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acrn-config: Fix target xml generation issue when no P-state scaling driver is present

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There seems to be a corner case where target xml file
fails to get generated if there was no P-state scaling driver
or C-state idle driver present. This patch addresses it by
handling the file not present exception and setting a warning
as well a "not available" string to successfully generate
target xml file.

Signed-off-by: Vijay Dhanraj <vijay.dhanraj@intel.com>
Tracked-On: #4199
Acked-by: Victor Sun <victor.sun@intel.com>
This commit is contained in:
Vijay Dhanraj 2019-12-05 17:34:15 -08:00 committed by wenlingz
parent 8c87ee3951
commit f3688c7e45
1 changed files with 35 additions and 24 deletions
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59
misc/acrn-config/target/acpi.py
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@ -417,19 +417,24 @@ def store_cx_data(sysnode1, sysnode2, config):
"""
i = 0
state_cpus = {}
with open(sysnode1, 'r') as acpi_idle:
idle_driver = acpi_idle.read(32)
try:
with open(sysnode1, 'r') as acpi_idle:
idle_driver = acpi_idle.read(32)
if idle_driver.find("acpi_idle") == -1:
parser_lib.print_yel("The Cx data for ACRN relies on " +\
"acpi_idle driver but it is not found, ", warn=True, end=False)
if idle_driver.find("intel_idle") == 0:
print("please add idle=nomwait in kernel " +\
"cmdline to fall back to acpi_idle driver")
else:
parser_lib.print_yel("please make sure ACPI Cstate is enabled in BIOS.", warn=True)
print("\t/* Cx data is not available */", file=config)
return
if idle_driver.find("acpi_idle") == -1:
parser_lib.print_yel("The Cx data for ACRN relies on " +\
"acpi_idle driver but it is not found, ", warn=True, end=False)
if idle_driver.find("intel_idle") == 0:
print("please add idle=nomwait in kernel " +\
"cmdline to fall back to acpi_idle driver")
else:
parser_lib.print_yel("please make sure ACPI Cstate is enabled in BIOS.", warn=True)
print("\t/* Cx data is not available */", file=config)
return
except IOError:
parser_lib.print_yel("No idle driver found.", warn=True)
print("\t/* Cx data is not available */", file=config)
return
files = os.listdir(sysnode2)
for d_path in files:
@ -486,18 +491,24 @@ def store_px_data(sysnode, config):
"""
px_tmp = PxPkg()
px_data = {}
with open(sysnode+'cpu0/cpufreq/scaling_driver', 'r') as f_node:
freq_driver = f_node.read()
if freq_driver.find("acpi-cpufreq") == -1:
parser_lib.print_yel("The Px data for ACRN relies on " +\
"acpi-cpufreq driver but it is not found, ", warn=True, end=False)
if freq_driver.find("intel_pstate") == 0:
print("please add intel_pstate=disable in kernel " +\
"cmdline to fall back to acpi-cpufreq driver")
else:
parser_lib.print_yel("please make sure ACPI Pstate is enabled in BIOS.", warn=True)
print("\t/* Px data is not available */", file=config)
return
try:
with open(sysnode+'cpu0/cpufreq/scaling_driver', 'r') as f_node:
freq_driver = f_node.read()
if freq_driver.find("acpi-cpufreq") == -1:
parser_lib.print_yel("The Px data for ACRN relies on " +\
"acpi-cpufreq driver but it is not found, ", warn=True, end=False)
if freq_driver.find("intel_pstate") == 0:
print("please add intel_pstate=disable in kernel " +\
"cmdline to fall back to acpi-cpufreq driver")
else:
parser_lib.print_yel("please make sure ACPI Pstate is enabled in BIOS.", warn=True)
print("\t/* Px data is not available */", file=config)
return
except IOError:
parser_lib.print_yel("No scaling_driver found.", warn=True)
print("\t/* Px data is not available */", file=config)
return
try:
with open(sysnode+'cpufreq/boost', 'r') as f_node: