iommu/amd: Rate limit INVALID_PPR_REQUEST error logging

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The amd_iommu_report_ppr_err() function logs an error message for every
INVALID_PPR_REQUEST event. Under certain fault conditions, a misbehaving
or malicious device can flood the IOMMU event log with PPR faults, causing
the kernel log to be overwhelmed with repeated error messages.

Switch from dev_err() to dev_err_ratelimited() to suppress duplicate
messages when INVALID_PPR_REQUEST events occur at a high rate.

Signed-off-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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Vasant Hegde 2026-08-11 04:08:59 +00:00 • committed by Joerg Roedel

parent bc1f5ec826

commit abdbd786c5

1 changed files with 4 additions and 3 deletions

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drivers/iommu/amd/iommu.c

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