From: Baolu Lu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Kevin Tian <kevin.tian@intel.com>
Cc: iommu@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] iommu/vt-d: debugfs: Avoid dumping context command register
Date: Thu, 18 Sep 2025 12:37:11 +0800 [thread overview]
Message-ID: <7c211a7a-c68d-41c6-8f1b-76af74a3def6@linux.intel.com> (raw)
In-Reply-To: <20250917025051.143853-1-baolu.lu@linux.intel.com>
On 9/17/25 10:50, Lu Baolu wrote:
> The register-based cache invalidation interface is in the process of being
> replaced by the queued invalidation interface. The VT-d architecture
> allows hardware implementations with a queued invalidation interface to
> not implement the registers used for cache invalidation. Currently, the
> debugfs interface dumps the Context Command Register unconditionally,
> which is not reasonable.
>
> Remove it to avoid potential access tonon-present registers.
>
> Signed-off-by: Lu Baolu<baolu.lu@linux.intel.com>
> ---
> drivers/iommu/intel/debugfs.c | 1 -
> 1 file changed, 1 deletion(-)
Queued for v6.18.
prev parent reply other threads:[~2025-09-18 4:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-17 2:50 [PATCH 1/1] iommu/vt-d: debugfs: Avoid dumping context command register Lu Baolu
2025-09-18 4:37 ` Baolu Lu [this message]
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