[Xen-changelog] Add get_cycles(), to be defined in asm/time.h, as a

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID f1b6dd997716d28ea40d201450c1d29c80eb58fc
# Parent  6be0d21bb8638e63db97588324ffe4f3d3a24e8c
Add get_cycles(), to be defined in asm/time.h, as a
generic method to access cpu-specific local cycle counter.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>

diff -r 6be0d21bb863 -r f1b6dd997716 xen/common/trace.c
--- a/xen/common/trace.c        Mon Oct 31 16:14:59 2005
+++ b/xen/common/trace.c        Tue Nov  1 09:28:41 2005
@@ -260,7 +260,7 @@
     }
 
     rec = &t_recs[smp_processor_id()][buf->prod % nr_recs];
-    rdtscll(rec->cycles);
+    rec->cycles  = (u64)get_cycles();
     rec->event   = event;
     rec->data[0] = d1;
     rec->data[1] = d2;
diff -r 6be0d21bb863 -r f1b6dd997716 xen/include/asm-x86/time.h
--- a/xen/include/asm-x86/time.h        Mon Oct 31 16:14:59 2005
+++ b/xen/include/asm-x86/time.h        Tue Nov  1 09:28:41 2005
@@ -1,6 +1,8 @@
 
 #ifndef __X86_TIME_H__
 #define __X86_TIME_H__
+
+#include <asm/msr.h>
 
 extern int timer_ack;
 
@@ -10,4 +12,13 @@
 struct domain;
 extern void init_domain_time(struct domain *d);
 
+typedef u64 cycles_t;
+
+static inline cycles_t get_cycles(void)
+{
+    cycles_t c;
+    rdtscll(c);
+    return c;
+}
+
 #endif /* __X86_TIME_H__ */

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