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paravirt.h 28.2 KiB
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static inline unsigned long __raw_local_irq_save(void)
{
	unsigned long f;

#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]")
	[paravirt_cli_type] "i" (PARAVIRT_PATCH(irq_disable)),		\
	[paravirt_sti_type] "i" (PARAVIRT_PATCH(irq_enable)),		\
	paravirt_clobber(CLBR_EAX)

#undef PARAVIRT_CALL
#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
#define PARA_PATCH(off)	((off) / 4)

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

	PARA_SITE(PARA_PATCH(PARAVIRT_iret), CLBR_NONE,		\
		  jmp *%cs:paravirt_ops+PARAVIRT_iret)

#define DISABLE_INTERRUPTS(clobbers)					\
	PARA_SITE(PARA_PATCH(PARAVIRT_irq_disable), clobbers,		\

#define ENABLE_INTERRUPTS(clobbers)					\
	PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable), clobbers,		\
	PARA_SITE(PARA_PATCH(PARAVIRT_irq_enable_sysexit), CLBR_NONE,	\
	push %ecx; push %edx;			\
	call *paravirt_ops+PARAVIRT_read_cr0;	\
	pop %edx; pop %ecx
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_PARAVIRT */
#endif	/* __ASM_PARAVIRT_H */