linux-kernel - Re: [PATCH v6 0/7] Fix stale IOTLB entries for kernel address space

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Message-ID: <c4f7c23f-48b3-49c1-8a40-fa388a1baa68@intel.com>
Date: Fri, 17 Oct 2025 10:31:54 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Jason Gunthorpe <jgg@...dia.com>, Baolu Lu <baolu.lu@...ux.intel.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, Joerg Roedel
 <joro@...tes.org>, Will Deacon <will@...nel.org>,
 Robin Murphy <robin.murphy@....com>, Kevin Tian <kevin.tian@...el.com>,
 Jann Horn <jannh@...gle.com>, Vasant Hegde <vasant.hegde@....com>,
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Alistair Popple <apopple@...dia.com>,
 Peter Zijlstra <peterz@...radead.org>, Uladzislau Rezki <urezki@...il.com>,
 Jean-Philippe Brucker <jean-philippe@...aro.org>,
 Andy Lutomirski <luto@...nel.org>, Yi Lai <yi1.lai@...el.com>,
 David Hildenbrand <david@...hat.com>,
 Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
 "Liam R . Howlett" <Liam.Howlett@...cle.com>,
 Vlastimil Babka <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>,
 Michal Hocko <mhocko@...nel.org>, Matthew Wilcox <willy@...radead.org>,
 iommu@...ts.linux.dev, security@...nel.org, x86@...nel.org,
 linux-mm@...ck.org, linux-kernel@...r.kernel.org,
 "Jiang, Dave" <dave.jiang@...el.com>,
 Vinicius Costa Gomes <vinicius.gomes@...el.com>
Subject: Re: [PATCH v6 0/7] Fix stale IOTLB entries for kernel address space

On 10/17/25 10:28, Dave Hansen wrote:
> I'm thinking that even messing with arch_vmap_pmd_supported() would be
> suboptimal. The easiest thing is to just stick the attached patch in
> stable kernels and disable SVA at compile time.

Gah, please just ignore the hunks in that patch other than the
drivers/iommu/intel/Kconfig one.