oeqa: Fix for QEMU_USE_KVM

Fixed:
MACHINE = "qemux86"
QEMU_USE_KVM = "qemux86"
IMAGE_CLASSES += "testimage"

$ oe-selftest -r runqemu.RunqemuTests.test_boot_rootfs

[snip]
  File "/buildarea1/lyang1/poky/meta/lib/oe/types.py", line 122, in boolean
    raise ValueError("Invalid boolean value '%s'" % value)
ValueError: Invalid boolean value 'qemux86'

Now QEMU_USE_KVM can only be boolean, can not contain MACHINE any more, kvm
will be enabled if target_arch == build_arch or both of them are x86 archs.

(From OE-Core rev: 7c1a8a624cad8d967635c6cb5f99cf655bde3d44)

(From OE-Core rev: 2c12e1d9c262fb7e5fe02ae2d092789d6536413f)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/testimage.bbclass

@@ -248,13 +248,7 @@ def testimage_main(d):
     boottime = int(d.getVar("TEST_QEMUBOOT_TIMEOUT"))
 
     # Get use_kvm
-    qemu_use_kvm = d.getVar("QEMU_USE_KVM")
+    kvm = oe.types.qemu_use_kvm(d.getVar('QEMU_USE_KVM'), d.getVar('TARGET_ARCH'))
-    if qemu_use_kvm and \
-       (d.getVar('MACHINE') in qemu_use_kvm.split() or \
-        oe.types.boolean(qemu_use_kvm) and 'x86' in machine):
-        kvm = True
-    else:
-        kvm = False
 
     # TODO: We use the current implementatin of qemu runner because of
     # time constrains, qemu runner really needs a refactor too.

meta/lib/oe/types.py

@@ -156,3 +156,27 @@ def path(value, relativeto='', normalize='true', mustexist='false'):
                 raise ValueError("{0}: {1}".format(value, os.strerror(errno.ENOENT)))
 
     return value
+
+def is_x86(arch):
+    """
+    Check whether arch is x86 or x86_64
+    """
+    if arch.startswith('x86_') or re.match('i.*86', arch):
+        return True
+    else:
+        return False
+
+def qemu_use_kvm(kvm, target_arch):
+    """
+    Enable kvm if target_arch == build_arch or both of them are x86 archs.
+    """
+
+    use_kvm = False
+    if kvm and boolean(kvm):
+        build_arch = os.uname()[4]
+        if is_x86(build_arch) and is_x86(target_arch):
+            use_kvm = True
+        elif build_arch == target_arch:
+            use_kvm = True
+    return use_kvm
+

meta/lib/oeqa/targetcontrol.py

@@ -107,13 +107,7 @@ class QemuTarget(BaseTarget):
         dump_target_cmds = d.getVar("testimage_dump_target")
         dump_host_cmds = d.getVar("testimage_dump_host")
         dump_dir = d.getVar("TESTIMAGE_DUMP_DIR")
-        qemu_use_kvm = d.getVar("QEMU_USE_KVM")
+        use_kvm = oe.types.qemu_use_kvm(d.getVar('QEMU_USE_KVM'), d.getVar('TARGET_ARCH'))
-        if qemu_use_kvm and \
-           (oe.types.boolean(qemu_use_kvm) and "x86" in d.getVar("MACHINE") or \
-            d.getVar("MACHINE") in qemu_use_kvm.split()):
-            use_kvm = True
-        else:
-            use_kvm = False
 
         # Log QemuRunner log output to a file
         import oe.path