From: Jason Gunthorpe <jgg@nvidia.com>
To: Lu Baolu <baolu.lu@linux.intel.com>
Cc: 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>,
Dave Hansen <dave.hansen@intel.com>,
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>,
iommu@lists.linux.dev, security@kernel.org,
linux-kernel@vger.kernel.org,
Dave Hansen <dave.hansen@linux.intel.com>
Subject: Re: [PATCH v4 2/8] mm: Actually mark kernel page table pages
Date: Fri, 5 Sep 2025 15:24:54 -0300 [thread overview]
Message-ID: <20250905182454.GN616306@nvidia.com> (raw)
In-Reply-To: <20250905055103.3821518-3-baolu.lu@linux.intel.com>
On Fri, Sep 05, 2025 at 01:50:57PM +0800, Lu Baolu wrote:
> From: Dave Hansen <dave.hansen@linux.intel.com>
>
> Now that the API is in place, mark kernel page table pages just
> after they are allocated. Unmark them just before they are freed.
>
> Note: Unconditionally clearing the 'kernel' marking (via
> ptdesc_clear_kernel()) would be functionally identical to what
> is here. But having the if() makes it logically clear that this
> function can be used for kernel and non-kernel page tables.
>
> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
> ---
> include/asm-generic/pgalloc.h | 18 ++++++++++++++++++
> include/linux/mm.h | 3 +++
> 2 files changed, 21 insertions(+)
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
next prev parent reply other threads:[~2025-09-05 18:25 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-05 5:50 [PATCH v4 0/8] Fix stale IOTLB entries for kernel address space Lu Baolu
2025-09-05 5:50 ` [PATCH v4 1/8] mm: Add a ptdesc flag to mark kernel page tables Lu Baolu
2025-09-05 18:24 ` Jason Gunthorpe
2025-09-12 7:58 ` Tian, Kevin
2025-09-05 5:50 ` [PATCH v4 2/8] mm: Actually mark kernel page table pages Lu Baolu
2025-09-05 18:24 ` Jason Gunthorpe [this message]
2025-09-12 7:59 ` Tian, Kevin
2025-09-05 5:50 ` [PATCH v4 3/8] x86/mm: Use 'ptdesc' when freeing PMD pages Lu Baolu
2025-09-05 18:25 ` Jason Gunthorpe
2025-09-12 8:03 ` Tian, Kevin
2025-09-05 5:50 ` [PATCH v4 4/8] mm: Introduce pure page table freeing function Lu Baolu
2025-09-05 18:31 ` Jason Gunthorpe
2025-09-12 8:04 ` Tian, Kevin
2025-09-05 5:51 ` [PATCH v4 5/8] x86/mm: Use pagetable_free() Lu Baolu
2025-09-05 18:41 ` Jason Gunthorpe
2025-09-05 19:22 ` Dave Hansen
2025-09-05 20:11 ` Dave Hansen
2025-09-05 23:04 ` Jason Gunthorpe
2025-09-19 5:31 ` Baolu Lu
2025-09-05 5:51 ` [PATCH v4 6/8] mm: Introduce deferred freeing for kernel page tables Lu Baolu
2025-09-05 18:43 ` Jason Gunthorpe
2025-09-05 19:26 ` Dave Hansen
2025-09-12 8:17 ` Tian, Kevin
2025-09-15 11:35 ` Jason Gunthorpe
2025-09-19 8:18 ` Tian, Kevin
2025-09-12 8:14 ` Tian, Kevin
2025-09-15 1:16 ` Baolu Lu
2025-09-05 5:51 ` [PATCH v4 7/8] mm: Hook up Kconfig options for async page table freeing Lu Baolu
2025-09-05 18:44 ` Jason Gunthorpe
2025-09-12 8:19 ` Tian, Kevin
2025-09-05 5:51 ` [PATCH v4 8/8] iommu/sva: Invalidate stale IOTLB entries for kernel address space Lu Baolu
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