iommu/riscv: Empty iommu queue before enabling it

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Changing cqen/fqen/pqen from 0 to 1 sets the cqh/fqt/pqt registers to 0.
But the cqt/fqh/pqh registers are left unmodified. This commit resets
cqt/fqh/pqh registers to ensure corresponding queues are empty before
being enabled during initialization.

Signed-off-by: Xu Lu <luxu.kernel@bytedance.com>
Link: https://lore.kernel.org/r/20250103093220.38106-2-luxu.kernel@bytedance.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Xu Lu 2025-01-03 17:32:19 +08:00 • committed by Joerg Roedel

parent d5f88acdd6

commit 8d8d3752c0

1 changed files with 6 additions and 0 deletions

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drivers/iommu/riscv/iommu.c

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