[PATCH] 6/8 Move sensitive I/O instructions into the sub-arch layer

i386 Transparent paravirtualization subarch patch #6

Move I/O instructions into the sub-arch layer where they can be overridden.

Signed-off-by: Zachary Amsden <[email protected]>
Index: linux-2.6.13/include/asm-i386/io.h
===================================================================
--- linux-2.6.13.orig/include/asm-i386/io.h	2005-06-17 12:48:29.000000000 -0700
+++ linux-2.6.13/include/asm-i386/io.h	2005-08-02 17:14:28.000000000 -0700
@@ -4,6 +4,7 @@
 #include <linux/config.h>
 #include <linux/string.h>
 #include <linux/compiler.h>
+#include <mach_io.h>
 
 /*
  * This file contains the definitions for the x86 IO instructions
@@ -341,11 +342,11 @@
 
 #define BUILDIO(bwl,bw,type) \
 static inline void out##bwl##_local(unsigned type value, int port) { \
-	__asm__ __volatile__("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port)); \
+	__BUILDOUTINST(bwl,bw,value,port); \
 } \
 static inline unsigned type in##bwl##_local(int port) { \
 	unsigned type value; \
-	__asm__ __volatile__("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port)); \
+	__BUILDININST(bwl,bw,value,port); \
 	return value; \
 } \
 static inline void out##bwl##_local_p(unsigned type value, int port) { \
@@ -368,10 +369,10 @@
 	return value; \
 } \
 static inline void outs##bwl(int port, const void *addr, unsigned long count) { \
-	__asm__ __volatile__("rep; outs" #bwl : "+S"(addr), "+c"(count) : "d"(port)); \
+	__BUILDOUTSINST(bwl,addr,count,port); \
 } \
 static inline void ins##bwl(int port, void *addr, unsigned long count) { \
-	__asm__ __volatile__("rep; ins" #bwl : "+D"(addr), "+c"(count) : "d"(port)); \
+	__BUILDINSINST(bwl,addr,count,port); \
 }
 
 BUILDIO(b,b,char)
Index: linux-2.6.13/include/asm-i386/mach-default/mach_io.h
===================================================================
--- linux-2.6.13.orig/include/asm-i386/mach-default/mach_io.h	2005-08-02 17:14:28.000000000 -0700
+++ linux-2.6.13/include/asm-i386/mach-default/mach_io.h	2005-08-02 17:14:28.000000000 -0700
@@ -0,0 +1,16 @@
+#ifndef _MACH_ASM_IO_H
+#define _MACH_ASM_IO_H
+
+#define __BUILDOUTINST(bwl,bw,value,port) \
+	__asm__ __volatile__("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port))
+#define	__BUILDININST(bwl,bw,value,port) \
+	__asm__ __volatile__("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port))
+#define	__BUILDOUTSINST(bwl,addr,count,port) \
+	__asm__ __volatile__("rep; outs" #bwl : "+S"(addr), "+c"(count) : "d"(port))
+#define	__BUILDINSINST(bwl,addr,count,port) \
+	__asm__ __volatile__("rep; ins" #bwl \
+			     : "+D"(addr), "+c"(count) \
+			     : "d"(port) \
+			     : "memory")
+
+#endif

---

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  • Re: [PATCH] 6/8 Move sensitive I/O instructions into the sub-arch layer
    • From: Chris Wright <[email protected]>

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