iommu/amd: Enforce 4k mapping for certain IOMMU data structures

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AMD IOMMU requires 4k-aligned pages for the event log, the PPR log,
and the completion wait write-back regions. However, when allocating
the pages, they could be part of large mapping (e.g. 2M) page.
This causes #PF due to the SNP RMP hardware enforces the check based
on the page level for these data structures.

So, fix by calling set_memory_4k() on the allocated pages.

Fixes: c69d89aff3 ("iommu/amd: Use 4K page for completion wait write-back semaphore")
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Link: https://lore.kernel.org/r/20201105145832.3065-1-suravee.suthikulpanit@amd.com
Signed-off-by: Will Deacon <will@kernel.org>

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Suravee Suthikulpanit 2020-11-05 14:58:32 +00:00 • committed by Will Deacon

parent 91c2c28d8d

commit 6d39bdee23

1 changed files with 22 additions and 5 deletions

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drivers/iommu/amd/init.c

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