[Accel-config] Re: [PATCH 1/1] accel-config/test: Remove pasid_enabled restriction from test script

[Yu, Fenghua <fenghua.yu at intel.com>]

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Hi, Tony,

Is it possible for you to test Xiaochen's patch?

Thanks.

-Fenghua

> -----Original Message-----
> From: Shen, Xiaochen <xiaochen.shen(a)intel.com>
> Sent: Tuesday, June 28, 2022 8:00 PM
> To: Zhu, Tony <tony.zhu(a)intel.com>; Yu, Fenghua <fenghua.yu(a)intel.com>
> Cc: accel-config(a)lists.01.org; Thomas, Ramesh <ramesh.thomas(a)intel.com>;
> Shen, Xiaochen <xiaochen.shen(a)intel.com>
> Subject: RE: [PATCH 1/1] accel-config/test: Remove pasid_enabled restriction
> from test script
> 
> Hi Tony and Fenghua,
> 
> This issue may be impacted by this 5.19 upstream patch:
> 42a1b73852c4a176d233a192422b5e1d0ba67cbf dmaengine: idxd: Separate user
> and kernel pasid enabling
> 
> The sysfs interface "pasid_enabled" doesn't reflect the newly added flag:
>         IDXD_FLAG_PASID_ENABLED,
> +       IDXD_FLAG_USER_PASID_ENABLED,
> 
> 
> This patch may fix this issue:
> 
> diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c index
> dfd549685c46..53e34a1d62d9 100644
> --- a/drivers/dma/idxd/sysfs.c
> +++ b/drivers/dma/idxd/sysfs.c
> @@ -1223,7 +1223,8 @@ static ssize_t pasid_enabled_show(struct device *dev,
> {
>         struct idxd_device *idxd = confdev_to_idxd(dev);
> 
> -       return sysfs_emit(buf, "%u\n", device_pasid_enabled(idxd));
> +       return sysfs_emit(buf, "%u\n",
> +                         device_pasid_enabled(idxd) ||
> + device_user_pasid_enabled(idxd));
>  }
>  static DEVICE_ATTR_RO(pasid_enabled);
> 
> 
> Best regards,
> Xiaochen
> 
> -----Original Message-----
> From: Zhu, Tony <tony.zhu(a)intel.com>
> Sent: Wednesday, June 29, 2022 10:05
> To: Yu, Fenghua <fenghua.yu(a)intel.com>
> Cc: accel-config(a)lists.01.org; Thomas, Ramesh <ramesh.thomas(a)intel.com>
> Subject: [Accel-config] Re: [PATCH 1/1] accel-config/test: Remove
> pasid_enabled restriction from test script
> 
> Fenghua,
> 
>   pasid_enabled is 1 when it is scalable mode for old kernel such as spr-bkc. For
> kernel code 5.18, pasid_enabled is 0. Though pasid_enable is 0, but the passid is
> still assigned.
> I didn't know which commit bring this change. But from the test result, I could
> see pasid table entry in dmesg log.
> 
> 
> Tony(zhu, xinzhan)
> Cube:SHZ1-3W-279
> iNet:8821-5077
> 
> -----Original Message-----
> From: Yu, Fenghua <fenghua.yu(a)intel.com>
> Sent: Tuesday, June 28, 2022 11:38 PM
> To: Zhu, Tony <tony.zhu(a)intel.com>
> Cc: accel-config(a)lists.01.org; Thomas, Ramesh <ramesh.thomas(a)intel.com>
> Subject: Re: [PATCH 1/1] accel-config/test: Remove pasid_enabled restriction
> from test script
> 
> Hi, Tony,
> 
> On Tue, Jun 28, 2022 at 02:40:24PM +0800, Tony Zhu wrote:
> > Kernel removed the restriction because it broken accel-config. Failure
>                                            s/broken/breaks/
> > will happen during wq enable. Remove the checking from test script too.
> >
> > Signed-off-by: Tony Zhu <tony.zhu(a)intel.com>
> > ---
> >  test/dsa_user_test_runner.sh | 5 -----
> >  1 file changed, 5 deletions(-)
> >
> > diff --git a/test/dsa_user_test_runner.sh
> > b/test/dsa_user_test_runner.sh index dfaa930..ae9010d 100755
> > --- a/test/dsa_user_test_runner.sh
> > +++ b/test/dsa_user_test_runner.sh
> > @@ -19,11 +19,6 @@ check_min_kver "5.6" || do_skip "kernel does not
> support idxd"
> >  # skip if no pasid support as dsa_test does not support operation w/o pasid
> yet.
> >  [ ! -f "/sys/bus/dsa/devices/$DSA/pasid_enabled" ] && echo "No SVM
> support" && exit "$EXIT_SKIP"
> >
> > -pasid_en=$(cat /sys/bus/dsa/devices/$DSA/pasid_enabled)
> > -if [ "$pasid_en" -ne 1 ]; then
> > -	exit "$EXIT_SKIP"
> > -fi
> > -
> 
> Without pasid, what sub-tests can run? Seems to me, without PASID enabled,
> the test cannot continue.
> 
> >  start_dsa()
> >  {
> >  	configurable=$(cat /sys/bus/dsa/devices/$DSA/configurable)
> > --
> > 2.27.0
> >
> Thanks.
> 
> -Fenghua
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