[net-next-2.6.git] / include / asm-i386 / paravirt.h

#ifndef __ASM_PARAVIRT_H
#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

/* Bitmask of what can be clobbered: usually at least eax. */
#define CLBR_NONE 0x0
#define CLBR_EAX 0x1
#define CLBR_ECX 0x2
#define CLBR_EDX 0x4
#define CLBR_ANY 0x7

#ifndef __ASSEMBLY__
struct thread_struct;
struct Xgt_desc_struct;
struct tss_struct;
struct mm_struct;
struct paravirt_ops
{
	unsigned int kernel_rpl;
 	int paravirt_enabled;
	const char *name;

	/*
	 * Patch may replace one of the defined code sequences with arbitrary
	 * code, subject to the same register constraints.  This generally
	 * means the code is not free to clobber any registers other than EAX.
	 * The patch function should return the number of bytes of code
	 * generated, as we nop pad the rest in generic code.
	 */
	unsigned (*patch)(u8 type, u16 clobber, void *firstinsn, unsigned len);

	void (*arch_setup)(void);
	char *(*memory_setup)(void);
	void (*init_IRQ)(void);

	void (*banner)(void);

	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. */

	void (fastcall *cpuid)(unsigned int *eax, unsigned int *ebx,
		      unsigned int *ecx, unsigned int *edx);

	unsigned long (fastcall *get_debugreg)(int regno);
	void (fastcall *set_debugreg)(int regno, unsigned long value);

	void (fastcall *clts)(void);

	unsigned long (fastcall *read_cr0)(void);
	void (fastcall *write_cr0)(unsigned long);

	unsigned long (fastcall *read_cr2)(void);
	void (fastcall *write_cr2)(unsigned long);

	unsigned long (fastcall *read_cr3)(void);
	void (fastcall *write_cr3)(unsigned long);

	unsigned long (fastcall *read_cr4_safe)(void);
	unsigned long (fastcall *read_cr4)(void);
	void (fastcall *write_cr4)(unsigned long);

	unsigned long (fastcall *save_fl)(void);
	void (fastcall *restore_fl)(unsigned long);
	void (fastcall *irq_disable)(void);
	void (fastcall *irq_enable)(void);
	void (fastcall *safe_halt)(void);
	void (fastcall *halt)(void);
	void (fastcall *wbinvd)(void);

	/* err = 0/-EFAULT.  wrmsr returns 0/-EFAULT. */
	u64 (fastcall *read_msr)(unsigned int msr, int *err);
	int (fastcall *write_msr)(unsigned int msr, u64 val);

	u64 (fastcall *read_tsc)(void);
	u64 (fastcall *read_pmc)(void);

	void (fastcall *load_tr_desc)(void);
	void (fastcall *load_gdt)(const struct Xgt_desc_struct *);
	void (fastcall *load_idt)(const struct Xgt_desc_struct *);
	void (fastcall *store_gdt)(struct Xgt_desc_struct *);
	void (fastcall *store_idt)(struct Xgt_desc_struct *);
	void (fastcall *set_ldt)(const void *desc, unsigned entries);
	unsigned long (fastcall *store_tr)(void);
	void (fastcall *load_tls)(struct thread_struct *t, unsigned int cpu);
	void (fastcall *write_ldt_entry)(void *dt, int entrynum,
					 u32 low, u32 high);
	void (fastcall *write_gdt_entry)(void *dt, int entrynum,
					 u32 low, u32 high);
	void (fastcall *write_idt_entry)(void *dt, int entrynum,
					 u32 low, u32 high);
	void (fastcall *load_esp0)(struct tss_struct *tss,
				   struct thread_struct *thread);

	void (fastcall *set_iopl_mask)(unsigned mask);

	void (fastcall *io_delay)(void);
	void (*const_udelay)(unsigned long loops);

#ifdef CONFIG_X86_LOCAL_APIC
	void (fastcall *apic_write)(unsigned long reg, unsigned long v);
	void (fastcall *apic_write_atomic)(unsigned long reg, unsigned long v);
	unsigned long (fastcall *apic_read)(unsigned long reg);
	void (*setup_boot_clock)(void);
	void (*setup_secondary_clock)(void);
#endif

	void (fastcall *flush_tlb_user)(void);
	void (fastcall *flush_tlb_kernel)(void);
	void (fastcall *flush_tlb_single)(u32 addr);

	void (fastcall *alloc_pt)(u32 pfn);
	void (fastcall *alloc_pd)(u32 pfn);
	void (fastcall *alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
	void (fastcall *release_pt)(u32 pfn);
	void (fastcall *release_pd)(u32 pfn);

	void (fastcall *set_pte)(pte_t *ptep, pte_t pteval);
	void (fastcall *set_pte_at)(struct mm_struct *mm, u32 addr, pte_t *ptep, pte_t pteval);
	void (fastcall *set_pmd)(pmd_t *pmdp, pmd_t pmdval);
	void (fastcall *pte_update)(struct mm_struct *mm, u32 addr, pte_t *ptep);
	void (fastcall *pte_update_defer)(struct mm_struct *mm, u32 addr, pte_t *ptep);
#ifdef CONFIG_X86_PAE
	void (fastcall *set_pte_atomic)(pte_t *ptep, pte_t pteval);
	void (fastcall *set_pte_present)(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte);
	void (fastcall *set_pud)(pud_t *pudp, pud_t pudval);
	void (fastcall *pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
	void (fastcall *pmd_clear)(pmd_t *pmdp);
#endif

	void (fastcall *set_lazy_mode)(int mode);

	/* These two are jmp to, not actually called. */
	void (fastcall *irq_enable_sysexit)(void);
	void (fastcall *iret)(void);

	void (fastcall *startup_ipi_hook)(int phys_apicid, unsigned long start_eip, unsigned long start_esp);
};

/* Mark a paravirt probe function. */
#define paravirt_probe(fn)						\
 static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \
		__attribute__((__section__(".paravirtprobe"))) = fn

extern struct paravirt_ops paravirt_ops;

#define paravirt_enabled() (paravirt_ops.paravirt_enabled)

static inline void load_esp0(struct tss_struct *tss,
			     struct thread_struct *thread)
{
	paravirt_ops.load_esp0(tss, thread);
}

#define ARCH_SETUP			paravirt_ops.arch_setup();
static inline unsigned long get_wallclock(void)
{
	return paravirt_ops.get_wallclock();
}

static inline int set_wallclock(unsigned long nowtime)
{
	return paravirt_ops.set_wallclock(nowtime);
}

static inline void do_time_init(void)
{
	return paravirt_ops.time_init();
}

/* The paravirtualized CPUID instruction. */
static inline void __cpuid(unsigned int *eax, unsigned int *ebx,
			   unsigned int *ecx, unsigned int *edx)
{
	paravirt_ops.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)

#define clts() paravirt_ops.clts()

#define read_cr0() paravirt_ops.read_cr0()
#define write_cr0(x) paravirt_ops.write_cr0(x)

#define read_cr2() paravirt_ops.read_cr2()
#define write_cr2(x) paravirt_ops.write_cr2(x)

#define read_cr3() paravirt_ops.read_cr3()
#define write_cr3(x) paravirt_ops.write_cr3(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 void raw_safe_halt(void)
{
	paravirt_ops.safe_halt();
}

static inline void halt(void)
{
	paravirt_ops.safe_halt();
}
#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;					\
} while(0)

#define wrmsr(msr,val1,val2) do {				\
	u64 _l = ((u64)(val2) << 32) | (val1);			\
	paravirt_ops.write_msr((msr), _l);			\
} while(0)

#define rdmsrl(msr,val) do {					\
	int _err;						\
	val = paravirt_ops.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);			\
})

/* 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;					\
	_err; })

#define rdtsc(low,high) do {					\
	u64 _l = paravirt_ops.read_tsc();			\
	low = (u32)_l;						\
	high = _l >> 32;					\
} while(0)

#define rdtscl(low) do {					\
	u64 _l = paravirt_ops.read_tsc();			\
	low = (int)_l;						\
} while(0)

#define rdtscll(val) (val = paravirt_ops.read_tsc())

#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;					\
} 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))

/* The paravirtualized I/O functions */
static inline void slow_down_io(void) {
	paravirt_ops.io_delay();
#ifdef REALLY_SLOW_IO
	paravirt_ops.io_delay();
	paravirt_ops.io_delay();
	paravirt_ops.io_delay();
#endif
}

#ifdef CONFIG_X86_LOCAL_APIC
/*
 * Basic functions accessing APICs.
 */
static inline void apic_write(unsigned long reg, unsigned long v)
{
	paravirt_ops.apic_write(reg,v);
}

static inline void apic_write_atomic(unsigned long reg, unsigned long v)
{
	paravirt_ops.apic_write_atomic(reg,v);
}

static inline unsigned long apic_read(unsigned long reg)
{
	return paravirt_ops.apic_read(reg);
}

static inline void setup_boot_clock(void)
{
	paravirt_ops.setup_boot_clock();
}

static inline void setup_secondary_clock(void)
{
	paravirt_ops.setup_secondary_clock();
}
#endif

#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);
}
#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)

#define paravirt_alloc_pt(pfn) paravirt_ops.alloc_pt(pfn)
#define paravirt_release_pt(pfn) paravirt_ops.release_pt(pfn)

#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 set_pte(pte_t *ptep, pte_t pteval)
{
	paravirt_ops.set_pte(ptep, pteval);
}

static inline void set_pte_at(struct mm_struct *mm, u32 addr, pte_t *ptep, pte_t pteval)
{
	paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
}

static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
{
	paravirt_ops.set_pmd(pmdp, pmdval);
}

static inline void pte_update(struct mm_struct *mm, u32 addr, pte_t *ptep)
{
	paravirt_ops.pte_update(mm, addr, ptep);
}

static inline void pte_update_defer(struct mm_struct *mm, u32 addr, pte_t *ptep)
{
	paravirt_ops.pte_update_defer(mm, addr, ptep);
}

#ifdef CONFIG_X86_PAE
static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
{
	paravirt_ops.set_pte_atomic(ptep, pteval);
}

static inline void set_pte_present(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte)
{
	paravirt_ops.set_pte_present(mm, addr, ptep, pte);
}

static inline void set_pud(pud_t *pudp, pud_t pudval)
{
	paravirt_ops.set_pud(pudp, pudval);
}

static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
	paravirt_ops.pte_clear(mm, addr, ptep);
}

static inline void pmd_clear(pmd_t *pmdp)
{
	paravirt_ops.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  __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  __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)

/* These all sit in the .parainstructions section to tell us what to patch. */
struct paravirt_patch {
	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"

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");
	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");
}

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");
}

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");
}

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");
	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 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 \
	,								\
	[irq_disable] "i" (offsetof(struct paravirt_ops, irq_disable)),	\
	[irq_enable] "i" (offsetof(struct paravirt_ops, irq_enable))

#else  /* __ASSEMBLY__ */

#define PARA_PATCH(ptype, clobbers, ops)	\
771:;						\
	ops;					\
772:;						\
	.pushsection .parainstructions,"a";	\
	 .long 771b;				\
	 .byte ptype;				\
	 .byte 772b-771b;			\
	 .short clobbers;			\
	.popsection

#define INTERRUPT_RETURN				\
	PARA_PATCH(PARAVIRT_INTERRUPT_RETURN, CLBR_ANY,	\
	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 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_SYSEXIT			\
	PARA_PATCH(PARAVIRT_STI_SYSEXIT, CLBR_ANY,	\
	jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)

#define GET_CR0_INTO_EAX			\
	call *paravirt_ops+PARAVIRT_read_cr0

#endif /* __ASSEMBLY__ */
#endif /* CONFIG_PARAVIRT */
#endif	/* __ASM_PARAVIRT_H */
Commit	Line	Data
d3561b7f RR	1	#ifndef __ASM_PARAVIRT_H
	2	#define __ASM_PARAVIRT_H
	3	/* Various instructions on x86 need to be replaced for
	4	* para-virtualization: those hooks are defined here. */
	5	#include <linux/linkage.h>
139ec7c4	6	#include <linux/stringify.h>
da181a8b	7	#include <asm/page.h>
d3561b7f RR	8
d3561b7f RR	9	#ifdef CONFIG_PARAVIRT
139ec7c4 RR	10	/* These are the most performance critical ops, so we want to be able to patch
	11	* callers */
	12	#define PARAVIRT_IRQ_DISABLE 0
	13	#define PARAVIRT_IRQ_ENABLE 1
	14	#define PARAVIRT_RESTORE_FLAGS 2
	15	#define PARAVIRT_SAVE_FLAGS 3
	16	#define PARAVIRT_SAVE_FLAGS_IRQ_DISABLE 4
	17	#define PARAVIRT_INTERRUPT_RETURN 5
	18	#define PARAVIRT_STI_SYSEXIT 6
	19
	20	/* Bitmask of what can be clobbered: usually at least eax. */
	21	#define CLBR_NONE 0x0
	22	#define CLBR_EAX 0x1
	23	#define CLBR_ECX 0x2
	24	#define CLBR_EDX 0x4
	25	#define CLBR_ANY 0x7
	26
d3561b7f RR	27	#ifndef __ASSEMBLY__
	28	struct thread_struct;
	29	struct Xgt_desc_struct;
	30	struct tss_struct;
da181a8b	31	struct mm_struct;
d3561b7f RR	32	struct paravirt_ops
	33	{
	34	unsigned int kernel_rpl;
	35	int paravirt_enabled;
	36	const char *name;
	37
139ec7c4 RR	38	/*
	39	* Patch may replace one of the defined code sequences with arbitrary
	40	* code, subject to the same register constraints. This generally
	41	* means the code is not free to clobber any registers other than EAX.
	42	* The patch function should return the number of bytes of code
	43	* generated, as we nop pad the rest in generic code.
	44	*/
	45	unsigned (patch)(u8 type, u16 clobber, void firstinsn, unsigned len);
	46
d3561b7f RR	47	void (*arch_setup)(void);
	48	char (memory_setup)(void);
	49	void (*init_IRQ)(void);
	50
	51	void (*banner)(void);
	52
	53	unsigned long (*get_wallclock)(void);
	54	int (*set_wallclock)(unsigned long);
	55	void (*time_init)(void);
	56
	57	/* All the function pointers here are declared as "fastcall"
	58	so that we get a specific register-based calling
	59	convention. This makes it easier to implement inline
	60	assembler replacements. */
	61
	62	void (fastcall cpuid)(unsigned int eax, unsigned int *ebx,
	63	unsigned int ecx, unsigned int edx);
	64
	65	unsigned long (fastcall *get_debugreg)(int regno);
	66	void (fastcall *set_debugreg)(int regno, unsigned long value);
	67
	68	void (fastcall *clts)(void);
	69
	70	unsigned long (fastcall *read_cr0)(void);
	71	void (fastcall *write_cr0)(unsigned long);
	72
	73	unsigned long (fastcall *read_cr2)(void);
	74	void (fastcall *write_cr2)(unsigned long);
	75
	76	unsigned long (fastcall *read_cr3)(void);
	77	void (fastcall *write_cr3)(unsigned long);
	78
	79	unsigned long (fastcall *read_cr4_safe)(void);
	80	unsigned long (fastcall *read_cr4)(void);
	81	void (fastcall *write_cr4)(unsigned long);
	82
	83	unsigned long (fastcall *save_fl)(void);
	84	void (fastcall *restore_fl)(unsigned long);
	85	void (fastcall *irq_disable)(void);
	86	void (fastcall *irq_enable)(void);
	87	void (fastcall *safe_halt)(void);
	88	void (fastcall *halt)(void);
	89	void (fastcall *wbinvd)(void);
	90
	91	/* err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
	92	u64 (fastcall read_msr)(unsigned int msr, int err);
	93	int (fastcall *write_msr)(unsigned int msr, u64 val);
	94
	95	u64 (fastcall *read_tsc)(void);
	96	u64 (fastcall *read_pmc)(void);
	97
	98	void (fastcall *load_tr_desc)(void);
	99	void (fastcall load_gdt)(const struct Xgt_desc_struct );
	100	void (fastcall load_idt)(const struct Xgt_desc_struct );
	101	void (fastcall store_gdt)(struct Xgt_desc_struct );
	102	void (fastcall store_idt)(struct Xgt_desc_struct );
	103	void (fastcall set_ldt)(const void desc, unsigned entries);
	104	unsigned long (fastcall *store_tr)(void);
	105	void (fastcall load_tls)(struct thread_struct t, unsigned int cpu);
	106	void (fastcall write_ldt_entry)(void dt, int entrynum,
	107	u32 low, u32 high);
	108	void (fastcall write_gdt_entry)(void dt, int entrynum,
	109	u32 low, u32 high);
	110	void (fastcall write_idt_entry)(void dt, int entrynum,
111	u32 low, u32 high);
112	void (fastcall load_esp0)(struct tss_struct tss,
113	struct thread_struct *thread);
114
115	void (fastcall *set_iopl_mask)(unsigned mask);
116
117	void (fastcall *io_delay)(void);
118	void (*const_udelay)(unsigned long loops);
119
13623d79 RR	120	#ifdef CONFIG_X86_LOCAL_APIC
	121	void (fastcall *apic_write)(unsigned long reg, unsigned long v);
	122	void (fastcall *apic_write_atomic)(unsigned long reg, unsigned long v);
	123	unsigned long (fastcall *apic_read)(unsigned long reg);
bbab4f3b ZA	124	void (*setup_boot_clock)(void);
bbab4f3b ZA	125	void (*setup_secondary_clock)(void);
13623d79 RR	126	#endif
13623d79 RR	127
da181a8b RR	128	void (fastcall *flush_tlb_user)(void);
	129	void (fastcall *flush_tlb_kernel)(void);
	130	void (fastcall *flush_tlb_single)(u32 addr);
	131
c119ecce ZA	132	void (fastcall *alloc_pt)(u32 pfn);
	133	void (fastcall *alloc_pd)(u32 pfn);
	134	void (fastcall *alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
	135	void (fastcall *release_pt)(u32 pfn);
	136	void (fastcall *release_pd)(u32 pfn);
	137
da181a8b RR	138	void (fastcall set_pte)(pte_t ptep, pte_t pteval);
	139	void (fastcall set_pte_at)(struct mm_struct mm, u32 addr, pte_t *ptep, pte_t pteval);
	140	void (fastcall set_pmd)(pmd_t pmdp, pmd_t pmdval);
	141	void (fastcall pte_update)(struct mm_struct mm, u32 addr, pte_t *ptep);
	142	void (fastcall pte_update_defer)(struct mm_struct mm, u32 addr, pte_t *ptep);
	143	#ifdef CONFIG_X86_PAE
	144	void (fastcall set_pte_atomic)(pte_t ptep, pte_t pteval);
	145	void (fastcall set_pte_present)(struct mm_struct mm, unsigned long addr, pte_t *ptep, pte_t pte);
	146	void (fastcall set_pud)(pud_t pudp, pud_t pudval);
	147	void (fastcall pte_clear)(struct mm_struct mm, unsigned long addr, pte_t *ptep);
	148	void (fastcall pmd_clear)(pmd_t pmdp);
	149	#endif
	150
9226d125 ZA	151	void (fastcall *set_lazy_mode)(int mode);
9226d125 ZA	152
d3561b7f RR	153	/* These two are jmp to, not actually called. */
	154	void (fastcall *irq_enable_sysexit)(void);
	155	void (fastcall *iret)(void);
ae5da273 ZA	156
ae5da273 ZA	157	void (fastcall *startup_ipi_hook)(int phys_apicid, unsigned long start_eip, unsigned long start_esp);
d3561b7f RR	158	};
d3561b7f RR	159
c9ccf30d RR	160	/* Mark a paravirt probe function. */
	161	#define paravirt_probe(fn) \
	162	static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \
	163	__attribute__((__section__(".paravirtprobe"))) = fn
	164
d3561b7f RR	165	extern struct paravirt_ops paravirt_ops;
	166
	167	#define paravirt_enabled() (paravirt_ops.paravirt_enabled)
	168
	169	static inline void load_esp0(struct tss_struct *tss,
	170	struct thread_struct *thread)
	171	{
	172	paravirt_ops.load_esp0(tss, thread);
	173	}
	174
	175	#define ARCH_SETUP paravirt_ops.arch_setup();
	176	static inline unsigned long get_wallclock(void)
	177	{
	178	return paravirt_ops.get_wallclock();
	179	}
	180
	181	static inline int set_wallclock(unsigned long nowtime)
	182	{
	183	return paravirt_ops.set_wallclock(nowtime);
	184	}
	185
	186	static inline void do_time_init(void)
	187	{
	188	return paravirt_ops.time_init();
	189	}
	190
	191	/* The paravirtualized CPUID instruction. */
	192	static inline void __cpuid(unsigned int eax, unsigned int ebx,
	193	unsigned int ecx, unsigned int edx)
	194	{
	195	paravirt_ops.cpuid(eax, ebx, ecx, edx);
	196	}
	197
	198	/*
	199	* These special macros can be used to get or set a debugging register
	200	*/
	201	#define get_debugreg(var, reg) var = paravirt_ops.get_debugreg(reg)
	202	#define set_debugreg(val, reg) paravirt_ops.set_debugreg(reg, val)
	203
	204	#define clts() paravirt_ops.clts()
	205
	206	#define read_cr0() paravirt_ops.read_cr0()
	207	#define write_cr0(x) paravirt_ops.write_cr0(x)
	208
	209	#define read_cr2() paravirt_ops.read_cr2()
	210	#define write_cr2(x) paravirt_ops.write_cr2(x)
	211
	212	#define read_cr3() paravirt_ops.read_cr3()
	213	#define write_cr3(x) paravirt_ops.write_cr3(x)
	214
	215	#define read_cr4() paravirt_ops.read_cr4()
	216	#define read_cr4_safe(x) paravirt_ops.read_cr4_safe()
	217	#define write_cr4(x) paravirt_ops.write_cr4(x)
	218
d3561b7f RR	219	static inline void raw_safe_halt(void)
	220	{
	221	paravirt_ops.safe_halt();
	222	}
	223
	224	static inline void halt(void)
	225	{
	226	paravirt_ops.safe_halt();
	227	}
	228	#define wbinvd() paravirt_ops.wbinvd()
	229
	230	#define get_kernel_rpl() (paravirt_ops.kernel_rpl)
	231
	232	#define rdmsr(msr,val1,val2) do { \
	233	int _err; \
	234	u64 _l = paravirt_ops.read_msr(msr,&_err); \
	235	val1 = (u32)_l; \
	236	val2 = _l >> 32; \
	237	} while(0)
	238
	239	#define wrmsr(msr,val1,val2) do { \
	240	u64 _l = ((u64)(val2) << 32) \| (val1); \
	241	paravirt_ops.write_msr((msr), _l); \
	242	} while(0)
	243
	244	#define rdmsrl(msr,val) do { \
	245	int _err; \
	246	val = paravirt_ops.read_msr((msr),&_err); \
	247	} while(0)
	248
	249	#define wrmsrl(msr,val) (paravirt_ops.write_msr((msr),(val)))
	250	#define wrmsr_safe(msr,a,b) ({ \
	251	u64 _l = ((u64)(b) << 32) \| (a); \
	252	paravirt_ops.write_msr((msr),_l); \
	253	})
	254
	255	/* rdmsr with exception handling */
	256	#define rdmsr_safe(msr,a,b) ({ \
	257	int _err; \
	258	u64 _l = paravirt_ops.read_msr(msr,&_err); \
	259	(*a) = (u32)_l; \
	260	(*b) = _l >> 32; \
	261	_err; })
	262
	263	#define rdtsc(low,high) do { \
	264	u64 _l = paravirt_ops.read_tsc(); \
	265	low = (u32)_l; \
	266	high = _l >> 32; \
	267	} while(0)
	268
	269	#define rdtscl(low) do { \
	270	u64 _l = paravirt_ops.read_tsc(); \
	271	low = (int)_l; \
	272	} while(0)
	273
	274	#define rdtscll(val) (val = paravirt_ops.read_tsc())
	275
	276	#define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
	277
	278	#define rdpmc(counter,low,high) do { \
	279	u64 _l = paravirt_ops.read_pmc(); \
	280	low = (u32)_l; \
	281	high = _l >> 32; \
	282	} while(0)
283
284	#define load_TR_desc() (paravirt_ops.load_tr_desc())
285	#define load_gdt(dtr) (paravirt_ops.load_gdt(dtr))
286	#define load_idt(dtr) (paravirt_ops.load_idt(dtr))
287	#define set_ldt(addr, entries) (paravirt_ops.set_ldt((addr), (entries)))
288	#define store_gdt(dtr) (paravirt_ops.store_gdt(dtr))
289	#define store_idt(dtr) (paravirt_ops.store_idt(dtr))
290	#define store_tr(tr) ((tr) = paravirt_ops.store_tr())
291	#define load_TLS(t,cpu) (paravirt_ops.load_tls((t),(cpu)))
292	#define write_ldt_entry(dt, entry, low, high) \
293	(paravirt_ops.write_ldt_entry((dt), (entry), (low), (high)))
294	#define write_gdt_entry(dt, entry, low, high) \
295	(paravirt_ops.write_gdt_entry((dt), (entry), (low), (high)))
296	#define write_idt_entry(dt, entry, low, high) \
297	(paravirt_ops.write_idt_entry((dt), (entry), (low), (high)))
298	#define set_iopl_mask(mask) (paravirt_ops.set_iopl_mask(mask))
299
300	/* The paravirtualized I/O functions */
301	static inline void slow_down_io(void) {
302	paravirt_ops.io_delay();
303	#ifdef REALLY_SLOW_IO
304	paravirt_ops.io_delay();
305	paravirt_ops.io_delay();
306	paravirt_ops.io_delay();
307	#endif
308	}
309
13623d79 RR	310	#ifdef CONFIG_X86_LOCAL_APIC
	311	/*
	312	* Basic functions accessing APICs.
	313	*/
	314	static inline void apic_write(unsigned long reg, unsigned long v)
	315	{
	316	paravirt_ops.apic_write(reg,v);
	317	}
	318
	319	static inline void apic_write_atomic(unsigned long reg, unsigned long v)
	320	{
	321	paravirt_ops.apic_write_atomic(reg,v);
	322	}
	323
	324	static inline unsigned long apic_read(unsigned long reg)
	325	{
	326	return paravirt_ops.apic_read(reg);
	327	}
bbab4f3b ZA	328
	329	static inline void setup_boot_clock(void)
	330	{
	331	paravirt_ops.setup_boot_clock();
	332	}
	333
	334	static inline void setup_secondary_clock(void)
	335	{
	336	paravirt_ops.setup_secondary_clock();
	337	}
13623d79 RR	338	#endif
13623d79 RR	339
ae5da273 ZA	340	#ifdef CONFIG_SMP
	341	static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
	342	unsigned long start_esp)
	343	{
	344	return paravirt_ops.startup_ipi_hook(phys_apicid, start_eip, start_esp);
	345	}
	346	#endif
13623d79	347
da181a8b RR	348	#define __flush_tlb() paravirt_ops.flush_tlb_user()
	349	#define __flush_tlb_global() paravirt_ops.flush_tlb_kernel()
	350	#define __flush_tlb_single(addr) paravirt_ops.flush_tlb_single(addr)
	351
c119ecce ZA	352	#define paravirt_alloc_pt(pfn) paravirt_ops.alloc_pt(pfn)
	353	#define paravirt_release_pt(pfn) paravirt_ops.release_pt(pfn)
	354
	355	#define paravirt_alloc_pd(pfn) paravirt_ops.alloc_pd(pfn)
	356	#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) \
	357	paravirt_ops.alloc_pd_clone(pfn, clonepfn, start, count)
	358	#define paravirt_release_pd(pfn) paravirt_ops.release_pd(pfn)
	359
da181a8b RR	360	static inline void set_pte(pte_t *ptep, pte_t pteval)
	361	{
	362	paravirt_ops.set_pte(ptep, pteval);
	363	}
	364
	365	static inline void set_pte_at(struct mm_struct mm, u32 addr, pte_t ptep, pte_t pteval)
	366	{
	367	paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
	368	}
	369
	370	static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
	371	{
	372	paravirt_ops.set_pmd(pmdp, pmdval);
	373	}
	374
	375	static inline void pte_update(struct mm_struct mm, u32 addr, pte_t ptep)
	376	{
	377	paravirt_ops.pte_update(mm, addr, ptep);
	378	}
	379
	380	static inline void pte_update_defer(struct mm_struct mm, u32 addr, pte_t ptep)
	381	{
	382	paravirt_ops.pte_update_defer(mm, addr, ptep);
	383	}
	384
	385	#ifdef CONFIG_X86_PAE
	386	static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
	387	{
	388	paravirt_ops.set_pte_atomic(ptep, pteval);
	389	}
	390
	391	static inline void set_pte_present(struct mm_struct mm, unsigned long addr, pte_t ptep, pte_t pte)
	392	{
	393	paravirt_ops.set_pte_present(mm, addr, ptep, pte);
	394	}
	395
	396	static inline void set_pud(pud_t *pudp, pud_t pudval)
	397	{
	398	paravirt_ops.set_pud(pudp, pudval);
	399	}
	400
	401	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	402	{
	403	paravirt_ops.pte_clear(mm, addr, ptep);
	404	}
	405
	406	static inline void pmd_clear(pmd_t *pmdp)
	407	{
	408	paravirt_ops.pmd_clear(pmdp);
	409	}
	410	#endif
	411
9226d125 ZA	412	/* Lazy mode for batching updates / context switch */
	413	#define PARAVIRT_LAZY_NONE 0
	414	#define PARAVIRT_LAZY_MMU 1
	415	#define PARAVIRT_LAZY_CPU 2
	416
	417	#define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
	418	#define arch_enter_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_CPU)
	419	#define arch_leave_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE)
	420
	421	#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
	422	#define arch_enter_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_MMU)
	423	#define arch_leave_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE)
	424
139ec7c4 RR	425	/* These all sit in the .parainstructions section to tell us what to patch. */
	426	struct paravirt_patch {
	427	u8 instr; / original instructions */
	428	u8 instrtype; /* type of this instruction */
	429	u8 len; /* length of original instruction */
	430	u16 clobbers; /* what registers you may clobber */
	431	};
	432
	433	#define paravirt_alt(insn_string, typenum, clobber) \
	434	"771:\n\t" insn_string "\n" "772:\n" \
	435	".pushsection .parainstructions,\"a\"\n" \
	436	" .long 771b\n" \
	437	" .byte " __stringify(typenum) "\n" \
	438	" .byte 772b-771b\n" \
	439	" .short " __stringify(clobber) "\n" \
	440	".popsection"
	441
	442	static inline unsigned long __raw_local_save_flags(void)
	443	{
	444	unsigned long f;
	445
	446	__asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
	447	"call *%1;"
	448	"popl %%edx; popl %%ecx",
	449	PARAVIRT_SAVE_FLAGS, CLBR_NONE)
	450	: "=a"(f): "m"(paravirt_ops.save_fl)
	451	: "memory", "cc");
	452	return f;
	453	}
	454
	455	static inline void raw_local_irq_restore(unsigned long f)
	456	{
	457	__asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
	458	"call *%1;"
	459	"popl %%edx; popl %%ecx",
	460	PARAVIRT_RESTORE_FLAGS, CLBR_EAX)
	461	: "=a"(f) : "m" (paravirt_ops.restore_fl), "0"(f)
	462	: "memory", "cc");
	463	}
	464
	465	static inline void raw_local_irq_disable(void)
	466	{
	467	__asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
	468	"call *%0;"
	469	"popl %%edx; popl %%ecx",
	470	PARAVIRT_IRQ_DISABLE, CLBR_EAX)
	471	: : "m" (paravirt_ops.irq_disable)
	472	: "memory", "eax", "cc");
	473	}
	474
	475	static inline void raw_local_irq_enable(void)
	476	{
	477	__asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
	478	"call *%0;"
	479	"popl %%edx; popl %%ecx",
	480	PARAVIRT_IRQ_ENABLE, CLBR_EAX)
	481	: : "m" (paravirt_ops.irq_enable)
	482	: "memory", "eax", "cc");
	483	}
	484
	485	static inline unsigned long __raw_local_irq_save(void)
	486	{
	487	unsigned long f;
	488
489	__asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
490	"call *%1; pushl %%eax;"
491	"call *%2; popl %%eax;"
492	"popl %%edx; popl %%ecx",
493	PARAVIRT_SAVE_FLAGS_IRQ_DISABLE,
494	CLBR_NONE)
495	: "=a"(f)
496	: "m" (paravirt_ops.save_fl),
497	"m" (paravirt_ops.irq_disable)
498	: "memory", "cc");
499	return f;
500	}
501
502	#define CLI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;" \
503	"call *paravirt_ops+%c[irq_disable];" \
504	"popl %%edx; popl %%ecx", \
505	PARAVIRT_IRQ_DISABLE, CLBR_EAX)
506
507	#define STI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;" \
508	"call *paravirt_ops+%c[irq_enable];" \
509	"popl %%edx; popl %%ecx", \
510	PARAVIRT_IRQ_ENABLE, CLBR_EAX)
511	#define CLI_STI_CLOBBERS , "%eax"
512	#define CLI_STI_INPUT_ARGS \
513	, \
514	[irq_disable] "i" (offsetof(struct paravirt_ops, irq_disable)), \
515	[irq_enable] "i" (offsetof(struct paravirt_ops, irq_enable))
516
d3561b7f RR	517	#else /* __ASSEMBLY__ */
d3561b7f RR	518
139ec7c4 RR	519	#define PARA_PATCH(ptype, clobbers, ops) \
	520	771:; \
	521	ops; \
	522	772:; \
	523	.pushsection .parainstructions,"a"; \
	524	.long 771b; \
	525	.byte ptype; \
	526	.byte 772b-771b; \
	527	.short clobbers; \
	528	.popsection
	529
	530	#define INTERRUPT_RETURN \
	531	PARA_PATCH(PARAVIRT_INTERRUPT_RETURN, CLBR_ANY, \
	532	jmp *%cs:paravirt_ops+PARAVIRT_iret)
	533
	534	#define DISABLE_INTERRUPTS(clobbers) \
	535	PARA_PATCH(PARAVIRT_IRQ_DISABLE, clobbers, \
	536	pushl %ecx; pushl %edx; \
	537	call *paravirt_ops+PARAVIRT_irq_disable; \
	538	popl %edx; popl %ecx) \
	539
	540	#define ENABLE_INTERRUPTS(clobbers) \
	541	PARA_PATCH(PARAVIRT_IRQ_ENABLE, clobbers, \
	542	pushl %ecx; pushl %edx; \
	543	call *%cs:paravirt_ops+PARAVIRT_irq_enable; \
	544	popl %edx; popl %ecx)
	545
	546	#define ENABLE_INTERRUPTS_SYSEXIT \
	547	PARA_PATCH(PARAVIRT_STI_SYSEXIT, CLBR_ANY, \
	548	jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
	549
	550	#define GET_CR0_INTO_EAX \
	551	call *paravirt_ops+PARAVIRT_read_cr0
	552
d3561b7f RR	553	#endif /* __ASSEMBLY__ */
	554	#endif /* CONFIG_PARAVIRT */
	555	#endif /* __ASM_PARAVIRT_H */