iommu/amd: Add NUMA node affinity for IOMMU log buffers

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Currently, PPR Log and GA logs for AMD IOMMU are allocated using
iommu_alloc_pages_sz(), which does not account for NUMA affinity. This can
lead to remote memory access latencies if the memory is allocated on a
different node than the IOMMU hardware.

Switch to iommu_alloc_pages_node_sz() to ensure that these data structures
are allocated on the same NUMA node as the IOMMU device. If the node
information is unavailable, it defaults to NUMA_NO_NODE.

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Ankit Soni <Ankit.Soni@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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Li RongQing 2026-02-10 22:58:39 -05:00 • committed by Joerg Roedel

parent f338e77383

commit 1e0c8d6b69

1 changed files with 6 additions and 3 deletions

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drivers/iommu/amd/init.c

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