Re: [PATCH v1 0/8] PRI support for VT-d

[CLEMENT MATHIEU--DRIF]

On 05/07/2024 05:03, Yi Liu wrote:
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> On 2024/5/30 20:24, CLEMENT MATHIEU--DRIF wrote:
>> This series belongs to a list of series that add SVM support for VT-d.
>>
>> Here we focus on the implementation of PRI support in the IOMMU and
>> on a PCI-level
>> API for PRI to be used by virtual devices.
>>
>> This work is based on the VT-d specification version 4.1 (March 2023).
>> Here is a link to a GitHub repository where you can find the
>> following elements :
>>      - Qemu with all the patches for SVM
>>          - ATS
>>          - PRI
>>          - Device IOTLB invalidations
>>          - Requests with already translated addresses
>>      - A demo device
>>      - A simple driver for the demo device
>>      - A userspace program (for testing and demonstration purposes)
>
> I didn't see the drain PRQ related logics in this series. Please consider
> adding it in next version. It's needed when repurposing a PASID.

Hi,

Are you talking about wait descriptors with SW = 0, IF = 0, FN = 1
(section 7.10 of VT-d)?

I'll move that to the PRI series.

>
>> https://github.com/BullSequana/Qemu-in-guest-SVM-demo
>>
>>
>> Clément Mathieu--Drif (8):
>>    pcie: add a helper to declare the PRI capability for a pcie device
>>    pcie: helper functions to check to check if PRI is enabled
>>    pcie: add a way to get the outstanding page request allocation (pri)
>>      from the config space.
>>    pci: declare structures and IOMMU operation for PRI
>>    pci: add a PCI-level API for PRI
>>    intel_iommu: declare PRI constants and structures
>>    intel_iommu: declare registers for PRI
>>    intel_iommu: add PRI operations support
>>
>>   hw/i386/intel_iommu.c          | 302 +++++++++++++++++++++++++++++++++
>>   hw/i386/intel_iommu_internal.h |  54 +++++-
>>   hw/pci/pci.c                   |  37 ++++
>>   hw/pci/pcie.c                  |  42 +++++
>>   include/exec/memory.h          |  65 +++++++
>>   include/hw/pci/pci.h           |  45 +++++
>>   include/hw/pci/pci_bus.h       |   1 +
>>   include/hw/pci/pcie.h          |   7 +-
>>   include/hw/pci/pcie_regs.h     |   4 +
>>   system/memory.c                |  49 ++++++
>>   10 files changed, 604 insertions(+), 2 deletions(-)
>>
>
> --
> Regards,
> Yi Liu