From: Jan Kiszka <jan.kiszka@siemens.com>
Date: Wed, 13 Feb 2013 11:43:10 +0000 (+0100)
Subject: vmxcap: Open MSR file in unbuffered mode
X-Git-Tag: Tizen_Studio_1.3_Release_p2.3.1~900^2~59^2~320^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f505a4d74aae6fc8bb5502a6038b5f671aa97713;p=sdk%2Femulator%2Fqemu.git

vmxcap: Open MSR file in unbuffered mode

Python may otherwise decide to to read larger chunks, applying the seek
only on the software buffer. This will return results from the wrong
MSRs.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
---

diff --git a/scripts/kvm/vmxcap b/scripts/kvm/vmxcap
index 0b23f7795a..6363e7368f 100755
--- a/scripts/kvm/vmxcap
+++ b/scripts/kvm/vmxcap
@@ -27,9 +27,9 @@ MSR_IA32_VMX_VMFUNC = 0x491
 class msr(object):
     def __init__(self):
         try:
-            self.f = file('/dev/cpu/0/msr')
+            self.f = open('/dev/cpu/0/msr', 'r', 0)
         except:
-            self.f = file('/dev/msr0')
+            self.f = open('/dev/msr0', 'r', 0)
     def read(self, index, default = None):
         import struct
         self.f.seek(index)