RE: [RFC v3 00/10] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions

[Bharat Bhushan]

Hi Eric,

Have you sent out QEMU side patches based on this new approach? In case I missed please point me the patches? 

Thanks
-Bharat

> -----Original Message-----
> From: iommu-bounces@xxxxxxxxxxxxxxxxxxxxxxxxxx [mailto:iommu-
> bounces@xxxxxxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Eric Auger
> Sent: Tuesday, November 15, 2016 6:39 PM
> To: eric.auger@xxxxxxxxxx; eric.auger.pro@xxxxxxxxx;
> christoffer.dall@xxxxxxxxxx; marc.zyngier@xxxxxxx;
> robin.murphy@xxxxxxx; alex.williamson@xxxxxxxxxx;
> will.deacon@xxxxxxx; joro@xxxxxxxxxx; tglx@xxxxxxxxxxxxx;
> jason@xxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: drjones@xxxxxxxxxx; kvm@xxxxxxxxxxxxxxx; punit.agrawal@xxxxxxx;
> linux-kernel@xxxxxxxxxxxxxxx; iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx;
> pranav.sawargaonkar@xxxxxxxxx
> Subject: [RFC v3 00/10] KVM PCIe/MSI passthrough on ARM/ARM64 and
> IOVA reserved regions
> 
> Following LPC discussions, we now report reserved regions through iommu-
> group sysfs reserved_regions attribute file.
> 
> Reserved regions are populated through the IOMMU get_resv_region
> callback (former get_dm_regions), now implemented by amd-iommu, intel-
> iommu and arm-smmu.
> 
> The intel-iommu reports the [FEE0_0000h - FEF0_000h] MSI window as an
> IOMMU_RESV_NOMAP reserved region.
> 
> arm-smmu reports the MSI window (arbitrarily located at 0x8000000 and 1MB
> large) and the PCI host bridge windows.
> 
> The series integrates a not officially posted patch from Robin:
> "iommu/dma: Allow MSI-only cookies".
> 
> This series currently does not address IRQ safety assessment.
> 
> Best Regards
> 
> Eric
> 
> Git: complete series available at
> https://github.com/eauger/linux/tree/v4.9-rc5-reserved-rfc-v3
> 
> History:
> RFC v2 -> v3:
> - switch to an iommu-group sysfs API
> - use new dummy allocator provided by Robin
> - dummy allocator initialized by vfio-iommu-type1 after enumerating
>   the reserved regions
> - at the moment ARM MSI base address/size is left unchanged compared
>   to v2
> - we currently report reserved regions and not usable IOVA regions as
>   requested by Alex
> 
> RFC v1 -> v2:
> - fix intel_add_reserved_regions
> - add mutex lock/unlock in vfio_iommu_type1
> 
> 
> Eric Auger (10):
>   iommu/dma: Allow MSI-only cookies
>   iommu: Rename iommu_dm_regions into iommu_resv_regions
>   iommu: Add new reserved IOMMU attributes
>   iommu: iommu_alloc_resv_region
>   iommu: Do not map reserved regions
>   iommu: iommu_get_group_resv_regions
>   iommu: Implement reserved_regions iommu-group sysfs file
>   iommu/vt-d: Implement reserved region get/put callbacks
>   iommu/arm-smmu: Implement reserved region get/put callbacks
>   vfio/type1: Get MSI cookie
> 
>  drivers/iommu/amd_iommu.c       |  20 +++---
>  drivers/iommu/arm-smmu.c        |  52 +++++++++++++++
>  drivers/iommu/dma-iommu.c       | 116 ++++++++++++++++++++++++++----
> ---
>  drivers/iommu/intel-iommu.c     |  50 ++++++++++----
>  drivers/iommu/iommu.c           | 141
> ++++++++++++++++++++++++++++++++++++----
>  drivers/vfio/vfio_iommu_type1.c |  26 ++++++++
>  include/linux/dma-iommu.h       |   7 ++
>  include/linux/iommu.h           |  49 ++++++++++----
>  8 files changed, 391 insertions(+), 70 deletions(-)
> 
> --
> 1.9.1
> 
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