OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

python/qemu: accel: Strengthen kvm_available() checks

Browse Source 
Currently kvm_available() checks for the presence of kvm module
and, if target and host arches don't mismatch. This patch adds
an 3rd checking: if QEMU binary was compiled with kvm
support.

Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Cleber Rosa <crosa@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20191216191438.93418-4-wainersm@redhat.com>
Signed-off-by: Cleber Rosa <crosa@redhat.com>
This commit is contained in:
Wainer dos Santos Moschetta 2019-12-16 16:14:36 -03:00 committed by Cleber Rosa
parent 1650c3e304
commit 53a049d7d7
1 changed files with 21 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
python/qemu/accel.py
View File

@ -46,9 +46,24 @@ def list_accel(qemu_bin):
# Skip the first line which is the header.
return [acc.strip() for acc in out.splitlines()[1:]]
def kvm_available(target_arch=None):
host_arch = os.uname()[4]
if target_arch and target_arch != host_arch:
if target_arch != ADDITIONAL_ARCHES.get(host_arch):
return False
return os.access("/dev/kvm", os.R_OK | os.W_OK)
def kvm_available(target_arch=None, qemu_bin=None):
"""
Check if KVM is available using the following heuristic:
- Kernel module is present in the host;
- Target and host arches don't mismatch;
- KVM is enabled in the QEMU binary.
@param target_arch (str): target architecture
@param qemu_bin (str): path to the QEMU binary
@return True if kvm is available, otherwise False.
"""
if not os.access("/dev/kvm", os.R_OK | os.W_OK):
return False
if target_arch:
host_arch = os.uname()[4]
if target_arch != host_arch:
if target_arch != ADDITIONAL_ARCHES.get(host_arch):
return False
if qemu_bin and "kvm" not in list_accel(qemu_bin):
return False
return True