mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-26 00:41:08 +00:00
17 lines
603 B
Diff
17 lines
603 B
Diff
|
diff --git a/src/arch/i386/include/ipxe/rdtsc_timer.h b/src/arch/i386/include/ipxe/rdtsc_timer.h
|
||
|
|
index 472e140..d5095a7 100644
|
||
|
|
--- a/src/arch/i386/include/ipxe/rdtsc_timer.h
|
||
|
|
+++ b/src/arch/i386/include/ipxe/rdtsc_timer.h
|
||
|
|
@@ -30,7 +30,10 @@ static inline __always_inline unsigned long
|
||
|
|
TIMER_INLINE ( rdtsc, currticks ) ( void ) {
|
||
|
|
unsigned long ticks;
|
||
|
|
|
||
|
|
- __asm__ __volatile__ ( "rdtsc\n\t"
|
||
|
|
+ __asm__ __volatile__ (
|
||
|
|
+ "mfence\n\t"
|
||
|
|
+ "rdtsc\n\t"
|
||
|
|
+ "mfence\n\t"
|
||
|
|
"shrdl %1, %%edx, %%eax\n\t"
|
||
|
|
: "=a" ( ticks ) : "i" ( TSC_SHIFT ) : "edx" );
|
||
|
|
return ticks;
|