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cpu-data.py: Factor out cpuid parsing

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Preparation for next patch.

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Tim Wiederhake 2021-04-27 10:25:01 +02:00 committed by Michal Privoznik
parent d2a506eb67
commit 5a175b2ddc
1 changed files with 24 additions and 20 deletions
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44
tests/cputestdata/cpu-data.py
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@ -35,14 +35,7 @@ def gather_name(args):
"Use '--model' to set a model name.")
def gather_cpuid_leaves(args):
def mask(regs, eax_in, ecx_in, eax_mask, ebx_mask, ecx_mask, edx_mask):
if regs["eax_in"] == eax_in and regs["ecx_in"] == ecx_in:
regs["eax"] &= eax_mask
regs["ebx"] &= ebx_mask
regs["ecx"] &= ecx_mask
regs["edx"] &= edx_mask
def gather_cpuid_leaves_cpuid(output):
leave_pattern = re.compile(
"^\\s*"
"(0x[0-9a-f]+)\\s*"
@ -52,6 +45,27 @@ def gather_cpuid_leaves(args):
"ecx=(0x[0-9a-f]+)\\s*"
"edx=(0x[0-9a-f]+)\\s*$")
for line in output.split("\n"):
match = leave_pattern.match(line)
if not match:
continue
yield {
"eax_in": int(match.group(1), 0),
"ecx_in": int(match.group(2), 0),
"eax": int(match.group(3), 0),
"ebx": int(match.group(4), 0),
"ecx": int(match.group(5), 0),
"edx": int(match.group(6), 0)}
def gather_cpuid_leaves(args):
def mask(regs, eax_in, ecx_in, eax_mask, ebx_mask, ecx_mask, edx_mask):
if regs["eax_in"] == eax_in and regs["ecx_in"] == ecx_in:
regs["eax"] &= eax_mask
regs["ebx"] &= ebx_mask
regs["ecx"] &= ecx_mask
regs["edx"] &= edx_mask
cpuid = args.path_to_cpuid or "cpuid"
try:
output = subprocess.check_output(
@ -63,18 +77,8 @@ def gather_cpuid_leaves(args):
"package, you can find the sources or binary packages at "
"'http://www.etallen.com/cpuid.html'.".format(e.filename))
for line in output.split("\n"):
match = leave_pattern.match(line)
if not match:
continue
regs = {
"eax_in": int(match.group(1), 0),
"ecx_in": int(match.group(2), 0),
"eax": int(match.group(3), 0),
"ebx": int(match.group(4), 0),
"ecx": int(match.group(5), 0),
"edx": int(match.group(6), 0)}
reglist = gather_cpuid_leaves_cpuid(output)
for regs in reglist:
# local apic id. Pretend to always run on logical processor #0.
mask(regs, 0x01, 0x00, 0xffffffff, 0x00ffffff, 0xffffffff, 0xffffffff)
mask(regs, 0x0b, 0x00, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffff00)