iommu/vt-d: Remove LPIG from page group response descriptor

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[ Upstream commit 4402e8f39d ]

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>
Link: https://lore.kernel.org/r/20250901053943.1708490-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Lu Baolu 2025-09-18 13:02:01 +08:00 • committed by Greg Kroah-Hartman

parent d908f39b8c

commit 040effd554

2 changed files with 2 additions and 6 deletions

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1

drivers/iommu/intel/iommu.h

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7

drivers/iommu/intel/prq.c

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