From: Ankit Soni <Ankit.Soni@amd.com>
To: <iommu@lists.linux.dev>
Cc: <vasant.hegde@amd.com>, <suravee.suthikulpanit@amd.com>,
<joro@8bytes.org>, <will@kernel.org>, <robin.murphy@arm.com>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH 0/2] iommu/amd: Honor IVINFO[PAsize] for paging domains
Date: Mon, 19 Oct 2026 13:08:00 +0000 [thread overview]
Message-ID: <cover.1792156095.git.Ankit.Soni@amd.com> (raw)
The AMD IOMMU driver hardcodes a 52-bit output address size when it
creates paging domains. This series honors the PAsize reported in ACPI
IVRS IVinfo instead, so maps cannot exceed what firmware or a VM
advertises. Patch 1 moves page-table setup into init_pgtable_params()
after the IVHD walk, with no functional change intended. Patch 2 uses that
helper for PAsize and applies it to paging domains.
Ankit Soni (2):
iommu/amd: Move page-table setup into init_pgtable_params()
iommu/amd: Adhere to IVINFO[PAsize] for output address limits
drivers/iommu/amd/amd_iommu.h | 1 +
drivers/iommu/amd/amd_iommu_types.h | 1 +
drivers/iommu/amd/init.c | 95 ++++++++++++++++-------------
drivers/iommu/amd/iommu.c | 4 +-
4 files changed, 58 insertions(+), 43 deletions(-)
base-commit: 90201351a862182bdabfc1ad1c97b1e1b6ed5931
--
2.43.0
next reply other threads:[~2026-10-19 13:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-19 13:08 Ankit Soni [this message]
2026-10-19 13:08 ` [PATCH 1/2] iommu/amd: Move page-table setup into init_pgtable_params() Ankit Soni
2026-10-19 13:08 ` [PATCH 2/2] iommu/amd: Adhere to IVINFO[PAsize] for output address limits Ankit Soni
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