External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2025-03-07 17:28:15 +00:00
Code

cpu-gather: Prepare gather_msr for reading multiple msr

Browse Source 
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Tim Wiederhake 2020-12-15 17:25:14 +01:00 committed by Michal Privoznik
parent 4b9720e89f
commit 942cf935d6
1 changed files with 14 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
tests/cputestdata/cpu-gather.py
View File

@ -58,24 +58,29 @@ def gather_cpuid_leaves(args):
def gather_msr(): def gather_msr():
IA32_ARCH_CAPABILITIES_MSR = 0x10a msrs = dict()
addresses = [
0x10a, # IA32_ARCH_CAPABILITIES_MSR
]
KVM_GET_MSRS = 0xc008ae88 KVM_GET_MSRS = 0xc008ae88
try: try:
with open("/dev/cpu/0/msr", "rb") as f: with open("/dev/cpu/0/msr", "rb") as f:
f.seek(IA32_ARCH_CAPABILITIES_MSR) for addr in addresses:
f.seek(addr)
buf = f.read(8) buf = f.read(8)
msr = struct.unpack("=Q", buf)[0] msrs[addr] = struct.unpack("=Q", buf)[0]
return "", {IA32_ARCH_CAPABILITIES_MSR: msr} return "", msrs
except IOError as e: except IOError as e:
print("Warning: {}".format(e), file=sys.stderr) print("Warning: {}".format(e), file=sys.stderr)
try: try:
bufIn = struct.pack("=LLLLQ", 1, 0, IA32_ARCH_CAPABILITIES_MSR, 0, 0)
with open("/dev/kvm", "rb") as f: with open("/dev/kvm", "rb") as f:
for addr in addresses:
bufIn = struct.pack("=LLLLQ", 1, 0, addr, 0, 0)
bufOut = fcntl.ioctl(f, KVM_GET_MSRS, bufIn) bufOut = fcntl.ioctl(f, KVM_GET_MSRS, bufIn)
msr = struct.unpack("=LLLLQ", bufOut)[4] msrs[addr] = struct.unpack("=LLLLQ", bufOut)[4]
return " via KVM", {IA32_ARCH_CAPABILITIES_MSR: msr} return " via KVM", msrs
except IOError as e: except IOError as e:
print("Warning: {}".format(e), file=sys.stderr) print("Warning: {}".format(e), file=sys.stderr)