IOMMU Fixes for Linux v7.4-rc1

Hi Linus,

The following changes since commit 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4:

Linux 7.4-rc1 (2026-11-01 13:26:31 -0800)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux.git tags/iommu-fixes-v7.4-rc1

for you to fetch changes up to 2cf4be57b301ed2d7af82e70cff5dfd96894d8de:

iommu/amd: Fix NULL pointer dereference for GPUs without upstream bridge (2026-11-06 13:22:44 +0100)

----------------------------------------------------------------
IOMMU Fixes for Linux v7.4-rc1

Including:

- AMD IOMMU:
- Move PerfOpt management into the IOMMU domain attachment paths, enabling it automatically for supported integrated GPUs in identity mode and clearing it before switching to translated or blocked domains.

- Fix a boot panic in the GPU identity-mapping quirk when a GPU has no upstream PCI bridge.

- Clear the IOMMU SNP enable flag when RMP table initialization fails, preventing subsequent initialization from assuming SNP setup succeeded.

- Check IVRS subtable types before parsing memory definitions, avoiding bogus PCI segments caused by misinterpreting IVHD entries under QEMU.

- Remove an obsolete warning on device release that incorrectly fires for devices required to remain attached to an identity domain.

----------------------------------------------------------------
Akshay Jindal (1):
iommu/amd: Skip non-IVMD entries when parsing IVRS memory definitions

Dheeraj Kumar Srivastava (1):
iommu/amd: Clear amd_iommu_snp_en if snp_rmptable_init() fails

Jean-Christophe Guillain (1):
iommu/amd: Fix NULL pointer dereference for GPUs without upstream bridge

Kevin Mitchell (1):
iommu/amd: remove obsolete domain pointer warning on release

Mario Limonciello (AMD) (1):
iommu/amd: Enable PerfOpt automatically for integrated GPUs

 drivers/gpu/drm/amd/amdgpu/amdgpu.h        |   1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |  50 ------
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    |  12 --
 drivers/iommu/amd/amd_iommu.h              |   3 +-
 drivers/iommu/amd/amd_iommu_types.h        |   6 +-
 drivers/iommu/amd/init.c                   | 106 ++++++-----
 drivers/iommu/amd/iommu.c                  | 273 +++++------------------------
 include/linux/amd-iommu.h                  |  11 --
 8 files changed, 115 insertions(+), 347 deletions(-)

Please pull.

Thanks,

Joerg