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s390/kvm_stat: correct sys_perf_event_open syscall number

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Correct sys_perf_event_open syscall number for s390 architecture
   - the hardcoded syscall number 298 is for x86 but should
     be different for other architectures.
     In case we figure out via /proc/cpuinfo that we are running
     on s390 the appropriate syscall number is used from map
     syscall_numbers; other architectures can extend this.

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinz Graalfs 2012-10-29 02:13:20 +00:00 committed by Alexander Graf
parent 235a3f0bed
commit 1b3e6f88dc
1 changed files with 9 additions and 2 deletions
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11
scripts/kvm/kvm_stat
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@ -170,6 +170,12 @@ vendor_exit_reasons = {
'IBM/S390': s390_exit_reasons,
}
syscall_numbers = {
'IBM/S390': 331,
}
sc_perf_evt_open = 298
exit_reasons = None
for line in file('/proc/cpuinfo').readlines():
@ -177,7 +183,8 @@ for line in file('/proc/cpuinfo').readlines():
for flag in line.split():
if flag in vendor_exit_reasons:
exit_reasons = vendor_exit_reasons[flag]
if flag in syscall_numbers:
sc_perf_evt_open = syscall_numbers[flag]
filters = {
'kvm_exit': ('exit_reason', exit_reasons)
}
@ -206,7 +213,7 @@ class perf_event_attr(ctypes.Structure):
('bp_len', ctypes.c_uint64),
]
def _perf_event_open(attr, pid, cpu, group_fd, flags):
return syscall(298, ctypes.pointer(attr), ctypes.c_int(pid),
return syscall(sc_perf_evt_open, ctypes.pointer(attr), ctypes.c_int(pid),
ctypes.c_int(cpu), ctypes.c_int(group_fd),
ctypes.c_long(flags))