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cpu-data.py: Filter out apic current logical processor

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Commit 10b5e789c5 attempts to filter out the logical processor id
in the generated data to remove noise and irrelevant changes in the
output.

cpuid-leaf 0x0B may have more than two sub-leaves though. Filter out
logical processor id from all sub-leaves of 0x0B and 0x1F (superset
of the information in 0x0B).

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Tim Wiederhake 2023-03-28 16:14:55 +02:00
parent 17e92b4305
commit 1716ec3d36
1 changed files with 10 additions and 7 deletions
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17
tests/cputestdata/cpu-data.py
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@ -107,11 +107,14 @@ def gather_cpuid_leaves_kcpuid(output):
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
if eax_in != regs["eax_in"]:
return
if ecx_in != regs["ecx_in"] and ecx_in is not None:
return
regs["eax"] &= eax_mask
regs["ebx"] &= ebx_mask
regs["ecx"] &= ecx_mask
regs["edx"] &= edx_mask
cpuid = args.path_to_cpuid or "cpuid"
try:
@ -132,8 +135,8 @@ def gather_cpuid_leaves(args):
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)
mask(regs, 0x0b, 0x01, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffff00)
mask(regs, 0x0b, None, 0xffffffff, 0xffffffff, 0xffffffff, 0x00000000)
mask(regs, 0x1f, None, 0xffffffff, 0xffffffff, 0xffffffff, 0x00000000)
yield regs