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[5/6] kvm_stat: Abstract ioctl numbers

Message ID 1402991675-24905-5-git-send-email-mpe@ellerman.id.au
State New
Headers show

Commit Message

Michael Ellerman June 17, 2014, 7:54 a.m. UTC 
Unfortunately ioctl numbers are platform specific, so abstract them out
of the code so they can be overridden. As it happens x86 and s390 share
the same values, so nothing needs to change yet.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 scripts/kvm/kvm_stat | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)
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Patch

diff --git a/scripts/kvm/kvm_stat b/scripts/kvm/kvm_stat
index 2468a22..2e0f5ed 100755
--- a/scripts/kvm/kvm_stat
+++ b/scripts/kvm/kvm_stat
@@ -180,6 +180,12 @@  filters = {
     'kvm_userspace_exit': ('reason', generic_exit_reasons)
 }
 
+ioctl_numbers = {
+    'SET_FILTER' : 0x40082406,
+    'ENABLE'     : 0x00002400,
+    'DISABLE'    : 0x00002401,
+}
+
 def x86_init(flag):
     globals().update({
         'sc_perf_evt_open' : 298,
@@ -304,14 +310,14 @@  class Event(object):
             raise Exception('perf_event_open failed')
         if filter:
             import fcntl
-            fcntl.ioctl(fd, 0x40082406, filter)
+            fcntl.ioctl(fd, ioctl_numbers['SET_FILTER'], filter)
         self.fd = fd
     def enable(self):
         import fcntl
-        fcntl.ioctl(self.fd, 0x00002400, 0)
+        fcntl.ioctl(self.fd, ioctl_numbers['ENABLE'], 0)
     def disable(self):
         import fcntl
-        fcntl.ioctl(self.fd, 0x00002401, 0)
+        fcntl.ioctl(self.fd, ioctl_numbers['DISABLE'], 0)
 
 class TracepointProvider(object):
     def __init__(self):