linux-kernel - Re: [PATCH v2 0/7] iommu/vt-d: Add domain_alloc

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Message-ID: <ba234a15-2feb-4c52-83e1-e427010fc1fc@linux.intel.com>
Date: Tue, 29 Oct 2024 12:38:00 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: iommu@...ts.linux.dev
Cc: baolu.lu@...ux.intel.com, Joerg Roedel <joro@...tes.org>,
 Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
 Jason Gunthorpe <jgg@...pe.ca>, Kevin Tian <kevin.tian@...el.com>,
 Yi Liu <yi.l.liu@...el.com>, Vasant Hegde <vasant.hegde@....com>,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/7] iommu/vt-d: Add domain_alloc_paging support

On 2024/10/21 16:51, Lu Baolu wrote:
> The Intel iommu driver will now use the domain_alloc_paging callback and
> remove the legacy domain_alloc callback. This ensures that a valid
> device pointer is provided whenever a paging domain is allocated, and
> all dmar_domain attributes can be set up at the time of allocation.
> 
> Both first-stage and second-stage page tables can be used for a paging
> domain. Unless IOMMU_HWPT_ALLOC_NEST_PARENT or
> IOMMU_HWPT_ALLOC_DIRTY_TRACKING is specified during paging domain
> allocation, this driver will try to use first-stage page tables if the
> hardware is capable. This is assuming that the first-stage page table is
> compatible with both the host and guest kernels.
> 
> The whole series is also available on GitHub:
> https://github.com/LuBaolu/intel-iommu/commits/vtd-domain_alloc_paging-v2
> 
> Please help review and comment.
> 
> Change log:
> 
> v2:
>   - Make prepare_domain_attach_device() a specific helper to check
>     whether a paging domain is compatible with the iommu hardware
>     capability.
>   - Rename prepare_domain_attach_device() to paging_domain_compatible()
>     to make it more meaningful.
> 
> v1:https://lore.kernel.org/linux-iommu/20241011042722.73930-1- 
> baolu.lu@...ux.intel.com/
> 
> Lu Baolu (7):
>    iommu/vt-d: Add domain_alloc_paging support
>    iommu/vt-d: Remove unused domain_alloc callback
>    iommu/vt-d: Enhance compatibility check for paging domain attach
>    iommu/vt-d: Remove domain_update_iommu_cap()
>    iommu/vt-d: Remove domain_update_iommu_superpage()
>    iommu/vt-d: Refactor first_level_by_default()
>    iommu/vt-d: Refine intel_iommu_domain_alloc_user()
> 
>   drivers/iommu/intel/iommu.h  |   4 +-
>   drivers/iommu/intel/iommu.c  | 328 +++++++----------------------------
>   drivers/iommu/intel/nested.c |   2 +-
>   drivers/iommu/intel/pasid.c  |  28 +--
>   4 files changed, 64 insertions(+), 298 deletions(-)

Queued for v6.13.

--
baolu