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>,
Jason Gunthorpe <jgg@nvidia.com>
Cc: iommu@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] iommu/vt-d: Remove LPIG from page group response descriptor
Date: Tue, 16 Sep 2025 12:55:48 +0800 [thread overview]
Message-ID: <7a1c334d-4fc5-49c5-9e67-b220ea073f81@linux.intel.com> (raw)
In-Reply-To: <20250901053943.1708490-1-baolu.lu@linux.intel.com>
On 9/1/25 13:39, Lu Baolu wrote:
> Bit 66 in the page group response descriptor used to be the LPIG (Last
> Page in Group), but it was marked as Reserved since Specification 4.0.
> Remove programming on this bit to make it consistent with the latest
> specification.
>
> Existing hardware all treats bit 66 of the page group response descriptor
> as "ignored", therefore this change doesn't break any existing hardware.
>
> Signed-off-by: Lu Baolu<baolu.lu@linux.intel.com>
> ---
> drivers/iommu/intel/iommu.h | 1 -
> drivers/iommu/intel/prq.c | 7 ++-----
> 2 files changed, 2 insertions(+), 6 deletions(-)
Queued for v6.18.
prev parent reply other threads:[~2025-09-16 4:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-01 5:39 [PATCH 1/1] iommu/vt-d: Remove LPIG from page group response descriptor Lu Baolu
2025-09-16 4:55 ` Baolu Lu [this message]
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