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From: Jason Wang <jasowang@redhat.com>
To: mtosatti@redhat.com, avi@redhat.com, kvm@vger.kernel.org
Cc: glommer@redhat.com
Subject: [PATCH kvm-unit-test 1/6] Introduce memory barriers.
Date: Fri, 27 Aug 2010 13:49:11 +0800	[thread overview]
Message-ID: <20100827054911.7409.1538.stgit@FreeLancer> (raw)
In-Reply-To: <20100827054733.7409.63882.stgit@FreeLancer>

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 lib/x86/smp.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/lib/x86/smp.h b/lib/x86/smp.h
index c2e7350..df5fdba 100644
--- a/lib/x86/smp.h
+++ b/lib/x86/smp.h
@@ -1,6 +1,10 @@
 #ifndef __SMP_H
 #define __SMP_H
 
+#define mb() 	asm volatile("mfence":::"memory")
+#define rmb()	asm volatile("lfence":::"memory")
+#define wmb()	asm volatile("sfence" ::: "memory")
+
 struct spinlock {
     int v;
 };


  reply	other threads:[~2010-08-27  5:49 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-08-27  5:49 [PATCH kvm-unit-test 0/6] Kvmclock test Jason Wang
2010-08-27  5:49 ` Jason Wang [this message]
2010-08-27  5:49 ` [PATCH kvm-unit-test 2/6] Introduce atomic operations Jason Wang
2010-08-27 11:39   ` Glauber Costa
2010-08-29  9:39     ` Avi Kivity
2010-08-27  5:49 ` [PATCH kvm-unit-test 3/6] Export tsc related helpers Jason Wang
2010-08-27  5:49 ` [PATCH kvm-unit-test 4/6] Introduce atol() Jason Wang
2010-08-27  5:49 ` [PATCH kvm-unit-test 5/6] Add a simple kvmclock driver Jason Wang
2010-08-27 11:31   ` Glauber Costa
2010-08-27  5:49 ` [PATCH kvm-unit-test 6/6] Add a test for kvm-clock Jason Wang
2010-08-27 11:27   ` Glauber Costa
2010-08-30  3:07     ` Jason Wang
2010-08-27 11:34   ` Glauber Costa
2010-08-30  3:27     ` Jason Wang
2010-08-28  1:58   ` Zachary Amsden

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