[deliverable/linux.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 desc_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 (*cpuid)(unsigned int *eax, unsigned int *ebx,
		      unsigned int *ecx, unsigned int *edx);

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

	void (*clts)(void);

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

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

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

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

	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. */
	u64 (*read_msr)(unsigned int msr, int *err);
	int (*write_msr)(unsigned int msr, u64 val);

	u64 (*read_tsc)(void);
	u64 (*read_pmc)(void);
 	u64 (*get_scheduled_cycles)(void);
	unsigned long (*get_cpu_khz)(void);

	void (*load_tr_desc)(void);
	void (*load_gdt)(const struct Xgt_desc_struct *);
	void (*load_idt)(const struct Xgt_desc_struct *);
	void (*store_gdt)(struct Xgt_desc_struct *);
	void (*store_idt)(struct Xgt_desc_struct *);
	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)(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);

#ifdef CONFIG_X86_LOCAL_APIC
	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);
#endif

	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 (*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);

	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_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);
#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_pud)(pud_t *pudp, pud_t pudval);
	void (*pte_clear)(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
	void (*pmd_clear)(pmd_t *pmdp);
#endif

	void (*set_lazy_mode)(int 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. */
#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 (*choose_time_init(void))(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)

/* These should all do BUG_ON(_err), but our headers are too tangled. */
#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 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;					\
} 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_map_pt_hook(type, va, pfn) paravirt_ops.map_pt_hook(type, va, pfn)

#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 PARAVIRT_LAZY_FLUSH 3

#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)

#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)

/* 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;
90a0a06a	32	struct desc_struct;
d3561b7f RR	33	struct paravirt_ops
	34	{
	35	unsigned int kernel_rpl;
	36	int paravirt_enabled;
	37	const char *name;
	38
139ec7c4 RR	39	/*
	40	* Patch may replace one of the defined code sequences with arbitrary
	41	* code, subject to the same register constraints. This generally
	42	* means the code is not free to clobber any registers other than EAX.
	43	* The patch function should return the number of bytes of code
	44	* generated, as we nop pad the rest in generic code.
	45	*/
	46	unsigned (patch)(u8 type, u16 clobber, void firstinsn, unsigned len);
	47
d3561b7f RR	48	void (*arch_setup)(void);
	49	char (memory_setup)(void);
	50	void (*init_IRQ)(void);
	51
	52	void (*banner)(void);
	53
	54	unsigned long (*get_wallclock)(void);
	55	int (*set_wallclock)(unsigned long);
	56	void (*time_init)(void);
	57
	58	/* All the function pointers here are declared as "fastcall"
	59	so that we get a specific register-based calling
	60	convention. This makes it easier to implement inline
	61	assembler replacements. */
	62
1a1eecd1	63	void (cpuid)(unsigned int eax, unsigned int *ebx,
d3561b7f RR	64	unsigned int ecx, unsigned int edx);
d3561b7f RR	65
1a1eecd1 AK	66	unsigned long (*get_debugreg)(int regno);
1a1eecd1 AK	67	void (*set_debugreg)(int regno, unsigned long value);
d3561b7f	68
1a1eecd1	69	void (*clts)(void);
d3561b7f	70
1a1eecd1 AK	71	unsigned long (*read_cr0)(void);
1a1eecd1 AK	72	void (*write_cr0)(unsigned long);
d3561b7f	73
1a1eecd1 AK	74	unsigned long (*read_cr2)(void);
1a1eecd1 AK	75	void (*write_cr2)(unsigned long);
d3561b7f	76
1a1eecd1 AK	77	unsigned long (*read_cr3)(void);
1a1eecd1 AK	78	void (*write_cr3)(unsigned long);
d3561b7f	79
1a1eecd1 AK	80	unsigned long (*read_cr4_safe)(void);
	81	unsigned long (*read_cr4)(void);
	82	void (*write_cr4)(unsigned long);
d3561b7f	83
1a1eecd1 AK	84	unsigned long (*save_fl)(void);
	85	void (*restore_fl)(unsigned long);
	86	void (*irq_disable)(void);
	87	void (*irq_enable)(void);
	88	void (*safe_halt)(void);
	89	void (*halt)(void);
	90	void (*wbinvd)(void);
d3561b7f RR	91
d3561b7f RR	92	/* err = 0/-EFAULT. wrmsr returns 0/-EFAULT. */
1a1eecd1 AK	93	u64 (read_msr)(unsigned int msr, int err);
	94	int (*write_msr)(unsigned int msr, u64 val);
	95
	96	u64 (*read_tsc)(void);
	97	u64 (*read_pmc)(void);
6cb9a835	98	u64 (*get_scheduled_cycles)(void);
1182d852	99	unsigned long (*get_cpu_khz)(void);
1a1eecd1 AK	100
	101	void (*load_tr_desc)(void);
	102	void (load_gdt)(const struct Xgt_desc_struct );
	103	void (load_idt)(const struct Xgt_desc_struct );
	104	void (store_gdt)(struct Xgt_desc_struct );
	105	void (store_idt)(struct Xgt_desc_struct );
	106	void (set_ldt)(const void desc, unsigned entries);
	107	unsigned long (*store_tr)(void);
	108	void (load_tls)(struct thread_struct t, unsigned int cpu);
90a0a06a RR	109	void (write_ldt_entry)(struct desc_struct ,
	110	int entrynum, u32 low, u32 high);
	111	void (write_gdt_entry)(struct desc_struct ,
	112	int entrynum, u32 low, u32 high);
	113	void (write_idt_entry)(struct desc_struct ,
	114	int entrynum, u32 low, u32 high);
	115	void (load_esp0)(struct tss_struct tss, struct thread_struct *t);
d3561b7f	116
1a1eecd1	117	void (*set_iopl_mask)(unsigned mask);
d3561b7f	118
1a1eecd1	119	void (*io_delay)(void);
d3561b7f	120
13623d79	121	#ifdef CONFIG_X86_LOCAL_APIC
1a1eecd1 AK	122	void (*apic_write)(unsigned long reg, unsigned long v);
	123	void (*apic_write_atomic)(unsigned long reg, unsigned long v);
	124	unsigned long (*apic_read)(unsigned long reg);
bbab4f3b ZA	125	void (*setup_boot_clock)(void);
bbab4f3b ZA	126	void (*setup_secondary_clock)(void);
13623d79 RR	127	#endif
13623d79 RR	128
1a1eecd1 AK	129	void (*flush_tlb_user)(void);
	130	void (*flush_tlb_kernel)(void);
	131	void (*flush_tlb_single)(u32 addr);
	132
192cd59b	133	void (map_pt_hook)(int type, pte_t va, u32 pfn);
9a1c13e9	134
1a1eecd1 AK	135	void (*alloc_pt)(u32 pfn);
	136	void (*alloc_pd)(u32 pfn);
	137	void (*alloc_pd_clone)(u32 pfn, u32 clonepfn, u32 start, u32 count);
	138	void (*release_pt)(u32 pfn);
	139	void (*release_pd)(u32 pfn);
	140
	141	void (set_pte)(pte_t ptep, pte_t pteval);
	142	void (set_pte_at)(struct mm_struct mm, u32 addr, pte_t *ptep, pte_t pteval);
	143	void (set_pmd)(pmd_t pmdp, pmd_t pmdval);
	144	void (pte_update)(struct mm_struct mm, u32 addr, pte_t *ptep);
	145	void (pte_update_defer)(struct mm_struct mm, u32 addr, pte_t *ptep);
da181a8b	146	#ifdef CONFIG_X86_PAE
1a1eecd1 AK	147	void (set_pte_atomic)(pte_t ptep, pte_t pteval);
	148	void (set_pte_present)(struct mm_struct mm, unsigned long addr, pte_t *ptep, pte_t pte);
	149	void (set_pud)(pud_t pudp, pud_t pudval);
	150	void (pte_clear)(struct mm_struct mm, unsigned long addr, pte_t *ptep);
	151	void (pmd_clear)(pmd_t pmdp);
da181a8b RR	152	#endif
da181a8b RR	153
1a1eecd1	154	void (*set_lazy_mode)(int mode);
9226d125	155
d3561b7f	156	/* These two are jmp to, not actually called. */
1a1eecd1 AK	157	void (*irq_enable_sysexit)(void);
1a1eecd1 AK	158	void (*iret)(void);
ae5da273	159
1a1eecd1	160	void (*startup_ipi_hook)(int phys_apicid, unsigned long start_eip, unsigned long start_esp);
d3561b7f RR	161	};
d3561b7f RR	162
c9ccf30d RR	163	/* Mark a paravirt probe function. */
	164	#define paravirt_probe(fn) \
	165	static asmlinkage void (*__paravirtprobe_##fn)(void) __attribute_used__ \
	166	__attribute__((__section__(".paravirtprobe"))) = fn
	167
d3561b7f RR	168	extern struct paravirt_ops paravirt_ops;
	169
	170	#define paravirt_enabled() (paravirt_ops.paravirt_enabled)
	171
	172	static inline void load_esp0(struct tss_struct *tss,
	173	struct thread_struct *thread)
	174	{
	175	paravirt_ops.load_esp0(tss, thread);
	176	}
	177
	178	#define ARCH_SETUP paravirt_ops.arch_setup();
	179	static inline unsigned long get_wallclock(void)
	180	{
	181	return paravirt_ops.get_wallclock();
	182	}
	183
	184	static inline int set_wallclock(unsigned long nowtime)
	185	{
	186	return paravirt_ops.set_wallclock(nowtime);
	187	}
	188
e30fab3a	189	static inline void (*choose_time_init(void))(void)
d3561b7f	190	{
e30fab3a	191	return paravirt_ops.time_init;
d3561b7f RR	192	}
	193
	194	/* The paravirtualized CPUID instruction. */
	195	static inline void __cpuid(unsigned int eax, unsigned int ebx,
	196	unsigned int ecx, unsigned int edx)
	197	{
	198	paravirt_ops.cpuid(eax, ebx, ecx, edx);
	199	}
	200
	201	/*
	202	* These special macros can be used to get or set a debugging register
	203	*/
	204	#define get_debugreg(var, reg) var = paravirt_ops.get_debugreg(reg)
	205	#define set_debugreg(val, reg) paravirt_ops.set_debugreg(reg, val)
	206
	207	#define clts() paravirt_ops.clts()
	208
	209	#define read_cr0() paravirt_ops.read_cr0()
	210	#define write_cr0(x) paravirt_ops.write_cr0(x)
	211
	212	#define read_cr2() paravirt_ops.read_cr2()
	213	#define write_cr2(x) paravirt_ops.write_cr2(x)
	214
	215	#define read_cr3() paravirt_ops.read_cr3()
	216	#define write_cr3(x) paravirt_ops.write_cr3(x)
	217
	218	#define read_cr4() paravirt_ops.read_cr4()
	219	#define read_cr4_safe(x) paravirt_ops.read_cr4_safe()
	220	#define write_cr4(x) paravirt_ops.write_cr4(x)
	221
d3561b7f RR	222	static inline void raw_safe_halt(void)
	223	{
	224	paravirt_ops.safe_halt();
	225	}
	226
	227	static inline void halt(void)
	228	{
	229	paravirt_ops.safe_halt();
	230	}
	231	#define wbinvd() paravirt_ops.wbinvd()
	232
	233	#define get_kernel_rpl() (paravirt_ops.kernel_rpl)
	234
90a0a06a	235	/* These should all do BUG_ON(_err), but our headers are too tangled. */
d3561b7f RR	236	#define rdmsr(msr,val1,val2) do { \
	237	int _err; \
	238	u64 _l = paravirt_ops.read_msr(msr,&_err); \
	239	val1 = (u32)_l; \
	240	val2 = _l >> 32; \
	241	} while(0)
	242
	243	#define wrmsr(msr,val1,val2) do { \
	244	u64 _l = ((u64)(val2) << 32) \| (val1); \
	245	paravirt_ops.write_msr((msr), _l); \
	246	} while(0)
	247
	248	#define rdmsrl(msr,val) do { \
	249	int _err; \
	250	val = paravirt_ops.read_msr((msr),&_err); \
	251	} while(0)
	252
	253	#define wrmsrl(msr,val) (paravirt_ops.write_msr((msr),(val)))
	254	#define wrmsr_safe(msr,a,b) ({ \
	255	u64 _l = ((u64)(b) << 32) \| (a); \
	256	paravirt_ops.write_msr((msr),_l); \
	257	})
	258
	259	/* rdmsr with exception handling */
	260	#define rdmsr_safe(msr,a,b) ({ \
	261	int _err; \
	262	u64 _l = paravirt_ops.read_msr(msr,&_err); \
	263	(*a) = (u32)_l; \
	264	(*b) = _l >> 32; \
	265	_err; })
	266
	267	#define rdtsc(low,high) do { \
	268	u64 _l = paravirt_ops.read_tsc(); \
	269	low = (u32)_l; \
	270	high = _l >> 32; \
	271	} while(0)
	272
	273	#define rdtscl(low) do { \
	274	u64 _l = paravirt_ops.read_tsc(); \
	275	low = (int)_l; \
	276	} while(0)
	277
	278	#define rdtscll(val) (val = paravirt_ops.read_tsc())
	279
6cb9a835	280	#define get_scheduled_cycles(val) (val = paravirt_ops.get_scheduled_cycles())
1182d852	281	#define calculate_cpu_khz() (paravirt_ops.get_cpu_khz())
6cb9a835	282
d3561b7f RR	283	#define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
	284
	285	#define rdpmc(counter,low,high) do { \
	286	u64 _l = paravirt_ops.read_pmc(); \
	287	low = (u32)_l; \
	288	high = _l >> 32; \
	289	} while(0)
	290
	291	#define load_TR_desc() (paravirt_ops.load_tr_desc())
	292	#define load_gdt(dtr) (paravirt_ops.load_gdt(dtr))
	293	#define load_idt(dtr) (paravirt_ops.load_idt(dtr))
	294	#define set_ldt(addr, entries) (paravirt_ops.set_ldt((addr), (entries)))
	295	#define store_gdt(dtr) (paravirt_ops.store_gdt(dtr))
	296	#define store_idt(dtr) (paravirt_ops.store_idt(dtr))
	297	#define store_tr(tr) ((tr) = paravirt_ops.store_tr())
	298	#define load_TLS(t,cpu) (paravirt_ops.load_tls((t),(cpu)))
	299	#define write_ldt_entry(dt, entry, low, high) \
	300	(paravirt_ops.write_ldt_entry((dt), (entry), (low), (high)))
	301	#define write_gdt_entry(dt, entry, low, high) \
	302	(paravirt_ops.write_gdt_entry((dt), (entry), (low), (high)))
	303	#define write_idt_entry(dt, entry, low, high) \
	304	(paravirt_ops.write_idt_entry((dt), (entry), (low), (high)))
	305	#define set_iopl_mask(mask) (paravirt_ops.set_iopl_mask(mask))
	306
	307	/* The paravirtualized I/O functions */
	308	static inline void slow_down_io(void) {
	309	paravirt_ops.io_delay();
	310	#ifdef REALLY_SLOW_IO
	311	paravirt_ops.io_delay();
	312	paravirt_ops.io_delay();
	313	paravirt_ops.io_delay();
	314	#endif
	315	}
	316
13623d79 RR	317	#ifdef CONFIG_X86_LOCAL_APIC
	318	/*
	319	* Basic functions accessing APICs.
	320	*/
	321	static inline void apic_write(unsigned long reg, unsigned long v)
	322	{
	323	paravirt_ops.apic_write(reg,v);
	324	}
	325
	326	static inline void apic_write_atomic(unsigned long reg, unsigned long v)
	327	{
	328	paravirt_ops.apic_write_atomic(reg,v);
	329	}
	330
	331	static inline unsigned long apic_read(unsigned long reg)
	332	{
	333	return paravirt_ops.apic_read(reg);
	334	}
bbab4f3b ZA	335
	336	static inline void setup_boot_clock(void)
	337	{
	338	paravirt_ops.setup_boot_clock();
	339	}
	340
	341	static inline void setup_secondary_clock(void)
	342	{
	343	paravirt_ops.setup_secondary_clock();
	344	}
13623d79 RR	345	#endif
13623d79 RR	346
ae5da273 ZA	347	#ifdef CONFIG_SMP
	348	static inline void startup_ipi_hook(int phys_apicid, unsigned long start_eip,
	349	unsigned long start_esp)
	350	{
	351	return paravirt_ops.startup_ipi_hook(phys_apicid, start_eip, start_esp);
	352	}
	353	#endif
13623d79	354
da181a8b RR	355	#define __flush_tlb() paravirt_ops.flush_tlb_user()
	356	#define __flush_tlb_global() paravirt_ops.flush_tlb_kernel()
	357	#define __flush_tlb_single(addr) paravirt_ops.flush_tlb_single(addr)
	358
9a1c13e9 ZA	359	#define paravirt_map_pt_hook(type, va, pfn) paravirt_ops.map_pt_hook(type, va, pfn)
9a1c13e9 ZA	360
c119ecce ZA	361	#define paravirt_alloc_pt(pfn) paravirt_ops.alloc_pt(pfn)
	362	#define paravirt_release_pt(pfn) paravirt_ops.release_pt(pfn)
	363
	364	#define paravirt_alloc_pd(pfn) paravirt_ops.alloc_pd(pfn)
	365	#define paravirt_alloc_pd_clone(pfn, clonepfn, start, count) \
	366	paravirt_ops.alloc_pd_clone(pfn, clonepfn, start, count)
	367	#define paravirt_release_pd(pfn) paravirt_ops.release_pd(pfn)
	368
da181a8b RR	369	static inline void set_pte(pte_t *ptep, pte_t pteval)
	370	{
	371	paravirt_ops.set_pte(ptep, pteval);
	372	}
	373
	374	static inline void set_pte_at(struct mm_struct mm, u32 addr, pte_t ptep, pte_t pteval)
	375	{
	376	paravirt_ops.set_pte_at(mm, addr, ptep, pteval);
	377	}
	378
	379	static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
	380	{
	381	paravirt_ops.set_pmd(pmdp, pmdval);
	382	}
	383
	384	static inline void pte_update(struct mm_struct mm, u32 addr, pte_t ptep)
	385	{
	386	paravirt_ops.pte_update(mm, addr, ptep);
	387	}
	388
	389	static inline void pte_update_defer(struct mm_struct mm, u32 addr, pte_t ptep)
	390	{
	391	paravirt_ops.pte_update_defer(mm, addr, ptep);
	392	}
	393
	394	#ifdef CONFIG_X86_PAE
	395	static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
	396	{
	397	paravirt_ops.set_pte_atomic(ptep, pteval);
	398	}
	399
	400	static inline void set_pte_present(struct mm_struct mm, unsigned long addr, pte_t ptep, pte_t pte)
	401	{
	402	paravirt_ops.set_pte_present(mm, addr, ptep, pte);
	403	}
	404
	405	static inline void set_pud(pud_t *pudp, pud_t pudval)
	406	{
	407	paravirt_ops.set_pud(pudp, pudval);
	408	}
	409
	410	static inline void pte_clear(struct mm_struct mm, unsigned long addr, pte_t ptep)
	411	{
	412	paravirt_ops.pte_clear(mm, addr, ptep);
	413	}
	414
	415	static inline void pmd_clear(pmd_t *pmdp)
	416	{
	417	paravirt_ops.pmd_clear(pmdp);
	418	}
	419	#endif
	420
9226d125 ZA	421	/* Lazy mode for batching updates / context switch */
	422	#define PARAVIRT_LAZY_NONE 0
	423	#define PARAVIRT_LAZY_MMU 1
	424	#define PARAVIRT_LAZY_CPU 2
49f19710	425	#define PARAVIRT_LAZY_FLUSH 3
9226d125 ZA	426
	427	#define __HAVE_ARCH_ENTER_LAZY_CPU_MODE
	428	#define arch_enter_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_CPU)
	429	#define arch_leave_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE)
49f19710	430	#define arch_flush_lazy_cpu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_FLUSH)
9226d125 ZA	431
	432	#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
	433	#define arch_enter_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_MMU)
	434	#define arch_leave_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_NONE)
49f19710	435	#define arch_flush_lazy_mmu_mode() paravirt_ops.set_lazy_mode(PARAVIRT_LAZY_FLUSH)
9226d125	436
139ec7c4 RR	437	/* These all sit in the .parainstructions section to tell us what to patch. */
	438	struct paravirt_patch {
	439	u8 instr; / original instructions */
	440	u8 instrtype; /* type of this instruction */
	441	u8 len; /* length of original instruction */
	442	u16 clobbers; /* what registers you may clobber */
	443	};
	444
	445	#define paravirt_alt(insn_string, typenum, clobber) \
	446	"771:\n\t" insn_string "\n" "772:\n" \
	447	".pushsection .parainstructions,\"a\"\n" \
	448	" .long 771b\n" \
	449	" .byte " __stringify(typenum) "\n" \
	450	" .byte 772b-771b\n" \
	451	" .short " __stringify(clobber) "\n" \
	452	".popsection"
	453
	454	static inline unsigned long __raw_local_save_flags(void)
	455	{
	456	unsigned long f;
	457
	458	__asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
	459	"call *%1;"
	460	"popl %%edx; popl %%ecx",
	461	PARAVIRT_SAVE_FLAGS, CLBR_NONE)
	462	: "=a"(f): "m"(paravirt_ops.save_fl)
	463	: "memory", "cc");
	464	return f;
	465	}
	466
	467	static inline void raw_local_irq_restore(unsigned long f)
	468	{
	469	__asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
	470	"call *%1;"
	471	"popl %%edx; popl %%ecx",
	472	PARAVIRT_RESTORE_FLAGS, CLBR_EAX)
	473	: "=a"(f) : "m" (paravirt_ops.restore_fl), "0"(f)
	474	: "memory", "cc");
	475	}
	476
	477	static inline void raw_local_irq_disable(void)
	478	{
	479	__asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
	480	"call *%0;"
	481	"popl %%edx; popl %%ecx",
	482	PARAVIRT_IRQ_DISABLE, CLBR_EAX)
	483	: : "m" (paravirt_ops.irq_disable)
	484	: "memory", "eax", "cc");
	485	}
	486
	487	static inline void raw_local_irq_enable(void)
	488	{
	489	__asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
	490	"call *%0;"
	491	"popl %%edx; popl %%ecx",
	492	PARAVIRT_IRQ_ENABLE, CLBR_EAX)
	493	: : "m" (paravirt_ops.irq_enable)
	494	: "memory", "eax", "cc");
	495	}
	496
	497	static inline unsigned long __raw_local_irq_save(void)
	498	{
	499	unsigned long f;
	500
501	__asm__ __volatile__(paravirt_alt( "pushl %%ecx; pushl %%edx;"
502	"call *%1; pushl %%eax;"
503	"call *%2; popl %%eax;"
504	"popl %%edx; popl %%ecx",
505	PARAVIRT_SAVE_FLAGS_IRQ_DISABLE,
506	CLBR_NONE)
507	: "=a"(f)
508	: "m" (paravirt_ops.save_fl),
509	"m" (paravirt_ops.irq_disable)
510	: "memory", "cc");
511	return f;
512	}
513
514	#define CLI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;" \
515	"call *paravirt_ops+%c[irq_disable];" \
516	"popl %%edx; popl %%ecx", \
517	PARAVIRT_IRQ_DISABLE, CLBR_EAX)
518
519	#define STI_STRING paravirt_alt("pushl %%ecx; pushl %%edx;" \
520	"call *paravirt_ops+%c[irq_enable];" \
521	"popl %%edx; popl %%ecx", \
522	PARAVIRT_IRQ_ENABLE, CLBR_EAX)
523	#define CLI_STI_CLOBBERS , "%eax"
524	#define CLI_STI_INPUT_ARGS \
525	, \
526	[irq_disable] "i" (offsetof(struct paravirt_ops, irq_disable)), \
527	[irq_enable] "i" (offsetof(struct paravirt_ops, irq_enable))
528
d3561b7f RR	529	#else /* __ASSEMBLY__ */
d3561b7f RR	530
139ec7c4 RR	531	#define PARA_PATCH(ptype, clobbers, ops) \
	532	771:; \
	533	ops; \
	534	772:; \
	535	.pushsection .parainstructions,"a"; \
	536	.long 771b; \
	537	.byte ptype; \
	538	.byte 772b-771b; \
	539	.short clobbers; \
	540	.popsection
	541
	542	#define INTERRUPT_RETURN \
	543	PARA_PATCH(PARAVIRT_INTERRUPT_RETURN, CLBR_ANY, \
	544	jmp *%cs:paravirt_ops+PARAVIRT_iret)
	545
	546	#define DISABLE_INTERRUPTS(clobbers) \
	547	PARA_PATCH(PARAVIRT_IRQ_DISABLE, clobbers, \
	548	pushl %ecx; pushl %edx; \
	549	call *paravirt_ops+PARAVIRT_irq_disable; \
	550	popl %edx; popl %ecx) \
	551
	552	#define ENABLE_INTERRUPTS(clobbers) \
	553	PARA_PATCH(PARAVIRT_IRQ_ENABLE, clobbers, \
	554	pushl %ecx; pushl %edx; \
	555	call *%cs:paravirt_ops+PARAVIRT_irq_enable; \
	556	popl %edx; popl %ecx)
	557
	558	#define ENABLE_INTERRUPTS_SYSEXIT \
	559	PARA_PATCH(PARAVIRT_STI_SYSEXIT, CLBR_ANY, \
	560	jmp *%cs:paravirt_ops+PARAVIRT_irq_enable_sysexit)
	561
	562	#define GET_CR0_INTO_EAX \
	563	call *paravirt_ops+PARAVIRT_read_cr0
	564
d3561b7f RR	565	#endif /* __ASSEMBLY__ */
	566	#endif /* CONFIG_PARAVIRT */
	567	#endif /* __ASM_PARAVIRT_H */