[RFC PATCH 0/6] vfio: Add interface to map MSI pages

[RFC PATCH 0/6] vfio: Add interface to map MSI pages

[Bharat Bhushan]

This patch series add the interface to map MSI pages in iommu
for msi-capable device pass-through using vfio.

First patch adds a generic interface to set reserved iova regions.
These reserved regions can be used for mapping physical address.
Follow-up patches uses these reserved iova for mapping msi-pages.

This patch series does not provide interface to let user-space know
how many minimum reserved iova regions are required on a given platform.
This interface can be added once this patches series get reviewed and will
be in acceptable state.

Bharat Bhushan (6):
  vfio: Add interface for add/del reserved iova region
  iommu: Add interface to get msi-pages mapping attributes
  vfio: Extend iommu-info to return MSIs automap state
  vfio: Add interface to iommu-map/unmap MSI pages
  vfio-pci: Create iommu mapping for msi interrupt
  arm-smmu: Allow to set iommu mapping for MSI

 drivers/iommu/arm-smmu.c          |   8 +
 drivers/iommu/fsl_pamu_domain.c   |   3 +
 drivers/iommu/iommu.c             |  14 ++
 drivers/vfio/pci/vfio_pci_intrs.c |  36 +++-
 drivers/vfio/vfio.c               |  52 ++++++
 drivers/vfio/vfio_iommu_type1.c   | 344 +++++++++++++++++++++++++++++++++++++-
 include/linux/iommu.h             |   9 +-
 include/linux/vfio.h              |   9 +-
 include/uapi/linux/vfio.h         |  46 +++++
 9 files changed, 516 insertions(+), 5 deletions(-)

-- 
1.9.3

Re: [RFC PATCH 0/6] vfio: Add interface to map MSI pages

[Eric Auger]

Hi Bharat, all,

I now have access to HW that allows to bring out that task on ARM and I
would be happy to try contributing on this thread on both kernel and
QEMU side. Bharat, do you intend to respin shortly or can I try to
pursue your efforts while keeping credit to you (and also take into
account Pranav and Pavel contributions too if relevant)?

Thanks in advance

Best Regards

Eric

/2015 04:57 PM, Bharat Bhushan wrote:
> This patch series add the interface to map MSI pages in iommu
> for msi-capable device pass-through using vfio.
> 
> First patch adds a generic interface to set reserved iova regions.
> These reserved regions can be used for mapping physical address.
> Follow-up patches uses these reserved iova for mapping msi-pages.
> 
> This patch series does not provide interface to let user-space know
> how many minimum reserved iova regions are required on a given platform.
> This interface can be added once this patches series get reviewed and will
> be in acceptable state.
> 
> Bharat Bhushan (6):
>   vfio: Add interface for add/del reserved iova region
>   iommu: Add interface to get msi-pages mapping attributes
>   vfio: Extend iommu-info to return MSIs automap state
>   vfio: Add interface to iommu-map/unmap MSI pages
>   vfio-pci: Create iommu mapping for msi interrupt
>   arm-smmu: Allow to set iommu mapping for MSI
> 
>  drivers/iommu/arm-smmu.c          |   8 +
>  drivers/iommu/fsl_pamu_domain.c   |   3 +
>  drivers/iommu/iommu.c             |  14 ++
>  drivers/vfio/pci/vfio_pci_intrs.c |  36 +++-
>  drivers/vfio/vfio.c               |  52 ++++++
>  drivers/vfio/vfio_iommu_type1.c   | 344 +++++++++++++++++++++++++++++++++++++-
>  include/linux/iommu.h             |   9 +-
>  include/linux/vfio.h              |   9 +-
>  include/uapi/linux/vfio.h         |  46 +++++
>  9 files changed, 516 insertions(+), 5 deletions(-)
> 

RE: [RFC PATCH 0/6] vfio: Add interface to map MSI pages

[Bharat Bhushan]

Hi Eric,

> -----Original Message-----
> From: Eric Auger [mailto:eric.auger@linaro.org]
> Sent: Tuesday, January 12, 2016 2:26 PM
> To: Bharat Bhushan <Bharat.Bhushan@freescale.com>;
> kvmarm@lists.cs.columbia.edu; kvm@vger.kernel.org;
> alex.williamson@redhat.com
> Cc: christoffer.dall@linaro.org; pranavkumar@linaro.org;
> marc.zyngier@arm.com; will.deacon@arm.com; Pavel Fedin
> <p.fedin@samsung.com>; Pranavkumar Sawargaonkar
> <pranavkumar@linaro.org>
> Subject: Re: [RFC PATCH 0/6] vfio: Add interface to map MSI pages
> 
> Hi Bharat, all,
> 
> I now have access to HW that allows to bring out that task on ARM and I
> would be happy to try contributing on this thread on both kernel and QEMU
> side. Bharat, do you intend to respin shortly or can I try to pursue your
> efforts while keeping credit to you (and also take into account Pranav and
> Pavel contributions too if relevant)?

It is pending for long and I do think I will be able to work in next couple of months on this activity. It will be helpful if you can take on from whatever little I have done.

Thanks
-Bharat

> 
> Thanks in advance
> 
> Best Regards
> 
> Eric
> 
> /2015 04:57 PM, Bharat Bhushan wrote:
> > This patch series add the interface to map MSI pages in iommu for
> > msi-capable device pass-through using vfio.
> >
> > First patch adds a generic interface to set reserved iova regions.
> > These reserved regions can be used for mapping physical address.
> > Follow-up patches uses these reserved iova for mapping msi-pages.
> >
> > This patch series does not provide interface to let user-space know
> > how many minimum reserved iova regions are required on a given
> platform.
> > This interface can be added once this patches series get reviewed and
> > will be in acceptable state.
> >
> > Bharat Bhushan (6):
> >   vfio: Add interface for add/del reserved iova region
> >   iommu: Add interface to get msi-pages mapping attributes
> >   vfio: Extend iommu-info to return MSIs automap state
> >   vfio: Add interface to iommu-map/unmap MSI pages
> >   vfio-pci: Create iommu mapping for msi interrupt
> >   arm-smmu: Allow to set iommu mapping for MSI
> >
> >  drivers/iommu/arm-smmu.c          |   8 +
> >  drivers/iommu/fsl_pamu_domain.c   |   3 +
> >  drivers/iommu/iommu.c             |  14 ++
> >  drivers/vfio/pci/vfio_pci_intrs.c |  36 +++-
> >  drivers/vfio/vfio.c               |  52 ++++++
> >  drivers/vfio/vfio_iommu_type1.c   | 344
> +++++++++++++++++++++++++++++++++++++-
> >  include/linux/iommu.h             |   9 +-
> >  include/linux/vfio.h              |   9 +-
> >  include/uapi/linux/vfio.h         |  46 +++++
> >  9 files changed, 516 insertions(+), 5 deletions(-)
> >

Re: [RFC PATCH 0/6] vfio: Add interface to map MSI pages

[Eric Auger]

Hi Bharat,
On 01/12/2016 10:00 AM, Bharat Bhushan wrote:
> Hi Eric,
> 
>> -----Original Message-----
>> From: Eric Auger [mailto:eric.auger@linaro.org]
>> Sent: Tuesday, January 12, 2016 2:26 PM
>> To: Bharat Bhushan <Bharat.Bhushan@freescale.com>;
>> kvmarm@lists.cs.columbia.edu; kvm@vger.kernel.org;
>> alex.williamson@redhat.com
>> Cc: christoffer.dall@linaro.org; pranavkumar@linaro.org;
>> marc.zyngier@arm.com; will.deacon@arm.com; Pavel Fedin
>> <p.fedin@samsung.com>; Pranavkumar Sawargaonkar
>> <pranavkumar@linaro.org>
>> Subject: Re: [RFC PATCH 0/6] vfio: Add interface to map MSI pages
>>
>> Hi Bharat, all,
>>
>> I now have access to HW that allows to bring out that task on ARM and I
>> would be happy to try contributing on this thread on both kernel and QEMU
>> side. Bharat, do you intend to respin shortly or can I try to pursue your
>> efforts while keeping credit to you (and also take into account Pranav and
>> Pavel contributions too if relevant)?
> 
> It is pending for long and I do think I will be able to work in next couple of months on this activity. It will be helpful if you can take on from whatever little I have done.
> 
OK thanks for your quick answer. I will do my utmost ;-)

Best Regards

Eric
> Thanks
> -Bharat
> 
>>
>> Thanks in advance
>>
>> Best Regards
>>
>> Eric
>>
>> /2015 04:57 PM, Bharat Bhushan wrote:
>>> This patch series add the interface to map MSI pages in iommu for
>>> msi-capable device pass-through using vfio.
>>>
>>> First patch adds a generic interface to set reserved iova regions.
>>> These reserved regions can be used for mapping physical address.
>>> Follow-up patches uses these reserved iova for mapping msi-pages.
>>>
>>> This patch series does not provide interface to let user-space know
>>> how many minimum reserved iova regions are required on a given
>> platform.
>>> This interface can be added once this patches series get reviewed and
>>> will be in acceptable state.
>>>
>>> Bharat Bhushan (6):
>>>   vfio: Add interface for add/del reserved iova region
>>>   iommu: Add interface to get msi-pages mapping attributes
>>>   vfio: Extend iommu-info to return MSIs automap state
>>>   vfio: Add interface to iommu-map/unmap MSI pages
>>>   vfio-pci: Create iommu mapping for msi interrupt
>>>   arm-smmu: Allow to set iommu mapping for MSI
>>>
>>>  drivers/iommu/arm-smmu.c          |   8 +
>>>  drivers/iommu/fsl_pamu_domain.c   |   3 +
>>>  drivers/iommu/iommu.c             |  14 ++
>>>  drivers/vfio/pci/vfio_pci_intrs.c |  36 +++-
>>>  drivers/vfio/vfio.c               |  52 ++++++
>>>  drivers/vfio/vfio_iommu_type1.c   | 344
>> +++++++++++++++++++++++++++++++++++++-
>>>  include/linux/iommu.h             |   9 +-
>>>  include/linux/vfio.h              |   9 +-
>>>  include/uapi/linux/vfio.h         |  46 +++++
>>>  9 files changed, 516 insertions(+), 5 deletions(-)
>>>
> 

RE: [RFC PATCH 0/6] vfio: Add interface to map MSI pages

[Pavel Fedin]

 Hello!

> I now have access to HW that allows to bring out that task on ARM and I
> would be happy to try contributing on this thread on both kernel and
> QEMU side. Bharat, do you intend to respin shortly or can I try to
> pursue your efforts while keeping credit to you (and also take into
> account Pranav and Pavel contributions too if relevant)?

 You can take my contributions of course. But our project dropped ARM64, so i cannot take active part in the development. However i
keep track of the topic, just in case.

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia

Re: [RFC PATCH 0/6] vfio: Add interface to map MSI pages

[Eric Auger]

Hi Pavel,
On 01/12/2016 10:49 AM, Pavel Fedin wrote:
>  Hello!
> 
>> I now have access to HW that allows to bring out that task on ARM and I
>> would be happy to try contributing on this thread on both kernel and
>> QEMU side. Bharat, do you intend to respin shortly or can I try to
>> pursue your efforts while keeping credit to you (and also take into
>> account Pranav and Pavel contributions too if relevant)?
> 
>  You can take my contributions of course. But our project dropped ARM64, so i cannot take active part in the development. However i
> keep track of the topic, just in case.
OK thanks. Wishing you a good ramp-up on new activities.

Best Regards

Eric
> 
> Kind regards,
> Pavel Fedin
> Expert Engineer
> Samsung Electronics Research center Russia
> 
> 

Re: [RFC PATCH 0/6] vfio: Add interface to map MSI pages

[Pranav Sawargaonkar]

Hi Eric,

On Tue, Jan 12, 2016 at 4:04 PM, Eric Auger <eric.auger@linaro.org> wrote:
>
> Hi Pavel,
> On 01/12/2016 10:49 AM, Pavel Fedin wrote:
> >  Hello!
> >
> >> I now have access to HW that allows to bring out that task on ARM and I
> >> would be happy to try contributing on this thread on both kernel and
> >> QEMU side. Bharat, do you intend to respin shortly or can I try to
> >> pursue your efforts while keeping credit to you (and also take into
> >> account Pranav and Pavel contributions too if relevant)?


Yes please take my contributions if relevant. I can help you to test
your patches on arm64 based xgene2 hardware having smmu.

> >
> >  You can take my contributions of course. But our project dropped ARM64, so i cannot take active part in the development. However i
> > keep track of the topic, just in case.
> OK thanks. Wishing you a good ramp-up on new activities.
>
> Best Regards
>
> Eric

Thanks,
Pranav
>
> >
> > Kind regards,
> > Pavel Fedin
> > Expert Engineer
> > Samsung Electronics Research center Russia
> >
> >
>
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