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x86: tweak io_64.h for paravirt. 

We need something here because we can't call in and out instructions
directly. However, we have to be careful, because no indirections are
allowed in misc_64.c , and paravirt_ops is a kind of one. So just
call it directly there

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Glauber de Oliveira Costa 2008-01-30 13:31:10 +01:00 committed by Ingo Molnar
parent ee238e5ca6
commit ba082427ae
2 changed files with 29 additions and 7 deletions
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6
arch/x86/boot/compressed/misc_64.c
View File

@ -9,6 +9,12 @@
* High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
*/
/*
* we have to be careful, because no indirections are allowed here, and
* paravirt_ops is a kind of one. As it will only run in baremetal anyway,
* we just keep it from happening
*/
#undef CONFIG_PARAVIRT
#define _LINUX_STRING_H_ 1
#define __LINUX_BITMAP_H 1

30
include/asm-x86/io_64.h
View File

@ -40,6 +40,10 @@ extern void native_io_delay(void);
extern int io_delay_type;
extern void io_delay_init(void);
#if defined(CONFIG_PARAVIRT)
#include <asm/paravirt.h>
#else
static inline void slow_down_io(void)
{
native_io_delay();
@ -49,6 +53,7 @@ static inline void slow_down_io(void)
native_io_delay();
#endif
}
#endif
/*
* Talk about misusing macros..
@ -57,21 +62,32 @@ static inline void slow_down_io(void)
static inline void out##s(unsigned x value, unsigned short port) {
#define __OUT2(s,s1,s2) \
__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1" : : "a" (value), "Nd" (port))
__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1"
#ifndef REALLY_SLOW_IO
#define REALLY_SLOW_IO
#define UNSET_REALLY_SLOW_IO
#endif
#define __OUT(s,s1,x) \
__OUT1(s,x) __OUT2(s,s1,"w"); } \
__OUT1(s##_p,x) __OUT2(s,s1,"w"); slow_down_io(); }
__OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \
__OUT1(s##_p, x) __OUT2(s, s1, "w") : : "a" (value), "Nd" (port)); \
slow_down_io(); }
#define __IN1(s) \
static inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v;
#define __IN2(s,s1,s2) \
__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0" : "=a" (_v) : "Nd" (port))
__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0"
#define __IN(s,s1) \
__IN1(s) __IN2(s,s1,"w"); return _v; } \
__IN1(s##_p) __IN2(s,s1,"w"); slow_down_io(); return _v; }
#define __IN(s,s1,i...) \
__IN1(s) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); return _v; } \
__IN1(s##_p) __IN2(s, s1, "w") : "=a" (_v) : "Nd" (port), ##i); \
slow_down_io(); return _v; }
#ifdef UNSET_REALLY_SLOW_IO
#undef REALLY_SLOW_IO
#endif
#define __INS(s) \
static inline void ins##s(unsigned short port, void * addr, unsigned long count) \