linux-kernel - Re: [PATCH v2 1/2] amd/iommu: Preserve domain ids inside the kdump kernel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20251126152040.GH520526@nvidia.com>
Date: Wed, 26 Nov 2025 11:20:40 -0400
From: Jason Gunthorpe <jgg@...dia.com>
To: Vasant Hegde <vasant.hegde@....com>
Cc: Sairaj Kodilkar <sarunkod@....com>, iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org, joro@...tes.org,
	suravee.suthikulpanit@....com, robin.murphy@....com,
	ashish.kalra@....com, will@...nel.org
Subject: Re: [PATCH v2 1/2] amd/iommu: Preserve domain ids inside the kdump
 kernel

On Wed, Nov 26, 2025 at 01:51:27PM +0530, Vasant Hegde wrote:
> It looks like on non-SNP system in kdump path, if it fails to reserve old DTE
> table, it tries to allocate new one! Looking into code again, it may be OK to
> fail in that path as well.. so that we will have common flow.

If it allocates a new (empty) one and does a full flush of the iommu
that would be OK?

Jason