From: Baolu Lu <baolu.lu@linux.intel.com>
To: Samiullah Khawaja <skhawaja@google.com>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Jason Gunthorpe <jgg@ziepe.ca>,
David Woodhouse <dwmw2@infradead.org>
Cc: baolu.lu@linux.intel.com, Robin Murphy <robin.murphy@arm.com>,
Kevin Tian <kevin.tian@intel.com>,
Alex Williamson <alex@shazbot.org>, Shuah Khan <shuah@kernel.org>,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, Pratyush Yadav <pratyush@kernel.org>,
Pasha Tatashin <pasha.tatashin@soleen.com>,
David Matlack <dmatlack@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Pranjal Shrivastava <praan@google.com>,
Vipin Sharma <vipinsh@google.com>,
Ankit Soni <Ankit.Soni@amd.com>,
Nicolin Chen <nicolinc@nvidia.com>, John Starks <dev@jstarks.net>
Subject: Re: [PATCH v6 03/18] iommupt: Implement preserve/unpreserve/restore callbacks
Date: Fri, 30 Oct 2026 11:07:20 +0800 [thread overview]
Message-ID: <14cf71cd-35cd-45b1-a0fe-94d4a76e9e06@linux.intel.com> (raw)
In-Reply-To: <20261025021930.674647-4-skhawaja@google.com>
On 10/25/2026 10:19 AM, Samiullah Khawaja wrote:
> Add iommupt ops for presevation, unpresevation and restoration of iommu
... preservation, unpreservation ...
> page tables for liveupdate. Use the existing page walker to preserve the
> ioptdesc of the top_table and the lower tables.
>
> Preserve top_level, VASZ and FEAT Sign Extended to restore the domain in
> the next kernel. On restore, the domain has only the preserved features
> enabled and all the other features are zeroed. This is ok since the
> restored domain is made immutable and can only be freed. A kunit test is
> added to verify that the IOMMU domain free can be done with trimmed
> features.
>
> Signed-off-by: Samiullah Khawaja<skhawaja@google.com>
> ---
> drivers/iommu/generic_pt/iommu_pt.h | 155 ++++++++++++++++++++++
> drivers/iommu/generic_pt/kunit_iommu_pt.h | 30 +++++
> include/linux/generic_pt/iommu.h | 30 +++++
> 3 files changed, 215 insertions(+)
This patch looks good to me,
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
next prev parent reply other threads:[~2026-10-30 3:07 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-25 2:19 [PATCH v6 00/18] iommu: Add live update state preservation Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 01/18] iommu: Implement IOMMU Live update FLB callbacks Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 02/18] iommu/pages: Add APIs to preserve/unpreserve/restore iommu pages Samiullah Khawaja
2026-10-30 1:26 ` Baolu Lu
2026-10-25 2:19 ` [PATCH v6 03/18] iommupt: Implement preserve/unpreserve/restore callbacks Samiullah Khawaja
2026-10-30 3:07 ` Baolu Lu [this message]
2026-10-25 2:19 ` [PATCH v6 04/18] iommu: Implement IOMMU domain preservation Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 05/18] iommu: Implement device and IOMMU HW preservation Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 06/18] iommu/vt-d: Implement device and iommu preserve/unpreserve ops Samiullah Khawaja
2026-10-28 1:51 ` Baolu Lu
2026-10-28 3:10 ` Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 07/18] iommu/vt-d: Clear unpreserved context entries during shutdown Samiullah Khawaja
2026-10-28 3:18 ` Baolu Lu
2026-10-29 0:34 ` Samiullah Khawaja
2026-10-29 3:18 ` Baolu Lu
2026-10-29 22:00 ` Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 08/18] iommu: Add APIs to get iommu and device preserved state Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 09/18] iommu/vt-d: Combine disable_dmar_iommu() and free_dmar_iommu() Samiullah Khawaja
2026-10-28 6:01 ` Baolu Lu
2026-10-29 0:33 ` Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 10/18] iommu/vt-d: Restore IOMMU state and reclaimed domain ids Samiullah Khawaja
2026-10-28 7:14 ` Baolu Lu
2026-10-29 0:32 ` Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 11/18] iommu/vt-d: Preserve PASID table of preserved device Samiullah Khawaja
2026-10-29 7:42 ` Baolu Lu
2026-10-25 2:19 ` [PATCH v6 12/18] iommu: Restore and reattach preserved domains to devices Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 13/18] iommu/vt-d: Handle reattach of the restored domain Samiullah Khawaja
2026-10-29 8:28 ` Baolu Lu
2026-10-29 22:34 ` Samiullah Khawaja
2026-10-29 23:38 ` Baolu Lu
2026-10-25 2:19 ` [PATCH v6 14/18] iommufd: Implement ioctl to mark HWPT for preservation Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 15/18] iommufd: Persist iommu hardware pagetables for live update Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 16/18] iommufd: Add APIs to preserve/unpreserve a vfio cdev Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 17/18] vfio/pci: Preserve the iommufd state of the " Samiullah Khawaja
2026-10-25 2:19 ` [PATCH v6 18/18] iommufd/selftest: Add test to verify iommufd preservation Samiullah Khawaja
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