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[Xen-devel] [PATCH][3/5] x86-64-rdmsrl.patch

from [Arun Sharma]

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To:	Ian Pratt <Ian.Pratt@xxxxxxxxxxxx>, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject:	[Xen-devel] [PATCH][3/5] x86-64-rdmsrl.patch
From:	Arun Sharma <arun.sharma@xxxxxxxxx>
Date:	Tue, 19 Apr 2005 15:06:50 -0700
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   Use the rdmsrl implementation from Linux.
   
   Signed-off-by: Arun Sharma <arun.sharma@xxxxxxxxx>
 
diff -Nru a/xen/include/asm-x86/msr.h b/xen/include/asm-x86/msr.h
--- a/xen/include/asm-x86/msr.h 2005-04-18 16:49:38 -07:00
+++ b/xen/include/asm-x86/msr.h 2005-04-18 16:49:38 -07:00
@@ -6,6 +6,13 @@
                          : "=a" (val1), "=d" (val2) \
                          : "c" (msr))
 
+#define rdmsrl(msr,val) do { unsigned long a__,b__; \
+       __asm__ __volatile__("rdmsr" \
+                           : "=a" (a__), "=d" (b__) \
+                           : "c" (msr)); \
+       val = a__ | (b__<<32); \
+} while(0); 
+
 #define wrmsr(msr,val1,val2) \
      __asm__ __volatile__("wrmsr" \
                          : /* no outputs */ \

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