers; \ .popsection -#define INTERRUPT_RETURN \ - PARA_PATCH(PARAVIRT_INTERRUPT_RETURN, CLBR_ANY, \ - jmp *%cs:paravirt_ops+PARAVIRT_iret) +#define INTERRUPT_RETURN \ + PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE, \ + jmp *%cs:paravirt_ops+PARAVIRT_iret) -#define DISABLE_INTERRUPTS(clobbers) \ - PARA_PATCH(PARAVIRT_IRQ_DISABLE, clobbers, \ - pushl %ecx; pushl %edx; \ - call *paravirt_ops+PARAVIRT_irq_disable; \ - popl %edx; popl %ecx) \ +#define DISABLE_INTERRUPTS(clobbers) \ + PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers, \ + pushl %eax; pushl %ecx; pushl %edx; \ + call *%cs:paravirt_ops+PARAVIRT_irq_disable; \ + popl %edx; popl %ecx; popl %eax) \ -#define ENABLE_INTERRUPTS(clobbers) \ - PARA_PATCH(PARAVIRT_IRQ_ENABLE, clobbers, \ - pushl %ecx; pushl %edx; \ - call *%cs:paravirt_ops+PARAVIRT_irq_enable; \ - popl %edx; popl %ecx) +#define ENABLE_INTERRUPTS(clobbers) \ + PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers, \ + pushl %eax; pushl %ecx; pushl %edx; \ + call *%cs:paravirt_ops+PARAVIRT_irq_enable; \ + popl %edx; popl %ecx; popl %eax) -#define ENABLE_INTERRUPTS_SYSEXIT \ - PARA_PATCH(PARAVIRT_STI_SYSEXIT, CLBR_ANY, \ - jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit) +#define ENABLE_INTERRUPTS_SYSEXIT \ + PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE, \ + jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit) #define GET_CR0_INTO_EAX \ - call *paravirt_ops+PARAVIRT_read_cr0 + push %ecx; push %edx; \ + call *paravirt_ops+PARAVIRT_read_cr0; \ + pop %edx; pop %ecx #endif /* __ASSEMBLY__ */ #endif /* CONFIG_PARAVIRT */ |