From: Jason Gunthorpe <jgg@ziepe.ca>
To: Ankit Soni <Ankit.Soni@amd.com>
Cc: iommu@lists.linux.dev, vasant.hegde@amd.com,
suravee.suthikulpanit@amd.com, joro@8bytes.org, will@kernel.org,
robin.murphy@arm.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 2/4] iommu_pt: support small VA for AMDv1
Date: Mon, 13 Apr 2026 13:11:40 -0300 [thread overview]
Message-ID: <20260413161140.GO3694781@ziepe.ca> (raw)
In-Reply-To: <64515b0d53c541ae52347ac3c0f90b75bcbde0c2.1776075533.git.Ankit.Soni@amd.com>
On Mon, Apr 13, 2026 at 02:45:19PM +0000, Ankit Soni wrote:
> When hardware/VM request a small VA limit, the generic page-table code
> clears PT_FEAT_DYNAMIC_TOP. This later causes domain initialization to
> fail with -EOPNOTSUPP.
>
> Remove the clearing so init succeeds when the VA fits in the starting
> level and no top-level growth is needed.
>
> Signed-off-by: Ankit Soni <Ankit.Soni@amd.com>
> ---
> drivers/iommu/generic_pt/iommu_pt.h | 4 ----
> 1 file changed, 4 deletions(-)
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
next prev parent reply other threads:[~2026-04-13 16:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-13 14:45 [PATCH v5 0/4] Respect VASIZE for address limits Ankit Soni
2026-04-13 14:45 ` [PATCH v5 1/4] iommu_pt: Fix pgsize_bitmap calculation in get_info for smaller vasz's Ankit Soni
2026-04-13 16:11 ` Jason Gunthorpe
2026-04-13 14:45 ` [PATCH v5 2/4] iommu_pt: support small VA for AMDv1 Ankit Soni
2026-04-13 16:11 ` Jason Gunthorpe [this message]
2026-04-13 14:45 ` [PATCH v5 3/4] iommu_pt: add kunit config for 32-bit VA (amdv1_cfg_1) Ankit Soni
2026-04-13 14:45 ` [PATCH v5 4/4] iommu/amd: Adhere to IVINFO[VASIZE] for address limits Ankit Soni
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