diff mbox series

[v4,4/4] vdpa_sim: Implement resume vdpa op

Message ID 56c045ac70e44e7d80f3f9e901deae3d7485b2a1.1666082013.git.sebastien.boeuf@intel.com
State New
Headers
Series vdpa: Add resume operation |

Commit Message

Boeuf, Sebastien Oct. 18, 2022, 8:37 a.m. UTC 
  From: Sebastien Boeuf <sebastien.boeuf@intel.com>

Implement resume operation for vdpa_sim devices, so vhost-vdpa will
offer that backend feature and userspace can effectively resume the
device.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Comments

kernel test robot Oct. 18, 2022, 10:53 a.m. UTC | #1 
Hi,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on mst-vhost/linux-next]
[also build test WARNING on linus/master v6.1-rc1 next-20221018]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/sebastien-boeuf-intel-com/vdpa-Add-resume-operation/20221018-163858
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
patch link:    https://lore.kernel.org/r/56c045ac70e44e7d80f3f9e901deae3d7485b2a1.1666082013.git.sebastien.boeuf%40intel.com
patch subject: [PATCH v4 4/4] vdpa_sim: Implement resume vdpa op
config: x86_64-allyesconfig
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/63349eb63715840620ea16e0098110ad5883b901
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review sebastien-boeuf-intel-com/vdpa-Add-resume-operation/20221018-163858
        git checkout 63349eb63715840620ea16e0098110ad5883b901
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/vdpa/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/vdpa/vdpa_sim/vdpa_sim.c: In function 'vdpasim_resume':
>> drivers/vdpa/vdpa_sim/vdpa_sim.c:533:13: warning: unused variable 'i' [-Wunused-variable]
     533 |         int i;
         |             ^


vim +/i +533 drivers/vdpa/vdpa_sim/vdpa_sim.c

   529	
   530	static int vdpasim_resume(struct vdpa_device *vdpa)
   531	{
   532		struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
 > 533		int i;
   534	
   535		spin_lock(&vdpasim->lock);
   536		vdpasim->running = true;
   537		spin_unlock(&vdpasim->lock);
   538	
   539		return 0;
   540	}
   541
Eugenio Perez Martin Oct. 19, 2022, 9:31 a.m. UTC | #2 
On Tue, Oct 18, 2022 at 10:38 AM <sebastien.boeuf@intel.com> wrote:
>
> From: Sebastien Boeuf <sebastien.boeuf@intel.com>
>
> Implement resume operation for vdpa_sim devices, so vhost-vdpa will
> offer that backend feature and userspace can effectively resume the
> device.
>
> Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
> ---
>  drivers/vdpa/vdpa_sim/vdpa_sim.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
>
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index b071f0d842fb..05e3802fb746 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -527,6 +527,18 @@ static int vdpasim_suspend(struct vdpa_device *vdpa)
>         return 0;
>  }
>
> +static int vdpasim_resume(struct vdpa_device *vdpa)
> +{
> +       struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
> +       int i;
> +
> +       spin_lock(&vdpasim->lock);
> +       vdpasim->running = true;
> +       spin_unlock(&vdpasim->lock);
> +
> +       return 0;
> +}
> +

To never kick at resuming is not the right thing to do :).

Maybe to store in the vdpasim_virtqueue if it was kicked during the
suspend window?

Thanks!



>  static size_t vdpasim_get_config_size(struct vdpa_device *vdpa)
>  {
>         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
> @@ -717,6 +729,7 @@ static const struct vdpa_config_ops vdpasim_config_ops = {
>         .set_status             = vdpasim_set_status,
>         .reset                  = vdpasim_reset,
>         .suspend                = vdpasim_suspend,
> +       .resume                 = vdpasim_resume,
>         .get_config_size        = vdpasim_get_config_size,
>         .get_config             = vdpasim_get_config,
>         .set_config             = vdpasim_set_config,
> @@ -750,6 +763,7 @@ static const struct vdpa_config_ops vdpasim_batch_config_ops = {
>         .set_status             = vdpasim_set_status,
>         .reset                  = vdpasim_reset,
>         .suspend                = vdpasim_suspend,
> +       .resume                 = vdpasim_resume,
>         .get_config_size        = vdpasim_get_config_size,
>         .get_config             = vdpasim_get_config,
>         .set_config             = vdpasim_set_config,
> --
> 2.34.1
>
> ---------------------------------------------------------------------
> Intel Corporation SAS (French simplified joint stock company)
> Registered headquarters: "Les Montalets"- 2, rue de Paris,
> 92196 Meudon Cedex, France
> Registration Number:  302 456 199 R.C.S. NANTERRE
> Capital: 5 208 026.16 Euros
>
> This e-mail and any attachments may contain confidential material for
> the sole use of the intended recipient(s). Any review or distribution
> by others is strictly prohibited. If you are not the intended
> recipient, please contact the sender and delete all copies.
>
Boeuf, Sebastien Oct. 19, 2022, 9:37 a.m. UTC | #3 
On Wed, 2022-10-19 at 11:31 +0200, Eugenio Perez Martin wrote:
> On Tue, Oct 18, 2022 at 10:38 AM <sebastien.boeuf@intel.com> wrote:
> > 
> > From: Sebastien Boeuf <sebastien.boeuf@intel.com>
> > 
> > Implement resume operation for vdpa_sim devices, so vhost-vdpa will
> > offer that backend feature and userspace can effectively resume the
> > device.
> > 
> > Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
> > ---
> >  drivers/vdpa/vdpa_sim/vdpa_sim.c | 14 ++++++++++++++
> >  1 file changed, 14 insertions(+)
> > 
> > diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> > b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> > index b071f0d842fb..05e3802fb746 100644
> > --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> > +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> > @@ -527,6 +527,18 @@ static int vdpasim_suspend(struct vdpa_device
> > *vdpa)
> >         return 0;
> >  }
> > 
> > +static int vdpasim_resume(struct vdpa_device *vdpa)
> > +{
> > +       struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
> > +       int i;
> > +
> > +       spin_lock(&vdpasim->lock);
> > +       vdpasim->running = true;
> > +       spin_unlock(&vdpasim->lock);
> > +
> > +       return 0;
> > +}
> > +
> 
> To never kick at resuming is not the right thing to do :).
> 
> Maybe to store in the vdpasim_virtqueue if it was kicked during the
> suspend window?
> 
> Thanks!

Let's hear what Michael think about this approach?
I just want to make sure we're all on the same page before I send the
next version :)

Thanks,
Sebastien

> 
> 
> 
> >  static size_t vdpasim_get_config_size(struct vdpa_device *vdpa)
> >  {
> >         struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
> > @@ -717,6 +729,7 @@ static const struct vdpa_config_ops
> > vdpasim_config_ops = {
> >         .set_status             = vdpasim_set_status,
> >         .reset                  = vdpasim_reset,
> >         .suspend                = vdpasim_suspend,
> > +       .resume                 = vdpasim_resume,
> >         .get_config_size        = vdpasim_get_config_size,
> >         .get_config             = vdpasim_get_config,
> >         .set_config             = vdpasim_set_config,
> > @@ -750,6 +763,7 @@ static const struct vdpa_config_ops
> > vdpasim_batch_config_ops = {
> >         .set_status             = vdpasim_set_status,
> >         .reset                  = vdpasim_reset,
> >         .suspend                = vdpasim_suspend,
> > +       .resume                 = vdpasim_resume,
> >         .get_config_size        = vdpasim_get_config_size,
> >         .get_config             = vdpasim_get_config,
> >         .set_config             = vdpasim_set_config,
> > --
> > 2.34.1
> > 
> > -------------------------------------------------------------------
> > --
> > Intel Corporation SAS (French simplified joint stock company)
> > Registered headquarters: "Les Montalets"- 2, rue de Paris,
> > 92196 Meudon Cedex, France
> > Registration Number:  302 456 199 R.C.S. NANTERRE
> > Capital: 5 208 026.16 Euros
> > 
> > This e-mail and any attachments may contain confidential material
> > for
> > the sole use of the intended recipient(s). Any review or
> > distribution
> > by others is strictly prohibited. If you are not the intended
> > recipient, please contact the sender and delete all copies.
> > 
> 

---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 5 208 026.16 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.
diff mbox series

Patch

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index b071f0d842fb..05e3802fb746 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -527,6 +527,18 @@  static int vdpasim_suspend(struct vdpa_device *vdpa)
 	return 0;
 }
 
+static int vdpasim_resume(struct vdpa_device *vdpa)
+{
+	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
+	int i;
+
+	spin_lock(&vdpasim->lock);
+	vdpasim->running = true;
+	spin_unlock(&vdpasim->lock);
+
+	return 0;
+}
+
 static size_t vdpasim_get_config_size(struct vdpa_device *vdpa)
 {
 	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
@@ -717,6 +729,7 @@  static const struct vdpa_config_ops vdpasim_config_ops = {
 	.set_status             = vdpasim_set_status,
 	.reset			= vdpasim_reset,
 	.suspend		= vdpasim_suspend,
+	.resume			= vdpasim_resume,
 	.get_config_size        = vdpasim_get_config_size,
 	.get_config             = vdpasim_get_config,
 	.set_config             = vdpasim_set_config,
@@ -750,6 +763,7 @@  static const struct vdpa_config_ops vdpasim_batch_config_ops = {
 	.set_status             = vdpasim_set_status,
 	.reset			= vdpasim_reset,
 	.suspend		= vdpasim_suspend,
+	.resume			= vdpasim_resume,
 	.get_config_size        = vdpasim_get_config_size,
 	.get_config             = vdpasim_get_config,
 	.set_config             = vdpasim_set_config,