iommu/amd: Refactor IOMMU interrupt handling logic for Event, PPR, and GA logs

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The AMD IOMMU has three log buffers (i.e. Event, PPR, and GA). The IOMMU
driver processes these log entries when it receive an IOMMU interrupt.
Then, it needs to clear the corresponding interrupt status bits. Also, when
an overflow occurs, it needs to handle the log overflow by clearing the
specific overflow status bit and restart the log.

Since, logic for handling these logs is the same, refactor the code into a
helper function called amd_iommu_handle_irq(), which handles the steps
described. Then, reuse it for all types of log.

Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Vasant Hegde<vasant.hegde@amd.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/20230628053222.5962-2-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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This commit is contained in:

Vasant Hegde 2023-06-28 05:32:21 +00:00 • committed by Joerg Roedel

parent 274c2218b8

commit 2379f34852

2 changed files with 53 additions and 43 deletions

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3

drivers/iommu/amd/amd_iommu.h

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93

drivers/iommu/amd/iommu.c

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