SConstruct (10710:9b71309d29f9) SConstruct (10841:38af38f1f307)
1# -*- mode:python -*-
2
1# -*- mode:python -*-
2
3# Copyright (c) 2013 ARM Limited
3# Copyright (c) 2013, 2015 ARM Limited
4# All rights reserved.
5#
6# The license below extends only to copyright in the software and shall
7# not be construed as granting a license to any other intellectual
8# property including but not limited to intellectual property relating
9# to a hardware implementation of the functionality of the software
10# licensed hereunder. You may use the software subject to the license
11# terms below provided that you ensure that this notice is replicated

--- 1005 unchanged lines hidden (view full) ---

1017if not have_fenv:
1018 print "Warning: Header file <fenv.h> not found."
1019 print " This host has no IEEE FP rounding mode control."
1020
1021# Check if we should enable KVM-based hardware virtualization. The API
1022# we rely on exists since version 2.6.36 of the kernel, but somehow
1023# the KVM_API_VERSION does not reflect the change. We test for one of
1024# the types as a fall back.
4# All rights reserved.
5#
6# The license below extends only to copyright in the software and shall
7# not be construed as granting a license to any other intellectual
8# property including but not limited to intellectual property relating
9# to a hardware implementation of the functionality of the software
10# licensed hereunder. You may use the software subject to the license
11# terms below provided that you ensure that this notice is replicated

--- 1005 unchanged lines hidden (view full) ---

1017if not have_fenv:
1018 print "Warning: Header file <fenv.h> not found."
1019 print " This host has no IEEE FP rounding mode control."
1020
1021# Check if we should enable KVM-based hardware virtualization. The API
1022# we rely on exists since version 2.6.36 of the kernel, but somehow
1023# the KVM_API_VERSION does not reflect the change. We test for one of
1024# the types as a fall back.
1025have_kvm = conf.CheckHeader('linux/kvm.h', '<>') and \
1026 conf.CheckTypeSize('struct kvm_xsave', '#include <linux/kvm.h>') != 0
1025have_kvm = conf.CheckHeader('linux/kvm.h', '<>')
1027if not have_kvm:
1028 print "Info: Compatible header file <linux/kvm.h> not found, " \
1029 "disabling KVM support."
1030
1026if not have_kvm:
1027 print "Info: Compatible header file <linux/kvm.h> not found, " \
1028 "disabling KVM support."
1029
1030# x86 needs support for xsave. We test for the structure here since we
1031# won't be able to run new tests by the time we know which ISA we're
1032# targeting.
1033have_kvm_xsave = conf.CheckTypeSize('struct kvm_xsave',
1034 '#include <linux/kvm.h>') != 0
1035
1031# Check if the requested target ISA is compatible with the host
1032def is_isa_kvm_compatible(isa):
1036# Check if the requested target ISA is compatible with the host
1037def is_isa_kvm_compatible(isa):
1033 isa_comp_table = {
1034 "arm" : ( "armv7l" ),
1035 "x86" : ( "x86_64" ),
1036 }
1037 try:
1038 import platform
1039 host_isa = platform.machine()
1040 except:
1041 print "Warning: Failed to determine host ISA."
1042 return False
1043
1038 try:
1039 import platform
1040 host_isa = platform.machine()
1041 except:
1042 print "Warning: Failed to determine host ISA."
1043 return False
1044
1044 return host_isa in isa_comp_table.get(isa, [])
1045 if not have_posix_timers:
1046 print "Warning: Can not enable KVM, host seems to lack support " \
1047 "for POSIX timers"
1048 return False
1045
1049
1050 if isa == "arm":
1051 return host_isa == "armv7l"
1052 elif isa == "x86":
1053 if host_isa != "x86_64":
1054 return False
1046
1055
1056 if not have_kvm_xsave:
1057 print "KVM on x86 requires xsave support in kernel headers."
1058 return False
1059
1060 return True
1061 else:
1062 return False
1063
1064
1047# Check if the exclude_host attribute is available. We want this to
1048# get accurate instruction counts in KVM.
1049main['HAVE_PERF_ATTR_EXCLUDE_HOST'] = conf.CheckMember(
1050 'linux/perf_event.h', 'struct perf_event_attr', 'exclude_host')
1051
1052
1053######################################################################
1054#

--- 297 unchanged lines hidden (view full) ---

1352
1353 if env['EFENCE']:
1354 env.Append(LIBS=['efence'])
1355
1356 if env['USE_KVM']:
1357 if not have_kvm:
1358 print "Warning: Can not enable KVM, host seems to lack KVM support"
1359 env['USE_KVM'] = False
1065# Check if the exclude_host attribute is available. We want this to
1066# get accurate instruction counts in KVM.
1067main['HAVE_PERF_ATTR_EXCLUDE_HOST'] = conf.CheckMember(
1068 'linux/perf_event.h', 'struct perf_event_attr', 'exclude_host')
1069
1070
1071######################################################################
1072#

--- 297 unchanged lines hidden (view full) ---

1370
1371 if env['EFENCE']:
1372 env.Append(LIBS=['efence'])
1373
1374 if env['USE_KVM']:
1375 if not have_kvm:
1376 print "Warning: Can not enable KVM, host seems to lack KVM support"
1377 env['USE_KVM'] = False
1360 elif not have_posix_timers:
1361 print "Warning: Can not enable KVM, host seems to lack support " \
1362 "for POSIX timers"
1363 env['USE_KVM'] = False
1364 elif not is_isa_kvm_compatible(env['TARGET_ISA']):
1365 print "Info: KVM support disabled due to unsupported host and " \
1366 "target ISA combination"
1367 env['USE_KVM'] = False
1368
1369 # Warn about missing optional functionality
1370 if env['USE_KVM']:
1371 if not main['HAVE_PERF_ATTR_EXCLUDE_HOST']:

--- 45 unchanged lines hidden --- 		1378 elif not is_isa_kvm_compatible(env['TARGET_ISA']):
1379 print "Info: KVM support disabled due to unsupported host and " \
1380 "target ISA combination"
1381 env['USE_KVM'] = False
1382
1383 # Warn about missing optional functionality
1384 if env['USE_KVM']:
1385 if not main['HAVE_PERF_ATTR_EXCLUDE_HOST']:

--- 45 unchanged lines hidden ---