[dts] [PATCH] framework: add config option for vfio noiommu mode

[Jianbo Liu]

Hi Marvin,
It's for some arm64 platforms which do not support IOMMU.
And it's also can be a temp solution for the device inside VM without vIOMMU.

Thanks!
Jianbo

On 9 August 2017 at 17:07, Liu, Yong <yong.liu at intel.com> wrote:
> Hi Jianbo,
> I am curious about your environment, what kind of environment you're using and required for NOIMMU mode?
>
> Thanks,
> Marvin
>
>> -----Original Message-----
>> From: dts [mailto:dts-bounces at dpdk.org] On Behalf Of Jianbo Liu
>> Sent: Wednesday, August 09, 2017 2:32 PM
>> To: dts at dpdk.org; herbert.guan at arm.com
>> Cc: Jianbo Liu <jianbo.liu at linaro.org>
>> Subject: [dts] [PATCH] framework: add config option for vfio noiommu mode
>>
>> Signed-off-by: Jianbo Liu <jianbo.liu at linaro.org>
>> ---
>>  framework/dts.py          |  9 +++++++++
>>  framework/project_dpdk.py | 30 +++++++++++++++++++++++++++++-
>>  framework/settings.py     |  1 +
>>  tools/setup.py            |  2 +-
>>  4 files changed, 40 insertions(+), 2 deletions(-)
>>
>> diff --git a/framework/dts.py b/framework/dts.py
>> index c821fc1..931bf38 100644
>> --- a/framework/dts.py
>> +++ b/framework/dts.py
>> @@ -81,6 +81,14 @@ def dts_parse_param(config, section):
>>      parameters = config.get(section, 'parameters').split(':')
>>      drivername = config.get(section, 'drivername').split('=')[-1]
>>
>> +    driver = drivername.split(':')
>> +    if len(driver) == 2:
>> +        drivername = driver[0]
>> +        drivermode = driver[1]
>> +        settings.save_global_setting(settings.HOST_DRIVER_MODE_SETTING,
>> drivermode)
>> +    else:
>> +        drivername = driver[0]
>> +
>>      settings.save_global_setting(settings.HOST_DRIVER_SETTING, drivername)
>>
>>      paramDict = dict()
>> @@ -373,6 +381,7 @@ def dts_run_target(duts, tester, targets, test_suites):
>>      for dutobj in duts:
>>          dutobj.stop_ports()
>>          dutobj.restore_interfaces()
>> +        dutobj.restore_modules()
>>
>>
>>  def dts_run_suite(duts, tester, test_suites, target):
>> diff --git a/framework/project_dpdk.py b/framework/project_dpdk.py
>> index b9a6d4a..402ac8d 100644
>> --- a/framework/project_dpdk.py
>> +++ b/framework/project_dpdk.py
>> @@ -33,7 +33,7 @@ import os
>>  import re
>>
>>  from settings import NICS, load_global_setting, accepted_nic
>> -from settings import DPDK_RXMODE_SETTING, HOST_DRIVER_SETTING
>> +from settings import DPDK_RXMODE_SETTING, HOST_DRIVER_SETTING,
>> HOST_DRIVER_MODE_SETTING
>>  from ssh_connection import SSHConnection
>>  from crb import Crb
>>  from dut import Dut
>> @@ -104,6 +104,11 @@ class DPDKdut(Dut):
>>              self.send_expect("modprobe vfio-pci", "#", 70)
>>              out = self.send_expect("lsmod | grep vfio_iommu_type1", "#")
>>              assert ("vfio_iommu_type1" in out), "Failed to setup vfio-
>> pci"
>> +
>> +            drivermode = load_global_setting(HOST_DRIVER_MODE_SETTING)
>> +            if drivermode == "noiommu":
>> +                self.send_expect("echo 1 >
>> /sys/module/vfio/parameters/enable_unsafe_noiommu_mode", "#", 70)
>> +
>>          else:
>>              self.send_expect("modprobe uio", "#", 70)
>>              out = self.send_expect("lsmod | grep igb_uio", "#")
>> @@ -130,6 +135,29 @@ class DPDKdut(Dut):
>>          out = self.send_expect("kldstat", "#")
>>          assert ("nic_uio" in out), "Failed to insmod nic_uio"
>>
>> +    def restore_modules(self):
>> +        """
>> +        Restore DPDK kernel module on DUT.
>> +        """
>> +        restore_modules = getattr(self, 'restore_modules_%s' %
>> self.get_os_type())
>> +        restore_modules()
>> +
>> +    def restore_modules_linux(self):
>> +        """
>> +        Restore DPDK Linux kernel module on DUT.
>> +        """
>> +        drivername = load_global_setting(HOST_DRIVER_SETTING)
>> +        if drivername == "vfio-pci":
>> +            drivermode = load_global_setting(HOST_DRIVER_MODE_SETTING)
>> +            if drivermode == "noiommu":
>> +                self.send_expect("echo 0 >
>> /sys/module/vfio/parameters/enable_unsafe_noiommu_mode", "#", 70)
>> +
>> +    def restore_modules_freebsd(self):
>> +        """
>> +        Restore DPDK Freebsd kernel module on DUT.
>> +        """
>> +        pass
>> +
>>      def set_rxtx_mode(self):
>>          """
>>          Set default RX/TX PMD function,
>> diff --git a/framework/settings.py b/framework/settings.py
>> index d306de2..e5b7746 100644
>> --- a/framework/settings.py
>> +++ b/framework/settings.py
>> @@ -204,6 +204,7 @@ DTS_ENV_PAT = r"DTS_*"
>>  PERF_SETTING = "DTS_PERF_ONLY"
>>  FUNC_SETTING = "DTS_FUNC_ONLY"
>>  HOST_DRIVER_SETTING = "DTS_HOST_DRIVER"
>> +HOST_DRIVER_MODE_SETTING = "DTS_HOST_DRIVER_MODE"
>>  HOST_NIC_SETTING = "DTS_HOST_NIC"
>>  DEBUG_SETTING = "DTS_DEBUG_ENABLE"
>>  DEBUG_CASE_SETTING = "DTS_DEBUGCASE_ENABLE"
>> diff --git a/tools/setup.py b/tools/setup.py
>> index 9fcd70e..c6c72bc 100755
>> --- a/tools/setup.py
>> +++ b/tools/setup.py
>> @@ -280,7 +280,7 @@ def config_execution():
>>      driver_option = {'prompt': 'Choose one of them',
>>                       'type': 'choice',
>>                       'help': 'Choose one of dpdk support driver',
>> -                     'options': ['igb_uio', 'vfio-pci'],
>> +                     'options': ['igb_uio', 'vfio-pci', 'vfio-
>> pci:noiommu'],
>>                       'default': '0'}
>>      opt = Option(**driver_option)
>>      driver_name = opt.parse_input()
>> --
>> 1.9.1
>