From: Baolu Lu <baolu.lu@linux.intel.com>
To: Oliver Lin <oliver@liuxiaozhen.dev>
Cc: iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
joro@8bytes.org, robin.murphy@arm.com, will@kernel.org
Subject: Re: [PATCH] iommu/vt-d: respect user override for intel_iommu=on on Lenovo ThinkPad P50s
Date: Fri, 3 Jul 2026 09:26:37 +0800 [thread overview]
Message-ID: <b744ef83-6cab-4f4f-a22a-251e08b62656@linux.intel.com> (raw)
In-Reply-To: <20260702103137.508709-1-oliver@liuxiaozhen.dev>
On 7/2/26 18:31, Oliver Lin wrote:
> From: oliver<oliver@liuxiaozhen.dev>
>
> The current DMI quirk disables VT-d on ThinkPad P50s unconditionally,
> even when intel_iommu=on is explicitly requested via kernel command line.
The current driver doesn't have the DMI quirk, so this patch cannot be
applied to the tree as-is.
> This breaks kernel parameter precedence and user intent.
>
> Make the quirk conditional so that it does not override explicit user
> enabling of Intel IOMMU.
>
> Signed-off-by: Oliver<oliver@liuxiaozhen.dev>
> ---
> drivers/iommu/intel/iommu.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
Thanks,
baolu
next prev parent reply other threads:[~2026-07-03 1:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-20 19:22 [PATCH] iommu/vt-d: Disable IOMMU " Oliver Lin
2026-06-21 1:29 ` Baolu Lu
[not found] ` <e4deced7-aabf-44d2-859c-d0b0add48d76@liuxiaozhen.dev>
2026-07-01 17:03 ` Oliver Lin
2026-07-02 10:31 ` [PATCH] iommu/vt-d: respect user override for intel_iommu=on " Oliver Lin
2026-07-03 1:26 ` Baolu Lu [this message]
2026-07-03 9:23 ` [PATCH v3] iommu/vt-d: Disable IOMMU by default " Oliver Lin
2026-07-13 1:55 ` Baolu Lu
2026-07-13 2:27 ` Oliver Lin
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