Commit f505a4d7 authored by Jan Kiszka's avatar Jan Kiszka Committed by Marcelo Tosatti
Browse files

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: default avatarJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
parent 1773d9ee

scripts/kvm/vmxcap

+2 −2
Original line number Diff line number Diff line
@@ -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)