From: Dave Hansen <dave.hansen@intel.com>
To: jacob.pan@linux.microsoft.com, Baolu Lu <baolu.lu@linux.intel.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>, 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>,
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>,
iommu@lists.linux.dev, security@kernel.org,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH 1/1] iommu/sva: Invalidate KVA range on kernel TLB flush
Date: Fri, 11 Jul 2025 07:36:20 -0700 [thread overview]
Message-ID: <d053739d-7fbe-46d8-9dcf-88e99cc5c60a@intel.com> (raw)
In-Reply-To: <20250710082808.52399e31@DESKTOP-0403QTC.>
On 7/10/25 08:28, Jacob Pan wrote:
> why would IOMMU cache all the entries if the walk is not successful?
This was one of those things which the IOMMU folks could have gone
either direction on. But, they generally choose to mirror the CPU
behavior when they can.
The CPU does page walks the same way. It probably requires less logic
because the caches can be filled while walking down the tree and don't
have to be evicted if the walk is ultimately unsuccessful.
prev parent reply other threads:[~2025-07-11 14:36 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-04 13:30 [PATCH 1/1] iommu/sva: Invalidate KVA range on kernel TLB flush Lu Baolu
2025-07-04 13:38 ` Jason Gunthorpe
2025-07-05 3:50 ` Baolu Lu
2025-07-05 9:06 ` Vasant Hegde
2025-07-08 5:42 ` Baolu Lu
2025-07-08 12:27 ` Jason Gunthorpe
2025-07-08 14:06 ` Jason Gunthorpe
2025-07-09 1:25 ` Baolu Lu
2025-07-09 15:51 ` Jacob Pan
2025-07-09 16:27 ` Jason Gunthorpe
2025-07-09 18:15 ` Jacob Pan
2025-07-09 18:22 ` Dave Hansen
2025-07-09 18:44 ` Jacob Pan
2025-07-09 18:54 ` Jason Gunthorpe
2025-07-14 12:39 ` David Laight
2025-07-14 13:19 ` Uladzislau Rezki
2025-07-14 14:50 ` Mike Rapoport
2025-07-15 0:05 ` Tian, Kevin
2025-07-15 1:19 ` Baolu Lu
2025-07-10 2:57 ` Baolu Lu
2025-07-10 15:28 ` Jacob Pan
2025-07-10 15:35 ` Jason Gunthorpe
2025-07-11 14:36 ` Dave Hansen [this message]
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