From: Jason Gunthorpe <jgg@nvidia.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Baolu Lu <baolu.lu@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Kevin Tian <kevin.tian@intel.com>, Jann Horn <jannh@google.com>,
Vasant Hegde <vasant.hegde@amd.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Alistair Popple <apopple@nvidia.com>,
Peter Zijlstra <peterz@infradead.org>,
Uladzislau Rezki <urezki@gmail.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Andy Lutomirski <luto@kernel.org>, Yi Lai <yi1.lai@intel.com>,
David Hildenbrand <david@redhat.com>,
Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
"Liam R . Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>, Mike Rapoport <rppt@kernel.org>,
Michal Hocko <mhocko@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
iommu@lists.linux.dev, security@kernel.org, x86@kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org, "Jiang,
Dave" <dave.jiang@intel.com>,
Vinicius Costa Gomes <vinicius.gomes@intel.com>
Subject: Re: [PATCH v6 0/7] Fix stale IOTLB entries for kernel address space
Date: Fri, 17 Oct 2025 14:54:37 -0300 [thread overview]
Message-ID: <20251017175437.GD316284@nvidia.com> (raw)
In-Reply-To: <c4f7c23f-48b3-49c1-8a40-fa388a1baa68@intel.com>
On Fri, Oct 17, 2025 at 10:31:54AM -0700, Dave Hansen wrote:
> 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.
The AMD driver has to be disabled too and there is no kconfig for it.
I think it would be simpler to just patch iommu_sva_bind_device()
with like:
if (IS_ENABLED(CONFIG_X86))
return ERR_PTR(-EOPNOTSUPP);
Jason
next prev parent reply other threads:[~2025-10-17 17:54 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-14 13:04 [PATCH v6 0/7] Fix stale IOTLB entries for kernel address space Lu Baolu
2025-10-14 13:04 ` [PATCH v6 1/7] mm: Add a ptdesc flag to mark kernel page tables Lu Baolu
2025-10-16 19:26 ` David Hildenbrand
2025-10-14 13:04 ` [PATCH v6 2/7] mm: Actually mark kernel page table pages Lu Baolu
2025-10-14 13:04 ` [PATCH v6 3/7] x86/mm: Use 'ptdesc' when freeing PMD pages Lu Baolu
2025-10-14 23:19 ` Dave Hansen
2025-10-15 5:19 ` Baolu Lu
2025-10-16 19:33 ` David Hildenbrand
2025-10-14 13:04 ` [PATCH v6 4/7] mm: Introduce pure page table freeing function Lu Baolu
2025-10-14 13:04 ` [PATCH v6 5/7] x86/mm: Use pagetable_free() Lu Baolu
2025-10-14 13:04 ` [PATCH v6 6/7] mm: Introduce deferred freeing for kernel page tables Lu Baolu
2025-10-16 19:35 ` David Hildenbrand
2025-10-17 1:29 ` Baolu Lu
2025-10-14 13:04 ` [PATCH v6 7/7] iommu/sva: Invalidate stale IOTLB entries for kernel address space Lu Baolu
2025-10-14 20:59 ` [syzbot ci] Re: Fix " syzbot ci
2025-10-15 16:25 ` Dave Hansen
2025-10-16 8:00 ` Baolu Lu
2025-10-17 17:05 ` Dave Hansen
2025-10-17 17:10 ` David Hildenbrand
2025-10-20 5:34 ` Baolu Lu
2025-10-20 14:26 ` David Hildenbrand
2025-10-15 0:43 ` [PATCH v6 0/7] " Andrew Morton
2025-10-15 5:38 ` Baolu Lu
2025-10-15 15:55 ` Dave Hansen
2025-10-17 1:42 ` Baolu Lu
2025-10-17 14:01 ` Jason Gunthorpe
2025-10-17 17:28 ` Dave Hansen
2025-10-17 17:31 ` Dave Hansen
2025-10-17 17:54 ` Jason Gunthorpe [this message]
2025-10-17 18:26 ` Vinicius Costa Gomes
2025-10-22 5:06 ` Baolu Lu
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